model

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 Go to latest Published: Aug 23, 2023 License: Apache-2.0, Apache-2.0 Imports: 15 Imported by: 0

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Constants

View Source 
const (
	// FlagIgnoreTruncate indicates if truncate error should be ignored.
	// Read-only statements should ignore truncate error, write statements should not ignore truncate error.
	FlagIgnoreTruncate uint64 = 1
	// FlagTruncateAsWarning indicates if truncate error should be returned as warning.
	// This flag only matters if FlagIgnoreTruncate is not set, in strict sql mode, truncate error should
	// be returned as error, in non-strict sql mode, truncate error should be saved as warning.
	FlagTruncateAsWarning = 1 << 1
	// FlagPadCharToFullLength indicates if sql_mode 'PAD_CHAR_TO_FULL_LENGTH' is set.
	FlagPadCharToFullLength = 1 << 2
	// FlagInInsertStmt indicates if this is a INSERT statement.
	FlagInInsertStmt = 1 << 3
	// FlagInUpdateOrDeleteStmt indicates if this is a UPDATE statement or a DELETE statement.
	FlagInUpdateOrDeleteStmt = 1 << 4
	// FlagInSelectStmt indicates if this is a SELECT statement.
	FlagInSelectStmt = 1 << 5
	// FlagOverflowAsWarning indicates if overflow error should be returned as warning.
	// In strict sql mode, overflow error should be returned as error,
	// in non-strict sql mode, overflow error should be saved as warning.
	FlagOverflowAsWarning = 1 << 6
	// FlagIgnoreZeroInDate indicates if ZeroInDate error should be ignored.
	// Read-only statements should ignore ZeroInDate error.
	// Write statements should not ignore ZeroInDate error in strict sql mode.
	FlagIgnoreZeroInDate = 1 << 7
	// FlagDividedByZeroAsWarning indicates if DividedByZero should be returned as warning.
	FlagDividedByZeroAsWarning = 1 << 8
	// FlagInSetOprStmt indicates if this is a UNION/EXCEPT/INTERSECT statement.
	FlagInSetOprStmt = 1 << 9
	// FlagInLoadDataStmt indicates if this is a LOAD DATA statement.
	FlagInLoadDataStmt = 1 << 10
	// FlagInRestrictedSQL indicates if this request is in a restricted SQL. Auto Analyze is one example
	FlagInRestrictedSQL = 1 << 11
)

Flags are used by tipb.SelectRequest.Flags to handle execution mode, like how to handle truncate error.

View Source 
const (
	// ColumnInfoVersion0 means the column info version is 0.
	ColumnInfoVersion0 = uint64(0)
	// ColumnInfoVersion1 means the column info version is 1.
	ColumnInfoVersion1 = uint64(1)
	// ColumnInfoVersion2 means the column info version is 2.
	// This is for v2.1.7 to Compatible with older versions charset problem.
	// Old version such as v2.0.8 treat utf8 as utf8mb4, because there is no UTF8 check in v2.0.8.
	// After version V2.1.2 (PR#8738) , TiDB add UTF8 check, then the user upgrade from v2.0.8 insert some UTF8MB4 characters will got error.
	// This is not compatibility for user. Then we try to fix this in PR #9820, and increase the version number.
	ColumnInfoVersion2 = uint64(2)

