function

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v1.0.3 Latest Latest
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 Go to latest Published: Jun 14, 2023 License: Apache-2.0 Imports: 40 Imported by: 0

Documentation

Index

Constants

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const (
	// NumBytes counts the number of bytes in a string or binary content.
	NumBytes = CountType(false)
	// NumChars counts the number of characters in a string or binary content.
	NumChars = CountType(true)
)

Variables

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var BuiltIns = []sql.Function{}/* 163 elements not displayed */

BuiltIns is the set of built-in functions any integrator can use

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var ErrConcatArrayWithOthers = errors.NewKind("can't concat a string array with any other elements")

ErrConcatArrayWithOthers is returned when there are more than 1 argument in concat and any of them is an array.

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var ErrDivisionByZero = errors.NewKind("division by zero")
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var ErrFunctionAlreadyRegistered = errors.NewKind("function '%s' is already registered")

ErrFunctionAlreadyRegistered is thrown when a function is already registered

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var ErrIllegalLockNameArgType = errors.NewKind("Illegal parameter data type %s for operation '%s'")

ErrIllegalLockNameArgType is a kind of error that is thrown when the parameter passed as a lock name is not a string.

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var ErrInvalidArgument = errors.NewKind("invalid argument to function %s. %s.")
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var ErrInvalidArgumentForLogarithm = errors.NewKind("invalid argument value for logarithm: %v")

ErrInvalidArgumentForLogarithm is returned when an invalid argument value is passed to a logarithm function

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var ErrInvalidArgumentType = errors.NewKind("function '%s' received invalid argument types")

ErrInvalidArgumentType is thrown when a function receives invalid argument types

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var ErrNegativeRepeatCount = errors.NewKind("negative Repeat count: %v")
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var ErrTimeUnexpectedlyNil = errors.NewKind("time in function '%s' unexpectedly nil")

ErrTimeUnexpectedlyNil is thrown when a function encounters and unexpectedly nil time

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var ErrUintOverflow = errors.NewKind(
	"Unsigned integer too big to fit on signed integer")
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var ErrUnknownType = errors.NewKind("function '%s' encountered unknown type %T")

ErrUnknownType is thrown when a function encounters and unknown type

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var ErrUnsupportedJSONFunction = errors.NewKind("unsupported JSON function: %s")

ErrUnsupportedJSONFunction is returned when a unsupported JSON function is called.

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var ErrUnsupportedType = errors.NewKind("unsupported type for greatest/least argument: %T")

ErrUnsupportedType is returned when an argument to Greatest or Latest is not numeric or string

Functions

func CreateNewGetLock 

func CreateNewGetLock(ls *sql.LockSubsystem) func(e1, e2 sql.Expression) sql.Expression

CreateNewGetLock returns a new GetLock object

func GetLockingFuncs 

func GetLockingFuncs(ls *sql.LockSubsystem) []sql.Function

func IsFreeLockFunc 

func IsFreeLockFunc(_ *sql.Context, ls *sql.LockSubsystem, lockName string) (interface{}, error)

IsFreeLockFunc is the function logic that is executed when the is_free_lock function is called.

func IsUsedLockFunc 

func IsUsedLockFunc(ctx *sql.Context, ls *sql.LockSubsystem, lockName string) (interface{}, error)

IsUsedLockFunc is the function logic that is executed when the is_used_lock function is called.

func NewAbsVal 

func NewAbsVal(e sql.Expression) sql.Expression

NewAbsVal creates a new AbsVal expression.

func NewAcos 

func NewAcos(arg sql.Expression) sql.Expression

NewAcos returns a new ACOS function expression

func NewArrayLength 

func NewArrayLength(array sql.Expression) sql.Expression

NewArrayLength creates a new ArrayLength UDF.

func NewAscii 

func NewAscii(arg sql.Expression) sql.Expression

func NewAsin 

func NewAsin(arg sql.Expression) sql.Expression

NewAsin returns a new ASIN function expression

func NewAtan 

func NewAtan(arg sql.Expression) sql.Expression

NewAtan returns a new ATAN function expression

func NewBin 

func NewBin(arg sql.Expression) sql.Expression

func NewBinToUUID 

func NewBinToUUID(args ...sql.Expression) (sql.Expression, error)

func NewBitlength 

func NewBitlength(arg sql.Expression) sql.Expression

func NewCeil 

func NewCeil(num sql.Expression) sql.Expression

NewCeil creates a new Ceil expression.

func NewCharLength 

func NewCharLength(e sql.Expression) sql.Expression

NewCharLength returns a new CHAR_LENGTH function.

func NewCoalesce 

func NewCoalesce(args ...sql.Expression) (sql.Expression, error)

NewCoalesce creates a new Coalesce sql.Expression.

func NewConcat 

func NewConcat(args ...sql.Expression) (sql.Expression, error)

NewConcat creates a new Concat UDF.

func NewConcatWithSeparator 

func NewConcatWithSeparator(args ...sql.Expression) (sql.Expression, error)

NewConcatWithSeparator creates a new NewConcatWithSeparator UDF.

func NewConnectionID 

func NewConnectionID() sql.Expression

func NewConvertTz 

func NewConvertTz(dt, fromTz, toTz sql.Expression) sql.Expression

NewConvertTz returns an implementation of the CONVERT_TZ() function.

func NewCos 

func NewCos(arg sql.Expression) sql.Expression

NewCos returns a new COS function expression

func NewCot 

func NewCot(arg sql.Expression) sql.Expression

NewCot returns a new COT function expression

func NewCrc32 

func NewCrc32(arg sql.Expression) sql.Expression

NewCrc32 returns a new CRC32 function expression

func NewCurrDate 

func NewCurrDate() sql.Expression

func NewCurrTime 

func NewCurrTime() sql.Expression

func NewCurrTimestamp 

func NewCurrTimestamp() sql.Expression

func NewCurrentDate 

func NewCurrentDate() sql.Expression

func NewCurrentTime 

func NewCurrentTime() sql.Expression

func NewCurrentUser 

func NewCurrentUser() sql.Expression

func NewDatabase 

func NewDatabase() sql.Expression

NewDatabase returns a new Database function

func NewDate 

func NewDate(date sql.Expression) sql.Expression

NewDate returns a new Date node.

func NewDateAdd 

func NewDateAdd(args ...sql.Expression) (sql.Expression, error)

NewDateAdd creates a new date add function.

func NewDateFormat 

func NewDateFormat(ex, value sql.Expression) sql.Expression

NewDateFormat returns a new DateFormat UDF

func NewDateSub 

func NewDateSub(args ...sql.Expression) (sql.Expression, error)

NewDateSub creates a new date add function.

func NewDatetime 

func NewDatetime(args ...sql.Expression) (sql.Expression, error)

NewDatetime returns a DatetimeConversion instance to handle the sql function "datetime". This is not a standard mysql function, but provides a shorthand for datetime conversions.

func NewDay 

func NewDay(date sql.Expression) sql.Expression

NewDay creates a new Day UDF.

func NewDayName 

func NewDayName(arg sql.Expression) sql.Expression

func NewDayOfWeek 

func NewDayOfWeek(date sql.Expression) sql.Expression

NewDayOfWeek creates a new DayOfWeek UDF.

func NewDayOfYear 

func NewDayOfYear(date sql.Expression) sql.Expression

NewDayOfYear creates a new DayOfYear UDF.

func NewDegrees 

func NewDegrees(arg sql.Expression) sql.Expression

NewDegrees returns a new DEGREES function expression

func NewExplode 

func NewExplode(child sql.Expression) sql.Expression

NewExplode creates a new Explode function.

func NewFloor 

func NewFloor(num sql.Expression) sql.Expression

NewFloor returns a new Floor expression.

func NewFoundRows 

func NewFoundRows() sql.Expression

func NewFromBase64 

func NewFromBase64(e sql.Expression) sql.Expression

NewFromBase64 creates a new FromBase64 expression.

func NewFromUnixtime 

func NewFromUnixtime(arg sql.Expression) sql.Expression

func NewGenerate 

func NewGenerate(child sql.Expression) sql.Expression

NewGenerate creates a new Generate function.

func NewGreatest 

func NewGreatest(args ...sql.Expression) (sql.Expression, error)

NewGreatest creates a new Greatest UDF

func NewHex 

func NewHex(arg sql.Expression) sql.Expression

func NewHour 

func NewHour(date sql.Expression) sql.Expression

NewHour creates a new Hour UDF.

func NewIf 

func NewIf(expr, ifTrue, ifFalse sql.Expression) sql.Expression

NewIf returns a new IF UDF

func NewIfNull 

func NewIfNull(ex, value sql.Expression) sql.Expression

NewIfNull returns a new IFNULL UDF

func NewInstr 

func NewInstr(str, substr sql.Expression) sql.Expression

NewInstr creates a new instr UDF.

func NewIsBinary 

func NewIsBinary(e sql.Expression) sql.Expression

NewIsBinary creates a new IsBinary expression.

func NewIsFreeLock 

func NewIsFreeLock(ls *sql.LockSubsystem) sql.CreateFunc1Args

func NewIsNull 

func NewIsNull(e sql.Expression) sql.Expression

NewIsNull creates a new IsNull expression.

func NewIsUUID 

func NewIsUUID(arg sql.Expression) sql.Expression

func NewIsUsedLock 

func NewIsUsedLock(ls *sql.LockSubsystem) sql.CreateFunc1Args

func NewJSONArray 

func NewJSONArray(args ...sql.Expression) (sql.Expression, error)

NewJSONArray creates a new JSONArray function.

func NewJSONArrayAppend 

func NewJSONArrayAppend(args ...sql.Expression) (sql.Expression, error)

NewJSONArrayAppend creates a new JSONArrayAppend function.

func NewJSONArrayInsert 

func NewJSONArrayInsert(args ...sql.Expression) (sql.Expression, error)

NewJSONArrayInsert creates a new JSONArrayInsert function.

func NewJSONContains 

func NewJSONContains(args ...sql.Expression) (sql.Expression, error)

NewJSONContains creates a new JSONContains function.

func NewJSONContainsPath 

func NewJSONContainsPath(args ...sql.Expression) (sql.Expression, error)

NewJSONContainsPath creates a new JSONContainsPath function.

func NewJSONDepth 

func NewJSONDepth(args ...sql.Expression) (sql.Expression, error)

NewJSONDepth creates a new JSONDepth function.

func NewJSONExtract 

func NewJSONExtract(args ...sql.Expression) (sql.Expression, error)

NewJSONExtract creates a new JSONExtract UDF.

func NewJSONInsert 

func NewJSONInsert(args ...sql.Expression) (sql.Expression, error)

NewJSONInsert creates a new JSONInsert function.

func NewJSONKeys 

func NewJSONKeys(args ...sql.Expression) (sql.Expression, error)

NewJSONKeys creates a new JSONKeys function.

func NewJSONLength 

func NewJSONLength(args ...sql.Expression) (sql.Expression, error)

NewJSONLength creates a new JSONLength function.

func NewJSONMergePatch 

func NewJSONMergePatch(args ...sql.Expression) (sql.Expression, error)

NewJSONMergePatch creates a new JSONMergePatch function.

func NewJSONMergePreserve 

func NewJSONMergePreserve(args ...sql.Expression) (sql.Expression, error)

NewJSONMergePreserve creates a new JSONMergePreserve function.

func NewJSONObject 

func NewJSONObject(exprs ...sql.Expression) (sql.Expression, error)

NewJSONObject creates a new JSONObject function.

func NewJSONOverlaps 

func NewJSONOverlaps(args ...sql.Expression) (sql.Expression, error)

NewJSONOverlaps creates a new JSONOverlaps function.

func NewJSONPretty 

func NewJSONPretty(args ...sql.Expression) (sql.Expression, error)

NewJSONPretty creates a new JSONPretty function.

func NewJSONQuote 

func NewJSONQuote(args ...sql.Expression) (sql.Expression, error)

NewJSONQuote creates a new JSONQuote function.

func NewJSONRemove 

func NewJSONRemove(args ...sql.Expression) (sql.Expression, error)

NewJSONRemove creates a new JSONRemove function.

func NewJSONReplace 

func NewJSONReplace(args ...sql.Expression) (sql.Expression, error)

NewJSONReplace creates a new JSONReplace function.

func NewJSONSchemaValid 

func NewJSONSchemaValid(args ...sql.Expression) (sql.Expression, error)

NewJSONSchemaValid creates a new JSONSchemaValid function.

func NewJSONSchemaValidationReport 

func NewJSONSchemaValidationReport(args ...sql.Expression) (sql.Expression, error)

NewJSONSchemaValidationReport creates a new JSONSchemaValidationReport function.

func NewJSONSearch 

func NewJSONSearch(args ...sql.Expression) (sql.Expression, error)

NewJSONSearch creates a new NewJSONSearch function.

func NewJSONSet 

func NewJSONSet(args ...sql.Expression) (sql.Expression, error)

NewJSONSet creates a new JSONSet function.

func NewJSONStorageFree 

func NewJSONStorageFree(args ...sql.Expression) (sql.Expression, error)

NewJSONStorageFree creates a new JSONStorageFree function.

func NewJSONStorageSize 

func NewJSONStorageSize(args ...sql.Expression) (sql.Expression, error)

NewJSONStorageSize creates a new JSONStorageSize function.

func NewJSONTable 

func NewJSONTable(args ...sql.Expression) (sql.Expression, error)

NewJSONTable creates a new JSONTable function.

func NewJSONType 

func NewJSONType(args ...sql.Expression) (sql.Expression, error)

NewJSONType creates a new JSONType function.

func NewJSONUnquote 

func NewJSONUnquote(json sql.Expression) sql.Expression

NewJSONUnquote creates a new JSONUnquote UDF.

func NewJSONValid 

func NewJSONValid(args ...sql.Expression) (sql.Expression, error)

NewJSONValid creates a new JSONValid function.

func NewJSONValue 

func NewJSONValue(args ...sql.Expression) (sql.Expression, error)

NewJSONValue creates a new JSONValue function.

func NewLastInsertId 

func NewLastInsertId() sql.Expression

func NewLeast 

func NewLeast(args ...sql.Expression) (sql.Expression, error)

NewLeast creates a new Least UDF

func NewLeft 

func NewLeft(str, len sql.Expression) sql.Expression

NewLeft creates a new LEFT function.

func NewLeftPad 

func NewLeftPad(e ...sql.Expression) (sql.Expression, error)

func NewLeftTrim 

func NewLeftTrim(e sql.Expression) sql.Expression

func NewLength 

func NewLength(e sql.Expression) sql.Expression

NewLength returns a new LENGTH function.

