executor

package
v1.1.0-beta.0...-70f5218 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Nov 28, 2024 License: Apache-2.0 Imports: 245 Imported by: 0

Documentation

Index

Constants

View Source 
const LoadDataReaderBuilderKey loadDataVarKeyType = 1

LoadDataReaderBuilderKey stores the reader channel that reads from the connection.

View Source 
const LoadDataVarKey loadDataVarKeyType = 0

LoadDataVarKey is a variable key for load data.

View Source 
const LoadStatsVarKey loadStatsVarKeyType = 0

LoadStatsVarKey is a variable key for load statistic.

View Source 
const PlanReplayerDumpVarKey planReplayerDumpKeyType = 1

PlanReplayerDumpVarKey is a variable key for plan replayer dump.

View Source 
const PlanReplayerLoadVarKey planReplayerLoadKeyType = 0

PlanReplayerLoadVarKey is a variable key for plan replayer load.

Variables

View Source 
var (
	// RandSeed is the seed for randing package.
	// It's public for test.
	RandSeed = int64(1)

	// MaxRegionSampleSize is the max sample size for one region when analyze v1 collects samples from table.
	// It's public for test.
	MaxRegionSampleSize = int64(1000)
)
View Source 
var (

	// GlobalMemoryUsageTracker is the ancestor of all the Executors' memory tracker and GlobalMemory Tracker
	GlobalMemoryUsageTracker *memory.Tracker
	// GlobalDiskUsageTracker is the ancestor of all the Executors' disk tracker
	GlobalDiskUsageTracker *disk.Tracker
	// GlobalAnalyzeMemoryTracker is the ancestor of all the Analyze jobs' memory tracker and child of global Tracker
	GlobalAnalyzeMemoryTracker *memory.Tracker
)
View Source 
var (
	// AnalyzeProgressTest is for test.
	AnalyzeProgressTest struct{}
)
View Source 
var (

	// CheckTableFastBucketSize is the bucket size of fast check table.
	CheckTableFastBucketSize = atomic.Int64{}
)
View Source 
var CloseSession func(ctx sessionctx.Context)

CloseSession will be assigned by session package.

View Source 
var CreateSession func(ctx sessionctx.Context) (sessionctx.Context, error)

CreateSession will be assigned by session package.

View Source 
var ErrSavepointNotSupportedWithBinlog = errors.New("SAVEPOINT is not supported when binlog is enabled")

ErrSavepointNotSupportedWithBinlog export for testing.

View Source 
var (

	// IndexMergeCancelFuncForTest is used just for test
	IndexMergeCancelFuncForTest func()
)
View Source 
var LookupTableTaskChannelSize int32 = 50

LookupTableTaskChannelSize represents the channel size of the index double read taskChan.

View Source 
var ParseSlowLogBatchSize = 64

ParseSlowLogBatchSize is the batch size of slow-log lines for a worker to parse, exported for testing.

View Source 
var QueryReplacer = strings.NewReplacer("\r", " ", "\n", " ", "\t", " ")

QueryReplacer replaces new line and tab for grep result including query string.

View Source 
var SplitBatchCreateTableForTest = splitBatchCreateTable

SplitBatchCreateTableForTest is only used for test.

View Source 
var TestSetConfigHTTPHandlerKey stringutil.StringerStr = "TestSetConfigHTTPHandlerKey"

TestSetConfigHTTPHandlerKey is used as the key to store 'TestSetConfigDoRequestFunc' in the context.

View Source 
var TestSetConfigServerInfoKey stringutil.StringerStr = "TestSetConfigServerInfoKey"

TestSetConfigServerInfoKey is used as the key to store 'TestSetConfigServerInfoFunc' in the context.

View Source 
var TestShowClusterConfigKey stringutil.StringerStr = "TestShowClusterConfigKey"

TestShowClusterConfigKey is the key used to store TestShowClusterConfigFunc.

Functions

func AddNewAnalyzeJob 

func AddNewAnalyzeJob(ctx sessionctx.Context, job *statistics.AnalyzeJob)

AddNewAnalyzeJob records the new analyze job.

func BRIECreateDatabase 

func BRIECreateDatabase(sctx sessionctx.Context, schema *model.DBInfo, brComment string) error

BRIECreateDatabase creates the database with OnExistIgnore option

func BRIECreateTable 

func BRIECreateTable(
	sctx sessionctx.Context,
	dbName pmodel.CIStr,
	table *model.TableInfo,
	brComment string,
	cs ...ddl.CreateTableOption,
) error

BRIECreateTable creates the table with OnExistIgnore option

func BRIECreateTables 

func BRIECreateTables(
	sctx sessionctx.Context,
	tables map[string][]*model.TableInfo,
	brComment string,
	cs ...ddl.CreateTableOption,
) error

BRIECreateTables creates the tables with OnExistIgnore option in batch

func CalculateBatchSize 

func CalculateBatchSize(estRows, initBatchSize, maxBatchSize int) int

CalculateBatchSize calculates a suitable initial batch size. It exports for testing.

func ColumnName 

func ColumnName(column string) string

ColumnName returns `column`

func ConstructResultOfShowCreateDatabase 

func ConstructResultOfShowCreateDatabase(ctx sessionctx.Context, dbInfo *model.DBInfo, ifNotExists bool, buf *bytes.Buffer) (err error)

ConstructResultOfShowCreateDatabase constructs the result for show create database.

func ConstructResultOfShowCreatePlacementPolicy 

func ConstructResultOfShowCreatePlacementPolicy(policyInfo *model.PolicyInfo) string

ConstructResultOfShowCreatePlacementPolicy constructs the result for show create placement policy.

func ConstructResultOfShowCreateSequence 

func ConstructResultOfShowCreateSequence(ctx sessionctx.Context, tableInfo *model.TableInfo, buf *bytes.Buffer)

ConstructResultOfShowCreateSequence constructs the result for show create sequence.

func ConstructResultOfShowCreateTable 

func ConstructResultOfShowCreateTable(ctx sessionctx.Context, tableInfo *model.TableInfo, allocators autoid.Allocators, buf *bytes.Buffer) (err error)

ConstructResultOfShowCreateTable constructs the result for show create table.

func ConvertConfigItem2JSON 

func ConvertConfigItem2JSON(ctx sessionctx.Context, key string, val expression.Expression) (body string, err error)

ConvertConfigItem2JSON converts the config item specified by key and val to json. For example: 

set config x key="val" ==> {"key":"val"}
set config x key=233 ==> {"key":233}

func CountStmtNode 

func CountStmtNode(stmtNode ast.StmtNode, resolveCtx *resolve.Context, inRestrictedSQL bool, resourceGroup string)

CountStmtNode records the number of statements with the same type.

func DecodeRowValToChunk 

func DecodeRowValToChunk(sctx sessionctx.Context, schema *expression.Schema, tblInfo *model.TableInfo,
	handle kv.Handle, rowVal []byte, chk *chunk.Chunk, rd *rowcodec.ChunkDecoder) error

DecodeRowValToChunk decodes row value into chunk checking row format used.

func Detach 

func Detach(originalExecutor exec.Executor) (exec.Executor, bool)

Detach detaches the current executor from the session context. After detaching, the session context can be used to execute another statement while this executor is still running. The returning value shows whether this executor is able to be detached.

NOTE: the implementation of `Detach` should guarantee that no matter whether it returns true or false, both the original executor and the returning executor should be able to be used correctly. This restriction is to make sure that if `Detach(a)` returns `true`, while other children of `a`'s parent returns `false`, the caller can still use the original one.

func DumpRealOutfile 

func DumpRealOutfile(realBuf, lineBuf []byte, v float64, tp *types.FieldType) ([]byte, []byte)

DumpRealOutfile dumps a real number to lineBuf.

func FillOneImportJobInfo 

func FillOneImportJobInfo(info *importer.JobInfo, result *chunk.Chunk, importedRowCount int64)

FillOneImportJobInfo is exported for testing.

func FormatSQL 

func FormatSQL(sql string) stringutil.StringerFunc

FormatSQL is used to format the original SQL, e.g. truncating long SQL, appending prepared arguments.

func GenCascadeDeleteAST 

func GenCascadeDeleteAST(schema, table, idx pmodel.CIStr, cols []*model.ColumnInfo, fkValues [][]types.Datum) *ast.DeleteStmt

GenCascadeDeleteAST uses to generate cascade delete ast, export for test.

func GenCascadeSetNullAST 

func GenCascadeSetNullAST(schema, table, idx pmodel.CIStr, cols []*model.ColumnInfo, fkValues [][]types.Datum) *ast.UpdateStmt

GenCascadeSetNullAST uses to generate foreign key `SET NULL` ast, export for test.

func GenCascadeUpdateAST 

func GenCascadeUpdateAST(schema, table, idx pmodel.CIStr, cols []*model.ColumnInfo, couple *UpdatedValuesCouple) *ast.UpdateStmt

GenCascadeUpdateAST uses to generate cascade update ast, export for test.

func GetDropOrTruncateTableInfoFromJobs 

func GetDropOrTruncateTableInfoFromJobs(jobs []*model.Job, gcSafePoint uint64, dom *domain.Domain, fn func(*model.Job, *model.TableInfo) (bool, error)) (bool, error)

GetDropOrTruncateTableInfoFromJobs gets the dropped/truncated table information from DDL jobs, it will use the `start_ts` of DDL job as snapshot to get the dropped/truncated table information.

func GetEncodedPlan 

func GetEncodedPlan(stmtCtx *stmtctx.StatementContext, genHint bool) (encodedPlan, hintStr string)

GetEncodedPlan returned same as getEncodedPlan

func GetLackHandles 

func GetLackHandles(expectedHandles []kv.Handle, obtainedHandlesMap *kv.HandleMap) []kv.Handle

GetLackHandles gets the handles in expectedHandles but not in obtainedHandlesMap.

