element

package
v0.0.0-...-780ac92 Latest Latest
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 Go to latest Published: Mar 7, 2024 License: Apache-2.0 Imports: 11 Imported by: 6

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	ErrColumnExist              = errors.New("column exist")                  // Column exists error
	ErrColumnNotExist           = errors.New("column does not exist")         // Column does not exist error
	ErrNilValue                 = errors.New("column value is nil")           // Null value error
	ErrIndexOutOfRange          = errors.New("column index is out of range")  // Index value out of range
	ErrValueNotInt64            = errors.New("value is not int64")            // Not an int64 error
	ErrValueInfinity            = errors.New("value is infinity")             // Infinite real number error
	ErrNotColumnValueClonable   = errors.New("columnValue is not clonable")   // Not a clonable column value
	ErrNotColumnValueComparable = errors.New("columnValue is not comparable") // Not a comparable column value
	ErrColumnNameNotEqual       = errors.New("column name is not equal")      // Column names differ
)

Error

View Source 
var DefaultTimeFormat = "2006-01-02 15:04:05.999999999Z07:00"

DefaultTimeFormat - Default time format

Functions

func ByteSize 

func ByteSize(src interface{}) int

ByteSize: Byte size

Types

type BigInt 

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

BigInt - Big integer

func (*BigInt) AsBigInt 

func (b *BigInt) AsBigInt() *big.Int

AsBigInt - Convert to high-precision integer

func (*BigInt) AsDecimal 

func (b *BigInt) AsDecimal() decimal.Decimal

AsDecimal - Convert to high-precision decimal

func (*BigInt) BigInt 

func (b *BigInt) BigInt() BigIntNumber

BigInt - Convert to high-precision integer

func (*BigInt) Bool 

func (b *BigInt) Bool() (bool, error)

Bool - Convert to boolean

func (*BigInt) CloneBigInt 

func (b *BigInt) CloneBigInt() BigIntNumber

CloneBigInt - Clone high-precision integer

func (*BigInt) CloneDecimal 

func (b *BigInt) CloneDecimal() DecimalNumber

CloneDecimal - Clone high-precision decimal

func (*BigInt) Decimal 

func (b *BigInt) Decimal() DecimalNumber

Decimal - Convert to high-precision decimal

func (*BigInt) Float64 

func (b *BigInt) Float64() (v float64, err error)

Float64 - Convert to 64-bit floating-point number

func (*BigInt) Int64 

func (b *BigInt) Int64() (int64, error)

Int64 - Convert to 64-bit integer

func (*BigInt) String 

func (b *BigInt) String() string

Decimal - Convert to string

type BigIntColumnValue 

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

BigIntColumnValue - Value for a big integer column

func (*BigIntColumnValue) AsBigInt 

func (b *BigIntColumnValue) AsBigInt() (BigIntNumber, error)

AsBigInt - Convert to a big integer

func (*BigIntColumnValue) AsBool 

func (b *BigIntColumnValue) AsBool() (bool, error)

AsBool - Convert to a boolean value, where non-zero becomes true and zero becomes false

func (*BigIntColumnValue) AsBytes 

func (b *BigIntColumnValue) AsBytes() ([]byte, error)

AsBytes - Convert to a byte stream, e.g., 1234556790 becomes [49, 50, 51, 52, 53, 54, 55, 56, 57, 48]

func (*BigIntColumnValue) AsDecimal 

func (b *BigIntColumnValue) AsDecimal() (DecimalNumber, error)

AsDecimal - Convert to a high-precision decimal number

func (*BigIntColumnValue) AsString 

func (b *BigIntColumnValue) AsString() (string, error)

AsString - Convert to a string, e.g., 1234556790 becomes 1234556790

func (*BigIntColumnValue) AsTime 

func (b *BigIntColumnValue) AsTime() (time.Time, error)

AsTime - Currently, integers cannot be converted to time

func (*BigIntColumnValue) Clone 

func (b *BigIntColumnValue) Clone() ColumnValue

Clone - Clone the big integer column value

func (*BigIntColumnValue) Cmp 

func (b *BigIntColumnValue) Cmp(right ColumnValue) (int, error)

Cmp - Return 1 for greater than, 0 for equal, and -1 for less than

func (*BigIntColumnValue) IsNil 

func (n *BigIntColumnValue) IsNil() bool

IsNil: Whether it is null

func (*BigIntColumnValue) String 

func (b *BigIntColumnValue) String() string

func (*BigIntColumnValue) Type 

func (b *BigIntColumnValue) Type() ColumnType

Type - Return the type of the column

type BigIntNumber 

type BigIntNumber interface {
	Number

	Int64() (int64, error)
	Decimal() DecimalNumber
	CloneBigInt() BigIntNumber
	AsBigInt() *big.Int
}

BigIntNumber - High-precision integer

type BigIntStr 

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

BigIntStr - High-precision integer string

func (*BigIntStr) AsBigInt 

func (b *BigIntStr) AsBigInt() *big.Int

AsBigInt - Convert to high-precision integer

func (*BigIntStr) AsDecimal 

func (b *BigIntStr) AsDecimal() decimal.Decimal

AsDecimal - Convert to high-precision decimal

func (*BigIntStr) BigInt 

func (b *BigIntStr) BigInt() BigIntNumber

BigInt - Convert to high-precision integer

func (*BigIntStr) Bool 

func (b *BigIntStr) Bool() (bool, error)

Bool - Convert to boolean

func (*BigIntStr) CloneBigInt 

func (b *BigIntStr) CloneBigInt() BigIntNumber

CloneBigInt - Clone high-precision integer

func (*BigIntStr) CloneDecimal 

func (b *BigIntStr) CloneDecimal() DecimalNumber

CloneDecimal - Clone high-precision decimal

func (*BigIntStr) Decimal 

func (b *BigIntStr) Decimal() DecimalNumber

Decimal - Convert to high-precision decimal

func (*BigIntStr) Float64 

func (b *BigIntStr) Float64() (v float64, err error)

