expropt

package
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 Go to latest Published: Sep 22, 2024 License: Apache-2.0 Imports: 11 Imported by: 0

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Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type AdvisoryLockContext 

type AdvisoryLockContext interface {
	// GetAdvisoryLock acquires an advisory lock (aka GET_LOCK()).
	GetAdvisoryLock(string, int64) error
	// IsUsedAdvisoryLock checks for existing locks (aka IS_USED_LOCK()).
	IsUsedAdvisoryLock(string) uint64
	// ReleaseAdvisoryLock releases an advisory lock (aka RELEASE_LOCK()).
	ReleaseAdvisoryLock(string) bool
	// ReleaseAllAdvisoryLocks releases all advisory locks that this session holds.
	ReleaseAllAdvisoryLocks() int
}

AdvisoryLockContext is the interface to operate advisory locks

type AdvisoryLockPropProvider 

type AdvisoryLockPropProvider struct {
	AdvisoryLockContext
}

AdvisoryLockPropProvider is a provider to provide AdvisoryLockContext.

func NewAdvisoryLockPropProvider 

func NewAdvisoryLockPropProvider(ctx AdvisoryLockContext) *AdvisoryLockPropProvider

NewAdvisoryLockPropProvider creates a new AdvisoryLockPropProvider

func (*AdvisoryLockPropProvider) Desc 

func (p *AdvisoryLockPropProvider) Desc() *exprctx.OptionalEvalPropDesc

Desc returns the description for the property key.

type AdvisoryLockPropReader 

type AdvisoryLockPropReader struct{}

AdvisoryLockPropReader is used by expression to operate advisory lock

func (AdvisoryLockPropReader) AdvisoryLockCtx 

func (r AdvisoryLockPropReader) AdvisoryLockCtx(ctx exprctx.EvalContext) (AdvisoryLockContext, error)

AdvisoryLockCtx returns the AdvisoryLockContext from the context

func (AdvisoryLockPropReader) RequiredOptionalEvalProps 

func (r AdvisoryLockPropReader) RequiredOptionalEvalProps() exprctx.OptionalEvalPropKeySet

RequiredOptionalEvalProps implements the RequireOptionalEvalProps interface.

type CurrentUserPropProvider 

type CurrentUserPropProvider func() (*auth.UserIdentity, []*auth.RoleIdentity)

CurrentUserPropProvider is a provider to get the current user

func (CurrentUserPropProvider) Desc 

func (p CurrentUserPropProvider) Desc() *exprctx.OptionalEvalPropDesc

Desc returns the description for the property key.

type CurrentUserPropReader 

type CurrentUserPropReader struct{}

CurrentUserPropReader is used by expression to read property context.OptPropCurrentUser

func (CurrentUserPropReader) ActiveRoles 

func (r CurrentUserPropReader) ActiveRoles(ctx exprctx.EvalContext) ([]*auth.RoleIdentity, error)

ActiveRoles returns the active roles

func (CurrentUserPropReader) CurrentUser 

func (r CurrentUserPropReader) CurrentUser(ctx exprctx.EvalContext) (*auth.UserIdentity, error)

CurrentUser returns the current user

func (CurrentUserPropReader) RequiredOptionalEvalProps 

func (r CurrentUserPropReader) RequiredOptionalEvalProps() exprctx.OptionalEvalPropKeySet

RequiredOptionalEvalProps implements the RequireOptionalEvalProps interface.

type DDLOwnerInfoProvider 

type DDLOwnerInfoProvider func() bool

DDLOwnerInfoProvider is used to provide the DDL owner information. It is a function to return whether the current node is ddl owner

func (DDLOwnerInfoProvider) Desc 

func (p DDLOwnerInfoProvider) Desc() *exprctx.OptionalEvalPropDesc

Desc returns the description for the property key.

type DDLOwnerPropReader 

type DDLOwnerPropReader struct{}

DDLOwnerPropReader is used by expression to get the DDL owner information.

func (DDLOwnerPropReader) IsDDLOwner 

func (r DDLOwnerPropReader) IsDDLOwner(ctx exprctx.EvalContext) (bool, error)