func GetPhysID 

func GetPhysID(tblInfo *model.TableInfo, idx *int) int64

GetPhysID returns the physical id used, either the table's id or a partition's ID

func GetPlanDigest 

func GetPlanDigest(stmtCtx *stmtctx.StatementContext) (string, *parser.Digest)

GetPlanDigest will try to get the select plan tree if the plan is select or the select plan of delete/update/insert statement.

func GetResultRowsCount 

func GetResultRowsCount(stmtCtx *stmtctx.StatementContext, p base.Plan) int64

GetResultRowsCount gets the count of the statement result rows.

func IsFastPlan 

func IsFastPlan(p base.Plan) bool

IsFastPlan exports for testing.

func LoadExprPushdownBlacklist 

func LoadExprPushdownBlacklist(sctx sessionctx.Context) (err error)

LoadExprPushdownBlacklist loads the latest data from table mysql.expr_pushdown_blacklist.

func LoadOptRuleBlacklist 

func LoadOptRuleBlacklist(ctx context.Context, sctx sessionctx.Context) (err error)

LoadOptRuleBlacklist loads the latest data from table mysql.opt_rule_blacklist.

func LockKeys 

func LockKeys(ctx context.Context, sctx sessionctx.Context, lockWaitTime int64, keys ...kv.Key) error

LockKeys locks the keys for pessimistic transaction.

func MockNewCacheTableSnapShot 

func MockNewCacheTableSnapShot(snapshot kv.Snapshot, memBuffer kv.MemBuffer) *cacheTableSnapshot

MockNewCacheTableSnapShot only serves for test.

func NewAnalyzeResultsNotifyWaitGroupWrapper 

func NewAnalyzeResultsNotifyWaitGroupWrapper(notify chan *statistics.AnalyzeResults) *analyzeResultsNotifyWaitGroupWrapper

NewAnalyzeResultsNotifyWaitGroupWrapper is to create analyzeResultsNotifyWaitGroupWrapper

func NewProfileBuilder 

func NewProfileBuilder(sctx sessionctx.Context, start, end time.Time, tp string) (*profileBuilder, error)

NewProfileBuilder returns a new profileBuilder.

func NewRowDecoder 

func NewRowDecoder(ctx sessionctx.Context, schema *expression.Schema, tbl *model.TableInfo) *rowcodec.ChunkDecoder

NewRowDecoder creates a chunk decoder for new row format row value decode.

func ParseTime 

func ParseTime(s string) (time.Time, error)

ParseTime exports for testing.

func ResetContextOfStmt 

func ResetContextOfStmt(ctx sessionctx.Context, s ast.StmtNode) (err error)

ResetContextOfStmt resets the StmtContext and session variables. Before every execution, we must clear statement context.

func ResetDeleteStmtCtx 

func ResetDeleteStmtCtx(sc *stmtctx.StatementContext, stmt *ast.DeleteStmt, vars *variable.SessionVars)

ResetDeleteStmtCtx resets statement context for DeleteStmt.

func ResetGlobalBRIEQueueForTest 

func ResetGlobalBRIEQueueForTest()

ResetGlobalBRIEQueueForTest resets the ID allocation for the global BRIE queue. In some of our test cases, we rely on the ID is allocated from 1. When batch executing test cases, the assumation may be broken and make the cases fail.

func ResetUpdateStmtCtx 

func ResetUpdateStmtCtx(sc *stmtctx.StatementContext, stmt *ast.UpdateStmt, vars *variable.SessionVars)

ResetUpdateStmtCtx resets statement context for UpdateStmt.

func SetFromString 

func SetFromString(value string) []string

SetFromString constructs a slice of strings from a comma separated string. It is assumed that there is no duplicated entry. You could use addToSet to maintain this property. It is exported for tests. I HOPE YOU KNOW WHAT YOU ARE DOING.

func Start 

func Start()

Start the backend components

func Stop 

func Stop()

Stop the backend components

func TableName 

func TableName(schema, table string) string

TableName returns `schema`.`table`

func ValidateImportIntoColAssignmentsWithEncodeCtx 

func ValidateImportIntoColAssignmentsWithEncodeCtx(plan *importer.Plan, assigns []*ast.Assignment) error

ValidateImportIntoColAssignmentsWithEncodeCtx validates the column assignment expressions should be compatible with the encoding context (which maybe different with the context in the current session). For example, the function `tidb_is_ddl_owner()` requires the optional eval properties which are not provided by the encoding context, so we should avoid using it in the column assignment expressions.

Types

type AdminPluginsExec 

type AdminPluginsExec struct {
	exec.BaseExecutor
	Action  core.AdminPluginsAction
	Plugins []string
}

AdminPluginsExec indicates AdminPlugins executor.

func (*AdminPluginsExec) Next 

func (e *AdminPluginsExec) Next(context.Context, *chunk.Chunk) error

Next implements the Executor Next interface.

type AdminShowBDRRoleExec 

type AdminShowBDRRoleExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

AdminShowBDRRoleExec represents a show BDR role executor.

func (*AdminShowBDRRoleExec) Next 

func (e *AdminShowBDRRoleExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

type AlterDDLJobExec 

type AlterDDLJobExec struct {
	exec.BaseExecutor

	AlterOpts []*core.AlterDDLJobOpt
	// contains filtered or unexported fields
}

AlterDDLJobExec indicates an Executor for alter config of a DDL Job.

func (*AlterDDLJobExec) Open 

func (e *AlterDDLJobExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type AnalyzeColumnsExec 

type AnalyzeColumnsExec struct {
	core.AnalyzeInfo
	// contains filtered or unexported fields
}

AnalyzeColumnsExec represents Analyze columns push down executor.

type AnalyzeColumnsExecV1 

type AnalyzeColumnsExecV1 struct {
	*AnalyzeColumnsExec
}

AnalyzeColumnsExecV1 is used to maintain v1 analyze process

type AnalyzeColumnsExecV2 

type AnalyzeColumnsExecV2 struct {
	*AnalyzeColumnsExec
}

AnalyzeColumnsExecV2 is used to maintain v2 analyze process

type AnalyzeExec 

type AnalyzeExec struct {
	exec.BaseExecutor

	OptionsMap map[int64]core.V2AnalyzeOptions
	// contains filtered or unexported fields
}

AnalyzeExec represents Analyze executor.

func (*AnalyzeExec) Next 

func (e *AnalyzeExec) Next(ctx context.Context, _ *chunk.Chunk) error

Next implements the Executor Next interface. It will collect all the sample task and run them concurrently.

type AnalyzeIndexExec 

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

AnalyzeIndexExec represents analyze index push down executor.

type BRIEExec 

type BRIEExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

BRIEExec represents an executor for BRIE statements (BACKUP, RESTORE, etc)

func (*BRIEExec) Next 

func (e *BRIEExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

type BatchPointGetExec 

type BatchPointGetExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

BatchPointGetExec executes a bunch of point select queries.

func (*BatchPointGetExec) Close 

func (e *BatchPointGetExec) Close() error

Close implements the Executor interface.

func (*BatchPointGetExec) Next 

func (e *BatchPointGetExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor interface.

func (*BatchPointGetExec) Open 

func (e *BatchPointGetExec) Open(context.Context) error

Open implements the Executor interface.

type CTEExec 

type CTEExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

CTEExec implements CTE. Following diagram describes how CTEExec works.

`iterInTbl` is shared by `CTEExec` and `CTETableReaderExec`. `CTETableReaderExec` reads data from `iterInTbl`, and its output will be stored `iterOutTbl` by `CTEExec`.

When an iteration ends, `CTEExec` will move all data from `iterOutTbl` into `iterInTbl`, which will be the input for new iteration. At the end of each iteration, data in `iterOutTbl` will also be added into `resTbl`. `resTbl` stores data of all iteration. 

                                  +----------+
                    write         |iterOutTbl|
      CTEExec ------------------->|          |
         |                        +----+-----+
   -------------                       | write
   |           |                       v
other op     other op             +----------+
(seed)       (recursive)          |  resTbl  |
                 ^                |          |
                 |                +----------+
           CTETableReaderExec
                  ^
                  |  read         +----------+
                  +---------------+iterInTbl |
                                  |          |
                                  +----------+

func (*CTEExec) Close 

func (e *CTEExec) Close() (firstErr error)

Close implements the Executor interface.

func (*CTEExec) Next 

func (e *CTEExec) Next(ctx context.Context, req *chunk.Chunk) (err error)

Next implements the Executor interface.

func (*CTEExec) Open 

func (e *CTEExec) Open(ctx context.Context) (err error)

Open implements the Executor interface.

type CTEStorages 

type CTEStorages struct {
	ResTbl    cteutil.Storage
	IterInTbl cteutil.Storage
	Producer  *cteProducer
}

CTEStorages stores resTbl and iterInTbl for CTEExec. There will be a map[CTEStorageID]*CTEStorages in StmtCtx, which will store all CTEStorages to make all shared CTEs use same the CTEStorages.

type CTETableReaderExec 

type CTETableReaderExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

CTETableReaderExec scans data in iterInTbl, which is filled by corresponding CTEExec.

func (*CTETableReaderExec) Close 

func (e *CTETableReaderExec) Close() (err error)

Close implements the Executor interface.

func (*CTETableReaderExec) Next 

func (e *CTETableReaderExec) Next(_ context.Context, req *chunk.Chunk) (err error)

Next implements the Executor interface.

func (*CTETableReaderExec) Open 

func (e *CTETableReaderExec) Open(ctx context.Context) error

Open implements the Executor interface.

type CancelDDLJobsExec 

type CancelDDLJobsExec struct {
	*CommandDDLJobsExec
}

CancelDDLJobsExec represents a cancel DDL jobs executor.

type CheckIndexRangeExec 

type CheckIndexRangeExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

CheckIndexRangeExec outputs the index values which has handle between begin and end.

func (*CheckIndexRangeExec) Close 

func (*CheckIndexRangeExec) Close() error

Close implements the Executor Close interface.

