tables

package
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 Go to latest Published: Dec 16, 2024 License: Apache-2.0 Imports: 56 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	// ErrInconsistentRowValue is the error when values in a row insertion does not match the expected ones.
	ErrInconsistentRowValue = dbterror.ClassTable.NewStd(errno.ErrInconsistentRowValue)
	// ErrInconsistentHandle is the error when the handle in the row/index insertions does not match.
	ErrInconsistentHandle = dbterror.ClassTable.NewStd(errno.ErrInconsistentHandle)
	// ErrInconsistentIndexedValue is the error when decoded values from the index mutation cannot match row value
	ErrInconsistentIndexedValue = dbterror.ClassTable.NewStd(errno.ErrInconsistentIndexedValue)
)
View Source 
var TestMockRenewLeaseABA2 chan struct{}

TestMockRenewLeaseABA2 is used by test function TestRenewLeaseABAFailPoint.

Functions

func AllocHandle 

func AllocHandle(ctx context.Context, mctx table.MutateContext, t table.Table) (kv.IntHandle,
	error)

AllocHandle allocate a new handle. A statement could reserve some ID in the statement context, try those ones first.

func AllocHandleIDs 

func AllocHandleIDs(ctx context.Context, mctx table.MutateContext, t table.Table, n uint64) (int64, int64, error)

AllocHandleIDs allocates n handle ids (_tidb_rowid), and caches the range in the table.MutateContext.

func BuildFieldTypesForIndexColumns 

func BuildFieldTypesForIndexColumns(idxInfo *model.IndexInfo, tblInfo *model.TableInfo) []*types.FieldType

BuildFieldTypesForIndexColumns builds the index columns field types.

func BuildPartitionTableScanFromInfos 

func BuildPartitionTableScanFromInfos(tableInfo *model.TableInfo, columnInfos []*model.ColumnInfo, fastScan bool) *tipb.PartitionTableScan

BuildPartitionTableScanFromInfos build tipb.PartitonTableScan with *model.TableInfo and *model.ColumnInfo.

func BuildRowcodecColInfoForIndexColumns 

func BuildRowcodecColInfoForIndexColumns(idxInfo *model.IndexInfo, tblInfo *model.TableInfo) []rowcodec.ColInfo

BuildRowcodecColInfoForIndexColumns builds []rowcodec.ColInfo for the given index. The result can be used for decoding index key-values.

func BuildTableScanFromInfos 

func BuildTableScanFromInfos(tableInfo *model.TableInfo, columnInfos []*model.ColumnInfo, isTiFlashStore bool) *tipb.TableScan

BuildTableScanFromInfos build tipb.TableScan with *model.TableInfo and *model.ColumnInfo.

func CanSkip 

func CanSkip(info *model.TableInfo, col *table.Column, value *types.Datum) bool

CanSkip is for these cases, we can skip the columns in encoded row: 1. the column is included in primary key; 2. the column's default value is null, and the value equals to that but has no origin default; 3. the column is virtual generated.

func CheckDataConsistency 

func CheckDataConsistency(
	txn kv.Transaction, tc types.Context, t *TableCommon,
	rowToInsert, rowToRemove []types.Datum, memBuffer kv.MemBuffer, sh kv.StagingHandle,
) error

CheckDataConsistency checks whether the given set of mutations corresponding to a single row is consistent. Namely, assume the database is consistent before, applying the mutations shouldn't break the consistency. It aims at reducing bugs that will corrupt data, and preventing mistakes from spreading if possible.

3 conditions are checked: (1) row.value is consistent with input data (2) the handle is consistent in row and index insertions (3) the keys of the indices are consistent with the values of rows

The check doesn't work and just returns nil when: (1) the table is partitioned (2) new collation is enabled and restored data is needed

The check is performed on almost every write. Its performance matters. Let M = the number of mutations, C = the number of columns in the table, I = the sum of the number of columns in all indices, The time complexity is O(M * C + I) The space complexity is O(M + C + I)

func CompareIndexAndVal 

func CompareIndexAndVal(tc types.Context, rowVal types.Datum, idxVal types.Datum, collator collate.Collator, cmpMVIndex bool) (int, error)

CompareIndexAndVal compare index valued and row value.

func ConvertDatumToTailSpaceCount 

func ConvertDatumToTailSpaceCount(datum *types.Datum, col *model.ColumnInfo)

ConvertDatumToTailSpaceCount converts a string datum to an int datum that represents the tail space count.