Float64 - Convert to 64-bit floating-point number

func (*BigIntStr) Int64 

func (b *BigIntStr) Int64() (int64, error)

Int64 - Convert to 64-bit integer

func (*BigIntStr) String 

func (b *BigIntStr) String() string

Decimal - Convert to string

type BoolColumnValue 

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

BoolColumnValue represents a Boolean column value

func (*BoolColumnValue) AsBigInt 

func (b *BoolColumnValue) AsBigInt() (BigIntNumber, error)

AsBigInt converts it to a big integer, where true becomes 1 and false becomes 0

func (*BoolColumnValue) AsBool 

func (b *BoolColumnValue) AsBool() (bool, error)

AsBool converts it to a boolean value

func (*BoolColumnValue) AsBytes 

func (b *BoolColumnValue) AsBytes() ([]byte, error)

AsBytes converts it to a byte stream, where true becomes true and false becomes false

func (*BoolColumnValue) AsDecimal 

func (b *BoolColumnValue) AsDecimal() (DecimalNumber, error)

AsDecimal converts it to a high-precision decimal number, where true becomes 1.0 and false becomes 0.0

func (*BoolColumnValue) AsString 

func (b *BoolColumnValue) AsString() (string, error)

AsString converts it to a string, where true becomes true and false becomes false

func (*BoolColumnValue) AsTime 

func (b *BoolColumnValue) AsTime() (time.Time, error)

AsTime: Currently, a Boolean cannot be converted to a time value

func (*BoolColumnValue) Clone 

func (b *BoolColumnValue) Clone() ColumnValue

Clone clones a Boolean column value

func (*BoolColumnValue) Cmp 

func (b *BoolColumnValue) Cmp(right ColumnValue) (int, error)

Cmp: Returns 1 for greater than, 0 for equal, and -1 for less than

func (*BoolColumnValue) IsNil 

func (n *BoolColumnValue) IsNil() bool

IsNil: Whether it is null

func (*BoolColumnValue) String 

func (b *BoolColumnValue) String() string

func (*BoolColumnValue) Type 

func (b *BoolColumnValue) Type() ColumnType

Type returns the type of the column

type BytesColumnValue 

type BytesColumnValue struct {
	TimeEncoder // Time Encoder
	// contains filtered or unexported fields
}

BytesColumnValue - Byte stream column value

func (*BytesColumnValue) AsBigInt 

func (b *BytesColumnValue) AsBigInt() (BigIntNumber, error)

AsBigInt - Convert to an integer. Real numbers and scientific notation strings will be rounded. Non-numeric values will report an error. E.g., 123.67 is converted to 123, and 123.12 is converted to 123.

func (*BytesColumnValue) AsBool 

func (b *BytesColumnValue) AsBool() (bool, error)

AsBool - Convert 1, t, T, TRUE, true, True to true Convert 0, f, F, FALSE, false, False to false. If none of the above, an error is reported.

func (*BytesColumnValue) AsBytes 

func (b *BytesColumnValue) AsBytes() ([]byte, error)

AsBytes - Convert to a byte stream

func (*BytesColumnValue) AsDecimal 

func (b *BytesColumnValue) AsDecimal() (DecimalNumber, error)

AsDecimal - Convert to a high-precision decimal. Real numbers and scientific notation strings can be converted. Non-numeric values will report an error.

func (*BytesColumnValue) AsString 

func (b *BytesColumnValue) AsString() (string, error)

AsString - Convert to a string

func (*BytesColumnValue) AsTime 

func (b *BytesColumnValue) AsTime() (t time.Time, err error)

AsTime - Convert to time based on the time encoder. If it does not match the time encoder format, an error is reported.

func (*BytesColumnValue) Clone 

func (b *BytesColumnValue) Clone() ColumnValue

Clone - Clone the byte stream column value

func (*BytesColumnValue) Cmp 

func (b *BytesColumnValue) Cmp(right ColumnValue) (int, error)

Cmp - Return 1 for greater than, 0 for equal, and -1 for less than

func (*BytesColumnValue) IsNil 

func (n *BytesColumnValue) IsNil() bool

IsNil: Whether it is null

func (*BytesColumnValue) String 

func (b *BytesColumnValue) String() string

func (*BytesColumnValue) Type 

func (b *BytesColumnValue) Type() ColumnType

Type - Return the column type

type Column 

type Column interface {
	ColumnValue
	AsInt64() (int64, error)     // ToInt64: Convert to 64-bit integer
	AsFloat64() (float64, error) // ToFloat64: Convert to 64-bit real number
	Clone() (Column, error)      // Clone: Clone
	Cmp(Column) (int, error)     // Compare: 1 represents greater than, 0 represents equal, -1 represents less than
	Name() string                // Name: Column name
	ByteSize() int64             // ByteSize: Byte stream size
	MemorySize() int64           // MemorySize: Memory size
}

Column: Column

func NewDefaultColumn 

func NewDefaultColumn(v ColumnValue, name string, byteSize int) Column

NewDefaultColumn: Create a new default column based on column value v, column name name, and byte stream size byteSize

type ColumnType 

type ColumnType string

ColumnType: Column Type 

const (
	TypeUnknown ColumnType = "unknown" // UnknownType: Unknown type
	TypeBool    ColumnType = "bool"    // BoolType: Boolean type
	TypeBigInt  ColumnType = "bigInt"  // IntType: Integer type
	TypeDecimal ColumnType = "decimal" // DecimalType: High-precision real number type
	TypeString  ColumnType = "string"  // StringType: String type
	TypeBytes   ColumnType = "bytes"   // BytesType: Byte stream type
	TypeTime    ColumnType = "time"    // TimeType: Time type
)