func NewLoadFile 

func NewLoadFile(fileName sql.Expression) sql.Expression

NewLoadFile returns a LoadFile object for the LOAD_FILE() function.

func NewLog 

func NewLog(args ...sql.Expression) (sql.Expression, error)

NewLog creates a new Log expression.

func NewLogBase 

func NewLogBase(base float64, e sql.Expression) sql.Expression

NewLogBase creates a new LogBase expression.

func NewLogBaseFunc 

func NewLogBaseFunc(base float64) func(e sql.Expression) sql.Expression

NewLogBaseFunc returns LogBase creator function with a specific base.

func NewLower 

func NewLower(e sql.Expression) sql.Expression

NewLower creates a new Lower expression.

func NewMD5 

func NewMD5(arg sql.Expression) sql.Expression

NewMD5 returns a new MD5 function expression

func NewMicrosecond 

func NewMicrosecond(arg sql.Expression) sql.Expression

func NewMinute 

func NewMinute(date sql.Expression) sql.Expression

NewMinute creates a new Minute UDF.

func NewMonth 

func NewMonth(date sql.Expression) sql.Expression

NewMonth creates a new Month UDF.

func NewMonthName 

func NewMonthName(arg sql.Expression) sql.Expression

func NewNow 

func NewNow(args ...sql.Expression) (sql.Expression, error)

NewNow returns a new Now node.

func NewNullIf 

func NewNullIf(ex1, ex2 sql.Expression) sql.Expression

NewNullIf returns a new NULLIF UDF

func NewPad 

func NewPad(pType padType, args ...sql.Expression) (sql.Expression, error)

NewPad creates a new Pad expression.

func NewPower 

func NewPower(e1, e2 sql.Expression) sql.Expression

NewPower creates a new Power expression.

func NewRadians 

func NewRadians(arg sql.Expression) sql.Expression

NewRadians returns a new RADIANS function expression

func NewRand 

func NewRand(exprs ...sql.Expression) (sql.Expression, error)

NewRand creates a new Rand expression.

func NewRegexpLike 

func NewRegexpLike(args ...sql.Expression) (sql.Expression, error)

NewRegexpLike creates a new RegexpLike expression.

func NewReleaseAllLocks 

func NewReleaseAllLocks(ls *sql.LockSubsystem) func() sql.Expression

func NewReleaseLock 

func NewReleaseLock(ls *sql.LockSubsystem) sql.CreateFunc1Args

func NewRepeat 

func NewRepeat(str sql.Expression, count sql.Expression) sql.Expression

NewRepeat creates a new Repeat expression.

func NewReplace 

func NewReplace(str sql.Expression, fromStr sql.Expression, toStr sql.Expression) sql.Expression

NewReplace creates a new Replace expression.

func NewReverse 

func NewReverse(e sql.Expression) sql.Expression

NewReverse creates a new Reverse expression.

func NewRightPad 

func NewRightPad(e ...sql.Expression) (sql.Expression, error)

func NewRightTrim 

func NewRightTrim(e sql.Expression) sql.Expression

func NewRound 

func NewRound(args ...sql.Expression) (sql.Expression, error)

NewRound returns a new Round expression.

func NewRowCount 

func NewRowCount() sql.Expression

func NewSHA1 

func NewSHA1(arg sql.Expression) sql.Expression

NewSHA1 returns a new SHA1 function expression

func NewSHA2 

func NewSHA2(arg, count sql.Expression) sql.Expression

NewSHA2 returns a new SHA2 function expression

func NewSecond 

func NewSecond(date sql.Expression) sql.Expression

NewSecond creates a new Second UDF.

func NewSign 

func NewSign(arg sql.Expression) sql.Expression

NewSign returns a new SIGN function expression

func NewSin 

func NewSin(arg sql.Expression) sql.Expression

NewSin returns a new SIN function expression

func NewSleep 

func NewSleep(e sql.Expression) sql.Expression

NewSleep creates a new Sleep expression.

func NewSoundex 

func NewSoundex(e sql.Expression) sql.Expression

NewSoundex creates a new Soundex expression.

func NewSplit 

func NewSplit(str, delimiter sql.Expression) sql.Expression

NewSplit creates a new Split UDF.

func NewSqrt 

func NewSqrt(e sql.Expression) sql.Expression

NewSqrt creates a new Sqrt expression.

func NewStrToDate 

func NewStrToDate(args ...sql.Expression) (sql.Expression, error)

NewStrToDate constructs a new function expression from the given child expressions.

func NewSubstring 

func NewSubstring(args ...sql.Expression) (sql.Expression, error)

NewSubstring creates a new substring UDF.

func NewSubstringIndex 

func NewSubstringIndex(str, delim, count sql.Expression) sql.Expression

NewSubstringIndex creates a new SubstringIndex UDF.

func NewTan 

func NewTan(arg sql.Expression) sql.Expression

NewTan returns a new TAN function expression

func NewTimeDiff 

func NewTimeDiff(e1, e2 sql.Expression) sql.Expression

NewTimeDiff creates a new NewTimeDiff expression.

func NewTimeToSec 

func NewTimeToSec(arg sql.Expression) sql.Expression

func NewTimestamp 

func NewTimestamp(args ...sql.Expression) (sql.Expression, error)

func NewToBase64 

func NewToBase64(e sql.Expression) sql.Expression

NewToBase64 creates a new ToBase64 expression.

func NewTrim 

func NewTrim(e sql.Expression) sql.Expression

func NewUTCTimestamp 

func NewUTCTimestamp(args ...sql.Expression) (sql.Expression, error)

NewUTCTimestamp returns a new UTCTimestamp node.

func NewUUIDFunc 

func NewUUIDFunc() sql.Expression

func NewUUIDToBin 

func NewUUIDToBin(args ...sql.Expression) (sql.Expression, error)

func NewUnhex 

func NewUnhex(arg sql.Expression) sql.Expression

func NewUnixTimestamp 

func NewUnixTimestamp(args ...sql.Expression) (sql.Expression, error)

func NewUpper 

func NewUpper(e sql.Expression) sql.Expression

NewUpper creates a new Lower expression.

func NewUser 

func NewUser() sql.Expression

func NewValues 

func NewValues(col sql.Expression) sql.Expression

NewValues creates a new Values function.

func NewVersion 

func NewVersion(versionPostfix string) func(...sql.Expression) (sql.Expression, error)

NewVersion creates a new Version UDF.

func NewWeek 

func NewWeek(args ...sql.Expression) (sql.Expression, error)

NewWeek creates a new Week UDF

func NewWeekOfYear 

func NewWeekOfYear(arg sql.Expression) sql.Expression

func NewWeekday 

func NewWeekday(date sql.Expression) sql.Expression

NewWeekday creates a new Weekday UDF.

func NewYear 

func NewYear(date sql.Expression) sql.Expression

NewYear creates a new Year UDF.

func NewYearWeek 

func NewYearWeek(args ...sql.Expression) (sql.Expression, error)

NewYearWeek creates a new YearWeek UDF

func NoArgFuncWithChildren 

func NoArgFuncWithChildren(fn sql.Expression, children []sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

func ReleaseLockFunc 

func ReleaseLockFunc(ctx *sql.Context, ls *sql.LockSubsystem, lockName string) (interface{}, error)

ReleaseLockFunc is the function logic that is executed when the release_lock function is called.

Types

type AbsVal 

type AbsVal struct {
	expression.UnaryExpression
}

AbsVal is a function that takes the absolute value of a number

func (*AbsVal) Eval 

func (t *AbsVal) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*AbsVal) FunctionName 

func (t *AbsVal) FunctionName() string

func (*AbsVal) IsNullable 

func (t *AbsVal) IsNullable() bool

IsNullable implements the Expression interface.

func (*AbsVal) String 

func (t *AbsVal) String() string

String implements the fmt.Stringer interface.

func (*AbsVal) Type 

func (t *AbsVal) Type() sql.Type

Type implements the Expression interface.

func (*AbsVal) WithChildren 

func (t *AbsVal) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Acos 

type Acos struct {
	*UnaryFunc
}

func (*Acos) Eval 

func (a *Acos) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*Acos) WithChildren 

func (a *Acos) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type AppendFuncWrapper 

type AppendFuncWrapper struct {
	// contains filtered or unexported fields
}

func (AppendFuncWrapper) Append 

func (af AppendFuncWrapper) Append(bytes []byte, t time.Time) []byte

type ArrayLength 

type ArrayLength struct {
	expression.UnaryExpression
}

ArrayLength returns the length of an array.

func (*ArrayLength) Eval 

func (f *ArrayLength) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*ArrayLength) FunctionName 

func (f *ArrayLength) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*ArrayLength) String 

func (f *ArrayLength) String() string

func (*ArrayLength) Type 

func (*ArrayLength) Type() sql.Type

Type implements the Expression interface.

func (*ArrayLength) WithChildren 

func (f *ArrayLength) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Ascii 

type Ascii struct {
	*UnaryFunc
}

Ascii implements the sql function "ascii" which returns the numeric value of the leftmost character

func (*Ascii) Eval 

func (a *Ascii) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface

func (*Ascii) WithChildren 

func (a *Ascii) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the sql.Expression interface

type Asin 

type Asin struct {
	*UnaryFunc
}

func (*Asin) Eval 

func (a *Asin) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*Asin) WithChildren 

func (a *Asin) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type Atan 

type Atan struct {
	*UnaryFunc
}

func (*Atan) Eval 

func (a *Atan) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*Atan) WithChildren 

func (a *Atan) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type Bin 

type Bin struct {
	*UnaryFunc
}

Bin implements the sql function "bin" which returns the binary representation of a number

func (*Bin) Eval 

func (h *Bin) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface

func (*Bin) WithChildren 

func (h *Bin) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the sql.Expression interface

type BinToUUID 

type BinToUUID struct {
	// contains filtered or unexported fields
}

func (BinToUUID) Children 

func (bu BinToUUID) Children() []sql.Expression

Children returns the children expressions of this expression.

func (BinToUUID) Eval 

func (bu BinToUUID) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (BinToUUID) FunctionName 

func (bu BinToUUID) FunctionName() string

func (BinToUUID) IsNullable 

func (bu BinToUUID) IsNullable() bool

IsNullable returns whether the expression can be null.

func (BinToUUID) Resolved 

func (bu BinToUUID) Resolved() bool

func (BinToUUID) String 

func (bu BinToUUID) String() string

func (BinToUUID) Type 

func (bu BinToUUID) Type() sql.Type

func (BinToUUID) WithChildren 

func (bu BinToUUID) WithChildren(children ...sql.Expression) (sql.Expression, error)

type Bitlength 

type Bitlength struct {
	*UnaryFunc
}

Bitlength implements the sql function "bit_length" which returns the data length of the argument in bits

func (*Bitlength) Eval 

func (h *Bitlength) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface

func (*Bitlength) WithChildren 

func (h *Bitlength) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the sql.Expression interface

type Ceil 

type Ceil struct {
	expression.UnaryExpression
}

Ceil returns the smallest integer value not less than X.

func (*Ceil) Eval 

func (c *Ceil) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Ceil) FunctionName 

func (c *Ceil) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Ceil) String 

func (c *Ceil) String() string

func (*Ceil) Type 

func (c *Ceil) Type() sql.Type

Type implements the Expression interface.

func (*Ceil) WithChildren 

func (c *Ceil) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Coalesce 

type Coalesce struct {
	// contains filtered or unexported fields
}

Coalesce returns the first non-NULL value in the list, or NULL if there are no non-NULL values.

func (*Coalesce) Children 

func (c *Coalesce) Children() []sql.Expression

Children implements the sql.Expression interface.

func (*Coalesce) Eval 

func (c *Coalesce) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface. The function evaluates the first non-nil argument. If the value is nil, then we keep going, otherwise we return the first non-nil value.

func (*Coalesce) FunctionName 

func (c *Coalesce) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Coalesce) IsNullable 

func (c *Coalesce) IsNullable() bool

IsNullable implements the sql.Expression interface. Returns true if all arguments are nil or of the first non-nil argument is nullable, otherwise false.

func (*Coalesce) Resolved 

func (c *Coalesce) Resolved() bool

Resolved implements the sql.Expression interface. The function checks if first non-nil argument is resolved.

func (*Coalesce) String 

func (c *Coalesce) String() string

func (*Coalesce) Type 

func (c *Coalesce) Type() sql.Type

Type implements the sql.Expression interface. The return type of Type() is the aggregated type of the argument types.

func (*Coalesce) WithChildren 

func (*Coalesce) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Concat 

type Concat struct {
	// contains filtered or unexported fields
}

Concat joins several strings together.

func (*Concat) Children 

func (f *Concat) Children() []sql.Expression

Children implements the Expression interface.

func (*Concat) Eval 

func (f *Concat) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Concat) FunctionName 

func (c *Concat) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Concat) IsNullable 

func (f *Concat) IsNullable() bool

IsNullable implements the Expression interface.

func (*Concat) Resolved 

func (f *Concat) Resolved() bool

Resolved implements the Expression interface.

func (*Concat) String 

func (f *Concat) String() string

func (*Concat) Type 

func (f *Concat) Type() sql.Type

Type implements the Expression interface.

func (*Concat) WithChildren 

func (*Concat) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type ConcatWithSeparator 

type ConcatWithSeparator struct {
	// contains filtered or unexported fields
}

ConcatWithSeparator joins several strings together. The first argument is the separator for the rest of the arguments. The separator is added between the strings to be concatenated. The separator can be a string, as can the rest of the arguments. If the separator is NULL, the result is NULL.

func (*ConcatWithSeparator) Children 

func (f *ConcatWithSeparator) Children() []sql.Expression

Children implements the Expression interface.

func (*ConcatWithSeparator) Eval 

func (f *ConcatWithSeparator) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*ConcatWithSeparator) FunctionName 

func (f *ConcatWithSeparator) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*ConcatWithSeparator) IsNullable 

func (f *ConcatWithSeparator) IsNullable() bool

IsNullable implements the Expression interface.

func (*ConcatWithSeparator) Resolved 

func (f *ConcatWithSeparator) Resolved() bool

Resolved implements the Expression interface.

func (*ConcatWithSeparator) String 

func (f *ConcatWithSeparator) String() string

func (*ConcatWithSeparator) Type 

func (f *ConcatWithSeparator) Type() sql.Type

Type implements the Expression interface.

func (*ConcatWithSeparator) WithChildren 

func (*ConcatWithSeparator) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type ConnectionID 

type ConnectionID struct {
	NoArgFunc
}

func (ConnectionID) Eval 

func (c ConnectionID) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (ConnectionID) WithChildren 

func (c ConnectionID) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type ConvertTz 

type ConvertTz struct {
	// contains filtered or unexported fields
}

func (*ConvertTz) Children 

func (c *ConvertTz) Children() []sql.Expression

Children implements the sql.Expression interface.