	// CurrLatestColumnInfoVersion means the latest column info in the current TiDB.
	CurrLatestColumnInfoVersion = ColumnInfoVersion2
)
View Source 
const (
	// TableInfoVersion0 means the table info version is 0.
	// Upgrade from v2.1.1 or v2.1.2 to v2.1.3 and later, and then execute a "change/modify column" statement
	// that does not specify a charset value for column. Then the following error may be reported:
	// ERROR 1105 (HY000): unsupported modify charset from utf8mb4 to utf8.
	// To eliminate this error, we will not modify the charset of this column
	// when executing a change/modify column statement that does not specify a charset value for column.
	// This behavior is not compatible with MySQL.
	TableInfoVersion0 = uint16(0)
	// TableInfoVersion1 means the table info version is 1.
	// When we execute a change/modify column statement that does not specify a charset value for column,
	// we set the charset of this column to the charset of table. This behavior is compatible with MySQL.
	TableInfoVersion1 = uint16(1)
	// TableInfoVersion2 means the table info version is 2.
	// This is for v2.1.7 to Compatible with older versions charset problem.
	// Old version such as v2.0.8 treat utf8 as utf8mb4, because there is no UTF8 check in v2.0.8.
	// After version V2.1.2 (PR#8738) , TiDB add UTF8 check, then the user upgrade from v2.0.8 insert some UTF8MB4 characters will got error.
	// This is not compatibility for user. Then we try to fix this in PR #9820, and increase the version number.
	TableInfoVersion2 = uint16(2)
	// TableInfoVersion3 means the table info version is 3.
	// This version aims to deal with upper-cased charset name in TableInfo stored by versions prior to TiDB v2.1.9:
	// TiDB always suppose all charsets / collations as lower-cased and try to convert them if they're not.
	// However, the convert is missed in some scenarios before v2.1.9, so for all those tables prior to TableInfoVersion3, their
	// charsets / collations will be converted to lower-case while loading from the storage.
	TableInfoVersion3 = uint16(3)
	// TableInfoVersion4 is not used.
	TableInfoVersion4 = uint16(4)
	// TableInfoVersion5 indicates that the auto_increment allocator in TiDB has been separated from
	// _tidb_rowid allocator when AUTO_ID_CACHE is 1. This version is introduced to preserve the compatibility of old tables:
	// the tables with version <= TableInfoVersion4 still use a single allocator for auto_increment and _tidb_rowid.
	// Also see https://github.com/wuhuizuo/tidb6/issues/982.
	TableInfoVersion5 = uint16(5)

	// CurrLatestTableInfoVersion means the latest table info in the current TiDB.
	CurrLatestTableInfoVersion = TableInfoVersion5
)
View Source 
const (
	DefaultSequenceCacheBool          = true
	DefaultSequenceCycleBool          = false
	DefaultSequenceOrderBool          = false
	DefaultSequenceCacheValue         = int64(1000)
	DefaultSequenceIncrementValue     = int64(1)
	DefaultPositiveSequenceStartValue = int64(1)
	DefaultNegativeSequenceStartValue = int64(-1)
	DefaultPositiveSequenceMinValue   = int64(1)
	DefaultPositiveSequenceMaxValue   = int64(9223372036854775806)
	DefaultNegativeSequenceMaxValue   = int64(-1)
	DefaultNegativeSequenceMinValue   = int64(-9223372036854775807)
)
View Source 
const (
	// FKVersion0 indicate the FKInfo version is 0.
	// In FKVersion0, TiDB only supported syntax of foreign key, but the foreign key constraint doesn't take effect.
	FKVersion0 = 0
	// FKVersion1 indicate the FKInfo version is 1.
	// In FKVersion1, TiDB supports the foreign key constraint.
	FKVersion1 = 1
)
View Source 
const EmptyColumnInfoSize = int64(unsafe.Sizeof(ColumnInfo{}))

EmptyColumnInfoSize is the memory usage of ColumnInfoSize

View Source 
const ExtraHandleID = -1

ExtraHandleID is the column ID of column which we need to append to schema to occupy the handle's position for use of execution phase.

View Source 
const ExtraPhysTblID = -3

ExtraPhysTblID is the column ID of column that should be filled in with the physical table id. Primarily used for table partition dynamic prune mode, to return which partition (physical table id) the row came from. Using a dedicated id for this, since in the future ExtraPidColID and ExtraPhysTblID may be used for the same request. Must be after ExtraPidColID!

View Source 
const ExtraPidColID = -2

ExtraPidColID is the column ID of column which store the partitionID decoded in global index values.

Variables

View Source 
var ExtraHandleName = NewCIStr("_tidb_rowid")

ExtraHandleName is the name of ExtraHandle Column.

View Source 
var ExtraPartitionIdName = NewCIStr("_tidb_pid") //nolint:revive

ExtraPartitionIdName is the name of ExtraPartitionId Column.

View Source 
var ExtraPhysTblIdName = NewCIStr("_tidb_tid") //nolint:revive

ExtraPhysTblIdName is the name of ExtraPhysTblID Column.