IsDDLOwner returns whether the current node is DDL owner

func (DDLOwnerPropReader) RequiredOptionalEvalProps 

func (r DDLOwnerPropReader) RequiredOptionalEvalProps() exprctx.OptionalEvalPropKeySet

RequiredOptionalEvalProps implements the RequireOptionalEvalProps interface.

type InfoSchemaPropProvider 

type InfoSchemaPropProvider func(isDomain bool) infoschema.MetaOnlyInfoSchema

InfoSchemaPropProvider is the function to provide information schema.

func (InfoSchemaPropProvider) Desc 

func (InfoSchemaPropProvider) Desc() *exprctx.OptionalEvalPropDesc

Desc returns the description for the property key.

type InfoSchemaPropReader 

type InfoSchemaPropReader struct{}

InfoSchemaPropReader is used to get the information schema.

func (InfoSchemaPropReader) GetDomainInfoSchema 

func (InfoSchemaPropReader) GetDomainInfoSchema(ctx exprctx.EvalContext) (infoschema.MetaOnlyInfoSchema, error)

GetDomainInfoSchema return domain information schema.

func (InfoSchemaPropReader) GetSessionInfoSchema 

func (InfoSchemaPropReader) GetSessionInfoSchema(ctx exprctx.EvalContext) (infoschema.MetaOnlyInfoSchema, error)

GetSessionInfoSchema returns session information schema.

func (InfoSchemaPropReader) RequiredOptionalEvalProps 

func (InfoSchemaPropReader) RequiredOptionalEvalProps() exprctx.OptionalEvalPropKeySet

RequiredOptionalEvalProps implements the RequireOptionalEvalProps interface.

type KVStorePropProvider 

type KVStorePropProvider func() kv.Storage

KVStorePropProvider is used to provide kv.Storage for context

func (KVStorePropProvider) Desc 

func (KVStorePropProvider) Desc() *exprctx.OptionalEvalPropDesc

Desc returns the description for the property key.

type KVStorePropReader 

type KVStorePropReader struct{}

KVStorePropReader is used by expression to get kv.Storage.

func (KVStorePropReader) GetKVStore 

func (KVStorePropReader) GetKVStore(ctx exprctx.EvalContext) (kv.Storage, error)

GetKVStore returns a SequenceOperator.

func (KVStorePropReader) RequiredOptionalEvalProps 

func (KVStorePropReader) RequiredOptionalEvalProps() exprctx.OptionalEvalPropKeySet

RequiredOptionalEvalProps implements the RequireOptionalEvalProps interface.

type OptionalEvalPropProviders 

type OptionalEvalPropProviders [exprctx.OptPropsCnt]exprctx.OptionalEvalPropProvider

OptionalEvalPropProviders contains some evaluation property providers in EvalContext.

func (*OptionalEvalPropProviders) Add 

func (o *OptionalEvalPropProviders) Add(val exprctx.OptionalEvalPropProvider)

Add adds an optional property

func (*OptionalEvalPropProviders) Contains 

func (o *OptionalEvalPropProviders) Contains(key exprctx.OptionalEvalPropKey) bool

Contains checks whether the provider by key exists.

func (*OptionalEvalPropProviders) Get 

func (o *OptionalEvalPropProviders) Get(key exprctx.OptionalEvalPropKey) (exprctx.OptionalEvalPropProvider, bool)

Get gets the provider by key.

func (*OptionalEvalPropProviders) PropKeySet 

func (o *OptionalEvalPropProviders) PropKeySet() (set exprctx.OptionalEvalPropKeySet)

PropKeySet returns the set for optional evaluation properties in EvalContext.

type RequireOptionalEvalProps 

type RequireOptionalEvalProps interface {
	// RequiredOptionalEvalProps returns the optional properties that this function requires.
	// If the returned `OptionalEvalPropKeySet` is empty,
	// it means this function does not require any optional properties.
	RequiredOptionalEvalProps() exprctx.OptionalEvalPropKeySet
}

RequireOptionalEvalProps is the interface for the function that requires optional evaluation properties or not.

