sessionexpr

package
v1.1.0-beta.0...-8e1a47d Latest Latest
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 Go to latest Published: Dec 26, 2024 License: Apache-2.0 Imports: 22 Imported by: 0

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Constants

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Variables

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Functions

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Types

type EvalContext 

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

EvalContext implements the `expression.EvalContext` interface to provide evaluation context in session.

func NewEvalContext 

func NewEvalContext(sctx sessionctx.Context) *EvalContext

NewEvalContext creates a new EvalContext.

func (*EvalContext) AllParamValues 

func (ctx *EvalContext) AllParamValues() []types.Datum

AllParamValues implements context.StaticConvertibleEvalContext.

func (*EvalContext) AppendNote 

func (ctx *EvalContext) AppendNote(err error)

AppendNote appends notes to the context.

func (*EvalContext) AppendWarning 

func (ctx *EvalContext) AppendWarning(err error)

AppendWarning append warnings to the context.

func (*EvalContext) CopyWarnings 

func (ctx *EvalContext) CopyWarnings(dst []contextutil.SQLWarn) []contextutil.SQLWarn

CopyWarnings copies the warnings to dst

func (*EvalContext) CtxID 

func (ctx *EvalContext) CtxID() uint64

CtxID returns the context id.

func (*EvalContext) CurrentDB 

func (ctx *EvalContext) CurrentDB() string

CurrentDB returns the current database name

func (*EvalContext) CurrentTime 

func (ctx *EvalContext) CurrentTime() (time.Time, error)

CurrentTime returns the current time

func (*EvalContext) ErrCtx 

func (ctx *EvalContext) ErrCtx() errctx.Context

ErrCtx returns the errctx.Context

func (*EvalContext) GetDefaultWeekFormatMode 

func (ctx *EvalContext) GetDefaultWeekFormatMode() string

GetDefaultWeekFormatMode returns the value of the 'default_week_format' system variable.

func (*EvalContext) GetDivPrecisionIncrement 

func (ctx *EvalContext) GetDivPrecisionIncrement() int

GetDivPrecisionIncrement returns the specified value of DivPrecisionIncrement.

func (*EvalContext) GetMaxAllowedPacket 

func (ctx *EvalContext) GetMaxAllowedPacket() uint64

GetMaxAllowedPacket returns the value of the 'max_allowed_packet' system variable.

func (*EvalContext) GetOptionalPropProvider 

func (ctx *EvalContext) GetOptionalPropProvider(key exprctx.OptionalEvalPropKey) (exprctx.OptionalEvalPropProvider, bool)

GetOptionalPropProvider gets the optional property provider by key

func (*EvalContext) GetOptionalPropSet 

func (ctx *EvalContext) GetOptionalPropSet() exprctx.OptionalEvalPropKeySet

GetOptionalPropSet gets the optional property set from context

func (*EvalContext) GetParamValue 

func (ctx *EvalContext) GetParamValue(idx int) (types.Datum, error)

GetParamValue returns the value of the parameter by index.

func (*EvalContext) GetTiDBRedactLog 

func (ctx *EvalContext) GetTiDBRedactLog() string

GetTiDBRedactLog returns the value of the 'tidb_redact_log' system variable.

func (*EvalContext) GetUserVarsReader 

func (ctx *EvalContext) GetUserVarsReader() variable.UserVarsReader

GetUserVarsReader returns the user variables.

func (*EvalContext) GetWarnHandler 

func (ctx *EvalContext) GetWarnHandler() contextutil.WarnHandler

GetWarnHandler implements context.StaticConvertibleEvalContext.

func (*EvalContext) IntoStatic 

func (ctx *EvalContext) IntoStatic() *exprstatic.EvalContext

IntoStatic turns the EvalContext into a EvalContext.

func (*EvalContext) Location 

func (ctx *EvalContext) Location() *time.Location

Location returns the timezone info

func (*EvalContext) RequestDynamicVerification 

func (ctx *EvalContext) RequestDynamicVerification(privName string, grantable bool) bool

RequestDynamicVerification verifies user privilege for a DYNAMIC privilege.

func (*EvalContext) RequestVerification 

func (ctx *EvalContext) RequestVerification(db, table, column string, priv mysql.PrivilegeType) bool

RequestVerification verifies user privilege

func (*EvalContext) SQLMode 

func (ctx *EvalContext) SQLMode() mysql.SQLMode

SQLMode returns the sql mode

func (*EvalContext) Sctx 

func (ctx *EvalContext) Sctx() sessionctx.Context

Sctx returns the innert session context

func (*EvalContext) TruncateWarnings 

func (ctx *EvalContext) TruncateWarnings(start int) []contextutil.SQLWarn

TruncateWarnings truncates warnings begin from start and returns the truncated warnings.