func (*CheckIndexRangeExec) Next 

func (e *CheckIndexRangeExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*CheckIndexRangeExec) Open 

func (e *CheckIndexRangeExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type CheckTableExec 

type CheckTableExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

CheckTableExec represents a check table executor. It is built from the "admin check table" statement, and it checks if the index matches the records in the table.

func (*CheckTableExec) Close 

func (e *CheckTableExec) Close() error

Close implements the Executor Close interface.

func (*CheckTableExec) Next 

func (e *CheckTableExec) Next(ctx context.Context, _ *chunk.Chunk) error

Next implements the Executor Next interface.

func (*CheckTableExec) Open 

func (e *CheckTableExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type ChecksumTableExec 

type ChecksumTableExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

ChecksumTableExec represents ChecksumTable executor.

func (*ChecksumTableExec) Next 

func (e *ChecksumTableExec) Next(_ context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*ChecksumTableExec) Open 

func (e *ChecksumTableExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type CleanupIndexExec 

type CleanupIndexExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

CleanupIndexExec represents a cleanup index executor. It is built from "admin cleanup index" statement, is used to delete dangling index data.

func (*CleanupIndexExec) Close 

func (*CleanupIndexExec) Close() error

Close implements the Executor Close interface.

func (*CleanupIndexExec) Next 

func (e *CleanupIndexExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*CleanupIndexExec) Open 

func (e *CleanupIndexExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type Closeable 

type Closeable interface {
	// Close closes the object.
	Close() error
}

Closeable is a interface for closeable structures.

type CommandDDLJobsExec 

type CommandDDLJobsExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

CommandDDLJobsExec is the general struct for Cancel/Pause/Resume commands on DDL jobs. These command currently by admin have the very similar struct and operations, it should be a better idea to have them in the same struct.

func (*CommandDDLJobsExec) Next 

func (e *CommandDDLJobsExec) Next(_ context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface for Cancel/Pause/Resume

func (*CommandDDLJobsExec) Open 

func (e *CommandDDLJobsExec) Open(ctx context.Context) error

Open implements the Executor for all Cancel/Pause/Resume command on DDL jobs just with different processes. And, it should not be called directly by the Executor.

type CompactTableTiFlashExec 

type CompactTableTiFlashExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

CompactTableTiFlashExec represents an executor for "ALTER TABLE [NAME] COMPACT TIFLASH REPLICA" statement.

func (*CompactTableTiFlashExec) Next 

func (e *CompactTableTiFlashExec) Next(ctx context.Context, chk *chunk.Chunk) error

Next implements the Executor Next interface.

type Compiler 

type Compiler struct {
	Ctx sessionctx.Context
}

Compiler compiles an ast.StmtNode to a physical plan.

func (*Compiler) Compile 

func (c *Compiler) Compile(ctx context.Context, stmtNode ast.StmtNode) (_ *ExecStmt, err error)

Compile compiles an ast.StmtNode to a physical plan.

type CoprocessorDAGHandler 

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

CoprocessorDAGHandler uses to handle cop dag request.

func NewCoprocessorDAGHandler 

func NewCoprocessorDAGHandler(sctx sessionctx.Context) *CoprocessorDAGHandler

NewCoprocessorDAGHandler creates a new CoprocessorDAGHandler.

func (*CoprocessorDAGHandler) HandleRequest 

func (h *CoprocessorDAGHandler) HandleRequest(ctx context.Context, req *coprocessor.Request) *coprocessor.Response

HandleRequest handles the coprocessor request.

func (*CoprocessorDAGHandler) HandleStreamRequest 

func (h *CoprocessorDAGHandler) HandleStreamRequest(ctx context.Context, req *coprocessor.Request, stream tikvpb.Tikv_CoprocessorStreamServer) error

HandleStreamRequest handles the coprocessor stream request.

type DDLExec 

type DDLExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

DDLExec represents a DDL executor. It grabs a DDL instance from Domain, calling the DDL methods to do the work.

func (*DDLExec) Next 

func (e *DDLExec) Next(ctx context.Context, _ *chunk.Chunk) (err error)

Next implements the Executor Next interface.

type DDLJobRetriever 

type DDLJobRetriever struct {
	TZLoc *time.Location
	// contains filtered or unexported fields
}

DDLJobRetriever retrieve the DDLJobs. nolint:structcheck

type DDLJobsReaderExec 

type DDLJobsReaderExec struct {
	exec.BaseExecutor
	DDLJobRetriever
	// contains filtered or unexported fields
}

DDLJobsReaderExec executes DDLJobs information retrieving.

func (*DDLJobsReaderExec) Close 

func (e *DDLJobsReaderExec) Close() error

Close implements the Executor Close interface.

func (*DDLJobsReaderExec) Next 

func (e *DDLJobsReaderExec) Next(_ context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*DDLJobsReaderExec) Open 

func (e *DDLJobsReaderExec) Open(ctx context.Context) error

Open implements the Executor Next interface.

type DeallocateExec 

type DeallocateExec struct {
	exec.BaseExecutor

	Name string
}

DeallocateExec represent a DEALLOCATE executor.

func (*DeallocateExec) Next 

func (e *DeallocateExec) Next(context.Context, *chunk.Chunk) error

Next implements the Executor Next interface.

type DeleteExec 

type DeleteExec struct {
	exec.BaseExecutor

	IsMultiTable bool
	// contains filtered or unexported fields
}

DeleteExec represents a delete executor. See https://dev.mysql.com/doc/refman/5.7/en/delete.html

func (*DeleteExec) Close 

func (e *DeleteExec) Close() error

Close implements the Executor Close interface.

func (*DeleteExec) GetFKCascades 

func (e *DeleteExec) GetFKCascades() []*FKCascadeExec

GetFKCascades implements WithForeignKeyTrigger interface.

func (*DeleteExec) GetFKChecks 

func (e *DeleteExec) GetFKChecks() []*FKCheckExec

GetFKChecks implements WithForeignKeyTrigger interface.

func (*DeleteExec) HasFKCascades 

func (e *DeleteExec) HasFKCascades() bool

HasFKCascades implements WithForeignKeyTrigger interface.

func (*DeleteExec) Next 

func (e *DeleteExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*DeleteExec) Open 

func (e *DeleteExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type ExecStmt 

type ExecStmt struct {
	// GoCtx stores parent go context.Context for a stmt.
	GoCtx context.Context
	// InfoSchema stores a reference to the schema information.
	InfoSchema infoschema.InfoSchema
	// Plan stores a reference to the final physical plan.
	Plan base.Plan

	StmtNode ast.StmtNode

	Ctx sessionctx.Context

	// LowerPriority represents whether to lower the execution priority of a query.
	LowerPriority bool

	// OutputNames will be set if using cached plan
	OutputNames []*types.FieldName
	PsStmt      *plannercore.PlanCacheStmt
	// contains filtered or unexported fields
}

ExecStmt implements the sqlexec.Statement interface, it builds a planner.Plan to an sqlexec.Statement.

func (*ExecStmt) CloseRecordSet 

func (a *ExecStmt) CloseRecordSet(txnStartTS uint64, lastErr error)

CloseRecordSet will finish the execution of current statement and do some record work

func (*ExecStmt) Exec 

func (a *ExecStmt) Exec(ctx context.Context) (_ sqlexec.RecordSet, err error)

Exec builds an Executor from a plan. If the Executor doesn't return result, like the INSERT, UPDATE statements, it executes in this function. If the Executor returns result, execution is done after this function returns, in the returned sqlexec.RecordSet Next method.

func (*ExecStmt) FinishExecuteStmt 

func (a *ExecStmt) FinishExecuteStmt(txnTS uint64, err error, hasMoreResults bool)

FinishExecuteStmt is used to record some information after `ExecStmt` execution finished: 1. record slow log if needed. 2. record summary statement. 3. record execute duration metric. 4. update the `PrevStmt` in session variable. 5. reset `DurationParse` in session variable.

func (*ExecStmt) GetStmtNode 

func (a *ExecStmt) GetStmtNode() ast.StmtNode

GetStmtNode returns the stmtNode inside Statement

func (*ExecStmt) GetTextToLog 

func (a *ExecStmt) GetTextToLog(keepHint bool) string

GetTextToLog return the query text to log.

func (*ExecStmt) IsPrepared 

func (a *ExecStmt) IsPrepared() bool

IsPrepared returns true if stmt is a prepare statement.

func (*ExecStmt) IsReadOnly 

func (a *ExecStmt) IsReadOnly(vars *variable.SessionVars) bool

IsReadOnly returns true if a statement is read only. If current StmtNode is an ExecuteStmt, we can get its prepared stmt, then using ast.IsReadOnly function to determine a statement is read only or not.

func (*ExecStmt) LogSlowQuery 

func (a *ExecStmt) LogSlowQuery(txnTS uint64, succ bool, hasMoreResults bool)

LogSlowQuery is used to print the slow query in the log files.

func (*ExecStmt) OriginText 

func (a *ExecStmt) OriginText() string

OriginText returns original statement as a string.

func (*ExecStmt) PointGet 

func (a *ExecStmt) PointGet(ctx context.Context) (*recordSet, error)

PointGet short path for point exec directly from plan, keep only necessary steps

func (*ExecStmt) RebuildPlan 

func (a *ExecStmt) RebuildPlan(ctx context.Context) (int64, error)

RebuildPlan rebuilds current execute statement plan. It returns the current information schema version that 'a' is using.

func (*ExecStmt) SummaryStmt 

func (a *ExecStmt) SummaryStmt(succ bool)

SummaryStmt collects statements for information_schema.statements_summary

func (*ExecStmt) Text 

func (a *ExecStmt) Text() string

Text returns utf8 encoded statement as a string.

func (*ExecStmt) UpdatePlanCacheRuntimeInfo 

func (a *ExecStmt) UpdatePlanCacheRuntimeInfo()