func (*ConvertTz) Eval 

func (c *ConvertTz) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface.

func (*ConvertTz) FunctionName 

func (c *ConvertTz) FunctionName() string

FunctionName implement the sql.FunctionExpression interface.

func (*ConvertTz) IsNullable 

func (c *ConvertTz) IsNullable() bool

IsNullable implements the sql.Expression interface.

func (*ConvertTz) Resolved 

func (c *ConvertTz) Resolved() bool

Resolved implements the sql.Expression interface.

func (*ConvertTz) String 

func (c *ConvertTz) String() string

String implements the sql.Expression interface.

func (*ConvertTz) Type 

func (c *ConvertTz) Type() sql.Type

Type implements the sql.Expression interface.

func (*ConvertTz) WithChildren 

func (c *ConvertTz) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the sql.Expression interface.

type Cos 

type Cos struct {
	*UnaryFunc
}

func (*Cos) Eval 

func (s *Cos) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*Cos) WithChildren 

func (c *Cos) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type Cot 

type Cot struct {
	*UnaryFunc
}

func (*Cot) Eval 

func (c *Cot) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*Cot) WithChildren 

func (c *Cot) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type CountType 

type CountType bool

CountType is the kind of length count.

type Crc32 

type Crc32 struct {
	*UnaryFunc
}

func (*Crc32) Eval 

func (c *Crc32) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*Crc32) WithChildren 

func (c *Crc32) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type CurrDate 

type CurrDate struct {
	NoArgFunc
}

func (CurrDate) Eval 

func (c CurrDate) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (CurrDate) WithChildren 

func (c CurrDate) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type CurrTime 

type CurrTime struct {
	NoArgFunc
}

func (CurrTime) Eval 

func (c CurrTime) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (CurrTime) WithChildren 

func (c CurrTime) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type CurrTimestamp 

type CurrTimestamp struct {
	NoArgFunc
}

func (CurrTimestamp) Eval 

func (c CurrTimestamp) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (CurrTimestamp) WithChildren 

func (c CurrTimestamp) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type Database 

type Database struct{}

Database implements the DATABASE() function

func (*Database) Children 

func (db *Database) Children() []sql.Expression

Children implements the sql.Expression interface.

func (*Database) Eval 

func (db *Database) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface.

func (*Database) FunctionName 

func (db *Database) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Database) IsNullable 

func (db *Database) IsNullable() bool

IsNullable implements the sql.Expression interface. The function returns always true

func (*Database) Resolved 

func (db *Database) Resolved() bool

Resolved implements the sql.Expression interface.

func (*Database) String 

func (*Database) String() string

func (*Database) Type 

func (db *Database) Type() sql.Type

Type implements the sql.Expression (sql.LongText)

func (*Database) WithChildren 

func (d *Database) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Date 

type Date struct {
	expression.UnaryExpression
}

Date a function takes the DATE part out from a datetime expression.

func (*Date) Eval 

func (d *Date) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Date) FunctionName 

func (d *Date) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Date) String 

func (d *Date) String() string

func (*Date) Type 

func (d *Date) Type() sql.Type

Type implements the Expression interface.

func (*Date) WithChildren 

func (d *Date) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type DateAdd 

type DateAdd struct {
	Date     sql.Expression
	Interval *expression.Interval
}

DateAdd adds an interval to a date.

func (*DateAdd) Children 

func (d *DateAdd) Children() []sql.Expression

Children implements the sql.Expression interface.

func (*DateAdd) Eval 

func (d *DateAdd) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface.

func (*DateAdd) FunctionName 

func (d *DateAdd) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*DateAdd) IsNullable 

func (d *DateAdd) IsNullable() bool

IsNullable implements the sql.Expression interface.

func (*DateAdd) Resolved 

func (d *DateAdd) Resolved() bool

Resolved implements the sql.Expression interface.

func (*DateAdd) String 

func (d *DateAdd) String() string

func (*DateAdd) Type 

func (d *DateAdd) Type() sql.Type

Type implements the sql.Expression interface.

func (*DateAdd) WithChildren 

func (d *DateAdd) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type DateFormat 

type DateFormat struct {
	expression.BinaryExpression
}

DateFormat function returns a string representation of the date specified in the format specified

func (*DateFormat) Eval 

func (f *DateFormat) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*DateFormat) FunctionName 

func (f *DateFormat) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*DateFormat) IsNullable 

func (f *DateFormat) IsNullable() bool

IsNullable implements the Expression interface.

func (*DateFormat) String 

func (f *DateFormat) String() string

func (*DateFormat) Type 

func (f *DateFormat) Type() sql.Type

Type implements the Expression interface.

func (*DateFormat) WithChildren 

func (f *DateFormat) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type DateSub 

type DateSub struct {
	Date     sql.Expression
	Interval *expression.Interval
}

DateSub subtracts an interval from a date.

func (*DateSub) Children 

func (d *DateSub) Children() []sql.Expression

Children implements the sql.Expression interface.

func (*DateSub) Eval 

func (d *DateSub) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface.

func (*DateSub) FunctionName 

func (d *DateSub) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*DateSub) IsNullable 

func (d *DateSub) IsNullable() bool

IsNullable implements the sql.Expression interface.

func (*DateSub) Resolved 

func (d *DateSub) Resolved() bool

Resolved implements the sql.Expression interface.

func (*DateSub) String 

func (d *DateSub) String() string

func (*DateSub) Type 

func (d *DateSub) Type() sql.Type

Type implements the sql.Expression interface.

func (*DateSub) WithChildren 

func (d *DateSub) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type DatetimeConversion 

type DatetimeConversion struct {
	Date sql.Expression
}

DatetimeConversion is a shorthand function for CONVERT(expr, DATETIME)

func (*DatetimeConversion) Children 

func (t *DatetimeConversion) Children() []sql.Expression

func (*DatetimeConversion) Eval 

func (t *DatetimeConversion) Eval(ctx *sql.Context, r sql.Row) (interface{}, error)

func (*DatetimeConversion) FunctionName 

func (t *DatetimeConversion) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*DatetimeConversion) IsNullable 

func (t *DatetimeConversion) IsNullable() bool

func (*DatetimeConversion) Resolved 

func (t *DatetimeConversion) Resolved() bool

func (*DatetimeConversion) String 

func (t *DatetimeConversion) String() string

func (*DatetimeConversion) Type 

func (t *DatetimeConversion) Type() sql.Type

func (*DatetimeConversion) WithChildren 

func (t *DatetimeConversion) WithChildren(children ...sql.Expression) (sql.Expression, error)

type Day 

type Day struct {
	expression.UnaryExpression
}

Day is a function that returns the day of a date.

func (*Day) Eval 

func (d *Day) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Day) FunctionName 

func (d *Day) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Day) String 

func (d *Day) String() string

func (*Day) Type 

func (d *Day) Type() sql.Type

Type implements the Expression interface.

func (*Day) WithChildren 

func (d *Day) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type DayName 

type DayName struct {
	*UnaryDatetimeFunc
}

DayName implements the DAYNAME function

func (*DayName) Eval 

func (d *DayName) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (*DayName) WithChildren 

func (d *DayName) WithChildren(children ...sql.Expression) (sql.Expression, error)

type DayOfWeek 

type DayOfWeek struct {
	expression.UnaryExpression
}

DayOfWeek is a function that returns the day of the week from a date where 1 = Sunday, ..., 7 = Saturday.

func (*DayOfWeek) Eval 

func (d *DayOfWeek) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*DayOfWeek) FunctionName 

func (d *DayOfWeek) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*DayOfWeek) String 

func (d *DayOfWeek) String() string

func (*DayOfWeek) Type 

func (d *DayOfWeek) Type() sql.Type

Type implements the Expression interface.

func (*DayOfWeek) WithChildren 

func (d *DayOfWeek) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type DayOfYear 

type DayOfYear struct {
	expression.UnaryExpression
}

DayOfYear is a function that returns the day of the year from a date.

func (*DayOfYear) Eval 

func (d *DayOfYear) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*DayOfYear) FunctionName 

func (d *DayOfYear) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*DayOfYear) String 

func (d *DayOfYear) String() string

func (*DayOfYear) Type 

func (d *DayOfYear) Type() sql.Type

Type implements the Expression interface.

func (*DayOfYear) WithChildren 

func (d *DayOfYear) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Degrees 

type Degrees struct {
	*UnaryFunc
}

func (*Degrees) Eval 

func (d *Degrees) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*Degrees) WithChildren 

func (d *Degrees) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type Explode 

type Explode struct {
	Child sql.Expression
}

Explode is a function that generates a row for each value of its child. It is a placeholder expression node.

func (*Explode) Children 

func (e *Explode) Children() []sql.Expression

Children implements the sql.Expression interface.

func (*Explode) Eval 

func (e *Explode) Eval(*sql.Context, sql.Row) (interface{}, error)

Eval implements the sql.Expression interface.

func (*Explode) FunctionName 

func (e *Explode) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Explode) IsNullable 

func (e *Explode) IsNullable() bool

IsNullable implements the sql.Expression interface.

func (*Explode) Resolved 

func (e *Explode) Resolved() bool

Resolved implements the sql.Expression interface.

func (*Explode) String 

func (e *Explode) String() string

func (*Explode) Type 

func (e *Explode) Type() sql.Type

Type implements the sql.Expression interface.

func (*Explode) WithChildren 

func (e *Explode) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Floor 

type Floor struct {
	expression.UnaryExpression
}

Floor returns the biggest integer value not less than X.

func (*Floor) Eval 

func (f *Floor) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Floor) FunctionName 

func (f *Floor) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Floor) String 

func (f *Floor) String() string

func (*Floor) Type 

func (f *Floor) Type() sql.Type

Type implements the Expression interface.

func (*Floor) WithChildren 

func (f *Floor) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type FoundRows 

type FoundRows struct{}

FoundRows implements the FOUND_ROWS() function

func (FoundRows) Children 

func (r FoundRows) Children() []sql.Expression

Children implements sql.Expression

func (FoundRows) Eval 

func (r FoundRows) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (FoundRows) FunctionName 

func (r FoundRows) FunctionName() string

FunctionName implements sql.FunctionExpression

func (FoundRows) IsNullable 

func (r FoundRows) IsNullable() bool

IsNullable implements sql.Expression

func (FoundRows) Resolved 

func (r FoundRows) Resolved() bool

Resolved implements sql.Expression

func (FoundRows) String 

func (r FoundRows) String() string

String implements sql.Expression

func (FoundRows) Type 

func (r FoundRows) Type() sql.Type

Type implements sql.Expression

func (FoundRows) WithChildren 

func (r FoundRows) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type FromBase64 

type FromBase64 struct {
	expression.UnaryExpression
}

FromBase64 is a function to decode a Base64-formatted string using the same dialect that MySQL's FROM_BASE64 uses

func (*FromBase64) Eval 

func (t *FromBase64) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*FromBase64) FunctionName 

func (t *FromBase64) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*FromBase64) IsNullable 

func (t *FromBase64) IsNullable() bool

IsNullable implements the Expression interface.

func (*FromBase64) String 

func (t *FromBase64) String() string

String implements the fmt.Stringer interface.

func (*FromBase64) Type 

func (t *FromBase64) Type() sql.Type

Type implements the Expression interface.

func (*FromBase64) WithChildren 

func (t *FromBase64) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type FromUnixtime 

type FromUnixtime struct {
	*UnaryFunc
}

FromUnixtime converts the argument to a datetime.

func (*FromUnixtime) Eval 

func (r *FromUnixtime) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (*FromUnixtime) WithChildren 

func (r *FromUnixtime) WithChildren(children ...sql.Expression) (sql.Expression, error)

type Generate 

type Generate struct {
	Child sql.Expression
}

Generate is a function that generates a row for each value of its child. This is the non-placeholder counterpart of Explode.

func (*Generate) Children 

func (e *Generate) Children() []sql.Expression

Children implements the sql.Expression interface.

func (*Generate) Eval 

func (e *Generate) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface.

func (*Generate) IsNullable 

func (e *Generate) IsNullable() bool

IsNullable implements the sql.Expression interface.

func (*Generate) Resolved 

func (e *Generate) Resolved() bool

Resolved implements the sql.Expression interface.

func (*Generate) String 

func (e *Generate) String() string

func (*Generate) Type 

func (e *Generate) Type() sql.Type

Type implements the sql.Expression interface.

func (*Generate) WithChildren 

func (e *Generate) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type GetLock 

type GetLock struct {
	expression.BinaryExpression
	// contains filtered or unexported fields
}

GetLock is a SQL function implementing get_lock

func (*GetLock) Eval 

func (gl *GetLock) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*GetLock) FunctionName 

func (gl *GetLock) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*GetLock) IsNullable 

func (gl *GetLock) IsNullable() bool

IsNullable implements the Expression interface.

func (*GetLock) String 

func (gl *GetLock) String() string

String implements the fmt.Stringer interface.

func (*GetLock) Type 

func (gl *GetLock) Type() sql.Type

Type implements the Expression interface.

func (*GetLock) WithChildren 

func (gl *GetLock) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Greatest 

type Greatest struct {
	Args []sql.Expression
	// contains filtered or unexported fields
}

Greatest returns the argument with the greatest numerical or string value. It allows for numeric (ints and floats) and string arguments and will return the used type when all arguments are of the same type or floats if there are numerically convertible strings or integers mixed with floats. When ints or floats are mixed with non numerically convertible strings, those are ignored.

func (*Greatest) Children 

func (f *Greatest) Children() []sql.Expression

Children implements the Expression interface.

func (*Greatest) Eval 

func (f *Greatest) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Greatest) FunctionName 

func (f *Greatest) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Greatest) IsNullable 

func (f *Greatest) IsNullable() bool

IsNullable implements the Expression interface.

func (*Greatest) Resolved 

func (f *Greatest) Resolved() bool

Resolved implements the Expression interface.

func (*Greatest) String 

func (f *Greatest) String() string

func (*Greatest) Type 

func (f *Greatest) Type() sql.Type

Type implements the Expression interface.

func (*Greatest) WithChildren 

func (f *Greatest) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Hex 

type Hex struct {
	*UnaryFunc
}

Hex implements the sql function "hex" which returns the hexadecimal representation of the string or numeric value

func (*Hex) Eval 

func (h *Hex) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface

func (*Hex) WithChildren 

func (h *Hex) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the sql.Expression interface

type Hour 

type Hour struct {
	expression.UnaryExpression
}

Hour is a function that returns the hour of a date.