ColumnTypeEnum: Enumeration of column types

func (ColumnType) String 

func (c ColumnType) String() string

String: Printing display

type ColumnValue 

type ColumnValue interface {
	fmt.Stringer

	Type() ColumnType                  // ColumnType: Column type
	IsNil() bool                       // IsNull: Whether it is null
	AsBool() (bool, error)             // ToBool: Convert to boolean
	AsBigInt() (BigIntNumber, error)   // ToInt: Convert to integer
	AsDecimal() (DecimalNumber, error) // ToDecimal: Convert to high-precision real number
	AsString() (string, error)         // ToString: Convert to string
	AsBytes() ([]byte, error)          // ToBytes: Convert to byte stream
	AsTime() (time.Time, error)        // ToTime: Convert to time
}

ColumnValue: Column Value

func NewBigIntColumnValue 

func NewBigIntColumnValue(v *big.Int) ColumnValue

NewBigIntColumnValue - Create a big integer column value from a big.Int v

func NewBigIntColumnValueFromInt64 

func NewBigIntColumnValueFromInt64(v int64) ColumnValue

NewBigIntColumnValueFromInt64 - Create a big integer column value from an int64 v

func NewBigIntColumnValueFromString 

func NewBigIntColumnValueFromString(v string) (ColumnValue, error)

NewBigIntColumnValueFromString - Create a big integer column value from a string v If the string v is not an integer, an error is returned

func NewBoolColumnValue 

func NewBoolColumnValue(v bool) ColumnValue

NewBoolColumnValue creates a Boolean column value from the boolean value v

func NewBytesColumnValue 

func NewBytesColumnValue(v []byte) ColumnValue

NewBytesColumnValue - Generate a byte stream column value from byte stream v, making a copy

func NewBytesColumnValueNoCopy 

func NewBytesColumnValueNoCopy(v []byte) ColumnValue

NewBytesColumnValueNoCopy - Generate a byte stream column value from byte stream v, without making a copy

func NewBytesColumnValueWithEncoder 

func NewBytesColumnValueWithEncoder(v []byte, e TimeEncoder) ColumnValue

NewBytesColumnValueWithEncoder - Generate a byte stream column value from byte stream v and time encoder e, making a copy

func NewBytesColumnValueWithEncoderNoCopy 

func NewBytesColumnValueWithEncoderNoCopy(v []byte, e TimeEncoder) ColumnValue

NewBytesColumnValueWithEncoderNoCopy - Generate a byte stream column value from byte stream v and time encoder e, without making a copy

func NewDecimalColumnValue 

func NewDecimalColumnValue(d decimal.Decimal) ColumnValue

NewDecimalColumnValue creates a high-precision decimal column value from a high-precision decimal value.

func NewDecimalColumnValueFromFloat 

func NewDecimalColumnValueFromFloat(f float64) ColumnValue

NewDecimalColumnValueFromFloat creates a high-precision decimal column value from a float64 value.

func NewDecimalColumnValueFromString 

func NewDecimalColumnValueFromString(s string) (ColumnValue, error)

NewDecimalColumnValueFromString creates a high-precision decimal column value from a string. If the string is not a numeric value or in scientific notation, an error will be reported.

func NewNilBigIntColumnValue 

func NewNilBigIntColumnValue() ColumnValue

NewNilBigIntColumnValue - Create a null value for a big integer column

func NewNilBoolColumnValue 

func NewNilBoolColumnValue() ColumnValue

NewNilBoolColumnValue creates an empty Boolean column value

func NewNilBytesColumnValue 

func NewNilBytesColumnValue() ColumnValue

NewNilBytesColumnValue - Create a null byte stream column value

func NewNilDecimalColumnValue 

func NewNilDecimalColumnValue() ColumnValue

NewNilDecimalColumnValue creates a null value for a high-precision decimal column.

func NewNilStringColumnValue 

func NewNilStringColumnValue() ColumnValue

NewNilStringColumnValue - Create a null value for a string column

func NewNilTimeColumnValue 

func NewNilTimeColumnValue() ColumnValue

NewNilTimeColumnValue creates an empty time column value

func NewStringColumnValue 

func NewStringColumnValue(s string) ColumnValue

NewStringColumnValue - Create a string column value based on the string s

func NewStringColumnValueWithEncoder 

func NewStringColumnValueWithEncoder(s string, e TimeEncoder) ColumnValue

NewStringColumnValueWithEncoder - Create a string column value based on the string s and time encoder e

func NewTimeColumnValue 

func NewTimeColumnValue(t time.Time) ColumnValue

NewTimeColumnValue creates a time column value from the time t

func NewTimeColumnValueWithDecoder 

func NewTimeColumnValueWithDecoder(t time.Time, d TimeDecoder) ColumnValue

NewTimeColumnValueWithDecoder creates a time column value from the time t and the time decoder

type ColumnValueClonable 

type ColumnValueClonable interface {
	Clone() ColumnValue // Clone: Clone
}

ColumnValueClonable: Cloneable column value

type ColumnValueComparabale 

type ColumnValueComparabale interface {
	// Compare: 1 represents greater than, 0 represents equal, -1 represents less than
	Cmp(ColumnValue) (int, error)
}

ColumnValueComparabale: Comparable column value

type Converter 

type Converter struct{}

Converter - Number converter

func (*Converter) ConvertBigInt 

func (c *Converter) ConvertBigInt(s string) (num BigIntNumber, err error)

ConvertBigInt converts a string to an integer

func (*Converter) ConvertBigIntFromInt 

func (c *Converter) ConvertBigIntFromInt(i int64) (num BigIntNumber)

ConvertBigIntFromInt - Convert to decimal from integer

func (*Converter) ConvertDecimal 

func (c *Converter) ConvertDecimal(s string) (num DecimalNumber, err error)

ConvertDecimal - Convert string to decimal

func (*Converter) ConvertDecimalFromFloat 

func (c *Converter) ConvertDecimalFromFloat(f float64) (num DecimalNumber)

ConvertDecimalFromFloat - Convert to decimal from floating-point number

type Decimal 

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

Decimal - High-precision decimal

func (*Decimal) AsDecimal 

func (d *Decimal) AsDecimal() decimal.Decimal

AsDecimal - Convert to high-precision decimal

func (*Decimal) BigInt 

func (d *Decimal) BigInt() BigIntNumber

BigInt - Convert to high-precision integer

func (*Decimal) Bool 

func (d *Decimal) Bool() (bool, error)