Functions

func IsIndexPrefixCovered 

func IsIndexPrefixCovered(tbInfo *TableInfo, index *IndexInfo, cols ...CIStr) bool

IsIndexPrefixCovered checks the index's columns beginning with the cols.

func LessDBInfo 

func LessDBInfo(a *DBInfo, b *DBInfo) bool

LessDBInfo is used for sorting DBInfo by DBInfo.Name.

func TSConvert2Time 

func TSConvert2Time(ts uint64) time.Time

TSConvert2Time converts timestamp to time.

Types

type ActionType 

type ActionType byte

ActionType is the type for DDL action. 

const (
	ActionNone                          ActionType = 0
	ActionCreateSchema                  ActionType = 1
	ActionDropSchema                    ActionType = 2
	ActionCreateTable                   ActionType = 3
	ActionDropTable                     ActionType = 4
	ActionAddColumn                     ActionType = 5
	ActionDropColumn                    ActionType = 6
	ActionAddIndex                      ActionType = 7
	ActionDropIndex                     ActionType = 8
	ActionAddForeignKey                 ActionType = 9
	ActionDropForeignKey                ActionType = 10
	ActionTruncateTable                 ActionType = 11
	ActionModifyColumn                  ActionType = 12
	ActionRebaseAutoID                  ActionType = 13
	ActionRenameTable                   ActionType = 14
	ActionSetDefaultValue               ActionType = 15
	ActionShardRowID                    ActionType = 16
	ActionModifyTableComment            ActionType = 17
	ActionRenameIndex                   ActionType = 18
	ActionAddTablePartition             ActionType = 19
	ActionDropTablePartition            ActionType = 20
	ActionCreateView                    ActionType = 21
	ActionModifyTableCharsetAndCollate  ActionType = 22
	ActionTruncateTablePartition        ActionType = 23
	ActionDropView                      ActionType = 24
	ActionRecoverTable                  ActionType = 25
	ActionModifySchemaCharsetAndCollate ActionType = 26
	ActionLockTable                     ActionType = 27
	ActionUnlockTable                   ActionType = 28
	ActionRepairTable                   ActionType = 29
	ActionSetTiFlashReplica             ActionType = 30
	ActionUpdateTiFlashReplicaStatus    ActionType = 31
	ActionAddPrimaryKey                 ActionType = 32
	ActionDropPrimaryKey                ActionType = 33
	ActionCreateSequence                ActionType = 34
	ActionAlterSequence                 ActionType = 35
	ActionDropSequence                  ActionType = 36
	ActionAddColumns                    ActionType = 37 // Deprecated, we use ActionMultiSchemaChange instead.
	ActionDropColumns                   ActionType = 38 // Deprecated, we use ActionMultiSchemaChange instead.
	ActionModifyTableAutoIdCache        ActionType = 39 //nolint:revive
	ActionRebaseAutoRandomBase          ActionType = 40
	ActionAlterIndexVisibility          ActionType = 41
	ActionExchangeTablePartition        ActionType = 42
	ActionAddCheckConstraint            ActionType = 43
	ActionDropCheckConstraint           ActionType = 44
	ActionAlterCheckConstraint          ActionType = 45

	ActionRenameTables                  ActionType = 47
	ActionDropIndexes                   ActionType = 48 // Deprecated, we use ActionMultiSchemaChange instead.
	ActionAlterTableAttributes          ActionType = 49
	ActionAlterTablePartitionAttributes ActionType = 50
	ActionCreatePlacementPolicy         ActionType = 51
	ActionAlterPlacementPolicy          ActionType = 52
	ActionDropPlacementPolicy           ActionType = 53
	ActionAlterTablePartitionPlacement  ActionType = 54
	ActionModifySchemaDefaultPlacement  ActionType = 55
	ActionAlterTablePlacement           ActionType = 56
	ActionAlterCacheTable               ActionType = 57
	ActionAlterTableStatsOptions        ActionType = 58
	ActionAlterNoCacheTable             ActionType = 59
	ActionCreateTables                  ActionType = 60
	ActionMultiSchemaChange             ActionType = 61
	ActionFlashbackCluster              ActionType = 62
	ActionRecoverSchema                 ActionType = 63
	ActionReorganizePartition           ActionType = 64