func (*Hour) Eval 

func (h *Hour) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Hour) FunctionName 

func (h *Hour) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Hour) String 

func (h *Hour) String() string

func (*Hour) Type 

func (h *Hour) Type() sql.Type

Type implements the Expression interface.

func (*Hour) WithChildren 

func (h *Hour) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type If 

type If struct {
	// contains filtered or unexported fields
}

If function returns the second value if the first is true, the third value otherwise.

func (*If) Children 

func (f *If) Children() []sql.Expression

func (*If) Eval 

func (f *If) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*If) FunctionName 

func (f *If) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*If) IsNullable 

func (f *If) IsNullable() bool

IsNullable implements the Expression interface.

func (*If) Resolved 

func (f *If) Resolved() bool

func (*If) String 

func (f *If) String() string

func (*If) Type 

func (f *If) Type() sql.Type

Type implements the Expression interface.

func (*If) WithChildren 

func (f *If) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type IfNull 

type IfNull struct {
	expression.BinaryExpression
}

IfNull function returns the specified value IF the expression is NULL, otherwise return the expression.

func (*IfNull) Eval 

func (f *IfNull) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*IfNull) FunctionName 

func (f *IfNull) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*IfNull) IsNullable 

func (f *IfNull) IsNullable() bool

IsNullable implements the Expression interface.

func (*IfNull) String 

func (f *IfNull) String() string

func (*IfNull) Type 

func (f *IfNull) Type() sql.Type

Type implements the Expression interface.

func (*IfNull) WithChildren 

func (f *IfNull) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Instr 

type Instr struct {
	// contains filtered or unexported fields
}

func (Instr) Children 

func (i Instr) Children() []sql.Expression

Children implements the Expression interface.

func (Instr) Eval 

func (i Instr) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (Instr) FunctionName 

func (i Instr) FunctionName() string

FunctionName implements sql.FunctionExpression

func (Instr) IsNullable 

func (i Instr) IsNullable() bool

IsNullable implements the Expression interface.

func (Instr) Resolved 

func (i Instr) Resolved() bool

Resolved implements the Expression interface.

func (Instr) String 

func (i Instr) String() string

func (Instr) Type 

func (Instr) Type() sql.Type

Type implements the Expression interface.

func (Instr) WithChildren 

func (i Instr) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type IsBinary 

type IsBinary struct {
	expression.UnaryExpression
}

IsBinary is a function that returns whether a blob is binary or not.

func (*IsBinary) Eval 

func (ib *IsBinary) Eval(
	ctx *sql.Context,
	row sql.Row,
) (interface{}, error)

Eval implements the Expression interface.

func (*IsBinary) FunctionName 

func (ib *IsBinary) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*IsBinary) String 

func (ib *IsBinary) String() string

func (*IsBinary) Type 

func (ib *IsBinary) Type() sql.Type

Type implements the Expression interface.

func (*IsBinary) WithChildren 

func (ib *IsBinary) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type IsFreeLock 

type IsFreeLock struct {
	NamedLockFunction
}

func (*IsFreeLock) Eval 

func (i *IsFreeLock) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (*IsFreeLock) WithChildren 

func (i *IsFreeLock) WithChildren(children ...sql.Expression) (sql.Expression, error)

type IsNull 

type IsNull struct {
	expression.UnaryExpression
}

IsNull is a function that returns whether a value is null or not.

func (*IsNull) Eval 

func (ib *IsNull) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*IsNull) FunctionName 

func (ib *IsNull) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*IsNull) String 

func (ib *IsNull) String() string

func (*IsNull) Type 

func (ib *IsNull) Type() sql.Type

Type implements the Expression interface.

func (*IsNull) WithChildren 

func (ib *IsNull) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type IsUUID 

type IsUUID struct {
	// contains filtered or unexported fields
}

func (IsUUID) Children 

func (u IsUUID) Children() []sql.Expression

Children returns the children expressions of this expression.

func (IsUUID) Eval 

func (u IsUUID) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (IsUUID) FunctionName 

func (u IsUUID) FunctionName() string

func (IsUUID) IsNullable 

func (u IsUUID) IsNullable() bool

IsNullable returns whether the expression can be null.

func (IsUUID) Resolved 

func (u IsUUID) Resolved() bool

func (IsUUID) String 

func (u IsUUID) String() string

func (IsUUID) Type 

func (u IsUUID) Type() sql.Type

func (IsUUID) WithChildren 

func (u IsUUID) WithChildren(children ...sql.Expression) (sql.Expression, error)

type IsUsedLock 

type IsUsedLock struct {
	NamedLockFunction
}

func (*IsUsedLock) Eval 

func (i *IsUsedLock) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (*IsUsedLock) WithChildren 

func (i *IsUsedLock) WithChildren(children ...sql.Expression) (sql.Expression, error)

type JSONArray 

type JSONArray struct {
	sql.Expression
}

JSON_ARRAY([val[, val] ...])

JSONArray Evaluates a (possibly empty) list of values and returns a JSON array containing those values.

https://dev.mysql.com/doc/refman/8.0/en/json-creation-functions.html#function_json-array

func (JSONArray) FunctionName 

func (j JSONArray) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONArrayAppend 

type JSONArrayAppend struct {
	sql.Expression
}

JSON_ARRAY_APPEND(json_doc, path, val[, path, val] ...)

JSONArrayAppend Appends values to the end of the indicated arrays within a JSON document and returns the result. Returns NULL if any argument is NULL. An error occurs if the json_doc argument is not a valid JSON document or any path argument is not a valid path expression or contains a * or ** wildcard. The path-value pairs are evaluated left to right. The document produced by evaluating one pair becomes the new value against which the next pair is evaluated. If a path selects a scalar or object value, that value is autowrapped within an array and the new value is added to that array. Pairs for which the path does not identify any value in the JSON document are ignored.

https://dev.mysql.com/doc/refman/8.0/en/json-modification-functions.html#function_json-array-append

func (JSONArrayAppend) FunctionName 

func (j JSONArrayAppend) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONArrayInsert 

type JSONArrayInsert struct {
	sql.Expression
}

JSON_ARRAY_INSERT(json_doc, path, val[, path, val] ...)

JSONArrayInsert Updates a JSON document, inserting into an array within the document and returning the modified document. Returns NULL if any argument is NULL. An error occurs if the json_doc argument is not a valid JSON document or any path argument is not a valid path expression or contains a * or ** wildcard or does not end with an array element identifier. The path-value pairs are evaluated left to right. The document produced by evaluating one pair becomes the new value against which the next pair is evaluated. Pairs for which the path does not identify any array in the JSON document are ignored. If a path identifies an array element, the corresponding value is inserted at that element position, shifting any following values to the right. If a path identifies an array position past the end of an array, the value is inserted at the end of the array.

https://dev.mysql.com/doc/refman/8.0/en/json-modification-functions.html#function_json-array-insert

func (JSONArrayInsert) FunctionName 

func (j JSONArrayInsert) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONContains 

type JSONContains struct {
	JSONTarget    sql.Expression
	JSONCandidate sql.Expression
	Path          sql.Expression
}

JSON_CONTAINS(target, candidate[, path])

JSONContains indicates by returning 1 or 0 whether a given candidate JSON document is contained within a target JSON document, or, if a path argument was supplied, whether the candidate is found at a specific path within the target. Returns NULL if any argument is NULL, or if the path argument does not identify a section of the target document. An error occurs if target or candidate is not a valid JSON document, or if the path argument is not a valid path expression or contains a * or ** wildcard. To check only whether any data exists at the path, use JSON_CONTAINS_PATH() instead.

The following rules define containment:

  • A candidate scalar is contained in a target scalar if and only if they are comparable and are equal. Two scalar values are comparable if they have the same JSON_TYPE() types, with the exception that values of types INTEGER and DECIMAL are also comparable to each other.
  • A candidate array is contained in a target array if and only if every element in the candidate is contained in some element of the target.
  • A candidate non-array is contained in a target array if and only if the candidate is contained in some element of the target.

/ - A candidate object is contained in a target object if and only if for each key in the candidate there is a key 

with the same name in the target and the value associated with the candidate key is contained in the value
associated with the target key.

Otherwise, the candidate value is not contained in the target document.

https://dev.mysql.com/doc/refman/8.0/en/json-search-functions.html#function_json-contains TODO: Add multi index optimization -> https://dev.mysql.com/doc/refman/8.0/en/create-index.html#create-index-multi-valued

func (*JSONContains) Children 

func (j *JSONContains) Children() []sql.Expression

func (*JSONContains) Eval 

func (j *JSONContains) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (*JSONContains) FunctionName 

func (j *JSONContains) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*JSONContains) IsNullable 

func (j *JSONContains) IsNullable() bool

func (*JSONContains) Resolved 

func (j *JSONContains) Resolved() bool

func (*JSONContains) String 

func (j *JSONContains) String() string

func (*JSONContains) Type 

func (j *JSONContains) Type() sql.Type

func (*JSONContains) WithChildren 

func (j *JSONContains) WithChildren(children ...sql.Expression) (sql.Expression, error)

type JSONContainsPath 

type JSONContainsPath struct {
	sql.Expression
}

JSON_CONTAINS_PATH(json_doc, one_or_all, path[, path] ...)

JSONContainsPath Returns 0 or 1 to indicate whether a JSON document contains data at a given path or paths. Returns NULL if any argument is NULL. An error occurs if the json_doc argument is not a valid JSON document, any path argument is not a valid path expression, or one_or_all is not 'one' or 'all'. To check for a specific value at a path, use JSON_CONTAINS() instead.

The return value is 0 if no specified path exists within the document. Otherwise, the return value depends on the one_or_all argument:

  • 'one': 1 if at least one path exists within the document, 0 otherwise.
  • 'all': 1 if all paths exist within the document, 0 otherwise.

https://dev.mysql.com/doc/refman/8.0/en/json-search-functions.html#function_json-contains-path

func (JSONContainsPath) FunctionName 

func (j JSONContainsPath) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONDepth 

type JSONDepth struct {
	sql.Expression
}

JSON_DEPTH(json_doc)

JSONDepth Returns the maximum depth of a JSON document. Returns NULL if the argument is NULL. An error occurs if the argument is not a valid JSON document. An empty array, empty object, or scalar value has depth 1. A nonempty array containing only elements of depth 1 or nonempty object containing only member values of depth 1 has depth 2. Otherwise, a JSON document has depth greater than 2.

https://dev.mysql.com/doc/refman/8.0/en/json-attribute-functions.html#function_json-depth

func (JSONDepth) FunctionName 

func (j JSONDepth) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONExtract 

type JSONExtract struct {
	JSON  sql.Expression
	Paths []sql.Expression
}

JSON_EXTRACT(json_doc, path[, path] ...)

JSONExtract extracts data from a json document using json paths. https://dev.mysql.com/doc/refman/8.0/en/json-search-functions.html#function_json-extract

func (*JSONExtract) Children 

func (j *JSONExtract) Children() []sql.Expression

Children implements the sql.Expression interface.

func (*JSONExtract) Eval 

func (j *JSONExtract) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface.

func (*JSONExtract) FunctionName 

func (j *JSONExtract) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*JSONExtract) IsNullable 

func (j *JSONExtract) IsNullable() bool

IsNullable implements the sql.Expression interface.

func (*JSONExtract) Resolved 

func (j *JSONExtract) Resolved() bool

Resolved implements the sql.Expression interface.

func (*JSONExtract) String 

func (j *JSONExtract) String() string

func (*JSONExtract) Type 

func (j *JSONExtract) Type() sql.Type

Type implements the sql.Expression interface.

func (*JSONExtract) WithChildren 

func (j *JSONExtract) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type JSONInsert 

type JSONInsert struct {
	sql.Expression
}

JSON_INSERT(json_doc, path, val[, path, val] ...)

JSONInsert Inserts data into a JSON document and returns the result. Returns NULL if any argument is NULL. An error occurs if the json_doc argument is not a valid JSON document or any path argument is not a valid path expression or contains a * or ** wildcard. The path-value pairs are evaluated left to right. The document produced by evaluating one pair becomes the new value against which the next pair is evaluated. A path-value pair for an existing path in the document is ignored and does not overwrite the existing document value. A path-value pair for a nonexisting path in the document adds the value to the document if the path identifies one of these types of values:

  • A member not present in an existing object. The member is added to the object and associated with the new value.
  • A position past the end of an existing array. The array is extended with the new value. If the existing value is not an array, it is autowrapped as an array, then extended with the new value.

Otherwise, a path-value pair for a nonexisting path in the document is ignored and has no effect.

https://dev.mysql.com/doc/refman/8.0/en/json-modification-functions.html#function_json-insert

func (JSONInsert) FunctionName 

func (j JSONInsert) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONKeys 

type JSONKeys struct {
	sql.Expression
}

JSON_KEYS(json_doc[, path])

JSONKeys Returns the keys from the top-level value of a JSON object as a JSON array, or, if a path argument is given, the top-level keys from the selected path. Returns NULL if any argument is NULL, the json_doc argument is not an object, or path, if given, does not locate an object. An error occurs if the json_doc argument is not a valid JSON document or the path argument is not a valid path expression or contains a * or ** wildcard. The result array is empty if the selected object is empty. If the top-level value has nested subobjects, the return value does not include keys from those subobjects.

https://dev.mysql.com/doc/refman/8.0/en/json-search-functions.html#function_json-keys

func (JSONKeys) FunctionName 

func (j JSONKeys) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONLength 

type JSONLength struct {
	sql.Expression
}

JSON_LENGTH(json_doc[, path])

JSONLength Returns the length of a JSON document, or, if a path argument is given, the length of the value within the document identified by the path. Returns NULL if any argument is NULL or the path argument does not identify a value in the document. An error occurs if the json_doc argument is not a valid JSON document or the path argument is not a valid path expression or contains a * or ** wildcard. The length of a document is determined as follows:

  • The length of a scalar is 1.
  • The length of an array is the number of array elements.
  • The length of an object is the number of object members.
  • The length does not count the length of nested arrays or objects.

https://dev.mysql.com/doc/refman/8.0/en/json-attribute-functions.html#function_json-length

func (JSONLength) FunctionName 

func (j JSONLength) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONMerge 

type JSONMerge struct {
	sql.Expression
}

JSON_MERGE(json_doc, json_doc[, json_doc] ...)

JSONMerge Merges two or more JSON documents. Synonym for JSONMergePreserve(); deprecated in MySQL 8.0.3 and subject to removal in a future release.

https://dev.mysql.com/doc/refman/8.0/en/json-modification-functions.html#function_json-merge

type JSONMergePatch 

type JSONMergePatch struct {
	sql.Expression
}

JSON_MERGE_PATCH(json_doc, json_doc[, json_doc] ...)