func DecodeRawRowData 

func DecodeRawRowData(ctx expression.BuildContext, meta *model.TableInfo, h kv.Handle, cols []*table.Column,
	value []byte) ([]types.Datum, map[int64]types.Datum, error)

DecodeRawRowData decodes raw row data into a datum slice and a (columnID:columnValue) map.

func FetchDuplicatedHandle 

func FetchDuplicatedHandle(ctx context.Context, key kv.Key, distinct bool,
	txn kv.Transaction, tableID int64) (foundKey bool, dupHandle kv.Handle, err error)

FetchDuplicatedHandle is used to find the duplicated row's handle for a given unique index key.

func FindChangingCol 

func FindChangingCol(cols []*table.Column, idxInfo *model.IndexInfo) *table.Column

FindChangingCol finds the changing column in idxInfo.

func FindIndexByColName 

func FindIndexByColName(t table.Table, name string) table.Index

FindIndexByColName returns a public table index containing only one column named `name`.

func FindPartitionByName 

func FindPartitionByName(meta *model.TableInfo, parName string) (int64, error)

FindPartitionByName finds partition in table meta by name.

func FindPrimaryIndex 

func FindPrimaryIndex(tblInfo *model.TableInfo) *model.IndexInfo

FindPrimaryIndex uses to find primary index in tableInfo.

func GenIndexValueFromIndex 

func GenIndexValueFromIndex(key []byte, value []byte, tblInfo *model.TableInfo, idxInfo *model.IndexInfo) ([]string, error)

GenIndexValueFromIndex generate index value from index.

func GenTempIdxKeyByState 

func GenTempIdxKeyByState(indexInfo *model.IndexInfo, indexKey kv.Key) (key, tempKey kv.Key, tempKeyVer byte)

GenTempIdxKeyByState is used to get the key version and the temporary key. The tempKeyVer means the temp index key/value version.

func GetChangingColVal 

func GetChangingColVal(ctx exprctx.BuildContext, cols []*table.Column, col *table.Column, rowMap map[int64]types.Datum, defaultVals []types.Datum) (_ types.Datum, isDefaultVal bool, err error)

GetChangingColVal gets the changing column value when executing "modify/change column" statement. For statement like update-where, it will fetch the old row out and insert it into kv again. Since update statement can see the writable columns, it is responsible for the casting relative column / get the fault value here. old row : a-b-[nil] new row : a-b-[a'/default] Thus the writable new row is corresponding to Write-Only constraints.

func GetColDefaultValue 

func GetColDefaultValue(ctx exprctx.BuildContext, col *table.Column, defaultVals []types.Datum) (
	colVal types.Datum, err error)

GetColDefaultValue gets a column default value. The defaultVals is used to avoid calculating the default value multiple times.

func GetReorganizedPartitionedTable 

func GetReorganizedPartitionedTable(t table.Table) (table.PartitionedTable, error)

GetReorganizedPartitionedTable returns the same table but only with the AddingDefinitions used.

func GetWritableIndexByName 

func GetWritableIndexByName(idxName string, t table.Table) table.Index

GetWritableIndexByName gets the index meta from the table by the index name.

func IsIndexWritable 

func IsIndexWritable(idx table.Index) bool

IsIndexWritable check whether the index is writable.

func IterRecords 

func IterRecords(t table.Table, ctx sessionctx.Context, cols []*table.Column,
	fn table.RecordIterFunc) error

IterRecords iterates records in the table and calls fn.

func MockTableFromMeta 

func MockTableFromMeta(tblInfo *model.TableInfo) table.Table

MockTableFromMeta only serves for test.

func NeedRestoredData 

func NeedRestoredData(idxCols []*model.IndexColumn, colInfos []*model.ColumnInfo) bool

NeedRestoredData checks whether the index columns needs restored data.

func NewIndex 

func NewIndex(physicalID int64, tblInfo *model.TableInfo, indexInfo *model.IndexInfo) table.Index

NewIndex builds a new Index object.

func NewListPartitionLocationHelper 

func NewListPartitionLocationHelper() *listPartitionLocationHelper

NewListPartitionLocationHelper returns a new listPartitionLocationHelper.

func NewPartitionExprBuildCtx 

func NewPartitionExprBuildCtx() expression.BuildContext

NewPartitionExprBuildCtx returns a context to build partition expression.

func NewPartitionTableWithGivenSets 

func NewPartitionTableWithGivenSets(tbl table.PartitionedTable, partitions map[int64]struct{}) table.PartitionedTable

NewPartitionTableWithGivenSets creates a new partition table from a partition table.