Bool - Convert to boolean

func (*Decimal) CloneDecimal 

func (d *Decimal) CloneDecimal() DecimalNumber

CloneDecimal - Clone high-precision decimal

func (*Decimal) Decimal 

func (d *Decimal) Decimal() DecimalNumber

Decimal - Convert to high-precision decimal

func (*Decimal) Float64 

func (d *Decimal) Float64() (float64, error)

Float64 - Convert to 64-bit floating-point number

func (*Decimal) String 

func (d *Decimal) String() string

Decimal - Convert to string

type DecimalColumnValue 

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

DecimalColumnValue represents a high-precision decimal column value.

func (*DecimalColumnValue) AsBigInt 

func (d *DecimalColumnValue) AsBigInt() (BigIntNumber, error)

AsBigInt rounds down the high-precision decimal value, e.g., 123.67 becomes 123, and 123.12 becomes 123.

func (*DecimalColumnValue) AsBool 

func (d *DecimalColumnValue) AsBool() (bool, error)

AsBool converts non-zero values to true and zero values to false.

func (*DecimalColumnValue) AsBytes 

func (d *DecimalColumnValue) AsBytes() ([]byte, error)

AsBytes converts to a byte stream, e.g., 10.123 becomes the byte representation of 10.123.

func (*DecimalColumnValue) AsDecimal 

func (d *DecimalColumnValue) AsDecimal() (DecimalNumber, error)

AsDecimal converts to a high-precision decimal.

func (*DecimalColumnValue) AsString 

func (d *DecimalColumnValue) AsString() (string, error)

AsString converts to a string, e.g., 10.123 becomes 10.123.

func (*DecimalColumnValue) AsTime 

func (d *DecimalColumnValue) AsTime() (time.Time, error)

AsTime currently cannot convert to a time value.

func (*DecimalColumnValue) Clone 

func (d *DecimalColumnValue) Clone() ColumnValue

Clone creates a copy (clone) of a high-precision decimal column value.

func (*DecimalColumnValue) Cmp 

func (d *DecimalColumnValue) Cmp(right ColumnValue) (int, error)

Cmp returns 1 for greater than, 0 for equal, and -1 for less than.

func (*DecimalColumnValue) IsNil 

func (n *DecimalColumnValue) IsNil() bool

IsNil: Whether it is null

func (*DecimalColumnValue) String 

func (d *DecimalColumnValue) String() string

func (*DecimalColumnValue) Type 

func (d *DecimalColumnValue) Type() ColumnType

Type represents the type of the column.

type DecimalNumber 

type DecimalNumber interface {
	Number

	Float64() (float64, error)
	BigInt() BigIntNumber
	CloneDecimal() DecimalNumber
	AsDecimal() decimal.Decimal
}

DecimalNumber - High-precision decimal

type DecimalStr 

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

DecimalStr - High-precision decimal string

func (*DecimalStr) AsDecimal 

func (d *DecimalStr) AsDecimal() decimal.Decimal

AsDecimal - Convert to high-precision decimal

func (*DecimalStr) BigInt 

func (d *DecimalStr) BigInt() BigIntNumber

BigInt - Convert to high-precision integer

func (*DecimalStr) Bool 

func (d *DecimalStr) Bool() (bool, error)

Bool - Convert to boolean

func (*DecimalStr) CloneDecimal 

func (d *DecimalStr) CloneDecimal() DecimalNumber

CloneDecimal - Clone high-precision decimal

func (*DecimalStr) Decimal 

func (d *DecimalStr) Decimal() DecimalNumber

Decimal - Convert to high-precision decimal

func (*DecimalStr) Float64 

func (d *DecimalStr) Float64() (v float64, err error)

Float64 - Convert to 64-bit floating-point number

func (*DecimalStr) String 

func (d *DecimalStr) String() string

Decimal - Convert to string

type DefaultColumn 

type DefaultColumn struct {
	ColumnValue // ColumnValue: Column value
	// contains filtered or unexported fields
}

DefaultColumn: Default value

func (*DefaultColumn) AsFloat64 

func (d *DefaultColumn) AsFloat64() (float64, error)

AsFloat64: Convert to 64-bit real number

func (*DefaultColumn) AsInt64 

func (d *DefaultColumn) AsInt64() (int64, error)

AsInt64: Convert to 64-bit integer

func (*DefaultColumn) ByteSize 

func (d *DefaultColumn) ByteSize() int64

ByteSize: Byte stream size

func (*DefaultColumn) Clone 

func (d *DefaultColumn) Clone() (Column, error)

Clone: Clone a column. If it's not a cloneable column value, an error will occur.

func (*DefaultColumn) Cmp 

func (d *DefaultColumn) Cmp(c Column) (int, error)

Cmp: Compare columns. If it's not a comparable column value, an error will occur.

func (*DefaultColumn) MemorySize 

func (d *DefaultColumn) MemorySize() int64

MemorySize: Memory size

func (*DefaultColumn) Name 

func (d *DefaultColumn) Name() string

Name: Column name

type DefaultRecord 

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

DefaultRecord represents a default record.

func NewDefaultRecord 

func NewDefaultRecord() *DefaultRecord

NewDefaultRecord creates a new default record.

func (*DefaultRecord) Add 

func (r *DefaultRecord) Add(c Column) error

AddColumn adds a new column c. If column c already exists, an error is reported.

func (*DefaultRecord) ByteSize 

func (r *DefaultRecord) ByteSize() int64

ByteSize represents the size of the record in bytes.

func (*DefaultRecord) ColumnNumber 

func (r *DefaultRecord) ColumnNumber() int

ColumnNumber represents the number of columns in the record.

func (*DefaultRecord) GetByIndex 

func (r *DefaultRecord) GetByIndex(i int) (Column, error)

GetByIndex gets the column at index i. If the index is out of range or doesn't exist, an error is reported.