JSONMergePatch Performs an RFC 7396 compliant merge of two or more JSON documents and returns the merged result, without preserving members having duplicate keys. Raises an error if at least one of the documents passed as arguments to this function is not valid. JSONMergePatch performs a merge as follows:

  • If the first argument is not an object, the result of the merge is the same as if an empty object had been merged with the second argument.
  • If the second argument is not an object, the result of the merge is the second argument.
  • If both arguments are objects, the result of the merge is an object with the following members:
  • All members of the first object which do not have a corresponding member with the same key in the second object.
  • All members of the second object which do not have a corresponding key in the first object, and whose value is not the JSON null literal.
  • All members with a key that exists in both the first and the second object, and whose value in the second object is not the JSON null literal. The values of these members are the results of recursively merging the value in the first object with the value in the second object.

The behavior of JSONMergePatch is the same as that of JSONMergePreserve, with the following two exceptions:

  • JSONMergePatch removes any member in the first object with a matching key in the second object, provided that the value associated with the key in the second object is not JSON null.
  • If the second object has a member with a key matching a member in the first object, JSONMergePatch replaces the value in the first object with the value in the second object, whereas JSONMergePreserve appends the second value to the first value.

https://dev.mysql.com/doc/refman/8.0/en/json-modification-functions.html#function_json-merge-patch

func (JSONMergePatch) FunctionName 

func (j JSONMergePatch) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONMergePreserve 

type JSONMergePreserve struct {
	sql.Expression
}

JSON_MERGE_PRESERVE(json_doc, json_doc[, json_doc] ...)

JSONMergePreserve Merges two or more JSON documents and returns the merged result. Returns NULL if any argument is NULL. An error occurs if any argument is not a valid JSON document. Merging takes place according to the following rules:

  • Adjacent arrays are merged to a single array.
  • Adjacent objects are merged to a single object.
  • A scalar value is autowrapped as an array and merged as an array.
  • An adjacent array and object are merged by autowrapping the object as an array and merging the two arrays.

This function was added in MySQL 8.0.3 as a synonym for JSONMerge. The JSONMerge function is now deprecated, and is subject to removal in a future release of MySQL.

The behavior of JSONMergePatch is the same as that of JSONMergePreserve, with the following two exceptions:

  • JSONMergePatch removes any member in the first object with a matching key in the second object, provided that the value associated with the key in the second object is not JSON null.
  • If the second object has a member with a key matching a member in the first object, JSONMergePatch replaces the value in the first object with the value in the second object, whereas JSONMergePreserve appends the second value to the first value.

https://dev.mysql.com/doc/refman/8.0/en/json-modification-functions.html#function_json-merge-preserve

func (JSONMergePreserve) FunctionName 

func (j JSONMergePreserve) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONObject 

type JSONObject struct {
	// contains filtered or unexported fields
}

JSON_OBJECT([key, val[, key, val] ...])

JSONObject Evaluates a (possibly empty) list of key-value pairs and returns a JSON object containing those pairs. An error occurs if any key name is NULL or the number of arguments is odd.

https://dev.mysql.com/doc/refman/8.0/en/json-creation-functions.html#function_json-object

func (JSONObject) Children 

func (j JSONObject) Children() []sql.Expression

func (JSONObject) Eval 

func (j JSONObject) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (JSONObject) FunctionName 

func (j JSONObject) FunctionName() string

FunctionName implements sql.FunctionExpression

func (JSONObject) IsNullable 

func (j JSONObject) IsNullable() bool

func (JSONObject) Resolved 

func (j JSONObject) Resolved() bool

func (JSONObject) String 

func (j JSONObject) String() string

func (JSONObject) Type 

func (j JSONObject) Type() sql.Type

func (JSONObject) WithChildren 

func (j JSONObject) WithChildren(children ...sql.Expression) (sql.Expression, error)

type JSONOverlaps 

type JSONOverlaps struct {
	sql.Expression
}

JSON_OVERLAPS(json_doc1, json_doc2)

JSONOverlaps Compares two JSON documents. Returns true (1) if the two document have any key-value pairs or array elements in common. If both arguments are scalars, the function performs a simple equality test.

This function serves as counterpart to JSON_CONTAINS(), which requires all elements of the array searched for to be present in the array searched in. Thus, JSON_CONTAINS() performs an AND operation on search keys, while JSON_OVERLAPS() performs an OR operation.

Queries on JSON columns of InnoDB tables using JSON_OVERLAPS() in the WHERE clause can be optimized using multi-valued indexes. Multi-Valued Indexes, provides detailed information and examples.

https://dev.mysql.com/doc/refman/8.0/en/json-search-functions.html#function_json-overlaps

func (JSONOverlaps) FunctionName 

func (j JSONOverlaps) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONPretty 

type JSONPretty struct {
	sql.Expression
}

JSON_PRETTY(json_val)

JSONPretty Provides pretty-printing of JSON values similar to that implemented in PHP and by other languages and database systems. The value supplied must be a JSON value or a valid string representation of a JSON value. Extraneous whitespaces and newlines present in this value have no effect on the output. For a NULL value, the function returns NULL. If the value is not a JSON document, or if it cannot be parsed as one, the function fails with an error. Formatting of the output from this function adheres to the following rules:

  • Each array element or object member appears on a separate line, indented by one additional level as compared to its parent.
  • Each level of indentation adds two leading spaces.
  • A comma separating individual array elements or object members is printed before the newline that separates the two elements or members.
  • The key and the value of an object member are separated by a colon followed by a space (': ').
  • An empty object or array is printed on a single line. No space is printed between the opening and closing brace.
  • Special characters in string scalars and key names are escaped employing the same rules used by JSONQuote.

https://dev.mysql.com/doc/refman/8.0/en/json-utility-functions.html#function_json-pretty

func (JSONPretty) FunctionName 

func (j JSONPretty) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONQuote 

type JSONQuote struct {
	sql.Expression
}

JSON_QUOTE(string)

JSONQuote Quotes a string as a JSON value by wrapping it with double quote characters and escaping interior quote and other characters, then returning the result as a utf8mb4 string. Returns NULL if the argument is NULL. This function is typically used to produce a valid JSON string literal for inclusion within a JSON document. Certain special characters are escaped with backslashes per the escape sequences shown in Table 12.23, “JSON_UNQUOTE() Special Character Escape Sequences”: https://dev.mysql.com/doc/refman/8.0/en/json-modification-functions.html#json-unquote-character-escape-sequences

https://dev.mysql.com/doc/refman/8.0/en/json-creation-functions.html#function_json-quote

func (JSONQuote) FunctionName 

func (j JSONQuote) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONRemove 

type JSONRemove struct {
	sql.Expression
}

JSON_REMOVE(json_doc, path[, path] ...)

JSONRemove Removes data from a JSON document and returns the result. Returns NULL if any argument is NULL. An error occurs if the json_doc argument is not a valid JSON document or any path argument is not a valid path expression or is $ or contains a * or ** wildcard. The path arguments are evaluated left to right. The document produced by evaluating one path becomes the new value against which the next path is evaluated. It is not an error if the element to be removed does not exist in the document; in that case, the path does not affect the document.

https://dev.mysql.com/doc/refman/8.0/en/json-modification-functions.html#function_json-remove

func (JSONRemove) FunctionName 

func (j JSONRemove) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONReplace 

type JSONReplace struct {
	sql.Expression
}

JSON_REPLACE(json_doc, path, val[, path, val] ...)

JSONReplace Replaces existing values in a JSON document and returns the result. Returns NULL if any argument is NULL. An error occurs if the json_doc argument is not a valid JSON document or any path argument is not a valid path expression or contains a * or ** wildcard. The path-value pairs are evaluated left to right. The document produced by evaluating one pair becomes the new value against which the next pair is evaluated. A path-value pair for an existing path in the document overwrites the existing document value with the new value. A path-value pair for a non-existing path in the document is ignored and has no effect.

https://dev.mysql.com/doc/refman/8.0/en/json-modification-functions.html#function_json-replace

func (JSONReplace) FunctionName 

func (j JSONReplace) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONSchemaValid 

type JSONSchemaValid struct {
	sql.Expression
}

JSON_SCHEMA_VALID(schema,document)

JSONSchemaValid Validates a JSON document against a JSON schema. Both schema and document are required. The schema must be a valid JSON object; the document must be a valid JSON document. Provided that these conditions are met: If the document validates against the schema, the function returns true (1); otherwise, it returns false (0). https://dev.mysql.com/doc/refman/8.0/en/json-validation-functions.html#function_json-schema-valid

func (JSONSchemaValid) FunctionName 

func (j JSONSchemaValid) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONSchemaValidationReport 

type JSONSchemaValidationReport struct {
	sql.Expression
}

JSON_SCHEMA_VALIDATION_REPORT(schema,document)

JSONSchemaValidationReport Validates a JSON document against a JSON schema. Both schema and document are required. As with JSONSchemaValid, the schema must be a valid JSON object, and the document must be a valid JSON document. Provided that these conditions are met, the function returns a report, as a JSON document, on the outcome of the validation. If the JSON document is considered valid according to the JSON Schema, the function returns a JSON object with one property valid having the value "true". If the JSON document fails validation, the function returns a JSON object which includes the properties listed here:

  • valid: Always "false" for a failed schema validation
  • reason: A human-readable string containing the reason for the failure
  • schema-location: A JSON pointer URI fragment identifier indicating where in the JSON schema the validation failed (see Note following this list)
  • document-location: A JSON pointer URI fragment identifier indicating where in the JSON document the validation failed (see Note following this list)
  • schema-failed-keyword: A string containing the name of the keyword or property in the JSON schema that was violated

https://dev.mysql.com/doc/refman/8.0/en/json-validation-functions.html#function_json-schema-validation-report

func (JSONSchemaValidationReport) FunctionName 

func (j JSONSchemaValidationReport) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONSearch 

type JSONSearch struct {
	sql.Expression
}

JSON_SEARCH(json_doc, one_or_all, search_str[, escape_char[, path] ...])

JSONSearch Returns the path to the given string within a JSON document. Returns NULL if any of the json_doc, search_str, or path arguments are NULL; no path exists within the document; or search_str is not found. An error occurs if the json_doc argument is not a valid JSON document, any path argument is not a valid path expression, one_or_all is not 'one' or 'all', or escape_char is not a constant expression. The one_or_all argument affects the search as follows:

  • 'one': The search terminates after the first match and returns one path string. It is undefined which match is considered first.
  • 'all': The search returns all matching path strings such that no duplicate paths are included. If there are multiple strings, they are autowrapped as an array. The order of the array elements is undefined.

Within the search_str search string argument, the % and _ characters work as for the LIKE operator: % matches any number of characters (including zero characters), and _ matches exactly one character.

To specify a literal % or _ character in the search string, precede it by the escape character. The default is \ if the escape_char argument is missing or NULL. Otherwise, escape_char must be a constant that is empty or one character. For more information about matching and escape character behavior, see the description of LIKE in Section 12.8.1, “String Comparison Functions and Operators”: https://dev.mysql.com/doc/refman/8.0/en/string-comparison-functions.html For escape character handling, a difference from the LIKE behavior is that the escape character for JSON_SEARCH() must evaluate to a constant at compile time, not just at execution time. For example, if JSON_SEARCH() is used in a prepared statement and the escape_char argument is supplied using a ? parameter, the parameter value might be constant at execution time, but is not at compile time.

https://dev.mysql.com/doc/refman/8.0/en/json-search-functions.html#function_json-search

func (JSONSearch) FunctionName 

func (j JSONSearch) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONSet 

type JSONSet struct {
	sql.Expression
}

JSON_SET(json_doc, path, val[, path, val] ...)

JSONSet Inserts or updates data in a JSON document and returns the result. Returns NULL if any argument is NULL or path, if given, does not locate an object. An error occurs if the json_doc argument is not a valid JSON document or any path argument is not a valid path expression or contains a * or ** wildcard. The path-value pairs are evaluated left to right. The document produced by evaluating one pair becomes the new value against which the next pair is evaluated. A path-value pair for an existing path in the document overwrites the existing document value with the new value. A path-value pair for a non-existing path in the document adds the value to the document if the path identifies one of these types of values:

  • A member not present in an existing object. The member is added to the object and associated with the new value.
  • A position past the end of an existing array. The array is extended with the new value. If the existing value is not an array, it is auto-wrapped as an array, then extended with the new value.

Otherwise, a path-value pair for a non-existing path in the document is ignored and has no effect.

https://dev.mysql.com/doc/refman/8.0/en/json-modification-functions.html#function_json-set

func (JSONSet) FunctionName 

func (j JSONSet) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONStorageFree 

type JSONStorageFree struct {
	sql.Expression
}

JSON_STORAGE_FREE(json_val)

JSONStorageFree For a JSON column value, this function shows how much storage space was freed in its binary representation after it was updated in place using JSON_SET(), JSON_REPLACE(), or JSON_REMOVE(). The argument can also be a valid JSON document or a string which can be parsed as one—either as a literal value or as the value of a user variable—in which case the function returns 0. It returns a positive, nonzero value if the argument is a JSON column value which has been updated as described previously, such that its binary representation takes up less space than it did prior to the update. For a JSON column which has been updated such that its binary representation is the same as or larger than before, or if the update was not able to take advantage of a partial update, it returns 0; it returns NULL if the argument is NULL. If json_val is not NULL, and neither is a valid JSON document nor can be successfully parsed as one, an error results.

https://dev.mysql.com/doc/refman/8.0/en/json-utility-functions.html#function_json-storage-size

func (JSONStorageFree) FunctionName 

func (j JSONStorageFree) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONStorageSize 

type JSONStorageSize struct {
	sql.Expression
}

JSON_STORAGE_SIZE(json_val)

JSONStorageSize This function returns the number of bytes used to store the binary representation of a JSON document. When the argument is a JSON column, this is the space used to store the JSON document as it was inserted into the column, prior to any partial updates that may have been performed on it afterwards. json_val must be a valid JSON document or a string which can be parsed as one. In the case where it is string, the function returns the amount of storage space in the JSON binary representation that is created by parsing the string as JSON and converting it to binary. It returns NULL if the argument is NULL. An error results when json_val is not NULL, and is not—or cannot be successfully parsed as—a JSON document.

https://dev.mysql.com/doc/refman/8.0/en/json-utility-functions.html#function_json-storage-size

func (JSONStorageSize) FunctionName 

func (j JSONStorageSize) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONTable 

type JSONTable struct {
	sql.Expression
}

JSON_TABLE(expr, path COLUMNS (column_list) [AS] alias)