func NewStateRemote 

func NewStateRemote(exec sqlExec) *stateRemoteHandle

NewStateRemote creates a StateRemote object.

func OverflowShardBits 

func OverflowShardBits(recordID int64, shardRowIDBits uint64, typeBitsLength uint64, reservedSignBit bool) bool

OverflowShardBits checks whether the recordID overflow `1<<(typeBitsLength-shardRowIDBits-1) -1`.

func PartitionRecordKey 

func PartitionRecordKey(pid int64, handle int64) kv.Key

PartitionRecordKey is exported for test.

func PrimaryPrefixColumnIDs 

func PrimaryPrefixColumnIDs(tbl *model.TableInfo) (prefixCols []int64)

PrimaryPrefixColumnIDs get prefix column ids in primary key.

func RowWithCols 

func RowWithCols(t table.Table, ctx sessionctx.Context, h kv.Handle, cols []*table.Column) ([]types.Datum, error)

RowWithCols is used to get the corresponding column datum values with the given handle.

func SetPBColumnsDefaultValue 

func SetPBColumnsDefaultValue(ctx expression.BuildContext, pbColumns []*tipb.ColumnInfo, columns []*model.ColumnInfo) error

SetPBColumnsDefaultValue sets the default values of tipb.ColumnInfo.

func SwapReorgPartFields 

func SwapReorgPartFields(src, dst table.Table) bool

SwapReorgPartFields swaps the reorganizePartitions field of two partitioned tables. used in tests.

func TableFromMeta 

func TableFromMeta(allocs autoid.Allocators, tblInfo *model.TableInfo) (table.Table, error)

TableFromMeta creates a Table instance from model.TableInfo.

func TempTableFromMeta 

func TempTableFromMeta(tblInfo *model.TableInfo) tableutil.TempTable

TempTableFromMeta builds a TempTable from model.TableInfo.

func TryAppendCommonHandleRowcodecColInfos 

func TryAppendCommonHandleRowcodecColInfos(colInfo []rowcodec.ColInfo, tblInfo *model.TableInfo) []rowcodec.ColInfo

TryAppendCommonHandleRowcodecColInfos tries to append common handle columns to `colInfo`.

func TryGetCommonPkColumnIds 

func TryGetCommonPkColumnIds(tbl *model.TableInfo) []int64

TryGetCommonPkColumnIds get the IDs of primary key column if the table has common handle.

func TryGetCommonPkColumns 

func TryGetCommonPkColumns(tbl table.Table) []*table.Column

TryGetCommonPkColumns get the primary key columns if the table has common handle.

func TryGetHandleRestoredDataWrapper 

func TryGetHandleRestoredDataWrapper(tblInfo *model.TableInfo, row []types.Datum, rowMap map[int64]types.Datum, idx *model.IndexInfo) []types.Datum

TryGetHandleRestoredDataWrapper tries to get the restored data for handle if needed. The argument can be a slice or a map.

func TryTruncateRestoredData 

func TryTruncateRestoredData(datum *types.Datum, pkCol *model.ColumnInfo,
	pkIdxCol *model.IndexColumn, idx *model.IndexInfo)

TryTruncateRestoredData tries to truncate index values. Says that primary key(a (8)), For index t(a), don't truncate the value. For index t(a(9)), truncate to a(9). For index t(a(7)), truncate to a(8).

Types

type CachedTableLockType 

type CachedTableLockType int

CachedTableLockType define the lock type for cached table 

const (
	// CachedTableLockNone means there is no lock.
	CachedTableLockNone CachedTableLockType = iota
	// CachedTableLockRead is the READ lock type.
	CachedTableLockRead
	// CachedTableLockIntend is the write INTEND, it exists when the changing READ to WRITE, and the READ lock lease is not expired..
	CachedTableLockIntend
	// CachedTableLockWrite is the WRITE lock type.
	CachedTableLockWrite
)

func (CachedTableLockType) String 

func (l CachedTableLockType) String() string

type ForKeyPruning 

type ForKeyPruning struct {
	KeyPartCols []*expression.Column
}

ForKeyPruning is used for key partition pruning.

func (*ForKeyPruning) LocateKeyPartition 

func (kp *ForKeyPruning) LocateKeyPartition(numParts uint64, r []types.Datum) (int, error)

LocateKeyPartition is the common interface used to locate the destination partition

type ForListColumnPruning 

type ForListColumnPruning struct {
	ExprCol *expression.Column
	// contains filtered or unexported fields
}

ForListColumnPruning is used for list columns partition pruning.