func (*DefaultRecord) GetByName 

func (r *DefaultRecord) GetByName(name string) (Column, error)

GetByName gets the column with the specified name. If the column doesn't exist, an error is reported.

func (*DefaultRecord) MemorySize 

func (r *DefaultRecord) MemorySize() int64

MemorySize represents the size of the record in memory.

func (*DefaultRecord) Put 

func (r *DefaultRecord) Put(c Column) error

PutColumn sets the value of the column with the specified name. If the column name doesn't exist, an error is reported.

func (*DefaultRecord) Set 

func (r *DefaultRecord) Set(i int, c Column) error

SetColumnByIndex sets the value of the column at index i. If the index is out of range, an error is reported.

func (*DefaultRecord) String 

func (r *DefaultRecord) String() string

String is an empty method placeholder.

type Float64 

type Float64 struct {
	// contains filtered or unexported fields
}

Float64 - 64-bit floating-point number

func (*Float64) AsDecimal 

func (f *Float64) AsDecimal() decimal.Decimal

AsDecimal - Convert to high-precision decimal

func (*Float64) BigInt 

func (f *Float64) BigInt() BigIntNumber

BigInt - Convert to high-precision integer

func (*Float64) Bool 

func (f *Float64) Bool() (bool, error)

Bool - Convert to boolean

func (*Float64) CloneDecimal 

func (f *Float64) CloneDecimal() DecimalNumber

CloneDecimal - Clone high-precision decimal

func (*Float64) Decimal 

func (f *Float64) Decimal() DecimalNumber

Decimal - Convert to high-precision decimal

func (*Float64) Float64 

func (f *Float64) Float64() (float64, error)

Float64 - Convert to 64-bit floating-point number

func (*Float64) String 

func (f *Float64) String() string

Decimal - Convert to string

type Int64 

type Int64 struct {
	// contains filtered or unexported fields
}

Int64 - 64-bit integer

func (*Int64) AsBigInt 

func (i *Int64) AsBigInt() *big.Int

AsBigInt - Convert to high-precision integer

func (*Int64) AsDecimal 

func (i *Int64) AsDecimal() decimal.Decimal

AsDecimal - Convert to high-precision decimal

func (*Int64) BigInt 

func (i *Int64) BigInt() BigIntNumber

BigInt - Convert to high-precision integer

func (*Int64) Bool 

func (i *Int64) Bool() (bool, error)

Bool - Convert to boolean

func (*Int64) CloneBigInt 

func (i *Int64) CloneBigInt() BigIntNumber

CloneBigInt - Clone high-precision integer

func (*Int64) CloneDecimal 

func (i *Int64) CloneDecimal() DecimalNumber

CloneDecimal - Clone high-precision decimal

func (*Int64) Decimal 

func (i *Int64) Decimal() DecimalNumber

Decimal - Convert to high-precision decimal

func (*Int64) Float64 

func (i *Int64) Float64() (float64, error)

Float64 - Convert to 64-bit floating-point number

func (*Int64) Int64 

func (i *Int64) Int64() (int64, error)

Int64 - Convert to 64-bit integer

func (*Int64) String 

func (i *Int64) String() string

Decimal - Convert to string

type NilBigIntColumnValue 

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

NilBigIntColumnValue - Null value for a big integer column

func (NilBigIntColumnValue) AsBigInt 

func (n NilBigIntColumnValue) AsBigInt() (BigIntNumber, error)

AsBigInt: Failed to convert to integer

func (NilBigIntColumnValue) AsBool 

func (n NilBigIntColumnValue) AsBool() (bool, error)

AsBool: Failed to convert to boolean

func (NilBigIntColumnValue) AsBytes 

func (n NilBigIntColumnValue) AsBytes() ([]byte, error)

AsBytes: Failed to convert to byte stream

func (NilBigIntColumnValue) AsDecimal 

func (n NilBigIntColumnValue) AsDecimal() (DecimalNumber, error)

AsDecimal: Failed to convert to high-precision real number

func (NilBigIntColumnValue) AsString 

func (n NilBigIntColumnValue) AsString() (string, error)

AsString: Failed to convert to string

func (NilBigIntColumnValue) AsTime 

func (n NilBigIntColumnValue) AsTime() (time.Time, error)

AsTime: Failed to convert to time

func (*NilBigIntColumnValue) Clone 

func (n *NilBigIntColumnValue) Clone() ColumnValue

Clone - Clone the null value for a big integer column

func (NilBigIntColumnValue) IsNil 

func (n NilBigIntColumnValue) IsNil() bool

IsNil: Whether it is null

func (NilBigIntColumnValue) String 

func (n NilBigIntColumnValue) String() string

String: Printing display

func (*NilBigIntColumnValue) Type 

func (n *NilBigIntColumnValue) Type() ColumnType

Type - Return the type of the column

type NilBoolColumnValue 

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

NilBoolColumnValue represents an empty Boolean column value

func (NilBoolColumnValue) AsBigInt 

func (n NilBoolColumnValue) AsBigInt() (BigIntNumber, error)

AsBigInt: Failed to convert to integer

func (NilBoolColumnValue) AsBool 

func (n NilBoolColumnValue) AsBool() (bool, error)

AsBool: Failed to convert to boolean

func (NilBoolColumnValue) AsBytes 

func (n NilBoolColumnValue) AsBytes() ([]byte, error)

AsBytes: Failed to convert to byte stream

func (NilBoolColumnValue) AsDecimal 

func (n NilBoolColumnValue) AsDecimal() (DecimalNumber, error)

AsDecimal: Failed to convert to high-precision real number

func (NilBoolColumnValue) AsString 

func (n NilBoolColumnValue) AsString() (string, error)

AsString: Failed to convert to string

func (NilBoolColumnValue) AsTime 

func (n NilBoolColumnValue) AsTime() (time.Time, error)