JSONTable Extracts data from a JSON document and returns it as a relational table having the specified columns. TODO(andy): this doc was heavily truncated

https://dev.mysql.com/doc/refman/8.0/en/json-table-functions.html#function_json-table

func (JSONTable) FunctionName 

func (j JSONTable) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONType 

type JSONType struct {
	sql.Expression
}

JSON_TYPE(json_val)

Returns a utf8mb4 string indicating the type of a JSON value. This can be an object, an array, or a scalar type. JSONType returns NULL if the argument is NULL. An error occurs if the argument is not a valid JSON value

https://dev.mysql.com/doc/refman/8.0/en/json-attribute-functions.html#function_json-type

func (JSONType) FunctionName 

func (j JSONType) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONUnquote 

type JSONUnquote struct {
	expression.UnaryExpression
}

JSONUnquote unquotes JSON value and returns the result as a utf8mb4 string. Returns NULL if the argument is NULL. An error occurs if the value starts and ends with double quotes but is not a valid JSON string literal.

func (*JSONUnquote) Eval 

func (js *JSONUnquote) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*JSONUnquote) FunctionName 

func (js *JSONUnquote) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*JSONUnquote) String 

func (js *JSONUnquote) String() string

func (*JSONUnquote) Type 

func (*JSONUnquote) Type() sql.Type

Type implements the Expression interface.

func (*JSONUnquote) WithChildren 

func (js *JSONUnquote) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type JSONValid 

type JSONValid struct {
	sql.Expression
}

JSON_VALID(val)

Returns 0 or 1 to indicate whether a value is valid JSON. Returns NULL if the argument is NULL.

https://dev.mysql.com/doc/refman/8.0/en/json-attribute-functions.html#function_json-valid

func (JSONValid) FunctionName 

func (j JSONValid) FunctionName() string

FunctionName implements sql.FunctionExpression

type JSONValue 

type JSONValue struct {
	sql.Expression
}

JSON_VALUE(json_doc, path)

JSONValue Extracts a value from a JSON document at the path given in the specified document, and returns the extracted value, optionally converting it to a desired type.

https://dev.mysql.com/doc/refman/8.0/en/json-search-functions.html#function_json-value

func (JSONValue) FunctionName 

func (j JSONValue) FunctionName() string

FunctionName implements sql.FunctionExpression

type LastInsertId 

type LastInsertId struct{}

LastInsertId implements the LAST_INSERT_ID() function

func (LastInsertId) Children 

func (r LastInsertId) Children() []sql.Expression

Children implements sql.Expression

func (LastInsertId) Eval 

func (r LastInsertId) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (LastInsertId) FunctionName 

func (r LastInsertId) FunctionName() string

FunctionName implements sql.FunctionExpression

func (LastInsertId) IsNullable 

func (r LastInsertId) IsNullable() bool

IsNullable implements sql.Expression

func (LastInsertId) Resolved 

func (r LastInsertId) Resolved() bool

Resolved implements sql.Expression

func (LastInsertId) String 

func (r LastInsertId) String() string

String implements sql.Expression

func (LastInsertId) Type 

func (r LastInsertId) Type() sql.Type

Type implements sql.Expression

func (LastInsertId) WithChildren 

func (r LastInsertId) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type Least 

type Least struct {
	Args []sql.Expression
	// contains filtered or unexported fields
}

Least returns the argument with the least numerical or string value. It allows for numeric (ints anf floats) and string arguments and will return the used type when all arguments are of the same type or floats if there are numerically convertible strings or integers mixed with floats. When ints or floats are mixed with non numerically convertible strings, those are ignored.

func (*Least) Children 

func (f *Least) Children() []sql.Expression

Children implements the Expression interface.

func (*Least) Eval 

func (f *Least) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Least) FunctionName 

func (f *Least) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Least) IsNullable 

func (f *Least) IsNullable() bool

IsNullable implements the Expression interface.

func (*Least) Resolved 

func (f *Least) Resolved() bool

Resolved implements the Expression interface.

func (*Least) String 

func (f *Least) String() string

func (*Least) Type 

func (f *Least) Type() sql.Type

Type implements the Expression interface.

func (*Least) WithChildren 

func (f *Least) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Left 

type Left struct {
	// contains filtered or unexported fields
}

Left is a function that returns the first N characters of a string expression.

func (Left) Children 

func (l Left) Children() []sql.Expression

Children implements the Expression interface.

func (Left) Eval 

func (l Left) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (Left) FunctionName 

func (l Left) FunctionName() string

FunctionName implements sql.FunctionExpression

func (Left) IsNullable 

func (l Left) IsNullable() bool

IsNullable implements the Expression interface.

func (Left) Resolved 

func (l Left) Resolved() bool

Resolved implements the Expression interface.

func (Left) String 

func (l Left) String() string

func (Left) Type 

func (Left) Type() sql.Type

Type implements the Expression interface.

func (Left) WithChildren 

func (l Left) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Length 

type Length struct {
	expression.UnaryExpression
	CountType CountType
}

Length returns the length of a string or binary content, either in bytes or characters.

func (*Length) DebugString 

func (l *Length) DebugString() string

func (*Length) Eval 

func (l *Length) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface.

func (*Length) FunctionName 

func (l *Length) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Length) String 

func (l *Length) String() string

func (*Length) Type 

func (l *Length) Type() sql.Type

Type implements the sql.Expression interface.

func (*Length) WithChildren 

func (l *Length) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type LoadFile 

type LoadFile struct {
	// contains filtered or unexported fields
}

func (*LoadFile) Children 

func (l *LoadFile) Children() []sql.Expression

Children implements sql.Expression.

func (*LoadFile) Eval 

func (l *LoadFile) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

TODO: Allow FILE privileges for GRANT Eval implements sql.Expression.

func (*LoadFile) FunctionName 

func (l *LoadFile) FunctionName() string

FunctionName implements sql.FunctionExpression.

func (*LoadFile) IsNullable 

func (l *LoadFile) IsNullable() bool

IsNullable implements sql.Expression.

func (*LoadFile) Resolved 

func (l *LoadFile) Resolved() bool

Resolved implements sql.Expression.

func (*LoadFile) String 

func (l *LoadFile) String() string

String implements sql.Expression.

func (*LoadFile) Type 

func (l *LoadFile) Type() sql.Type

Type implements sql.Expression.

func (*LoadFile) WithChildren 

func (l *LoadFile) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression.

type Log 

type Log struct {
	expression.BinaryExpression
}

Log is a function that returns the natural logarithm of a value.

func (*Log) Children 

func (l *Log) Children() []sql.Expression

Children implements the Expression interface.

func (*Log) Eval 

func (l *Log) Eval(
	ctx *sql.Context,
	row sql.Row,
) (interface{}, error)

Eval implements the Expression interface.

func (*Log) FunctionName 

func (l *Log) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Log) IsNullable 

func (l *Log) IsNullable() bool

IsNullable implements the Expression interface.

func (*Log) String 

func (l *Log) String() string

func (*Log) Type 

func (l *Log) Type() sql.Type

Type returns the resultant type of the function.

func (*Log) WithChildren 

func (l *Log) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type LogBase 

type LogBase struct {
	expression.UnaryExpression
	// contains filtered or unexported fields
}

LogBase is a function that returns the logarithm of a value with a specific base.

func (*LogBase) Eval 

func (l *LogBase) Eval(
	ctx *sql.Context,
	row sql.Row,
) (interface{}, error)

Eval implements the Expression interface.

func (*LogBase) FunctionName 

func (l *LogBase) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*LogBase) IsNullable 

func (l *LogBase) IsNullable() bool

IsNullable implements the sql.Expression interface.

func (*LogBase) String 

func (l *LogBase) String() string

func (*LogBase) Type 

func (l *LogBase) Type() sql.Type

Type returns the resultant type of the function.

func (*LogBase) WithChildren 

func (l *LogBase) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Lower 

type Lower struct {
	expression.UnaryExpression
}

Lower is a function that returns the lowercase of the text provided.

func (*Lower) Eval 

func (l *Lower) Eval(
	ctx *sql.Context,
	row sql.Row,
) (interface{}, error)

Eval implements the Expression interface.

func (*Lower) FunctionName 

func (l *Lower) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Lower) String 

func (l *Lower) String() string

func (*Lower) Type 

func (l *Lower) Type() sql.Type

Type implements the Expression interface.

func (*Lower) WithChildren 

func (l *Lower) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type MD5 

type MD5 struct {
	*UnaryFunc
}

MD5 function returns the MD5 hash of the input. https://dev.mysql.com/doc/refman/8.0/en/encryption-functions.html#function_md5

func (*MD5) Eval 

func (f *MD5) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*MD5) WithChildren 

func (f *MD5) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type Microsecond 

type Microsecond struct {
	*UnaryDatetimeFunc
}

Microsecond implements the MICROSECOND function

func (*Microsecond) Eval 

func (m *Microsecond) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (*Microsecond) WithChildren 

func (m *Microsecond) WithChildren(children ...sql.Expression) (sql.Expression, error)

type Minute 

type Minute struct {
	expression.UnaryExpression
}

Minute is a function that returns the minute of a date.

func (*Minute) Eval 

func (m *Minute) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Minute) FunctionName 

func (m *Minute) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Minute) String 

func (m *Minute) String() string

func (*Minute) Type 

func (m *Minute) Type() sql.Type

Type implements the Expression interface.

func (*Minute) WithChildren 

func (m *Minute) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Month 

type Month struct {
	expression.UnaryExpression
}

Month is a function that returns the month of a date.

func (*Month) Eval 

func (m *Month) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Month) FunctionName 

func (m *Month) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Month) String 

func (m *Month) String() string

func (*Month) Type 

func (m *Month) Type() sql.Type

Type implements the Expression interface.

func (*Month) WithChildren 

func (m *Month) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type MonthName 

type MonthName struct {
	*UnaryDatetimeFunc
}

MonthName implements the MONTHNAME function

func (*MonthName) Eval 

func (d *MonthName) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (*MonthName) WithChildren 

func (d *MonthName) WithChildren(children ...sql.Expression) (sql.Expression, error)

type NamedLockFunction 

type NamedLockFunction struct {
	expression.UnaryExpression
	// contains filtered or unexported fields
}

NamedLockFunction is a sql function that takes just the name of a lock as an argument

func (*NamedLockFunction) FunctionName 

func (nl *NamedLockFunction) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*NamedLockFunction) GetLockName 

func (nl *NamedLockFunction) GetLockName(ctx *sql.Context, row sql.Row) (*string, error)

Eval implements the Expression interface.

func (*NamedLockFunction) IsNullable 

func (nl *NamedLockFunction) IsNullable() bool

IsNullable implements the Expression interface.

func (*NamedLockFunction) String 

func (nl *NamedLockFunction) String() string

String implements the fmt.Stringer interface.

func (*NamedLockFunction) Type 

func (nl *NamedLockFunction) Type() sql.Type

Type implements the Expression interface.

type NoArgFunc 

type NoArgFunc struct {
	Name    string
	SQLType sql.Type
}

NoArgFunc is a helper type to reduce boilerplate in functions that take no arguments. Implements most of sql.FunctionExpression.

func (NoArgFunc) Children 

func (fn NoArgFunc) Children() []sql.Expression

Children implements the Expression interface.

func (NoArgFunc) FunctionName 

func (fn NoArgFunc) FunctionName() string

FunctionName implements sql.FunctionExpression

func (NoArgFunc) IsNullable 

func (fn NoArgFunc) IsNullable() bool

IsNullable implements the Expression interface.

func (NoArgFunc) Resolved 

func (fn NoArgFunc) Resolved() bool

Resolved implements the Expression interface.

func (NoArgFunc) String 

func (fn NoArgFunc) String() string

func (NoArgFunc) Type 

func (fn NoArgFunc) Type() sql.Type

Type implements the Expression interface.

type Now 

type Now struct {
	// contains filtered or unexported fields
}

Now is a function that returns the current time.

func (*Now) Children 

func (n *Now) Children() []sql.Expression

Children implements the sql.Expression interface.

func (*Now) Eval 

func (n *Now) Eval(ctx *sql.Context, _ sql.Row) (interface{}, error)

Eval implements the sql.Expression interface.

func (*Now) FunctionName 

func (n *Now) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Now) IsNullable 

func (n *Now) IsNullable() bool

IsNullable implements the sql.Expression interface.

func (*Now) Resolved 

func (n *Now) Resolved() bool

Resolved implements the sql.Expression interface.

func (*Now) String 

func (n *Now) String() string

func (*Now) Type 

func (n *Now) Type() sql.Type

Type implements the sql.Expression interface.

func (*Now) WithChildren 

func (n *Now) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type NullIf 

type NullIf struct {
	expression.BinaryExpression
}

NullIf function compares two expressions and returns NULL if they are equal. Otherwise, the first expression is returned.

func (*NullIf) Eval 

func (f *NullIf) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*NullIf) FunctionName 

func (f *NullIf) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*NullIf) IsNullable 

func (f *NullIf) IsNullable() bool

IsNullable implements the Expression interface.

func (*NullIf) String 

func (f *NullIf) String() string

func (*NullIf) Type 

func (f *NullIf) Type() sql.Type

Type implements the Expression interface.

func (*NullIf) WithChildren 

func (f *NullIf) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Pad 

type Pad struct {
	// contains filtered or unexported fields
}

Pad is a function that pads a string with another string.

func (*Pad) Children 

func (p *Pad) Children() []sql.Expression

Children implements the Expression interface.

func (*Pad) Eval 

func (p *Pad) Eval(
	ctx *sql.Context,
	row sql.Row,
) (interface{}, error)

Eval implements the Expression interface.

func (*Pad) FunctionName 

func (p *Pad) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Pad) IsNullable 

func (p *Pad) IsNullable() bool

IsNullable implements the Expression interface.

func (*Pad) Resolved 

func (p *Pad) Resolved() bool

Resolved implements the Expression interface.

func (*Pad) String 

func (p *Pad) String() string

func (*Pad) Type 

func (p *Pad) Type() sql.Type

Type implements the Expression interface.

func (*Pad) WithChildren 

func (p *Pad) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Power 

type Power struct {
	expression.BinaryExpression
}

Power is a function that returns value of X raised to the power of Y.

func (*Power) Eval 

func (p *Power) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Power) FunctionName 

func (p *Power) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Power) IsNullable 

func (p *Power) IsNullable() bool

IsNullable implements the Expression interface.

func (*Power) String 

func (p *Power) String() string

func (*Power) Type 

func (p *Power) Type() sql.Type

Type implements the Expression interface.