func (*ForListColumnPruning) HasDefault 

func (lp *ForListColumnPruning) HasDefault() bool

HasDefault return true if the partition has the DEFAULT value

func (*ForListColumnPruning) LocatePartition 

func (lp *ForListColumnPruning) LocatePartition(tc types.Context, ec errctx.Context, v types.Datum) (ListPartitionLocation, error)

LocatePartition locates partition by the column value

func (*ForListColumnPruning) LocateRanges 

func (lp *ForListColumnPruning) LocateRanges(tc types.Context, ec errctx.Context, r *ranger.Range, defaultPartIdx int) ([]ListPartitionLocation, error)

LocateRanges locates partition ranges by the column range

func (*ForListColumnPruning) RebuildPartitionValueMapAndSorted 

func (lp *ForListColumnPruning) RebuildPartitionValueMapAndSorted(p *parser.Parser,
	defs []model.PartitionDefinition) error

RebuildPartitionValueMapAndSorted rebuilds list columns partition value map for the specified column.

type ForListPruning 

type ForListPruning struct {
	// LocateExpr uses to locate list partition by row.
	LocateExpr expression.Expression
	// PruneExpr uses to prune list partition in partition pruner.
	PruneExpr expression.Expression
	// PruneExprCols is the columns of PruneExpr, it has removed the duplicate columns.
	PruneExprCols []*expression.Column

	// For list columns partition pruning
	ColPrunes []*ForListColumnPruning
	// contains filtered or unexported fields
}

ForListPruning is used for list partition pruning.

func (*ForListPruning) Clone 

func (lp *ForListPruning) Clone() *ForListPruning

Clone a copy of ForListPruning

func (*ForListPruning) GetDefaultIdx 

func (lp *ForListPruning) GetDefaultIdx() int

GetDefaultIdx return the Default partitions index.

func (*ForListPruning) LocatePartition 

func (lp *ForListPruning) LocatePartition(ctx exprctx.EvalContext, value int64, isNull bool) int

LocatePartition locates partition by the column value

func (*ForListPruning) LocatePartitionByRange 

func (lp *ForListPruning) LocatePartitionByRange(ctx exprctx.EvalContext, r *ranger.Range) (idxs map[int]struct{}, err error)

LocatePartitionByRange locates partition by the range Only could process `column op value` right now.

type ForRangeColumnsPruning 

type ForRangeColumnsPruning struct {
	// LessThan contains expressions for [Partition][column].
	// If Maxvalue, then nil
	LessThan [][]*expression.Expression
}

ForRangeColumnsPruning is used for range partition pruning.

type ForRangePruning 

type ForRangePruning struct {
	LessThan []int64
	MaxValue bool
	Unsigned bool
}

ForRangePruning is used for range partition pruning.

func (*ForRangePruning) Compare 

func (lt *ForRangePruning) Compare(ith int, v int64, unsigned bool) int

Compare is to be used in the binary search to locate partition

type ListPartitionGroup 

type ListPartitionGroup struct {
	// Such as: list columns (a,b) (partition p0 values in ((1,5),(1,6)));
	// For the column a which value is 1, the ListPartitionGroup is:
	// ListPartitionGroup {
	//     PartIdx: 0,            // 0 is the partition p0 index in all partitions.
	//     GroupIdxs: []int{0,1}, // p0 has 2 value group: (1,5) and (1,6), and they both contain the column a where value is 1;
	// }                          // the value of GroupIdxs `0,1` is the index of the value group that contain the column a which value is 1.
	PartIdx   int
	GroupIdxs []int
}

ListPartitionGroup indicate the group index of the column value in a partition.

type ListPartitionLocation 

type ListPartitionLocation []ListPartitionGroup

ListPartitionLocation indicate the partition location for the column value in list columns partition. Here is an example: Suppose the list columns partition is: list columns (a,b) (partition p0 values in ((1,5),(1,6)), partition p1 values in ((1,7),(9,9))); How to express the location of the column a which value is 1? For the column a which value is 1, both partition p0 and p1 contain the column a which value is 1. In partition p0, both value group0 (1,5) and group1 (1,6) are contain the column a which value is 1. In partition p1, value group0 (1,7) contains the column a which value is 1. So, the ListPartitionLocation of column a which value is 1 is: 