UpdatePlanCacheRuntimeInfo updates the runtime information of the plan in the plan cache.

type ExecuteExec 

type ExecuteExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

ExecuteExec represents an EXECUTE executor. It cannot be executed by itself, all it needs to do is to build another Executor from a prepared statement.

func (*ExecuteExec) Build 

func (e *ExecuteExec) Build(b *executorBuilder) error

Build builds a prepared statement into an executor. After Build, e.StmtExec will be used to do the real execution.

func (*ExecuteExec) Next 

func (*ExecuteExec) Next(context.Context, *chunk.Chunk) error

Next implements the Executor Next interface.

type ExpandExec 

type ExpandExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

ExpandExec is used to execute expand logical plan.

func (*ExpandExec) Close 

func (e *ExpandExec) Close() error

Close implements the Executor Close interface.

func (*ExpandExec) Next 

func (e *ExpandExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*ExpandExec) Open 

func (e *ExpandExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type ExplainExec 

type ExplainExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

ExplainExec represents an explain executor.

func (*ExplainExec) Close 

func (e *ExplainExec) Close() error

Close implements the Executor Close interface.

func (*ExplainExec) Next 

func (e *ExplainExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*ExplainExec) Open 

func (e *ExplainExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type FKCascadeExec 

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

FKCascadeExec uses to execute foreign key cascade behaviour.

type FKCascadeRuntimeStats 

type FKCascadeRuntimeStats struct {
	Total time.Duration
	Keys  int
}

FKCascadeRuntimeStats contains the FKCascadeExec runtime stats.

func (*FKCascadeRuntimeStats) Clone 

func (s *FKCascadeRuntimeStats) Clone() execdetails.RuntimeStats

Clone implements the RuntimeStats interface.

func (*FKCascadeRuntimeStats) Merge 

func (s *FKCascadeRuntimeStats) Merge(other execdetails.RuntimeStats)

Merge implements the RuntimeStats interface.

func (*FKCascadeRuntimeStats) String 

func (s *FKCascadeRuntimeStats) String() string

String implements the RuntimeStats interface.

func (*FKCascadeRuntimeStats) Tp 

func (*FKCascadeRuntimeStats) Tp() int

Tp implements the RuntimeStats interface.

type FKCheckExec 

type FKCheckExec struct {
	*plannercore.FKCheck
	// contains filtered or unexported fields
}

FKCheckExec uses to check foreign key constraint. When insert/update child table, need to check the row has related row exists in refer table. When insert/update parent table, need to check the row doesn't have related row exists in refer table.

type FKCheckRuntimeStats 

type FKCheckRuntimeStats struct {
	Total time.Duration
	Check time.Duration
	Lock  time.Duration
	Keys  int
}

FKCheckRuntimeStats contains the FKCheckExec runtime stats.

func (*FKCheckRuntimeStats) Clone 

func (s *FKCheckRuntimeStats) Clone() execdetails.RuntimeStats

Clone implements the RuntimeStats interface.

func (*FKCheckRuntimeStats) Merge 

func (s *FKCheckRuntimeStats) Merge(other execdetails.RuntimeStats)

Merge implements the RuntimeStats interface.

func (*FKCheckRuntimeStats) String 

func (s *FKCheckRuntimeStats) String() string

String implements the RuntimeStats interface.

func (*FKCheckRuntimeStats) Tp 

func (*FKCheckRuntimeStats) Tp() int

Tp implements the RuntimeStats interface.

type FastCheckTableExec 

type FastCheckTableExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

FastCheckTableExec represents a check table executor. It is built from the "admin check table" statement, and it checks if the index matches the records in the table. It uses a new algorithms to check table data, which is faster than the old one(CheckTableExec).

func (*FastCheckTableExec) Next 

func (e *FastCheckTableExec) Next(ctx context.Context, _ *chunk.Chunk) error

Next implements the Executor Next interface.

func (*FastCheckTableExec) Open 

func (e *FastCheckTableExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type GrantExec 

type GrantExec struct {
	exec.BaseExecutor

	Privs                 []*ast.PrivElem
	ObjectType            ast.ObjectTypeType
	Level                 *ast.GrantLevel
	Users                 []*ast.UserSpec
	AuthTokenOrTLSOptions []*ast.AuthTokenOrTLSOption

	WithGrant bool
	// contains filtered or unexported fields
}

GrantExec executes GrantStmt.

func (*GrantExec) Next 

func (e *GrantExec) Next(ctx context.Context, _ *chunk.Chunk) error

Next implements the Executor Next interface.

type HistoryHotRegion 

type HistoryHotRegion struct {
	UpdateTime    int64   `json:"update_time"`
	RegionID      uint64  `json:"region_id"`
	StoreID       uint64  `json:"store_id"`
	PeerID        uint64  `json:"peer_id"`
	IsLearner     bool    `json:"is_learner"`
	IsLeader      bool    `json:"is_leader"`
	HotRegionType string  `json:"hot_region_type"`
	HotDegree     int64   `json:"hot_degree"`
	FlowBytes     float64 `json:"flow_bytes"`
	KeyRate       float64 `json:"key_rate"`
	QueryRate     float64 `json:"query_rate"`
	StartKey      string  `json:"start_key"`
	EndKey        string  `json:"end_key"`
}

HistoryHotRegion records each hot region's statistics. it's the response of PD.

type HistoryHotRegions 

type HistoryHotRegions struct {
	HistoryHotRegion []*HistoryHotRegion `json:"history_hot_region"`
}

HistoryHotRegions records filtered hot regions stored in each PD. it's the response of PD.

type HistoryHotRegionsRequest 

type HistoryHotRegionsRequest struct {
	StartTime      int64    `json:"start_time,omitempty"`
	EndTime        int64    `json:"end_time,omitempty"`
	RegionIDs      []uint64 `json:"region_ids,omitempty"`
	StoreIDs       []uint64 `json:"store_ids,omitempty"`
	PeerIDs        []uint64 `json:"peer_ids,omitempty"`
	IsLearners     []bool   `json:"is_learners,omitempty"`
	IsLeaders      []bool   `json:"is_leaders,omitempty"`
	HotRegionTypes []string `json:"hot_region_type,omitempty"`
}

HistoryHotRegionsRequest wrap conditions push down to PD.

type ImportIntoActionExec 

type ImportIntoActionExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

ImportIntoActionExec represents a import into action executor.

func (*ImportIntoActionExec) Next 

func (e *ImportIntoActionExec) Next(ctx context.Context, _ *chunk.Chunk) (err error)

Next implements the Executor Next interface.

type ImportIntoExec 

type ImportIntoExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

ImportIntoExec represents a IMPORT INTO executor.

func (*ImportIntoExec) Next 

func (e *ImportIntoExec) Next(ctx context.Context, req *chunk.Chunk) (err error)

Next implements the Executor Next interface.

type IndexLookUpExecutor 

type IndexLookUpExecutor struct {
	exec.BaseExecutorV2

	// PushedLimit is used to skip the preceding and tailing handles when Limit is sunk into IndexLookUpReader.
	PushedLimit *plannercore.PushedDownLimit
	// contains filtered or unexported fields
}

IndexLookUpExecutor implements double read for index scan.

func (IndexLookUpExecutor) BuildExecutorForIndexJoin 

func (builder IndexLookUpExecutor) BuildExecutorForIndexJoin(ctx context.Context, lookUpContents []*join.IndexJoinLookUpContent,
	indexRanges []*ranger.Range, keyOff2IdxOff []int, cwc *plannercore.ColWithCmpFuncManager, canReorderHandles bool, memTracker *memory.Tracker, interruptSignal *atomic.Value) (exec.Executor, error)

func (*IndexLookUpExecutor) Close 

func (e *IndexLookUpExecutor) Close() error

Close implements Exec Close interface.

func (*IndexLookUpExecutor) Detach 

func (e *IndexLookUpExecutor) Detach() (exec.Executor, bool)

Detach detaches the current executor from the session context.

func (*IndexLookUpExecutor) Next 

func (e *IndexLookUpExecutor) Next(ctx context.Context, req *chunk.Chunk) error

Next implements Exec Next interface.

func (*IndexLookUpExecutor) Open 

func (e *IndexLookUpExecutor) Open(ctx context.Context) error

Open implements the Executor Open interface.

func (*IndexLookUpExecutor) Table 

func (e *IndexLookUpExecutor) Table() table.Table

Table implements the dataSourceExecutor interface.

type IndexLookUpRunTimeStats 

type IndexLookUpRunTimeStats struct {
	FetchHandleTotal int64
	FetchHandle      int64
	TaskWait         int64
	TableRowScan     int64
	TableTaskNum     int64
	Concurrency      int
	// Record the `Next` call affected wait duration details.
	NextWaitIndexScan        time.Duration
	NextWaitTableLookUpBuild time.Duration
	NextWaitTableLookUpResp  time.Duration
	// contains filtered or unexported fields
}

IndexLookUpRunTimeStats record the indexlookup runtime stat

func (*IndexLookUpRunTimeStats) Clone 

func (e *IndexLookUpRunTimeStats) Clone() execdetails.RuntimeStats

Clone implements the RuntimeStats interface.

func (*IndexLookUpRunTimeStats) Merge 

func (e *IndexLookUpRunTimeStats) Merge(other execdetails.RuntimeStats)

Merge implements the RuntimeStats interface.

func (*IndexLookUpRunTimeStats) String 

func (e *IndexLookUpRunTimeStats) String() string

func (*IndexLookUpRunTimeStats) Tp 

func (*IndexLookUpRunTimeStats) Tp() int

Tp implements the RuntimeStats interface.

type IndexMergeReaderExecutor 

type IndexMergeReaderExecutor struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

IndexMergeReaderExecutor accesses a table with multiple index/table scan. There are three types of workers: 1. partialTableWorker/partialIndexWorker, which are used to fetch the handles 2. indexMergeProcessWorker, which is used to do the `Union` operation. 3. indexMergeTableScanWorker, which is used to get the table tuples with the given handles.