func (*Power) WithChildren 

func (p *Power) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Radians 

type Radians struct {
	*UnaryFunc
}

func (*Radians) Eval 

func (r *Radians) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*Radians) WithChildren 

func (r *Radians) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type Rand 

type Rand struct {
	Child sql.Expression
}

Rand returns a random float 0 <= x < 1. If it has an argument, that argument will be used to seed the random number generator, effectively turning it into a hash on that value.

func (*Rand) Children 

func (r *Rand) Children() []sql.Expression

Children implements sql.Expression

func (*Rand) Eval 

func (r *Rand) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression.

func (*Rand) FunctionName 

func (r *Rand) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Rand) IsNonDeterministic 

func (r *Rand) IsNonDeterministic() bool

IsNonDeterministic implements sql.NonDeterministicExpression

func (*Rand) IsNullable 

func (r *Rand) IsNullable() bool

IsNullable implements sql.Expression

func (*Rand) Resolved 

func (r *Rand) Resolved() bool

Resolved implements sql.Expression

func (*Rand) String 

func (r *Rand) String() string

func (*Rand) Type 

func (r *Rand) Type() sql.Type

Type implements sql.Expression.

func (*Rand) WithChildren 

func (r *Rand) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression.

type RegexpLike 

type RegexpLike struct {
	Text    sql.Expression
	Pattern sql.Expression
	Flags   sql.Expression
	// contains filtered or unexported fields
}

RegexpLike implements the REGEXP_LIKE function. https://dev.mysql.com/doc/refman/8.0/en/regexp.html#function_regexp-like

func (*RegexpLike) Children 

func (r *RegexpLike) Children() []sql.Expression

Children implements the sql.Expression interface.

func (*RegexpLike) Eval 

func (r *RegexpLike) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface.

func (*RegexpLike) FunctionName 

func (r *RegexpLike) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*RegexpLike) IsNullable 

func (r *RegexpLike) IsNullable() bool

IsNullable implements the sql.Expression interface.

func (*RegexpLike) Resolved 

func (r *RegexpLike) Resolved() bool

Resolved implements the sql.Expression interface.

func (*RegexpLike) String 

func (r *RegexpLike) String() string

func (*RegexpLike) Type 

func (r *RegexpLike) Type() sql.Type

Type implements the sql.Expression interface.

func (*RegexpLike) WithChildren 

func (r *RegexpLike) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the sql.Expression interface.

type Registry 

type Registry map[string]sql.Function

Registry is used to register functions

func NewRegistry 

func NewRegistry() Registry

NewRegistry creates a new Registry.

func (Registry) Function 

func (r Registry) Function(name string) (sql.Function, error)

Function implements sql.FunctionProvider

func (Registry) Register 

func (r Registry) Register(fn ...sql.Function) error

Register registers functions, returning an error if it's already registered

type ReleaseAllLocks 

type ReleaseAllLocks struct {
	NoArgFunc
	// contains filtered or unexported fields
}

func (ReleaseAllLocks) Eval 

func (r ReleaseAllLocks) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (ReleaseAllLocks) WithChildren 

func (r ReleaseAllLocks) WithChildren(children ...sql.Expression) (sql.Expression, error)

type ReleaseLock 

type ReleaseLock struct {
	NamedLockFunction
}

func (*ReleaseLock) Eval 

func (i *ReleaseLock) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (*ReleaseLock) WithChildren 

func (i *ReleaseLock) WithChildren(children ...sql.Expression) (sql.Expression, error)

type Repeat 

type Repeat struct {
	expression.BinaryExpression
}

Repeat is a function that returns the string repeated n times.

func (*Repeat) Eval 

func (r *Repeat) Eval(
	ctx *sql.Context,
	row sql.Row,
) (interface{}, error)

Eval implements the Expression interface.

func (*Repeat) FunctionName 

func (r *Repeat) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Repeat) String 

func (r *Repeat) String() string

func (*Repeat) Type 

func (r *Repeat) Type() sql.Type

Type implements the Expression interface.

func (*Repeat) WithChildren 

func (r *Repeat) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Replace 

type Replace struct {
	// contains filtered or unexported fields
}

Replace is a function that returns a string with all occurrences of fromStr replaced by the string toStr

func (*Replace) Children 

func (r *Replace) Children() []sql.Expression

Children implements the Expression interface.

func (*Replace) Eval 

func (r *Replace) Eval(
	ctx *sql.Context,
	row sql.Row,
) (interface{}, error)

Eval implements the Expression interface.

func (*Replace) FunctionName 

func (r *Replace) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Replace) IsNullable 

func (r *Replace) IsNullable() bool

IsNullable implements the Expression interface.

func (*Replace) Resolved 

func (r *Replace) Resolved() bool

Resolved implements the Expression interface.

func (*Replace) String 

func (r *Replace) String() string

func (*Replace) Type 

func (r *Replace) Type() sql.Type

Type implements the Expression interface.

func (*Replace) WithChildren 

func (r *Replace) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Reverse 

type Reverse struct {
	expression.UnaryExpression
}

Reverse is a function that returns the reverse of the text provided.

func (*Reverse) Eval 

func (r *Reverse) Eval(
	ctx *sql.Context,
	row sql.Row,
) (interface{}, error)

Eval implements the Expression interface.

func (*Reverse) FunctionName 

func (r *Reverse) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Reverse) String 

func (r *Reverse) String() string

func (*Reverse) Type 

func (r *Reverse) Type() sql.Type

Type implements the Expression interface.

func (*Reverse) WithChildren 

func (r *Reverse) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Round 

type Round struct {
	expression.BinaryExpression
}

Round returns the number (x) with (d) requested decimal places. If d is negative, the number is returned with the (abs(d)) least significant digits of it's integer part set to 0. If d is not specified or nil/null it defaults to 0.

func (*Round) Children 

func (r *Round) Children() []sql.Expression

Children implements the Expression interface.

func (*Round) Eval 

func (r *Round) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Round) FunctionName 

func (r *Round) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Round) IsNullable 

func (r *Round) IsNullable() bool

IsNullable implements the Expression interface.

func (*Round) Resolved 

func (r *Round) Resolved() bool

Resolved implements the Expression interface.

func (*Round) String 

func (r *Round) String() string

func (*Round) Type 

func (r *Round) Type() sql.Type

Type implements the Expression interface.

func (*Round) WithChildren 

func (r *Round) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type RowCount 

type RowCount struct{}

RowCount implements the ROW_COUNT() function

func (RowCount) Children 

func (r RowCount) Children() []sql.Expression

Children implements sql.Expression

func (RowCount) Eval 

func (r RowCount) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (RowCount) FunctionName 

func (r RowCount) FunctionName() string

FunctionName implements sql.FunctionExpression

func (RowCount) IsNullable 

func (r RowCount) IsNullable() bool

IsNullable implements sql.Expression

func (RowCount) Resolved 

func (r RowCount) Resolved() bool

Resolved implements sql.Expression

func (RowCount) String 

func (r RowCount) String() string

String implements sql.Expression

func (RowCount) Type 

func (r RowCount) Type() sql.Type

Type implements sql.Expression

func (RowCount) WithChildren 

func (r RowCount) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type SHA1 

type SHA1 struct {
	*UnaryFunc
}

SHA1 function returns the SHA1 hash of the input. https://dev.mysql.com/doc/refman/8.0/en/encryption-functions.html#function_sha1

func (*SHA1) Eval 

func (f *SHA1) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*SHA1) WithChildren 

func (f *SHA1) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type SHA2 

type SHA2 struct {
	expression.BinaryExpression
}

SHA2 function returns the SHA-224/256/384/512 hash of the input. https://dev.mysql.com/doc/refman/8.0/en/encryption-functions.html#function_sha2

func (*SHA2) Eval 

func (f *SHA2) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*SHA2) FunctionName 

func (f *SHA2) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*SHA2) String 

func (f *SHA2) String() string

String implements sql.Expression

func (*SHA2) Type 

func (f *SHA2) Type() sql.Type

Type implements sql.Expression

func (*SHA2) WithChildren 

func (f *SHA2) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type Second 

type Second struct {
	expression.UnaryExpression
}

Second is a function that returns the second of a date.

func (*Second) Eval 

func (s *Second) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Second) FunctionName 

func (s *Second) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Second) String 

func (s *Second) String() string

func (*Second) Type 

func (s *Second) Type() sql.Type

Type implements the Expression interface.

func (*Second) WithChildren 

func (s *Second) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Sign 

type Sign struct {
	*UnaryFunc
}

func (*Sign) Eval 

func (s *Sign) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*Sign) WithChildren 

func (s *Sign) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type Sin 

type Sin struct {
	*UnaryFunc
}

Sin is the SIN function

func (*Sin) Eval 

func (s *Sin) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*Sin) WithChildren 

func (s *Sin) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type Sleep 

type Sleep struct {
	expression.UnaryExpression
}

Sleep is a function that just waits for the specified number of seconds and returns 0. It can be useful to test timeouts or long queries.

func (*Sleep) Eval 

func (s *Sleep) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Sleep) FunctionName 

func (s *Sleep) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Sleep) IsNullable 

func (s *Sleep) IsNullable() bool

IsNullable implements the Expression interface.

func (*Sleep) String 

func (s *Sleep) String() string

String implements the fmt.Stringer interface.

func (*Sleep) Type 

func (s *Sleep) Type() sql.Type

Type implements the Expression interface.

func (*Sleep) WithChildren 

func (s *Sleep) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Soundex 

type Soundex struct {
	expression.UnaryExpression
}

Soundex is a function that returns the soundex of a string. Two strings that sound almost the same should have identical soundex strings. A standard soundex string is four characters long, but the SOUNDEX() function returns an arbitrarily long string.

func (*Soundex) Eval 

func (s *Soundex) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Soundex) FunctionName 

func (s *Soundex) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Soundex) String 

func (s *Soundex) String() string

func (*Soundex) Type 

func (s *Soundex) Type() sql.Type

Type implements the Expression interface.

func (*Soundex) WithChildren 

func (s *Soundex) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Split 

type Split struct {
	expression.BinaryExpression
}

Split receives a string and returns the parts of it splitted by a delimiter.

func (*Split) Eval 

func (f *Split) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Split) FunctionName 

func (f *Split) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Split) IsNullable 

func (f *Split) IsNullable() bool

IsNullable implements the Expression interface.

func (*Split) String 

func (f *Split) String() string

func (*Split) Type 

func (*Split) Type() sql.Type

Type implements the Expression interface.

func (*Split) WithChildren 

func (f *Split) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Sqrt 

type Sqrt struct {
	expression.UnaryExpression
}

Sqrt is a function that returns the square value of the number provided.

func (*Sqrt) Eval 

func (s *Sqrt) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Sqrt) FunctionName 

func (s *Sqrt) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Sqrt) IsNullable 

func (s *Sqrt) IsNullable() bool

IsNullable implements the Expression interface.

func (*Sqrt) String 

func (s *Sqrt) String() string

func (*Sqrt) Type 

func (s *Sqrt) Type() sql.Type

Type implements the Expression interface.

func (*Sqrt) WithChildren 

func (s *Sqrt) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type StringToDatetime 

type StringToDatetime struct {
	Date   sql.Expression
	Format sql.Expression
}

StringToDatetime defines the built-in function STR_TO_DATE(str, format)

func (StringToDatetime) Children 

func (s StringToDatetime) Children() []sql.Expression

Children returns the children expressions of this expression.

func (StringToDatetime) Eval 

func (s StringToDatetime) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval evaluates the given row and returns a result.

func (StringToDatetime) FunctionName 

func (s StringToDatetime) FunctionName() string

func (StringToDatetime) IsNullable 

func (s StringToDatetime) IsNullable() bool

IsNullable returns whether the expression can be null.

func (StringToDatetime) Resolved 

func (s StringToDatetime) Resolved() bool

Resolved returns whether the node is resolved.

func (StringToDatetime) String 

func (s StringToDatetime) String() string

func (StringToDatetime) Type 

func (s StringToDatetime) Type() sql.Type

Type returns the expression type.

func (StringToDatetime) WithChildren 

func (s StringToDatetime) WithChildren(children ...sql.Expression) (sql.Expression, error)

type Substring 

type Substring struct {
	// contains filtered or unexported fields
}

Substring is a function to return a part of a string. This function behaves as the homonym MySQL function. Since Go strings are UTF8, this function does not return a direct sub string str[start:start+length], instead returns the substring of rune s. That is, "á"[0:1] does not return a partial unicode glyph, but "á" itself.

func (*Substring) Children 

func (s *Substring) Children() []sql.Expression

Children implements the Expression interface.

func (*Substring) Eval 

func (s *Substring) Eval(
	ctx *sql.Context,
	row sql.Row,
) (interface{}, error)

Eval implements the Expression interface.

func (*Substring) FunctionName 

func (s *Substring) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Substring) IsNullable 

func (s *Substring) IsNullable() bool

IsNullable implements the Expression interface.

func (*Substring) Resolved 

func (s *Substring) Resolved() bool

Resolved implements the Expression interface.

func (*Substring) String 

func (s *Substring) String() string

func (*Substring) Type 

func (*Substring) Type() sql.Type

Type implements the Expression interface.

func (*Substring) WithChildren 

func (*Substring) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type SubstringIndex 

type SubstringIndex struct {
	// contains filtered or unexported fields
}

SubstringIndex returns the substring from string str before count occurrences of the delimiter delim. If count is positive, everything to the left of the final delimiter (counting from the left) is returned. If count is negative, everything to the right of the final delimiter (counting from the right) is returned. SUBSTRING_INDEX() performs a case-sensitive match when searching for delim.

func (*SubstringIndex) Children 

func (s *SubstringIndex) Children() []sql.Expression

Children implements the Expression interface.

func (*SubstringIndex) Eval 

func (s *SubstringIndex) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*SubstringIndex) FunctionName 

func (s *SubstringIndex) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*SubstringIndex) IsNullable 

func (s *SubstringIndex) IsNullable() bool

IsNullable implements the Expression interface.

func (*SubstringIndex) Resolved 

func (s *SubstringIndex) Resolved() bool

Resolved implements the Expression interface.

func (*SubstringIndex) String 

func (s *SubstringIndex) String() string

func (*SubstringIndex) Type 

func (*SubstringIndex) Type() sql.Type

Type implements the Expression interface.

func (*SubstringIndex) WithChildren 

func (s *SubstringIndex) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Tan 

type Tan struct {
	*UnaryFunc
}

func (*Tan) Eval 

func (t *Tan) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (*Tan) WithChildren 

func (t *Tan) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type TimeDiff 

type TimeDiff struct {
	expression.BinaryExpression
}

TimeDiff subtracts the second argument from the first expressed as a time value.

func (*TimeDiff) Eval 

func (td *TimeDiff) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*TimeDiff) FunctionName 

func (td *TimeDiff) FunctionName() string

func (*TimeDiff) IsNullable 

func (td *TimeDiff) IsNullable() bool

IsNullable implements the Expression interface.