AsTime: Failed to convert to time

func (*NilBoolColumnValue) Clone 

func (n *NilBoolColumnValue) Clone() ColumnValue

Clone clones an empty Boolean column value

func (NilBoolColumnValue) IsNil 

func (n NilBoolColumnValue) IsNil() bool

IsNil: Whether it is null

func (NilBoolColumnValue) String 

func (n NilBoolColumnValue) String() string

String: Printing display

func (*NilBoolColumnValue) Type 

func (n *NilBoolColumnValue) Type() ColumnType

Type returns the type of the column

type NilBytesColumnValue 

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

NilBytesColumnValue - Null byte stream column value

func (NilBytesColumnValue) AsBigInt 

func (n NilBytesColumnValue) AsBigInt() (BigIntNumber, error)

AsBigInt: Failed to convert to integer

func (NilBytesColumnValue) AsBool 

func (n NilBytesColumnValue) AsBool() (bool, error)

AsBool: Failed to convert to boolean

func (NilBytesColumnValue) AsBytes 

func (n NilBytesColumnValue) AsBytes() ([]byte, error)

AsBytes: Failed to convert to byte stream

func (NilBytesColumnValue) AsDecimal 

func (n NilBytesColumnValue) AsDecimal() (DecimalNumber, error)

AsDecimal: Failed to convert to high-precision real number

func (NilBytesColumnValue) AsString 

func (n NilBytesColumnValue) AsString() (string, error)

AsString: Failed to convert to string

func (NilBytesColumnValue) AsTime 

func (n NilBytesColumnValue) AsTime() (time.Time, error)

AsTime: Failed to convert to time

func (*NilBytesColumnValue) Clone 

func (n *NilBytesColumnValue) Clone() ColumnValue

Clone - Clone the null byte stream column value

func (NilBytesColumnValue) IsNil 

func (n NilBytesColumnValue) IsNil() bool

IsNil: Whether it is null

func (NilBytesColumnValue) String 

func (n NilBytesColumnValue) String() string

String: Printing display

func (*NilBytesColumnValue) Type 

func (n *NilBytesColumnValue) Type() ColumnType

Type - Return the column type

type NilDecimalColumnValue 

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

NilDecimalColumnValue represents a null value for a high-precision decimal column.

func (NilDecimalColumnValue) AsBigInt 

func (n NilDecimalColumnValue) AsBigInt() (BigIntNumber, error)

AsBigInt: Failed to convert to integer

func (NilDecimalColumnValue) AsBool 

func (n NilDecimalColumnValue) AsBool() (bool, error)

AsBool: Failed to convert to boolean

func (NilDecimalColumnValue) AsBytes 

func (n NilDecimalColumnValue) AsBytes() ([]byte, error)

AsBytes: Failed to convert to byte stream

func (NilDecimalColumnValue) AsDecimal 

func (n NilDecimalColumnValue) AsDecimal() (DecimalNumber, error)

AsDecimal: Failed to convert to high-precision real number

func (NilDecimalColumnValue) AsString 

func (n NilDecimalColumnValue) AsString() (string, error)

AsString: Failed to convert to string

func (NilDecimalColumnValue) AsTime 

func (n NilDecimalColumnValue) AsTime() (time.Time, error)

AsTime: Failed to convert to time

func (*NilDecimalColumnValue) Clone 

func (n *NilDecimalColumnValue) Clone() ColumnValue

Clone creates a copy (clone) of a high-precision decimal column value.

func (NilDecimalColumnValue) IsNil 

func (n NilDecimalColumnValue) IsNil() bool

IsNil: Whether it is null

func (NilDecimalColumnValue) String 

func (n NilDecimalColumnValue) String() string

String: Printing display

func (*NilDecimalColumnValue) Type 

func (n *NilDecimalColumnValue) Type() ColumnType

Type represents the type of the column.

type NilStringColumnValue 

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

NilStringColumnValue - Null value for a string column

func (NilStringColumnValue) AsBigInt 

func (n NilStringColumnValue) AsBigInt() (BigIntNumber, error)

AsBigInt: Failed to convert to integer

func (NilStringColumnValue) AsBool 

func (n NilStringColumnValue) AsBool() (bool, error)

AsBool: Failed to convert to boolean

func (NilStringColumnValue) AsBytes 

func (n NilStringColumnValue) AsBytes() ([]byte, error)

AsBytes: Failed to convert to byte stream

func (NilStringColumnValue) AsDecimal 

func (n NilStringColumnValue) AsDecimal() (DecimalNumber, error)

AsDecimal: Failed to convert to high-precision real number

func (NilStringColumnValue) AsString 

func (n NilStringColumnValue) AsString() (string, error)

AsString: Failed to convert to string

func (NilStringColumnValue) AsTime 

func (n NilStringColumnValue) AsTime() (time.Time, error)

AsTime: Failed to convert to time

func (*NilStringColumnValue) Clone 

func (n *NilStringColumnValue) Clone() ColumnValue

Clone - Clone the null string value

func (NilStringColumnValue) IsNil 

func (n NilStringColumnValue) IsNil() bool

IsNil: Whether it is null

func (NilStringColumnValue) String 

func (n NilStringColumnValue) String() string

String: Printing display

func (*NilStringColumnValue) Type 

func (n *NilStringColumnValue) Type() ColumnType

Type - Column type

type NilTimeColumnValue 

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

NilTimeColumnValue represents an empty time column value

func (NilTimeColumnValue) AsBigInt 

func (n NilTimeColumnValue) AsBigInt() (BigIntNumber, error)

AsBigInt: Failed to convert to integer

func (NilTimeColumnValue) AsBool 

func (n NilTimeColumnValue) AsBool() (bool, error)

AsBool: Failed to convert to boolean

func (NilTimeColumnValue) AsBytes 

func (n NilTimeColumnValue) AsBytes() ([]byte, error)

AsBytes: Failed to convert to byte stream

func (NilTimeColumnValue) AsDecimal 

func (n NilTimeColumnValue) AsDecimal() (DecimalNumber, error)

AsDecimal: Failed to convert to high-precision real number

func (NilTimeColumnValue) AsString 

func (n NilTimeColumnValue) AsString() (string, error)