[]ListPartitionGroup{
	{
		PartIdx: 0,               // `0` is the partition p0 index in all partitions.
		GroupIdxs: []int{0, 1}    // `0,1` is the index of the value group0, group1.
	},
	{
		PartIdx: 1,               // `1` is the partition p1 index in all partitions.
		GroupIdxs: []int{0}       // `0` is the index of the value group0.
	},
}

func (ListPartitionLocation) IsEmpty 

func (ps ListPartitionLocation) IsEmpty() bool

IsEmpty returns true if the ListPartitionLocation is empty.

type PartitionExpr 

type PartitionExpr struct {
	// UpperBounds: (x < y1); (x < y2); (x < y3), used by locatePartition.
	UpperBounds []expression.Expression
	// OrigExpr is the partition expression ast used in point get.
	OrigExpr ast.ExprNode
	// Expr is the hash partition expression.
	Expr expression.Expression
	// Used in the key partition
	*ForKeyPruning
	// Used in the range pruning process.
	*ForRangePruning
	// Used in the range column pruning process.
	*ForRangeColumnsPruning
	// ColOffset is the offsets of partition columns.
	ColumnOffset []int
	*ForListPruning
}

PartitionExpr is the partition definition expressions.

func (*PartitionExpr) GetPartColumnsForKeyPartition 

func (pe *PartitionExpr) GetPartColumnsForKeyPartition(columns []*expression.Column) ([]*expression.Column, []int)

GetPartColumnsForKeyPartition is used to get partition columns for key partition table

type StateRemote 

type StateRemote interface {
	// Load obtain the corresponding lock type and lease value according to the tableID
	Load(ctx context.Context, tid int64) (CachedTableLockType, uint64, error)

	// LockForRead try to add a read lock to the table with the specified tableID.
	// If this operation succeed, according to the protocol, the TiKV data will not be
	// modified until the lease expire. It's safe for the caller to load the table data,
	// cache and use the data.
	LockForRead(ctx context.Context, tid int64, lease uint64) (bool, error)

	// LockForWrite try to add a write lock to the table with the specified tableID
	LockForWrite(ctx context.Context, tid int64, leaseDuration time.Duration) (uint64, error)

	// RenewReadLease attempt to renew the read lock lease on the table with the specified tableID
	RenewReadLease(ctx context.Context, tid int64, oldLocalLease, newValue uint64) (uint64, error)

	// RenewWriteLease attempt to renew the write lock lease on the table with the specified tableID
	RenewWriteLease(ctx context.Context, tid int64, newTs uint64) (bool, error)
}

StateRemote is the interface to control the remote state of the cached table's lock meta information. IMPORTANT: It's not thread-safe, the caller should be aware of that!

type TableCommon 

type TableCommon struct {
	Columns []*table.Column

	Constraints []*table.Constraint
	// contains filtered or unexported fields
}

TableCommon is shared by both Table and partition. NOTE: when copying this struct, use Copy() to clear its columns cache.

func (*TableCommon) AddRecord 

func (t *TableCommon) AddRecord(sctx table.MutateContext, txn kv.Transaction, r []types.Datum, opts ...table.AddRecordOption) (recordID kv.Handle, err error)

AddRecord implements table.Table AddRecord interface.

func (*TableCommon) Allocators 

func (t *TableCommon) Allocators(ctx table.AllocatorContext) autoid.Allocators

Allocators implements table.Table Allocators interface.

func (*TableCommon) Cols 

func (t *TableCommon) Cols() []*table.Column

Cols implements table.Table Cols interface.

func (*TableCommon) Copy 

func (t *TableCommon) Copy() TableCommon

Copy copies a TableCommon struct, and reset its column cache. This is not a deep copy.

func (*TableCommon) DeletableCols 

func (t *TableCommon) DeletableCols() []*table.Column

DeletableCols implements table DeletableCols interface.

func (*TableCommon) DeletableIndices 

func (t *TableCommon) DeletableIndices() []table.Index

DeletableIndices implements table.Table DeletableIndices interface.

func (*TableCommon) FullHiddenColsAndVisibleCols 

func (t *TableCommon) FullHiddenColsAndVisibleCols() []*table.Column

FullHiddenColsAndVisibleCols implements table FullHiddenColsAndVisibleCols interface.

func (*TableCommon) GetPartitionedTable 

func (t *TableCommon) GetPartitionedTable() table.PartitionedTable

GetPartitionedTable implements table.Table GetPhysicalID interface.

func (*TableCommon) GetPhysicalID 

func (t *TableCommon) GetPhysicalID() int64

GetPhysicalID implements table.Table GetPhysicalID interface.

func (*TableCommon) GetSequenceCommon 

func (t *TableCommon) GetSequenceCommon() *sequenceCommon

GetSequenceCommon is used in test to get sequenceCommon.