	ActionAlterTTLInfo   ActionType = 65
	ActionAlterTTLRemove ActionType = 67
)

List DDL actions.

func (ActionType) String 

func (action ActionType) String() string

String return current ddl action in string

type AffectedOption 

type AffectedOption struct {
	SchemaID    int64 `json:"schema_id"`
	TableID     int64 `json:"table_id"`
	OldTableID  int64 `json:"old_table_id"`
	OldSchemaID int64 `json:"old_schema_id"`
}

AffectedOption is used when a ddl affects multi tables.

type BackfillState 

type BackfillState byte

BackfillState is the state used by the backfill-merge process. 

const (
	// BackfillStateInapplicable means the backfill-merge process is not used.
	BackfillStateInapplicable BackfillState = iota
	// BackfillStateRunning is the state that the backfill process is running.
	// In this state, the index's write and delete operations are redirected to a temporary index.
	BackfillStateRunning
	// BackfillStateReadyToMerge is the state that the temporary index's records are ready to be merged back
	// to the origin index.
	// In this state, the index's write and delete operations are copied to a temporary index.
	// This state is used to make sure that all the TiDB instances are aware of the copy during the merge(BackfillStateMerging).
	BackfillStateReadyToMerge
	// BackfillStateMerging is the state that the temp index is merging back to the origin index.
	// In this state, the index's write and delete operations are copied to a temporary index.
	BackfillStateMerging
)

func (BackfillState) String 

func (s BackfillState) String() string

String implements fmt.Stringer interface.

type CIStr 

type CIStr struct {
	O string `json:"O"` // Original string.
	L string `json:"L"` // Lower case string.
}

CIStr is case insensitive string.

func NewCIStr 

func NewCIStr(s string) (cs CIStr)

NewCIStr creates a new CIStr.

func (*CIStr) MemoryUsage 

func (cis *CIStr) MemoryUsage() (sum int64)

MemoryUsage return the memory usage of CIStr

func (CIStr) String 

func (cis CIStr) String() string

String implements fmt.Stringer interface.

func (*CIStr) UnmarshalJSON 

func (cis *CIStr) UnmarshalJSON(b []byte) error

UnmarshalJSON implements the user defined unmarshal method. CIStr can be unmarshaled from a single string, so PartitionDefinition.Name in this change https://github.com/wuhuizuo/tidb6/pull/6460/files would be compatible during TiDB upgrading.

type ChangeStateInfo 

type ChangeStateInfo struct {
	// DependencyColumnOffset is the changing column offset that the current column depends on when executing modify/change column.
	DependencyColumnOffset int `json:"relative_col_offset"`
}

ChangeStateInfo is used for recording the information of schema changing.

type ColumnChoice 

type ColumnChoice byte

ColumnChoice is the type of the column choice. 

const (
	DefaultChoice ColumnChoice = iota
	AllColumns
	PredicateColumns
	ColumnList
)

func (ColumnChoice) String 

func (s ColumnChoice) String() string

type ColumnInfo 

type ColumnInfo struct {
	ID                    int64       `json:"id"`
	Name                  CIStr       `json:"name"`
	Offset                int         `json:"offset"`
	OriginDefaultValue    interface{} `json:"origin_default"`
	OriginDefaultValueBit []byte      `json:"origin_default_bit"`
	DefaultValue          interface{} `json:"default"`
	DefaultValueBit       []byte      `json:"default_bit"`
	// DefaultIsExpr is indicates the default value string is expr.
	DefaultIsExpr       bool                `json:"default_is_expr"`
	GeneratedExprString string              `json:"generated_expr_string"`
	GeneratedStored     bool                `json:"generated_stored"`
	Dependences         map[string]struct{} `json:"dependences"`
	FieldType           types.FieldType     `json:"type"`
	State               SchemaState         `json:"state"`
	Comment             string              `json:"comment"`
	// A hidden column is used internally(expression index) and are not accessible by users.
	Hidden           bool `json:"hidden"`
	*ChangeStateInfo `json:"change_state_info"`
	// Version means the version of the column info.
	// Version = 0: For OriginDefaultValue and DefaultValue of timestamp column will stores the default time in system time zone.
	//              That is a bug if multiple TiDB servers in different system time zone.
	// Version = 1: For OriginDefaultValue and DefaultValue of timestamp column will stores the default time in UTC time zone.
	//              This will fix bug in version 0. For compatibility with version 0, we add version field in column info struct.
	Version uint64 `json:"version"`
}