AsString: Failed to convert to string

func (NilTimeColumnValue) AsTime 

func (n NilTimeColumnValue) AsTime() (time.Time, error)

AsTime: Failed to convert to time

func (*NilTimeColumnValue) Clone 

func (n *NilTimeColumnValue) Clone() ColumnValue

Clone clones an empty time column value

func (NilTimeColumnValue) IsNil 

func (n NilTimeColumnValue) IsNil() bool

IsNil: Whether it is null

func (NilTimeColumnValue) String 

func (n NilTimeColumnValue) String() string

String: Printing display

func (*NilTimeColumnValue) Type 

func (n *NilTimeColumnValue) Type() ColumnType

Type returns the type of the column

type Number 

type Number interface {
	Bool() (bool, error)
	String() string
}

Number - Numeric value

type NumberConverter 

type NumberConverter interface {
	ConvertBigIntFromInt(i int64) (num BigIntNumber)
	ConvertDecimalFromFloat(f float64) (num DecimalNumber)
	ConvertBigInt(s string) (num BigIntNumber, err error)
	ConvertDecimal(s string) (num DecimalNumber, err error)
}

NumberConverter - Number converter

type OldConverter 

type OldConverter struct{}

OldConverter - Unchecked conversion

func (*OldConverter) ConvertBigInt 

func (c *OldConverter) ConvertBigInt(s string) (num BigIntNumber, err error)

ConvertBigInt - Convert string to integer

func (*OldConverter) ConvertBigIntFromInt 

func (c *OldConverter) ConvertBigIntFromInt(i int64) (num BigIntNumber)

ConvertBigIntFromInt - Convert to decimal from integer

func (*OldConverter) ConvertDecimal 

func (c *OldConverter) ConvertDecimal(s string) (num DecimalNumber, err error)

ConvertDecimal - Convert string to decimal

func (*OldConverter) ConvertDecimalFromFloat 

func (c *OldConverter) ConvertDecimalFromFloat(f float64) (num DecimalNumber)

ConvertDecimalFromFloat - Convert to decimal from floating-point number

type Record 

type Record interface {
	fmt.Stringer

	Add(Column) error                      // AddColumn adds a new column to the record.
	GetByIndex(i int) (Column, error)      // GetColumnByIndex gets the column at index i.
	GetByName(name string) (Column, error) // GetColumnByName gets the column with the specified name.
	Set(i int, c Column) error             // SetColumnByIndex sets the value of the column at index i.
	Put(c Column) error                    // SetColumn sets the value of the specified column.
	ColumnNumber() int                     // GetColumnCount returns the number of columns in the record.
	ByteSize() int64                       // ByteSize returns the size of the record in bytes.
	MemorySize() int64                     // MemorySize returns the size of the record in memory.
}

Record represents a record in a dataset.

func GetTerminateRecord 

func GetTerminateRecord() Record

GetTerminateRecord gets the termination record.

type RecordChan 

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

RecordChan: Record channel. Fixes memory overflow issues.

func NewRecordChan 

func NewRecordChan(ctx context.Context) *RecordChan

NewRecordChan: Create a new record channel.

func NewRecordChanBuffer 

func NewRecordChanBuffer(ctx context.Context, n int) *RecordChan

NewRecordChanBuffer: Create a new record channel with a capacity of n.

func (*RecordChan) Buffered 

func (c *RecordChan) Buffered() int

Buffered: Number of elements currently buffered in the record channel.

func (*RecordChan) Close 

func (c *RecordChan) Close()

Close: Close the channel.

func (*RecordChan) PopFront 

func (c *RecordChan) PopFront() (r Record, ok bool)

PopFront: Remove and return the record at the front of the channel, and indicate whether there are more values remaining.

func (*RecordChan) PopFrontAll 

func (c *RecordChan) PopFrontAll(onRecord func(Record) error) error

PopFrontAll: Remove and return all records from the front of the channel using the onRecord function.

func (*RecordChan) PushBack 

func (c *RecordChan) PushBack(r Record) int

PushBack: Append a record r to the end of the channel and return the current size of the queue.

func (*RecordChan) PushBackAll 

func (c *RecordChan) PushBackAll(fetchRecord func() (Record, error)) error

PushBackAll: Append multiple records obtained through the fetchRecord function to the end of the channel.

type SetError 

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

SetError: Sets an error

func NewSetError 

func NewSetError(i interface{}, other ColumnType, err error) *SetError

NewSetError: Generates a setting error by setting the value i to the specified other type with the error err

func (*SetError) Error 

func (e *SetError) Error() string

func (*SetError) Unwrap 

func (e *SetError) Unwrap() error

type StringColumnValue 

type StringColumnValue struct {
	TimeEncoder
	// contains filtered or unexported fields
}

StringColumnValue - Value for a string column. Note: Decimal 123.0 (val:1230, exp:-1) is not equivalent to 123 (val:123, exp:0)

func (*StringColumnValue) AsBigInt 

func (s *StringColumnValue) AsBigInt() (BigIntNumber, error)

AsBigInt - Convert to a big integer. Floating-point numbers and scientific notation strings will be rounded. Non-numeric values will throw an error. E.g., 123.67 is converted to 123, and 123.12 is converted to 123.

func (*StringColumnValue) AsBool 

func (s *StringColumnValue) AsBool() (v bool, err error)

AsBool - Convert 1, t, T, TRUE, true, True to true Convert 0, f, F, FALSE, false, False to false. If none of the above, an error is thrown.

func (*StringColumnValue) AsBytes 

func (s *StringColumnValue) AsBytes() ([]byte, error)

AsBytes - Convert to a byte stream

func (*StringColumnValue) AsDecimal 

func (s *StringColumnValue) AsDecimal() (DecimalNumber, error)

AsDecimal - Convert to a decimal. Floating-point numbers and scientific notation strings can be converted. Non-numeric values will throw an error.

func (*StringColumnValue) AsString 

func (s *StringColumnValue) AsString() (string, error)

AsString - Convert to a string

func (*StringColumnValue) AsTime 

func (s *StringColumnValue) AsTime() (t time.Time, err error)