func (*TimeDiff) String 

func (td *TimeDiff) String() string

func (*TimeDiff) Type 

func (td *TimeDiff) Type() sql.Type

Type implements the Expression interface.

func (*TimeDiff) WithChildren 

func (td *TimeDiff) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type TimeToSec 

type TimeToSec struct {
	*UnaryDatetimeFunc
}

TimeToSec implements the time_to_sec function

func (*TimeToSec) Eval 

func (m *TimeToSec) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (*TimeToSec) WithChildren 

func (m *TimeToSec) WithChildren(children ...sql.Expression) (sql.Expression, error)

type TimestampConversion 

type TimestampConversion struct {
	Date sql.Expression
}

TimestampConversion is a shorthand function for CONVERT(expr, TIMESTAMP)

func (*TimestampConversion) Children 

func (t *TimestampConversion) Children() []sql.Expression

func (*TimestampConversion) Eval 

func (t *TimestampConversion) Eval(ctx *sql.Context, r sql.Row) (interface{}, error)

func (*TimestampConversion) FunctionName 

func (t *TimestampConversion) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*TimestampConversion) IsNullable 

func (t *TimestampConversion) IsNullable() bool

func (*TimestampConversion) Resolved 

func (t *TimestampConversion) Resolved() bool

func (*TimestampConversion) String 

func (t *TimestampConversion) String() string

func (*TimestampConversion) Type 

func (t *TimestampConversion) Type() sql.Type

func (*TimestampConversion) WithChildren 

func (t *TimestampConversion) WithChildren(children ...sql.Expression) (sql.Expression, error)

type ToBase64 

type ToBase64 struct {
	expression.UnaryExpression
}

ToBase64 is a function to encode a string to the Base64 format using the same dialect that MySQL's TO_BASE64 uses

func (*ToBase64) Eval 

func (t *ToBase64) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*ToBase64) FunctionName 

func (t *ToBase64) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*ToBase64) IsNullable 

func (t *ToBase64) IsNullable() bool

IsNullable implements the Expression interface.

func (*ToBase64) String 

func (t *ToBase64) String() string

String implements the fmt.Stringer interface.

func (*ToBase64) Type 

func (t *ToBase64) Type() sql.Type

Type implements the Expression interface.

func (*ToBase64) WithChildren 

func (t *ToBase64) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Trim 

type Trim struct {
	expression.UnaryExpression
	// contains filtered or unexported fields
}

Trim is a function that returns the string with prefix or suffix spaces removed based on the trimType

func (*Trim) Eval 

func (t *Trim) Eval(
	ctx *sql.Context,
	row sql.Row,
) (interface{}, error)

Eval implements the Expression interface.

func (*Trim) FunctionName 

func (t *Trim) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Trim) IsNullable 

func (t *Trim) IsNullable() bool

IsNullable implements the Expression interface.

func (*Trim) String 

func (t *Trim) String() string

func (*Trim) Type 

func (t *Trim) Type() sql.Type

Type implements the Expression interface.

func (*Trim) WithChildren 

func (t *Trim) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type UTCTimestamp 

type UTCTimestamp struct {
	// contains filtered or unexported fields
}

UTCTimestamp is a function that returns the current time.

func (*UTCTimestamp) Children 

func (ut *UTCTimestamp) Children() []sql.Expression

Children implements the sql.Expression interface.

func (*UTCTimestamp) Eval 

func (ut *UTCTimestamp) Eval(ctx *sql.Context, _ sql.Row) (interface{}, error)

Eval implements the sql.Expression interface.

func (*UTCTimestamp) FunctionName 

func (ut *UTCTimestamp) FunctionName() string

func (*UTCTimestamp) IsNullable 

func (ut *UTCTimestamp) IsNullable() bool

IsNullable implements the sql.Expression interface.

func (*UTCTimestamp) Resolved 

func (ut *UTCTimestamp) Resolved() bool

Resolved implements the sql.Expression interface.

func (*UTCTimestamp) String 

func (ut *UTCTimestamp) String() string

func (*UTCTimestamp) Type 

func (ut *UTCTimestamp) Type() sql.Type

Type implements the sql.Expression interface.

func (*UTCTimestamp) WithChildren 

func (ut *UTCTimestamp) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type UUIDFunc 

type UUIDFunc struct{}

func (UUIDFunc) Children 

func (u UUIDFunc) Children() []sql.Expression

Children returns the children expressions of this expression.

func (UUIDFunc) Eval 

func (u UUIDFunc) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (UUIDFunc) FunctionName 

func (u UUIDFunc) FunctionName() string

func (UUIDFunc) IsNullable 

func (u UUIDFunc) IsNullable() bool

IsNullable returns whether the expression can be null.

func (UUIDFunc) Resolved 

func (u UUIDFunc) Resolved() bool

func (UUIDFunc) String 

func (u UUIDFunc) String() string

func (UUIDFunc) Type 

func (u UUIDFunc) Type() sql.Type

func (UUIDFunc) WithChildren 

func (u UUIDFunc) WithChildren(children ...sql.Expression) (sql.Expression, error)

type UUIDToBin 

type UUIDToBin struct {
	// contains filtered or unexported fields
}

func (UUIDToBin) Children 

func (ub UUIDToBin) Children() []sql.Expression

Children returns the children expressions of this expression.

func (UUIDToBin) Eval 

func (ub UUIDToBin) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (UUIDToBin) FunctionName 

func (ub UUIDToBin) FunctionName() string

func (UUIDToBin) IsNullable 

func (ub UUIDToBin) IsNullable() bool

IsNullable returns whether the expression can be null.

func (UUIDToBin) Resolved 

func (ub UUIDToBin) Resolved() bool

func (UUIDToBin) String 

func (ub UUIDToBin) String() string

func (UUIDToBin) Type 

func (ub UUIDToBin) Type() sql.Type

func (UUIDToBin) WithChildren 

func (ub UUIDToBin) WithChildren(children ...sql.Expression) (sql.Expression, error)

type UnaryDatetimeFunc 

type UnaryDatetimeFunc struct {
	expression.UnaryExpression
	// Name is the name of the function
	Name string
	// SQLType is the return type of the function
	SQLType sql.Type
}

UnaryDatetimeFunc is a sql.Function which takes a single datetime argument

func NewUnaryDatetimeFunc 

func NewUnaryDatetimeFunc(arg sql.Expression, name string, sqlType sql.Type) *UnaryDatetimeFunc

func (*UnaryDatetimeFunc) EvalChild 

func (dtf *UnaryDatetimeFunc) EvalChild(ctx *sql.Context, row sql.Row) (interface{}, error)

func (*UnaryDatetimeFunc) FunctionName 

func (dtf *UnaryDatetimeFunc) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*UnaryDatetimeFunc) String 

func (dtf *UnaryDatetimeFunc) String() string

String implements the fmt.Stringer interface.

func (*UnaryDatetimeFunc) Type 

func (dtf *UnaryDatetimeFunc) Type() sql.Type

Type implements the Expression interface.

type UnaryFunc 

type UnaryFunc struct {
	expression.UnaryExpression
	// Name is the name of the function
	Name string
	// The type returned by the function
	RetType sql.Type
}

func NewUnaryFunc 

func NewUnaryFunc(arg sql.Expression, name string, returnType sql.Type) *UnaryFunc

func (*UnaryFunc) EvalChild 

func (uf *UnaryFunc) EvalChild(ctx *sql.Context, row sql.Row) (interface{}, error)

EvalChild is a convenience function for safely evaluating a child expression

func (*UnaryFunc) FunctionName 

func (uf *UnaryFunc) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*UnaryFunc) String 

func (uf *UnaryFunc) String() string

String implements the fmt.Stringer interface.

func (*UnaryFunc) Type 

func (uf *UnaryFunc) Type() sql.Type

Type implements the Expression interface.

type Unhex 

type Unhex struct {
	*UnaryFunc
}

Unhex implements the sql function "unhex" which returns the integer representation of a hexadecimal string

func (*Unhex) Eval 

func (h *Unhex) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the sql.Expression interface

func (*Unhex) WithChildren 

func (h *Unhex) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the sql.Expression interface

type UnixTimestamp 

type UnixTimestamp struct {
	Date sql.Expression
}

UnixTimestamp converts the argument to the number of seconds since 1970-01-01 00:00:00 UTC. With no argument, returns number of seconds since unix epoch for the current time.

func (*UnixTimestamp) Children 

func (ut *UnixTimestamp) Children() []sql.Expression

func (*UnixTimestamp) Eval 

func (ut *UnixTimestamp) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (*UnixTimestamp) FunctionName 

func (ut *UnixTimestamp) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*UnixTimestamp) IsNullable 

func (ut *UnixTimestamp) IsNullable() bool

func (*UnixTimestamp) Resolved 

func (ut *UnixTimestamp) Resolved() bool

func (*UnixTimestamp) String 

func (ut *UnixTimestamp) String() string

func (*UnixTimestamp) Type 

func (ut *UnixTimestamp) Type() sql.Type

func (*UnixTimestamp) WithChildren 

func (ut *UnixTimestamp) WithChildren(children ...sql.Expression) (sql.Expression, error)

type Upper 

type Upper struct {
	expression.UnaryExpression
}

Upper is a function that returns the UPPERCASE of the text provided.

func (*Upper) Eval 

func (u *Upper) Eval(
	ctx *sql.Context,
	row sql.Row,
) (interface{}, error)

Eval implements the Expression interface.

func (*Upper) FunctionName 

func (u *Upper) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Upper) String 

func (u *Upper) String() string

func (*Upper) Type 

func (u *Upper) Type() sql.Type

Type implements the Expression interface.

func (*Upper) WithChildren 

func (u *Upper) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type User 

type User struct {
	NoArgFunc
}

func (User) Eval 

func (c User) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.Expression

func (User) WithChildren 

func (c User) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.Expression

type Values 

type Values struct {
	expression.UnaryExpression
	Value interface{}
}

Values is used in an ON DUPLICATE KEY UPDATE statement to return the value stated in the to-be-inserted column. For example, given the following statement: INSERT INTO table (pk, v1, v2) VALUES (1, 3, 5), (2, 4, 6) ON DUPLICATE KEY UPDATE v2 = values(v1) * 10; the values inserted into v2 would be 30 and 40.

func (*Values) Eval 

func (v *Values) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements sql.FunctionExpression.

func (*Values) FunctionName 

func (v *Values) FunctionName() string

FunctionName implements sql.FunctionExpression.

func (*Values) String 

func (v *Values) String() string

String implements sql.FunctionExpression.

func (*Values) Type 

func (v *Values) Type() sql.Type

Type implements sql.FunctionExpression.

func (*Values) WithChildren 

func (v *Values) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements sql.FunctionExpression.

type Version 

type Version string

Version is a function that returns server version.

func (Version) Children 

func (f Version) Children() []sql.Expression

Children implements the Expression interface.

func (Version) Eval 

func (f Version) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (Version) FunctionName 

func (f Version) FunctionName() string

FunctionName implements sql.FunctionExpression

func (Version) IsNullable 

func (f Version) IsNullable() bool

IsNullable implements the Expression interface.

func (Version) Resolved 

func (f Version) Resolved() bool

Resolved implements the Expression interface.

func (Version) String 

func (f Version) String() string

func (Version) Type 

func (f Version) Type() sql.Type

Type implements the Expression interface.

func (Version) WithChildren 

func (f Version) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Week 

type Week struct {
	// contains filtered or unexported fields
}

Week is a function that returns year and week for a date. The year in the result may be different from the year in the date argument for the first and the last week of the year. Details: https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_yearweek

func (*Week) Children 

func (d *Week) Children() []sql.Expression

Children implements the Expression interface.

func (*Week) Eval 

func (d *Week) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Week) FunctionName 

func (d *Week) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Week) IsNullable 

func (d *Week) IsNullable() bool

IsNullable implements the Expression interface.

func (*Week) Resolved 

func (d *Week) Resolved() bool

Resolved implements the Expression interface.

func (*Week) String 

func (d *Week) String() string

func (*Week) Type 

func (d *Week) Type() sql.Type

Type implements the Expression interface.

func (*Week) WithChildren 

func (*Week) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type WeekOfYear 

type WeekOfYear struct {
	*UnaryDatetimeFunc
}

WeekOfYear implements the weekofyear function

func (*WeekOfYear) Eval 

func (m *WeekOfYear) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

func (*WeekOfYear) WithChildren 

func (m *WeekOfYear) WithChildren(children ...sql.Expression) (sql.Expression, error)

type Weekday 

type Weekday struct {
	expression.UnaryExpression
}

Weekday is a function that returns the weekday of a date where 0 = Monday, ..., 6 = Sunday.

func (*Weekday) Eval 

func (d *Weekday) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Weekday) FunctionName 

func (d *Weekday) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Weekday) String 

func (d *Weekday) String() string

func (*Weekday) Type 

func (d *Weekday) Type() sql.Type

Type implements the Expression interface.

func (*Weekday) WithChildren 

func (d *Weekday) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type Year 

type Year struct {
	expression.UnaryExpression
}

Year is a function that returns the year of a date.

func (*Year) Eval 

func (y *Year) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*Year) FunctionName 

func (y *Year) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*Year) String 

func (y *Year) String() string

func (*Year) Type 

func (y *Year) Type() sql.Type

Type implements the Expression interface.

func (*Year) WithChildren 

func (y *Year) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

type YearWeek 

type YearWeek struct {
	// contains filtered or unexported fields
}

YearWeek is a function that returns year and week for a date. The year in the result may be different from the year in the date argument for the first and the last week of the year. Details: https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_yearweek

func (*YearWeek) Children 

func (d *YearWeek) Children() []sql.Expression

Children implements the Expression interface.

func (*YearWeek) Eval 

func (d *YearWeek) Eval(ctx *sql.Context, row sql.Row) (interface{}, error)

Eval implements the Expression interface.

func (*YearWeek) FunctionName 

func (d *YearWeek) FunctionName() string

FunctionName implements sql.FunctionExpression

func (*YearWeek) IsNullable 

func (d *YearWeek) IsNullable() bool

IsNullable implements the Expression interface.

func (*YearWeek) Resolved 

func (d *YearWeek) Resolved() bool

Resolved implements the Expression interface.

func (*YearWeek) String 

func (d *YearWeek) String() string

func (*YearWeek) Type 

func (d *YearWeek) Type() sql.Type

Type implements the Expression interface.

func (*YearWeek) WithChildren 

func (*YearWeek) WithChildren(children ...sql.Expression) (sql.Expression, error)

WithChildren implements the Expression interface.

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