ColumnInfo provides meta data describing of a table column.

func FindColumnInfo 

func FindColumnInfo(cols []*ColumnInfo, name string) *ColumnInfo

FindColumnInfo finds ColumnInfo in cols by name.

func FindColumnInfoByID 

func FindColumnInfoByID(cols []*ColumnInfo, id int64) *ColumnInfo

FindColumnInfoByID finds ColumnInfo in cols by id.

func NewExtraHandleColInfo 

func NewExtraHandleColInfo() *ColumnInfo

NewExtraHandleColInfo mocks a column info for extra handle column.

func NewExtraPartitionIDColInfo 

func NewExtraPartitionIDColInfo() *ColumnInfo

NewExtraPartitionIDColInfo mocks a column info for extra partition id column.

func NewExtraPhysTblIDColInfo 

func NewExtraPhysTblIDColInfo() *ColumnInfo

NewExtraPhysTblIDColInfo mocks a column info for extra partition id column.

func (*ColumnInfo) AddFlag 

func (c *ColumnInfo) AddFlag(flag uint)

AddFlag adds the flag of ColumnInfo.

func (*ColumnInfo) AndFlag 

func (c *ColumnInfo) AndFlag(flag uint)

AndFlag adds a flag to the column.

func (*ColumnInfo) Clone 

func (c *ColumnInfo) Clone() *ColumnInfo

Clone clones ColumnInfo.

func (*ColumnInfo) DelFlag 

func (c *ColumnInfo) DelFlag(flag uint)

DelFlag removes the flag from the column's flag.

func (*ColumnInfo) GetCharset 

func (c *ColumnInfo) GetCharset() string

GetCharset returns the charset of ColumnInfo.

func (*ColumnInfo) GetCollate 

func (c *ColumnInfo) GetCollate() string

GetCollate returns the collation of ColumnInfo.

func (*ColumnInfo) GetDecimal 

func (c *ColumnInfo) GetDecimal() int

GetDecimal returns the decimal of ColumnInfo.

func (*ColumnInfo) GetDefaultValue 

func (c *ColumnInfo) GetDefaultValue() interface{}

GetDefaultValue gets the default value of the column. Default value use to stored in DefaultValue field, but now, bit type default value will store in DefaultValueBit for fix bit default value decode/encode bug.

func (*ColumnInfo) GetElems 

func (c *ColumnInfo) GetElems() []string

GetElems returns the elems of ColumnInfo.

func (*ColumnInfo) GetFlag 

func (c *ColumnInfo) GetFlag() uint

GetFlag returns the flag of ColumnInfo.

func (*ColumnInfo) GetFlen 

func (c *ColumnInfo) GetFlen() int

GetFlen returns the flen of ColumnInfo.

func (*ColumnInfo) GetOriginDefaultValue 

func (c *ColumnInfo) GetOriginDefaultValue() interface{}

GetOriginDefaultValue gets the origin default value.

func (*ColumnInfo) GetType 

func (c *ColumnInfo) GetType() byte

GetType returns the type of ColumnInfo.

func (*ColumnInfo) GetTypeDesc 

func (c *ColumnInfo) GetTypeDesc() string

GetTypeDesc gets the description for column type.

func (*ColumnInfo) IsGenerated 

func (c *ColumnInfo) IsGenerated() bool

IsGenerated returns true if the column is generated column.

func (*ColumnInfo) SetCharset 

func (c *ColumnInfo) SetCharset(charset string)

SetCharset sets charset of the ColumnInfo

func (*ColumnInfo) SetCollate 

func (c *ColumnInfo) SetCollate(collate string)

SetCollate sets the collation of the column.

func (*ColumnInfo) SetDecimal 

func (c *ColumnInfo) SetDecimal(decimal int)