The execution flow is really like IndexLookUpReader. However, it uses multiple index scans or table scans to get the handles:

  1. use the partialTableWorkers and partialIndexWorkers to fetch the handles (a batch per time) and send them to the indexMergeProcessWorker.
  2. indexMergeProcessWorker do the `Union` operation for a batch of handles it have got. For every handle in the batch:
  3. check whether it has been accessed.
  4. if not, record it and send it to the indexMergeTableScanWorker.
  5. if accessed, just ignore it.

func (IndexMergeReaderExecutor) BuildExecutorForIndexJoin 

func (builder IndexMergeReaderExecutor) BuildExecutorForIndexJoin(ctx context.Context, lookUpContents []*join.IndexJoinLookUpContent,
	indexRanges []*ranger.Range, keyOff2IdxOff []int, cwc *plannercore.ColWithCmpFuncManager, canReorderHandles bool, memTracker *memory.Tracker, interruptSignal *atomic.Value) (exec.Executor, error)

func (*IndexMergeReaderExecutor) Close 

func (e *IndexMergeReaderExecutor) Close() error

Close implements Exec Close interface.

func (*IndexMergeReaderExecutor) Next 

func (e *IndexMergeReaderExecutor) Next(ctx context.Context, req *chunk.Chunk) error

Next implements Executor Next interface.

func (*IndexMergeReaderExecutor) Open 

func (e *IndexMergeReaderExecutor) Open(_ context.Context) (err error)

Open implements the Executor Open interface

func (*IndexMergeReaderExecutor) Table 

func (e *IndexMergeReaderExecutor) Table() table.Table

Table implements the dataSourceExecutor interface.

type IndexMergeRuntimeStat 

type IndexMergeRuntimeStat struct {
	IndexMergeProcess time.Duration
	FetchIdxTime      int64
	WaitTime          int64
	FetchRow          int64
	TableTaskNum      int64
	Concurrency       int
}

IndexMergeRuntimeStat record the indexMerge runtime stat

func (*IndexMergeRuntimeStat) Clone 

func (e *IndexMergeRuntimeStat) Clone() execdetails.RuntimeStats

Clone implements the RuntimeStats interface.

func (*IndexMergeRuntimeStat) Merge 

func (e *IndexMergeRuntimeStat) Merge(other execdetails.RuntimeStats)

Merge implements the RuntimeStats interface.

func (*IndexMergeRuntimeStat) String 

func (e *IndexMergeRuntimeStat) String() string

func (*IndexMergeRuntimeStat) Tp 

func (*IndexMergeRuntimeStat) Tp() int

Tp implements the RuntimeStats interface.

type IndexReaderExecutor 

type IndexReaderExecutor struct {
	exec.BaseExecutorV2
	// contains filtered or unexported fields
}

IndexReaderExecutor sends dag request and reads index data from kv layer.

func (*IndexReaderExecutor) Close 

func (e *IndexReaderExecutor) Close() (err error)

Close clears all resources hold by current object.

func (*IndexReaderExecutor) Detach 

func (e *IndexReaderExecutor) Detach() (exec.Executor, bool)

Detach detaches the current executor from the session context.

func (*IndexReaderExecutor) Next 

func (e *IndexReaderExecutor) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*IndexReaderExecutor) Open 

func (e *IndexReaderExecutor) Open(ctx context.Context) error

Open implements the Executor Open interface.

func (IndexReaderExecutor) SelectResult 

func (sr IndexReaderExecutor) SelectResult(ctx context.Context, dctx *distsqlctx.DistSQLContext, kvReq *kv.Request,
	fieldTypes []*types.FieldType, copPlanIDs []int, rootPlanID int) (distsql.SelectResult, error)

func (*IndexReaderExecutor) Table 

func (e *IndexReaderExecutor) Table() table.Table

Table implements the dataSourceExecutor interface.

type InsertExec 

type InsertExec struct {
	*InsertValues
	OnDuplicate []*expression.Assignment

	Priority mysql.PriorityEnum
	// contains filtered or unexported fields
}

InsertExec represents an insert executor.

func (*InsertExec) Close 

func (e *InsertExec) Close() error

Close implements the Executor Close interface.

func (*InsertExec) GetFKCascades 

func (e *InsertExec) GetFKCascades() []*FKCascadeExec

GetFKCascades implements WithForeignKeyTrigger interface.

func (*InsertExec) GetFKChecks 

func (e *InsertExec) GetFKChecks() []*FKCheckExec

GetFKChecks implements WithForeignKeyTrigger interface.

func (*InsertExec) HasFKCascades 

func (e *InsertExec) HasFKCascades() bool

HasFKCascades implements WithForeignKeyTrigger interface.

func (*InsertExec) Next 

func (e *InsertExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*InsertExec) Open 

func (e *InsertExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type InsertRuntimeStat 

type InsertRuntimeStat struct {
	*execdetails.BasicRuntimeStats
	*txnsnapshot.SnapshotRuntimeStats
	*autoid.AllocatorRuntimeStats
	CheckInsertTime time.Duration
	Prefetch        time.Duration
	FKCheckTime     time.Duration
}

InsertRuntimeStat record the stat about insert and check

func (*InsertRuntimeStat) Clone 

func (e *InsertRuntimeStat) Clone() execdetails.RuntimeStats

Clone implements the RuntimeStats interface.

func (*InsertRuntimeStat) Merge 

func (e *InsertRuntimeStat) Merge(other execdetails.RuntimeStats)

Merge implements the RuntimeStats interface.

func (*InsertRuntimeStat) String 

func (e *InsertRuntimeStat) String() string

func (*InsertRuntimeStat) Tp 

func (*InsertRuntimeStat) Tp() int

Tp implements the RuntimeStats interface.

type InsertValues 

type InsertValues struct {
	exec.BaseExecutor

	SelectExec exec.Executor

	Table   table.Table
	Columns []*ast.ColumnName
	Lists   [][]expression.Expression

	GenExprs []expression.Expression
	// contains filtered or unexported fields
}

InsertValues is the data to insert. nolint:structcheck

type LimitExec 

type LimitExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

LimitExec represents limit executor It ignores 'Offset' rows from src, then returns 'Count' rows at maximum.

func (*LimitExec) Close 

func (e *LimitExec) Close() error

Close implements the Executor Close interface.

func (*LimitExec) Next 

func (e *LimitExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*LimitExec) Open 

func (e *LimitExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type LoadDataExec 

type LoadDataExec struct {
	exec.BaseExecutor

	FileLocRef ast.FileLocRefTp
	// contains filtered or unexported fields
}

LoadDataExec represents a load data executor.

func (*LoadDataExec) Close 

func (e *LoadDataExec) Close() error

Close implements the Executor interface.

func (*LoadDataExec) Next 

func (e *LoadDataExec) Next(ctx context.Context, _ *chunk.Chunk) (err error)

Next implements the Executor Next interface.

func (*LoadDataExec) Open 

func (e *LoadDataExec) Open(_ context.Context) error

Open implements the Executor interface.

type LoadDataReaderBuilder 

type LoadDataReaderBuilder func(filepath string) (
	r io.ReadCloser, err error,
)

LoadDataReaderBuilder is a function type that builds a reader from a file path.

type LoadDataWorker 

type LoadDataWorker struct {
	UserSctx sessionctx.Context
	// contains filtered or unexported fields
}

LoadDataWorker does a LOAD DATA job.

func NewLoadDataWorker 

func NewLoadDataWorker(
	userSctx sessionctx.Context,
	plan *plannercore.LoadData,
	tbl table.Table,
) (w *LoadDataWorker, err error)

NewLoadDataWorker creates a new LoadDataWorker that is ready to work.

func (*LoadDataWorker) GetController 

func (e *LoadDataWorker) GetController() *importer.LoadDataController

GetController get load data controller. used in unit test.

func (*LoadDataWorker) GetInfilePath 

func (e *LoadDataWorker) GetInfilePath() string

GetInfilePath get infile path.

func (*LoadDataWorker) LoadLocal 

func (e *LoadDataWorker) LoadLocal(ctx context.Context, r io.ReadCloser) error

LoadLocal reads from client connection and do load data job.

func (*LoadDataWorker) TestLoadLocal 

func (e *LoadDataWorker) TestLoadLocal(parser mydump.Parser) error

TestLoadLocal is a helper function for unit test.

type LoadStatsExec 

type LoadStatsExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

LoadStatsExec represents a load statistic executor.

func (*LoadStatsExec) Close 

func (*LoadStatsExec) Close() error

Close implements the Executor Close interface.

func (*LoadStatsExec) Next 

func (e *LoadStatsExec) Next(_ context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*LoadStatsExec) Open 

func (*LoadStatsExec) Open(context.Context) error

Open implements the Executor Open interface.

type LoadStatsInfo 

type LoadStatsInfo struct {
	Path string
	Ctx  sessionctx.Context
}

LoadStatsInfo saves the information of loading statistic operation.

func (*LoadStatsInfo) Update 

func (e *LoadStatsInfo) Update(data []byte) error

Update updates the stats of the corresponding table according to the data.

type MPPGather 

type MPPGather struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

MPPGather dispatch MPP tasks and read data from root tasks.

func (*MPPGather) Close 

func (e *MPPGather) Close() error

Close and release the used resources.

func (*MPPGather) Next 

func (e *MPPGather) Next(ctx context.Context, chk *chunk.Chunk) error

Next fills data into the chunk passed by its caller.

func (*MPPGather) Open 

func (e *MPPGather) Open(ctx context.Context) (err error)

Open implements the Executor Open interface.

func (*MPPGather) Table 

func (e *MPPGather) Table() table.Table

Table implements the dataSourceExecutor interface.