AsTime - Convert to a time based on the time encoder. If the format does not match the time encoder, an error is thrown.

func (*StringColumnValue) Clone 

func (s *StringColumnValue) Clone() ColumnValue

Clone - Clone the string column value

func (*StringColumnValue) Cmp 

func (s *StringColumnValue) Cmp(right ColumnValue) (int, error)

Cmp - Return 1 for greater than, 0 for equal, -1 for less than

func (*StringColumnValue) IsNil 

func (n *StringColumnValue) IsNil() bool

IsNil: Whether it is null

func (*StringColumnValue) String 

func (s *StringColumnValue) String() string

func (*StringColumnValue) Type 

func (s *StringColumnValue) Type() ColumnType

Type - Column type

type StringTimeDecoder 

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

StringTimeDecoder - String time decoder

func (*StringTimeDecoder) Layout 

func (d *StringTimeDecoder) Layout() string

Layout - Time format

func (*StringTimeDecoder) TimeDecode 

func (d *StringTimeDecoder) TimeDecode(t time.Time) (interface{}, error)

TimeDecode - Decode a string time based on the layout of the go time format into a string

type StringTimeEncoder 

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

StringTimeEncoder - String time encoder

func (*StringTimeEncoder) TimeEncode 

func (e *StringTimeEncoder) TimeEncode(i interface{}) (time.Time, error)

TimeEncode - Encode to time. If 'i' is not a string or not in the layout format, an error will be reported.

type TerminateRecord 

type TerminateRecord struct{}

TerminateRecord represents a termination record.

func (*TerminateRecord) Add 

func (t *TerminateRecord) Add(Column) error

Add is an empty method placeholder.

func (*TerminateRecord) ByteSize 

func (t *TerminateRecord) ByteSize() int64

ByteSize is an empty method placeholder.

func (*TerminateRecord) ColumnNumber 

func (t *TerminateRecord) ColumnNumber() int

ColumnNumber is an empty method placeholder.

func (*TerminateRecord) GetByIndex 

func (t *TerminateRecord) GetByIndex(i int) (Column, error)

GetByIndex is an empty method placeholder.

func (*TerminateRecord) GetByName 

func (t *TerminateRecord) GetByName(name string) (Column, error)

GetByName is an empty method placeholder.

func (*TerminateRecord) MemorySize 

func (t *TerminateRecord) MemorySize() int64

MemorySize is an empty method placeholder.

func (*TerminateRecord) Put 

func (t *TerminateRecord) Put(c Column) error

Put is an empty method placeholder.

func (*TerminateRecord) Set 

func (t *TerminateRecord) Set(i int, c Column) error

Set is an empty method placeholder.

func (*TerminateRecord) String 

func (t *TerminateRecord) String() string

String is an empty method placeholder.

type TimeColumnValue 

type TimeColumnValue struct {
	TimeDecoder // Time decoder
	// contains filtered or unexported fields
}

TimeColumnValue represents a time column value

func (*TimeColumnValue) AsBigInt 

func (t *TimeColumnValue) AsBigInt() (BigIntNumber, error)

AsBigInt: Cannot convert to a big integer

func (*TimeColumnValue) AsBool 

func (t *TimeColumnValue) AsBool() (bool, error)

AsBool: Cannot convert to a boolean value

func (*TimeColumnValue) AsBytes 

func (t *TimeColumnValue) AsBytes() (b []byte, err error)

AsBytes: Converts to a byte stream

func (*TimeColumnValue) AsDecimal 

func (t *TimeColumnValue) AsDecimal() (DecimalNumber, error)

AsDecimal: Cannot convert to a high-precision decimal number

func (*TimeColumnValue) AsString 

func (t *TimeColumnValue) AsString() (s string, err error)

AsString: Converts to a string

func (*TimeColumnValue) AsTime 

func (t *TimeColumnValue) AsTime() (time.Time, error)

AsTime: Converts to a time value

func (*TimeColumnValue) Clone 

func (t *TimeColumnValue) Clone() ColumnValue

Clone clones a time column value

func (*TimeColumnValue) Cmp 

func (t *TimeColumnValue) Cmp(right ColumnValue) (int, error)

Cmp: Returns 1 for greater than, 0 for equal, and -1 for less than

func (*TimeColumnValue) IsNil 

func (n *TimeColumnValue) IsNil() bool

IsNil: Whether it is null

func (*TimeColumnValue) String 

func (t *TimeColumnValue) String() string

func (*TimeColumnValue) Type 

func (t *TimeColumnValue) Type() ColumnType

Type returns the type of the column

type TimeDecoder 

type TimeDecoder interface {
	TimeDecode(t time.Time) (interface{}, error)
	Layout() string
}

TimeDecoder - Time decoder

func NewStringTimeDecoder 

func NewStringTimeDecoder(layout string) TimeDecoder

NewStringTimeDecoder - A string time decoder based on the layout of the go time format

type TimeEncoder 

type TimeEncoder interface {
	TimeEncode(i interface{}) (time.Time, error)
}

TimeEncoder - Time encoder

func NewStringTimeEncoder 

func NewStringTimeEncoder(layout string) TimeEncoder

NewStringTimeEncoder - A string time encoder based on the layout of the go time format

type TransformError 

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

TransformError: Conversion error

func NewTransformError 

func NewTransformError(msg string, err error) *TransformError

NewTransformError: Creates a conversion error based on the message msg and error err

func NewTransformErrorFormColumnTypes 

func NewTransformErrorFormColumnTypes(one, other ColumnType, err error) *TransformError

NewTransformErrorFromColumnTypes: Generates a conversion error from the error err when converting from type one to type other

func NewTransformErrorFormString 

func NewTransformErrorFormString(one, other string, err error) *TransformError

NewTransformErrorFromString: Generates a conversion error from the error err when converting from one to other

func (*TransformError) Error 

func (e *TransformError) Error() string

func (*TransformError) Unwrap 

func (e *TransformError) Unwrap() error

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