SetDecimal sets the decimal of ColumnInfo.

func (*ColumnInfo) SetDefaultValue 

func (c *ColumnInfo) SetDefaultValue(value interface{}) error

SetDefaultValue sets the default value.

func (*ColumnInfo) SetElems 

func (c *ColumnInfo) SetElems(elems []string)

SetElems set the elements of enum column.

func (*ColumnInfo) SetFlag 

func (c *ColumnInfo) SetFlag(flag uint)

SetFlag set the flag of ColumnInfo.

func (*ColumnInfo) SetFlen 

func (c *ColumnInfo) SetFlen(flen int)

SetFlen sets the flen of ColumnInfo.

func (*ColumnInfo) SetOriginDefaultValue 

func (c *ColumnInfo) SetOriginDefaultValue(value interface{}) error

SetOriginDefaultValue sets the origin default value. For mysql.TypeBit type, the default value storage format must be a string. Other value such as int must convert to string format first. The mysql.TypeBit type supports the null default value.

func (*ColumnInfo) SetType 

func (c *ColumnInfo) SetType(tp byte)

SetType set the type of ColumnInfo.

func (*ColumnInfo) ToggleFlag 

func (c *ColumnInfo) ToggleFlag(flag uint)

ToggleFlag flips the flag according to the value.

type ConstraintInfo 

type ConstraintInfo struct {
	ID             int64       `json:"id"`
	Name           CIStr       `json:"constraint_name"`
	Table          CIStr       `json:"tbl_name"`        // Table name.
	ConstraintCols []CIStr     `json:"constraint_cols"` // Depended column names.
	Enforced       bool        `json:"enforced"`
	InColumn       bool        `json:"in_column"` // Indicate whether the constraint is column type check.
	ExprString     string      `json:"expr_string"`
	State          SchemaState `json:"state"`
}

ConstraintInfo provides meta data describing check-expression constraint.

func (*ConstraintInfo) Clone 

func (ci *ConstraintInfo) Clone() *ConstraintInfo

Clone clones ConstraintInfo.

type DBInfo 

type DBInfo struct {
	ID                 int64          `json:"id"`      // Database ID
	Name               CIStr          `json:"db_name"` // DB name.
	Charset            string         `json:"charset"`
	Collate            string         `json:"collate"`
	Tables             []*TableInfo   `json:"-"` // Tables in the DB.
	State              SchemaState    `json:"state"`
	PlacementPolicyRef *PolicyRefInfo `json:"policy_ref_info"`
}

DBInfo provides meta data describing a DB.

func (*DBInfo) Clone 

func (db *DBInfo) Clone() *DBInfo

Clone clones DBInfo.

func (*DBInfo) Copy 

func (db *DBInfo) Copy() *DBInfo

Copy shallow copies DBInfo.

type DDLReorgMeta 

type DDLReorgMeta struct {
	// EndHandle is the last handle of the adding indices table.
	// We should only backfill indices in the range [startHandle, EndHandle].
	EndHandle int64 `json:"end_handle"`

	SQLMode       mysql.SQLMode                    `json:"sql_mode"`
	Warnings      map[errors.ErrorID]*terror.Error `json:"warnings"`
	WarningsCount map[errors.ErrorID]int64         `json:"warnings_count"`
	Location      *TimeZoneLocation                `json:"location"`
	ReorgTp       ReorgType                        `json:"reorg_tp"`
}

DDLReorgMeta is meta info of DDL reorganization.

func NewDDLReorgMeta 

func NewDDLReorgMeta() *DDLReorgMeta

NewDDLReorgMeta new a DDLReorgMeta.

type ExchangePartitionInfo 

type ExchangePartitionInfo struct {
	ExchangePartitionFlag  bool  `json:"exchange_partition_flag"`
	ExchangePartitionID    int64 `json:"exchange_partition_id"`
	ExchangePartitionDefID int64 `json:"exchange_partition_def_id"`
}

ExchangePartitionInfo provides exchange partition info.