func (*TableCommon) GetSequenceID 

func (t *TableCommon) GetSequenceID() int64

GetSequenceID implements util.SequenceTable GetSequenceID interface.

func (*TableCommon) GetSequenceNextVal 

func (t *TableCommon) GetSequenceNextVal(ctx any, dbName, seqName string) (nextVal int64, err error)

GetSequenceNextVal implements util.SequenceTable GetSequenceNextVal interface. Caching the sequence value in table, we can easily be notified with the cache empty, and write the binlogInfo in table level rather than in allocator.

func (*TableCommon) HiddenCols 

func (t *TableCommon) HiddenCols() []*table.Column

HiddenCols implements table.Table HiddenCols interface.

func (*TableCommon) IndexPrefix 

func (t *TableCommon) IndexPrefix() kv.Key

IndexPrefix implements table.Table interface.

func (*TableCommon) Indices 

func (t *TableCommon) Indices() []table.Index

Indices implements table.Table Indices interface.

func (*TableCommon) Meta 

func (t *TableCommon) Meta() *model.TableInfo

Meta implements table.Table Meta interface.

func (*TableCommon) RecordKey 

func (t *TableCommon) RecordKey(h kv.Handle) kv.Key

RecordKey implements table.Table interface.

func (*TableCommon) RecordPrefix 

func (t *TableCommon) RecordPrefix() kv.Key

RecordPrefix implements table.Table interface.

func (*TableCommon) RemoveRecord 

func (t *TableCommon) RemoveRecord(ctx table.MutateContext, txn kv.Transaction, h kv.Handle, r []types.Datum, opts ...table.RemoveRecordOption) error

RemoveRecord implements table.Table RemoveRecord interface.

func (*TableCommon) ResetColumnsCache 

func (t *TableCommon) ResetColumnsCache()

ResetColumnsCache implements testingKnob interface.

func (*TableCommon) SetSequenceVal 

func (t *TableCommon) SetSequenceVal(ctx any, newVal int64, dbName, seqName string) (int64, bool, error)

SetSequenceVal implements util.SequenceTable SetSequenceVal interface. The returned bool indicates the newVal is already under the base.

func (*TableCommon) Type 

func (t *TableCommon) Type() table.Type

Type implements table.Table Type interface.

func (*TableCommon) UpdateRecord 

func (t *TableCommon) UpdateRecord(ctx table.MutateContext, txn kv.Transaction, h kv.Handle, oldData, newData []types.Datum, touched []bool, opts ...table.UpdateRecordOption) error

UpdateRecord implements table.Table UpdateRecord interface. `touched` means which columns are really modified, used for secondary indices. Length of `oldData` and `newData` equals to length of `t.WritableCols()`.

func (*TableCommon) VisibleCols 

func (t *TableCommon) VisibleCols() []*table.Column

VisibleCols implements table.Table VisibleCols interface.

func (*TableCommon) WritableCols 

func (t *TableCommon) WritableCols() []*table.Column

WritableCols implements table WritableCols interface.

func (*TableCommon) WritableConstraint 

func (t *TableCommon) WritableConstraint() []*table.Constraint

WritableConstraint returns constraints of the table in writable states.

type TemporaryTable 

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

TemporaryTable is used to store transaction-specific or session-specific information for global / local temporary tables. For example, stats and autoID should have their own copies of data, instead of being shared by all sessions.

func (*TemporaryTable) GetAutoIDAllocator 

func (t *TemporaryTable) GetAutoIDAllocator() autoid.Allocator

GetAutoIDAllocator is implemented from TempTable.GetAutoIDAllocator.

func (*TemporaryTable) GetMeta 

func (t *TemporaryTable) GetMeta() *model.TableInfo

GetMeta gets the table meta.

func (*TemporaryTable) GetModified 

func (t *TemporaryTable) GetModified() bool

GetModified is implemented from TempTable.GetModified.

func (*TemporaryTable) GetSize 

func (t *TemporaryTable) GetSize() int64

GetSize gets the table size.

func (*TemporaryTable) GetStats 

func (t *TemporaryTable) GetStats() any

GetStats is implemented from TempTable.GetStats.

func (*TemporaryTable) SetModified 

func (t *TemporaryTable) SetModified(modified bool)

SetModified is implemented from TempTable.SetModified.

func (*TemporaryTable) SetSize 

func (t *TemporaryTable) SetSize(v int64)

SetSize sets the table size.

Source Files

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