type SQLExecutor 

type SQLExecutor interface {
	ExecRestrictedSQL(
		ctx context.Context,
		opts []sqlexec.OptionFuncAlias,
		sql string,
		args ...any,
	) ([]chunk.Row, []*resolve.ResultField, error)
}

SQLExecutor is the interface for SQL executing in expression. We do not `sqlexec.SQLExecutor` to limit expression to use specified methods only.

type SQLExecutorPropProvider 

type SQLExecutorPropProvider func() (SQLExecutor, error)

SQLExecutorPropProvider provides the SQLExecutor

func (SQLExecutorPropProvider) Desc 

func (SQLExecutorPropProvider) Desc() *exprctx.OptionalEvalPropDesc

Desc returns the description for the property key.

type SQLExecutorPropReader 

type SQLExecutorPropReader struct{}

SQLExecutorPropReader is used by expression to get sql executor

func (SQLExecutorPropReader) GetSQLExecutor 

func (SQLExecutorPropReader) GetSQLExecutor(ctx exprctx.EvalContext) (SQLExecutor, error)

GetSQLExecutor returns a SQLExecutor.

func (SQLExecutorPropReader) RequiredOptionalEvalProps 

func (SQLExecutorPropReader) RequiredOptionalEvalProps() exprctx.OptionalEvalPropKeySet

RequiredOptionalEvalProps implements the RequireOptionalEvalProps interface.

type SequenceOperator 

type SequenceOperator interface {
	// GetSequenceID gets the sequence id.
	GetSequenceID() int64
	// GetSequenceNextVal gets the next value of the sequence.
	GetSequenceNextVal() (int64, error)
	// SetSequenceVal sets the sequence value.
	// The returned bool indicates the newVal is already under the base.
	SetSequenceVal(newVal int64) (int64, bool, error)
}

SequenceOperator is the interface for to operate sequence.

type SequenceOperatorPropReader 

type SequenceOperatorPropReader struct{}

SequenceOperatorPropReader is used by expression to get SequenceOperator.

func (SequenceOperatorPropReader) GetSequenceOperator 

func (SequenceOperatorPropReader) GetSequenceOperator(ctx exprctx.EvalContext, db, name string) (SequenceOperator, error)

GetSequenceOperator returns a SequenceOperator.

func (SequenceOperatorPropReader) RequiredOptionalEvalProps 

func (SequenceOperatorPropReader) RequiredOptionalEvalProps() exprctx.OptionalEvalPropKeySet

RequiredOptionalEvalProps implements the RequireOptionalEvalProps interface.

type SequenceOperatorProvider 

type SequenceOperatorProvider func(db, name string) (SequenceOperator, error)

SequenceOperatorProvider is the function to provide SequenceOperator.

func (SequenceOperatorProvider) Desc 

func (SequenceOperatorProvider) Desc() *exprctx.OptionalEvalPropDesc

Desc returns the description for the property key.

type SessionVarsPropProvider 

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

SessionVarsPropProvider is a provider to get the session variables

func NewSessionVarsProvider 

func NewSessionVarsProvider(provider variable.SessionVarsProvider) *SessionVarsPropProvider

NewSessionVarsProvider returns a new SessionVarsPropProvider

func (*SessionVarsPropProvider) Desc 

func (p *SessionVarsPropProvider) Desc() *exprctx.OptionalEvalPropDesc

Desc implements the OptionalEvalPropProvider interface.

type SessionVarsPropReader 

type SessionVarsPropReader struct{}

SessionVarsPropReader is used by expression to read property context.OptPropSessionVars

func (SessionVarsPropReader) GetSessionVars 

func (SessionVarsPropReader) GetSessionVars(ctx exprctx.EvalContext) (*variable.SessionVars, error)

GetSessionVars returns the session vars from the context

func (SessionVarsPropReader) RequiredOptionalEvalProps 

func (SessionVarsPropReader) RequiredOptionalEvalProps() exprctx.OptionalEvalPropKeySet

RequiredOptionalEvalProps implements the RequireOptionalEvalProps interface.

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