func (*EvalContext) TypeCtx 

func (ctx *EvalContext) TypeCtx() (tc types.Context)

TypeCtx returns the types.Context

func (*EvalContext) WarningCount 

func (ctx *EvalContext) WarningCount() int

WarningCount gets warning count.

type ExprContext 

type ExprContext struct {
	*EvalContext
	// contains filtered or unexported fields
}

ExprContext implements `ExprContext`

func NewExprContext 

func NewExprContext(sctx sessionctx.Context) *ExprContext

NewExprContext creates a new ExprContext.

func (*ExprContext) AllocPlanColumnID 

func (ctx *ExprContext) AllocPlanColumnID() int64

AllocPlanColumnID allocates column id for plan.

func (*ExprContext) ConnectionID 

func (ctx *ExprContext) ConnectionID() uint64

ConnectionID indicates the connection ID of the current session. If the context is not in a session, it should return 0.

func (*ExprContext) GetBlockEncryptionMode 

func (ctx *ExprContext) GetBlockEncryptionMode() string

GetBlockEncryptionMode returns the variable block_encryption_mode

func (*ExprContext) GetCharsetInfo 

func (ctx *ExprContext) GetCharsetInfo() (string, string)

GetCharsetInfo gets charset and collation for current context.

func (*ExprContext) GetDefaultCollationForUTF8MB4 

func (ctx *ExprContext) GetDefaultCollationForUTF8MB4() string

GetDefaultCollationForUTF8MB4 returns the default collation of UTF8MB4.

func (*ExprContext) GetEvalCtx 

func (ctx *ExprContext) GetEvalCtx() exprctx.EvalContext

GetEvalCtx returns the EvalContext.

func (*ExprContext) GetGroupConcatMaxLen 

func (ctx *ExprContext) GetGroupConcatMaxLen() uint64

GetGroupConcatMaxLen returns the value of the 'group_concat_max_len' system variable.

func (*ExprContext) GetLastPlanColumnID 

func (ctx *ExprContext) GetLastPlanColumnID() int64

GetLastPlanColumnID implements context.StaticConvertibleExprContext.

func (*ExprContext) GetNoopFuncsMode 

func (ctx *ExprContext) GetNoopFuncsMode() int

GetNoopFuncsMode returns the noop function mode: OFF/ON/WARN values as 0/1/2.

func (*ExprContext) GetPlanCacheTracker 

func (ctx *ExprContext) GetPlanCacheTracker() *contextutil.PlanCacheTracker

GetPlanCacheTracker implements context.StaticConvertibleExprContext.

func (*ExprContext) GetStaticConvertibleEvalContext 

func (ctx *ExprContext) GetStaticConvertibleEvalContext() exprctx.StaticConvertibleEvalContext

GetStaticConvertibleEvalContext implements context.StaticConvertibleExprContext.

func (*ExprContext) GetSysdateIsNow 

func (ctx *ExprContext) GetSysdateIsNow() bool

GetSysdateIsNow returns a bool to determine whether Sysdate is an alias of Now function. It is the value of variable `tidb_sysdate_is_now`.

func (*ExprContext) GetWindowingUseHighPrecision 

func (ctx *ExprContext) GetWindowingUseHighPrecision() bool

GetWindowingUseHighPrecision determines whether to compute window operations without loss of precision. see https://dev.mysql.com/doc/refman/8.0/en/window-function-optimization.html for more details.

func (*ExprContext) IntoStatic 

func (ctx *ExprContext) IntoStatic() *exprstatic.ExprContext

IntoStatic turns the ExprContext into a ExprContext.

func (*ExprContext) IsConstantPropagateCheck 

func (ctx *ExprContext) IsConstantPropagateCheck() bool

IsConstantPropagateCheck returns whether the ctx is in constant propagate check.

func (*ExprContext) IsInNullRejectCheck 

func (ctx *ExprContext) IsInNullRejectCheck() bool

IsInNullRejectCheck returns whether the expression is in null reject check.

func (*ExprContext) IsReadonlyUserVar 

func (ctx *ExprContext) IsReadonlyUserVar(name string) bool

IsReadonlyUserVar checks whether the user variable is readonly.

func (*ExprContext) IsUseCache 

func (ctx *ExprContext) IsUseCache() bool

IsUseCache indicates whether to cache the build expression in plan cache. If SetSkipPlanCache is invoked, it should return false.

func (*ExprContext) Rng 

func (ctx *ExprContext) Rng() *mathutil.MysqlRng

Rng is used to generate random values.

func (*ExprContext) SetSkipPlanCache 

func (ctx *ExprContext) SetSkipPlanCache(reason string)

SetSkipPlanCache sets to skip the plan cache and records the reason.

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