type MaxOneRowExec 

type MaxOneRowExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

MaxOneRowExec checks if the number of rows that a query returns is at maximum one. It's built from subquery expression.

func (*MaxOneRowExec) Next 

func (e *MaxOneRowExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*MaxOneRowExec) Open 

func (e *MaxOneRowExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type MemTableReaderExec 

type MemTableReaderExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

MemTableReaderExec executes memTable information retrieving from the MemTable components

func (*MemTableReaderExec) Close 

func (e *MemTableReaderExec) Close() error

Close implements the Executor Close interface.

func (*MemTableReaderExec) Next 

func (e *MemTableReaderExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

type MetricRetriever 

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

MetricRetriever uses to read metric data.

type MetricsSummaryByLabelRetriever 

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

MetricsSummaryByLabelRetriever uses to read metric detail data.

type MetricsSummaryRetriever 

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

MetricsSummaryRetriever uses to read metric data.

type MockExecutorBuilder 

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

MockExecutorBuilder is a wrapper for executorBuilder. ONLY used in test.

func NewMockExecutorBuilderForTest 

func NewMockExecutorBuilderForTest(ctx sessionctx.Context, is infoschema.InfoSchema) *MockExecutorBuilder

NewMockExecutorBuilderForTest is ONLY used in test.

func (*MockExecutorBuilder) Build 

func (b *MockExecutorBuilder) Build(p base.Plan) exec.Executor

Build builds an executor tree according to `p`.

type MockMetricsPromDataKey 

type MockMetricsPromDataKey struct{}

MockMetricsPromDataKey is for test

type ParallelNestedLoopApplyExec 

type ParallelNestedLoopApplyExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

ParallelNestedLoopApplyExec is the executor for apply.

func (*ParallelNestedLoopApplyExec) Close 

func (e *ParallelNestedLoopApplyExec) Close() error

Close implements the Executor interface.

func (*ParallelNestedLoopApplyExec) Next 

func (e *ParallelNestedLoopApplyExec) Next(ctx context.Context, req *chunk.Chunk) (err error)

Next implements the Executor interface.

func (*ParallelNestedLoopApplyExec) Open 

func (e *ParallelNestedLoopApplyExec) Open(ctx context.Context) error

Open implements the Executor interface.

type PauseDDLJobsExec 

type PauseDDLJobsExec struct {
	*CommandDDLJobsExec
}

PauseDDLJobsExec indicates an Executor for Pause a DDL Job.

type PessimisticLockCacheGetter 

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

PessimisticLockCacheGetter implements the kv.Getter interface. It is used as a middle cache to construct the BufferedBatchGetter.

func (*PessimisticLockCacheGetter) Get 

func (getter *PessimisticLockCacheGetter) Get(_ context.Context, key kv.Key) ([]byte, error)

Get implements the kv.Getter interface.

type PipelinedWindowExec 

type PipelinedWindowExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

PipelinedWindowExec is the executor for window functions.

func (*PipelinedWindowExec) Close 

func (e *PipelinedWindowExec) Close() error

Close implements the Executor Close interface.

func (*PipelinedWindowExec) Next 

func (e *PipelinedWindowExec) Next(ctx context.Context, chk *chunk.Chunk) (err error)

Next implements the Executor Next interface.

func (*PipelinedWindowExec) Open 

func (e *PipelinedWindowExec) Open(ctx context.Context) (err error)

Open implements the Executor Open interface

type PlanReplayerCaptureInfo 

type PlanReplayerCaptureInfo struct {
	SQLDigest  string
	PlanDigest string
	Remove     bool
}

PlanReplayerCaptureInfo indicates capture info

type PlanReplayerDumpInfo 

type PlanReplayerDumpInfo struct {
	ExecStmts         []ast.StmtNode
	Analyze           bool
	HistoricalStatsTS uint64
	StartTS           uint64
	Path              string
	File              *os.File
	FileName          string
	// contains filtered or unexported fields
}

PlanReplayerDumpInfo indicates dump info

func (*PlanReplayerDumpInfo) DumpSQLsFromFile 

func (e *PlanReplayerDumpInfo) DumpSQLsFromFile(ctx context.Context, b []byte) error

DumpSQLsFromFile dumps plan replayer results for sqls from file

type PlanReplayerExec 

type PlanReplayerExec struct {
	exec.BaseExecutor
	CaptureInfo *PlanReplayerCaptureInfo
	DumpInfo    *PlanReplayerDumpInfo
	// contains filtered or unexported fields
}

PlanReplayerExec represents a plan replayer executor.

func (*PlanReplayerExec) Next 

func (e *PlanReplayerExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

type PlanReplayerLoadExec 

type PlanReplayerLoadExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

PlanReplayerLoadExec represents a plan replayer load executor.

func (*PlanReplayerLoadExec) Next 

func (e *PlanReplayerLoadExec) Next(_ context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

type PlanReplayerLoadInfo 

type PlanReplayerLoadInfo struct {
	Path string
	Ctx  sessionctx.Context
}

PlanReplayerLoadInfo contains file path and session context.

func (*PlanReplayerLoadInfo) Update 

func (e *PlanReplayerLoadInfo) Update(data []byte) error

Update updates the data of the corresponding table.

type PointGetExecutor 

type PointGetExecutor struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

PointGetExecutor executes point select query.

func (*PointGetExecutor) Close 

func (e *PointGetExecutor) Close() error

Close implements the Executor interface.

func (*PointGetExecutor) Init 

func (e *PointGetExecutor) Init(p *plannercore.PointGetPlan)

Init set fields needed for PointGetExecutor reuse, this does NOT change baseExecutor field

func (*PointGetExecutor) Next 

func (e *PointGetExecutor) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor interface.

func (*PointGetExecutor) Open 

func (e *PointGetExecutor) Open(context.Context) error

Open implements the Executor interface.

func (*PointGetExecutor) Recreated 

func (e *PointGetExecutor) Recreated(p *plannercore.PointGetPlan)

Recreated based on Init, change baseExecutor fields also

type PrepareExec 

type PrepareExec struct {
	exec.BaseExecutor

	ID         uint32
	ParamCount int
	Fields     []*resolve.ResultField
	Stmt       any
	// contains filtered or unexported fields
}

PrepareExec represents a PREPARE executor.

func NewPrepareExec 

func NewPrepareExec(ctx sessionctx.Context, sqlTxt string) *PrepareExec

NewPrepareExec creates a new PrepareExec.

func (*PrepareExec) Next 

func (e *PrepareExec) Next(ctx context.Context, _ *chunk.Chunk) error

Next implements the Executor Next interface.

type ProjectionExec 

type ProjectionExec struct {
	exec.BaseExecutorV2
	// contains filtered or unexported fields
}

ProjectionExec implements the physical Projection Operator: https://en.wikipedia.org/wiki/Projection_(relational_algebra)

func (*ProjectionExec) Close 

func (e *ProjectionExec) Close() error

Close implements the Executor Close interface.

func (*ProjectionExec) Detach 

func (e *ProjectionExec) Detach() (exec.Executor, bool)

Detach detaches the current executor from the session context.

func (*ProjectionExec) Next 

func (e *ProjectionExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

Here we explain the execution flow of the parallel projection implementation. There are 3 main components:

  1. "projectionInputFetcher": Fetch input "Chunk" from child.
  2. "projectionWorker": Do the projection work.
  3. "ProjectionExec.Next": Return result to parent.

1. "projectionInputFetcher" gets its input and output resources from its "inputCh" and "outputCh" channel, once the input and output resources are obtained, it fetches child's result into "input.chk" and: 

a. Dispatches this input to the worker specified in "input.targetWorker"
b. Dispatches this output to the main thread: "ProjectionExec.Next"
c. Dispatches this output to the worker specified in "input.targetWorker"

It is finished and exited once: 

a. There is no more input from child.
b. "ProjectionExec" close the "globalFinishCh"

2. "projectionWorker" gets its input and output resources from its "inputCh" and "outputCh" channel, once the input and output resources are abtained, it calculates the projection result use "input.chk" as the input and "output.chk" as the output, once the calculation is done, it: 

a. Sends "nil" or error to "output.done" to mark this input is finished.
b. Returns the "input" resource to "projectionInputFetcher.inputCh"

They are finished and exited once: 

a. "ProjectionExec" closes the "globalFinishCh"

3. "ProjectionExec.Next" gets its output resources from its "outputCh" channel. After receiving an output from "outputCh", it should wait to receive a "nil" or error from "output.done" channel. Once a "nil" or error is received: 

a. Returns this output to its parent
b. Returns the "output" resource to "projectionInputFetcher.outputCh"

+-----------+----------------------+--------------------------+
|           |                      |                          |
|  +--------+---------+   +--------+---------+       +--------+---------+
|  | projectionWorker |   + projectionWorker |  ...  + projectionWorker |
|  +------------------+   +------------------+       +------------------+
|       ^       ^              ^       ^                  ^       ^
|       |       |              |       |                  |       |
|    inputCh outputCh       inputCh outputCh           inputCh outputCh
|       ^       ^              ^       ^                  ^       ^
|       |       |              |       |                  |       |
|                              |       |
|                              |       +----------------->outputCh
|                              |       |                      |
|                              |       |                      v
|                      +-------+-------+--------+   +---------------------+
|                      | projectionInputFetcher |   | ProjectionExec.Next |
|                      +------------------------+   +---------+-----------+
|                              ^       ^                      |
|                              |       |                      |
|                           inputCh outputCh                  |
|                              ^       ^                      |
|                              |       |                      |
+------------------------------+       +----------------------+

func (*ProjectionExec) Open 

func (e *ProjectionExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type RecommendIndexExec 

type RecommendIndexExec struct {
	exec.BaseExecutor

	Action   string
	SQL      string
	AdviseID int64
	Options  []ast.RecommendIndexOption
	// contains filtered or unexported fields
}

RecommendIndexExec represents a recommend index executor.

func (*RecommendIndexExec) Next 

func (e *RecommendIndexExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

type RecoverIndexExec 

type RecoverIndexExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

RecoverIndexExec represents a recover index executor. It is built from "admin recover index" statement, is used to backfill corrupted index.

func (*RecoverIndexExec) Next 

func (e *RecoverIndexExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*RecoverIndexExec) Open 

func (e *RecoverIndexExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type ReloadExprPushdownBlacklistExec 

type ReloadExprPushdownBlacklistExec struct {
	exec.BaseExecutor
}

ReloadExprPushdownBlacklistExec indicates ReloadExprPushdownBlacklist executor.

func (*ReloadExprPushdownBlacklistExec) Next 

func (e *ReloadExprPushdownBlacklistExec) Next(context.Context, *chunk.Chunk) error

Next implements the Executor Next interface.

type ReloadOptRuleBlacklistExec 

type ReloadOptRuleBlacklistExec struct {
	exec.BaseExecutor
}

ReloadOptRuleBlacklistExec indicates ReloadOptRuleBlacklist executor.

func (*ReloadOptRuleBlacklistExec) Next 

func (e *ReloadOptRuleBlacklistExec) Next(context.Context, *chunk.Chunk) error

Next implements the Executor Next interface.

type ReplaceExec 

type ReplaceExec struct {
	*InsertValues
	Priority int
}

ReplaceExec represents a replace executor.

func (*ReplaceExec) Close 

func (e *ReplaceExec) Close() error

Close implements the Executor Close interface.

func (*ReplaceExec) GetFKCascades 

func (e *ReplaceExec) GetFKCascades() []*FKCascadeExec

GetFKCascades implements WithForeignKeyTrigger interface.

func (*ReplaceExec) GetFKChecks 

func (e *ReplaceExec) GetFKChecks() []*FKCheckExec

GetFKChecks implements WithForeignKeyTrigger interface.

func (*ReplaceExec) HasFKCascades 

func (e *ReplaceExec) HasFKCascades() bool

HasFKCascades implements WithForeignKeyTrigger interface.

func (*ReplaceExec) Next 

func (e *ReplaceExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*ReplaceExec) Open 

func (e *ReplaceExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type ResumeDDLJobsExec 

type ResumeDDLJobsExec struct {
	*CommandDDLJobsExec
}

ResumeDDLJobsExec indicates an Executor for Resume a DDL Job.

type RevokeExec 

type RevokeExec struct {
	exec.BaseExecutor

	Privs      []*ast.PrivElem
	ObjectType ast.ObjectTypeType
	Level      *ast.GrantLevel
	Users      []*ast.UserSpec
	// contains filtered or unexported fields
}

RevokeExec executes RevokeStmt.

func (*RevokeExec) Next 

func (e *RevokeExec) Next(ctx context.Context, _ *chunk.Chunk) error

Next implements the Executor Next interface.

type SQLBindExec 

type SQLBindExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

SQLBindExec represents a bind executor.

func (*SQLBindExec) Next 

func (e *SQLBindExec) Next(_ context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

type SelectIntoExec 

type SelectIntoExec struct {
	exec.BaseExecutor

	core.LineFieldsInfo
	// contains filtered or unexported fields
}

SelectIntoExec represents a SelectInto executor.

func (*SelectIntoExec) Close 

func (s *SelectIntoExec) Close() error

Close implements the Executor Close interface.

func (*SelectIntoExec) Next 

func (s *SelectIntoExec) Next(ctx context.Context, _ *chunk.Chunk) error

Next implements the Executor Next interface.

func (*SelectIntoExec) Open 

func (s *SelectIntoExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type SelectLockExec 

type SelectLockExec struct {
	exec.BaseExecutor

	Lock *ast.SelectLockInfo
	// contains filtered or unexported fields
}

SelectLockExec represents a select lock executor. It is built from the "SELECT .. FOR UPDATE" or the "SELECT .. LOCK IN SHARE MODE" statement. For "SELECT .. FOR UPDATE" statement, it locks every row key from source Executor. After the execution, the keys are buffered in transaction, and will be sent to KV when doing commit. If there is any key already locked by another transaction, the transaction will rollback and retry.

func (*SelectLockExec) Next 

func (e *SelectLockExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*SelectLockExec) Open 

func (e *SelectLockExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type SelectionExec 

type SelectionExec struct {
	exec.BaseExecutorV2
	// contains filtered or unexported fields
}

SelectionExec represents a filter executor.

func (*SelectionExec) Close 

func (e *SelectionExec) Close() error

Close implements plannercore.Plan Close interface.

func (*SelectionExec) Detach 

func (e *SelectionExec) Detach() (exec.Executor, bool)

Detach detaches the current executor from the session context.

func (*SelectionExec) Next 

func (e *SelectionExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*SelectionExec) Open 

func (e *SelectionExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type SetConfigExec 

type SetConfigExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

SetConfigExec executes 'SET CONFIG' statement.

func (*SetConfigExec) Next 

func (s *SetConfigExec) Next(_ context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*SetConfigExec) Open 

func (s *SetConfigExec) Open(context.Context) error

Open implements the Executor Open interface.

type SetExecutor 

type SetExecutor struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

SetExecutor executes set statement.

func (*SetExecutor) Next 

func (e *SetExecutor) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

type ShowDDLExec 

type ShowDDLExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

ShowDDLExec represents a show DDL executor.

func (*ShowDDLExec) Next 

func (e *ShowDDLExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

type ShowDDLJobQueriesExec 

type ShowDDLJobQueriesExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

ShowDDLJobQueriesExec represents a show DDL job queries executor. The jobs id that is given by 'admin show ddl job queries' statement, only be searched in the latest 10 history jobs.

func (*ShowDDLJobQueriesExec) Next 

func (e *ShowDDLJobQueriesExec) Next(_ context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*ShowDDLJobQueriesExec) Open 

func (e *ShowDDLJobQueriesExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type ShowDDLJobQueriesWithRangeExec 

type ShowDDLJobQueriesWithRangeExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

ShowDDLJobQueriesWithRangeExec represents a show DDL job queries with range executor. The jobs id that is given by 'admin show ddl job queries' statement, can be searched within a specified range in history jobs using offset and limit.

func (*ShowDDLJobQueriesWithRangeExec) Next 

func (e *ShowDDLJobQueriesWithRangeExec) Next(_ context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*ShowDDLJobQueriesWithRangeExec) Open 

func (e *ShowDDLJobQueriesWithRangeExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type ShowDDLJobsExec 

type ShowDDLJobsExec struct {
	exec.BaseExecutor
	DDLJobRetriever
	// contains filtered or unexported fields
}

ShowDDLJobsExec represent a show DDL jobs executor.

func (*ShowDDLJobsExec) Close 

func (e *ShowDDLJobsExec) Close() error

Close implements the Executor Close interface.

func (*ShowDDLJobsExec) Next 

func (e *ShowDDLJobsExec) Next(_ context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*ShowDDLJobsExec) Open 

func (e *ShowDDLJobsExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type ShowExec 

type ShowExec struct {
	exec.BaseExecutor

	Tp                ast.ShowStmtType // Databases/Tables/Columns/....
	DBName            pmodel.CIStr
	Table             *resolve.TableNameW  // Used for showing columns.
	Partition         pmodel.CIStr         // Used for showing partition
	Column            *ast.ColumnName      // Used for `desc table column`.
	IndexName         pmodel.CIStr         // Used for show table regions.
	ResourceGroupName pmodel.CIStr         // Used for showing resource group
	Flag              int                  // Some flag parsed from sql, such as FULL.
	Roles             []*auth.RoleIdentity // Used for show grants.
	User              *auth.UserIdentity   // Used by show grants, show create user.
	Extractor         base.ShowPredicateExtractor

	CountWarningsOrErrors bool // Used for showing count(*) warnings | errors

	Full        bool
	IfNotExists bool // Used for `show create database if not exists`
	GlobalScope bool // GlobalScope is used by show variables
	Extended    bool // Used for `show extended columns from ...`

	ImportJobID *int64
	// contains filtered or unexported fields
}

ShowExec represents a show executor.

func (*ShowExec) Next 

func (e *ShowExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

type ShowNextRowIDExec 

type ShowNextRowIDExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

ShowNextRowIDExec represents a show the next row ID executor.

func (*ShowNextRowIDExec) Next 

func (e *ShowNextRowIDExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

type ShowSlowExec 

type ShowSlowExec struct {
	exec.BaseExecutor

	ShowSlow *ast.ShowSlow
	// contains filtered or unexported fields
}

ShowSlowExec represents the executor of showing the slow queries. It is build from the "admin show slow" statement: 

admin show slow top [internal | all] N
admin show slow recent N

func (*ShowSlowExec) Next 

func (e *ShowSlowExec) Next(_ context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*ShowSlowExec) Open 

func (e *ShowSlowExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type ShuffleExec 

type ShuffleExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

ShuffleExec is the executor to run other executors in a parallel manner.

  1. It fetches chunks from M `DataSources` (value of M depends on the actual executor, e.g. M = 1 for WindowExec, M = 2 for MergeJoinExec).

  2. It splits tuples from each `DataSource` into N partitions (Only "split by hash" is implemented so far).

  3. It invokes N workers in parallel, each one has M `receiver` to receive partitions from `DataSources`

  4. It assigns partitions received as input to each worker and executes child executors.

  5. It collects outputs from each worker, then sends outputs to its parent.

    +-------------+ +-------| Main Thread | | +------+------+ | ^ | | | + v +++ outputHolderCh | | outputCh (1 x Concurrency) v +++ | ^ | | | +-------+-------+ v | | +--------------+ +--------------+ +----- | worker | ....... | worker | worker (N Concurrency): child executor, eg. WindowExec (+SortExec) | +------------+-+ +-+------------+ | ^ ^ | | | | +-+ +-+ ...... +-+ | | | | | | | | ... ... ... inputCh (Concurrency x 1) v | | | | | | inputHolderCh +++ +++ +++ v ^ ^ ^ | | | | | +------o----+ | | | +-----------------+-----+ | | | | +---+------------+------------+----+-----------+ | | Partition Splitter | | +--------------+-+------------+-+--------------+ | ^ | | | +---------------v-----------------+ +----------> | fetch data from DataSource | +---------------------------------+

func (*ShuffleExec) Close 

func (e *ShuffleExec) Close() error

Close implements the Executor Close interface.

func (*ShuffleExec) Next 

func (e *ShuffleExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*ShuffleExec) Open 

func (e *ShuffleExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type SimpleExec 

type SimpleExec struct {
	exec.BaseExecutor

	Statement  ast.StmtNode
	ResolveCtx *resolve.Context
	// IsFromRemote indicates whether the statement IS FROM REMOTE TiDB instance in cluster,
	//   and executing in coprocessor.
	//   Used for `global kill`. See https://github.com/pingcap/tidb/blob/master/docs/design/2020-06-01-global-kill.md.
	IsFromRemote bool
	// contains filtered or unexported fields
}

SimpleExec represents simple statement executor. For statements do simple execution. includes `UseStmt`, 'SetStmt`, `DoStmt`, `BeginStmt`, `CommitStmt`, `RollbackStmt`. TODO: list all simple statements.

func (*SimpleExec) Next 

func (e *SimpleExec) Next(ctx context.Context, _ *chunk.Chunk) (err error)

Next implements the Executor Next interface.

type SimpleSeekerOnReadCloser 

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

SimpleSeekerOnReadCloser provides Seek(0, SeekCurrent) on ReadCloser.

func NewSimpleSeekerOnReadCloser 

func NewSimpleSeekerOnReadCloser(r io.ReadCloser) *SimpleSeekerOnReadCloser

NewSimpleSeekerOnReadCloser creates a SimpleSeekerOnReadCloser.

func (*SimpleSeekerOnReadCloser) Close 

func (s *SimpleSeekerOnReadCloser) Close() error

Close implements io.Closer.

func (*SimpleSeekerOnReadCloser) GetFileSize 

func (*SimpleSeekerOnReadCloser) GetFileSize() (int64, error)

GetFileSize implements storage.ExternalFileReader.

func (*SimpleSeekerOnReadCloser) Read 

func (s *SimpleSeekerOnReadCloser) Read(p []byte) (n int, err error)

Read implements io.Reader.

func (*SimpleSeekerOnReadCloser) Seek 

func (s *SimpleSeekerOnReadCloser) Seek(offset int64, whence int) (int64, error)

Seek implements io.Seeker.

type SplitIndexRegionExec 

type SplitIndexRegionExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

SplitIndexRegionExec represents a split index regions executor.

func (*SplitIndexRegionExec) Next 

func (e *SplitIndexRegionExec) Next(ctx context.Context, chk *chunk.Chunk) error

Next implements the Executor Next interface.

func (*SplitIndexRegionExec) Open 

func (e *SplitIndexRegionExec) Open(context.Context) (err error)

Open implements the Executor Open interface.

type SplitTableRegionExec 

type SplitTableRegionExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

SplitTableRegionExec represents a split table regions executor.

func (*SplitTableRegionExec) Next 

func (e *SplitTableRegionExec) Next(ctx context.Context, chk *chunk.Chunk) error

Next implements the Executor Next interface.

func (*SplitTableRegionExec) Open 

func (e *SplitTableRegionExec) Open(context.Context) (err error)

Open implements the Executor Open interface.

type TableDualExec 

type TableDualExec struct {
	exec.BaseExecutorV2
	// contains filtered or unexported fields
}

TableDualExec represents a dual table executor.

func (*TableDualExec) Next 

func (e *TableDualExec) Next(_ context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*TableDualExec) Open 

func (e *TableDualExec) Open(context.Context) error

Open implements the Executor Open interface.

type TableReaderExecutor 

type TableReaderExecutor struct {
	exec.BaseExecutorV2
	// contains filtered or unexported fields
}

TableReaderExecutor sends DAG request and reads table data from kv layer.

func (*TableReaderExecutor) Close 

func (e *TableReaderExecutor) Close() error

Close implements the Executor Close interface.

func (*TableReaderExecutor) Detach 

func (e *TableReaderExecutor) Detach() (exec.Executor, bool)

Detach detaches the current executor from the session context.

func (*TableReaderExecutor) GetDDLOwner 

func (treCtx *TableReaderExecutor) GetDDLOwner(ctx context.Context) (*infosync.ServerInfo, error)

func (*TableReaderExecutor) GetInfoSchema 

func (treCtx *TableReaderExecutor) GetInfoSchema() isctx.MetaOnlyInfoSchema

func (*TableReaderExecutor) Next 

func (e *TableReaderExecutor) Next(ctx context.Context, req *chunk.Chunk) error

Next fills data into the chunk passed by its caller. The task was actually done by tableReaderHandler.

func (*TableReaderExecutor) Open 

func (e *TableReaderExecutor) Open(ctx context.Context) error

Open initializes necessary variables for using this executor.

func (TableReaderExecutor) SelectResult 

func (sr TableReaderExecutor) SelectResult(ctx context.Context, dctx *distsqlctx.DistSQLContext, kvReq *kv.Request,
	fieldTypes []*types.FieldType, copPlanIDs []int, rootPlanID int) (distsql.SelectResult, error)

func (*TableReaderExecutor) Table 

func (e *TableReaderExecutor) Table() table.Table

Table implements the dataSourceExecutor interface.

type TableSampleExecutor 

type TableSampleExecutor struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

TableSampleExecutor fetches a few rows through kv.Scan according to the specific sample method.

func (*TableSampleExecutor) Close 

func (*TableSampleExecutor) Close() error

Close implements the Executor Close interface.

func (*TableSampleExecutor) Next 

func (e *TableSampleExecutor) Next(_ context.Context, req *chunk.Chunk) error

Next fills data into the chunk passed by its caller. The task was actually done by sampler.

func (*TableSampleExecutor) Open 

func (*TableSampleExecutor) Open(ctx context.Context) error

Open initializes necessary variables for using this executor.

type TableScanExec 

type TableScanExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

TableScanExec is a table scan executor without result fields.

func (*TableScanExec) Next 

func (e *TableScanExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*TableScanExec) Open 

func (e *TableScanExec) Open(context.Context) error

Open implements the Executor Open interface.

type TestShowClusterConfigFunc 

type TestShowClusterConfigFunc func() ([][]types.Datum, error)

TestShowClusterConfigFunc is used to test 'show config ...'.

type TiFlashSystemTableRetriever 

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

TiFlashSystemTableRetriever is used to read system table from tiflash.

type TraceExec 

type TraceExec struct {
	exec.BaseExecutor
	// CollectedSpans collects all span during execution. Span is appended via
	// callback method which passes into tracer implementation.
	CollectedSpans []basictracer.RawSpan
	// contains filtered or unexported fields
}

TraceExec represents a root executor of trace query.

func (*TraceExec) Next 

func (e *TraceExec) Next(ctx context.Context, req *chunk.Chunk) error

Next executes real query and collects span later.

type UnionScanExec 

type UnionScanExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

UnionScanExec merges the rows from dirty table and the rows from distsql request.

func (*UnionScanExec) Close 

func (us *UnionScanExec) Close() error

Close implements the Executor Close interface.

func (*UnionScanExec) Next 

func (us *UnionScanExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*UnionScanExec) Open 

func (us *UnionScanExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type UpdateExec 

type UpdateExec struct {
	exec.BaseExecutor

	OrderedList []*expression.Assignment

	IgnoreError bool
	// contains filtered or unexported fields
}

UpdateExec represents a new update executor.

func (*UpdateExec) Close 

func (e *UpdateExec) Close() error

Close implements the Executor Close interface.

func (*UpdateExec) GetFKCascades 

func (e *UpdateExec) GetFKCascades() []*FKCascadeExec

GetFKCascades implements WithForeignKeyTrigger interface.

func (*UpdateExec) GetFKChecks 

func (e *UpdateExec) GetFKChecks() []*FKCheckExec

GetFKChecks implements WithForeignKeyTrigger interface.

func (*UpdateExec) HasFKCascades 

func (e *UpdateExec) HasFKCascades() bool

HasFKCascades implements WithForeignKeyTrigger interface.

func (*UpdateExec) Next 

func (e *UpdateExec) Next(ctx context.Context, req *chunk.Chunk) error

Next implements the Executor Next interface.

func (*UpdateExec) Open 

func (e *UpdateExec) Open(ctx context.Context) error

Open implements the Executor Open interface.

type UpdatedValuesCouple 

type UpdatedValuesCouple struct {
	NewValues     []types.Datum
	OldValuesList [][]types.Datum
}

UpdatedValuesCouple contains the updated new row the old rows, exporting for test.

type WindowExec 

type WindowExec struct {
	exec.BaseExecutor
	// contains filtered or unexported fields
}

WindowExec is the executor for window functions.

func (*WindowExec) Close 

func (e *WindowExec) Close() error

Close implements the Executor Close interface.

func (*WindowExec) Next 

func (e *WindowExec) Next(ctx context.Context, chk *chunk.Chunk) error

Next implements the Executor Next interface.

type WithForeignKeyTrigger 

type WithForeignKeyTrigger interface {
	GetFKChecks() []*FKCheckExec
	GetFKCascades() []*FKCascadeExec
	HasFKCascades() bool
}

WithForeignKeyTrigger indicates the executor has foreign key check or cascade.

Source Files

View all Source files

Directories

Path Synopsis
internal
applycache
builder
calibrateresource
exec
mpp
pdhelper
querywatch
testutil
util
vecgroupchecker
joinversion

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.