type FKInfo 

type FKInfo struct {
	ID        int64       `json:"id"`
	Name      CIStr       `json:"fk_name"`
	RefSchema CIStr       `json:"ref_schema"`
	RefTable  CIStr       `json:"ref_table"`
	RefCols   []CIStr     `json:"ref_cols"`
	Cols      []CIStr     `json:"cols"`
	OnDelete  int         `json:"on_delete"`
	OnUpdate  int         `json:"on_update"`
	State     SchemaState `json:"state"`
	Version   int         `json:"version"`
}

FKInfo provides meta data describing a foreign key constraint.

func FindFKInfoByName 

func FindFKInfoByName(fks []*FKInfo, name string) *FKInfo

FindFKInfoByName finds FKInfo in fks by lowercase name.

func (*FKInfo) Clone 

func (fk *FKInfo) Clone() *FKInfo

Clone clones FKInfo.

func (*FKInfo) String 

func (fk *FKInfo) String(db, tb string) string

type HistoryInfo 

type HistoryInfo struct {
	SchemaVersion int64
	DBInfo        *DBInfo
	TableInfo     *TableInfo
	FinishedTS    uint64

	// MultipleTableInfos is like TableInfo but only for operations updating multiple tables.
	MultipleTableInfos []*TableInfo
}

HistoryInfo is used for binlog.

func (*HistoryInfo) AddDBInfo 

func (h *HistoryInfo) AddDBInfo(schemaVer int64, dbInfo *DBInfo)

AddDBInfo adds schema version and schema information that are used for binlog. dbInfo is added in the following operations: create database, drop database.

func (*HistoryInfo) AddTableInfo 

func (h *HistoryInfo) AddTableInfo(schemaVer int64, tblInfo *TableInfo)

AddTableInfo adds schema version and table information that are used for binlog. tblInfo is added except for the following operations: create database, drop database.

func (*HistoryInfo) Clean 

func (h *HistoryInfo) Clean()

Clean cleans history information.

func (*HistoryInfo) SetTableInfos 

func (h *HistoryInfo) SetTableInfos(schemaVer int64, tblInfos []*TableInfo)

SetTableInfos is like AddTableInfo, but will add multiple table infos to the binlog.

type IndexColumn 

type IndexColumn struct {
	Name   CIStr `json:"name"`   // Index name
	Offset int   `json:"offset"` // Index offset
	// Length of prefix when using column prefix
	// for indexing;
	// UnspecifedLength if not using prefix indexing
	Length int `json:"length"`
}

IndexColumn provides index column info.

func FindIndexColumnByName 

func FindIndexColumnByName(indexCols []*IndexColumn, nameL string) (int, *IndexColumn)

FindIndexColumnByName finds IndexColumn by name. When IndexColumn is not found, returns (-1, nil).

func (*IndexColumn) Clone 

func (i *IndexColumn) Clone() *IndexColumn

Clone clones IndexColumn.

type IndexInfo 

type IndexInfo struct {
	ID            int64          `json:"id"`
	Name          CIStr          `json:"idx_name"` // Index name.
	Table         CIStr          `json:"tbl_name"` // Table name.
	Columns       []*IndexColumn `json:"idx_cols"` // Index columns.
	State         SchemaState    `json:"state"`
	BackfillState BackfillState  `json:"backfill_state"`
	Comment       string         `json:"comment"`      // Comment
	Tp            IndexType      `json:"index_type"`   // Index type: Btree, Hash or Rtree
	Unique        bool           `json:"is_unique"`    // Whether the index is unique.
	Primary       bool           `json:"is_primary"`   // Whether the index is primary key.
	Invisible     bool           `json:"is_invisible"` // Whether the index is invisible.
	Global        bool           `json:"is_global"`    // Whether the index is global.
}

IndexInfo provides meta data describing a DB index. It corresponds to the statement `CREATE INDEX Name ON Table (Column);` See https://dev.mysql.com/doc/refman/5.7/en/create-index.html

func FindIndexByColumns 

func FindIndexByColumns(tbInfo *TableInfo, cols ...CIStr) *IndexInfo

FindIndexByColumns find IndexInfo in indices which is cover the specified columns.

func FindIndexInfoByID 

func FindIndexInfoByID(indices []*IndexInfo, id int64) *IndexInfo

FindIndexInfoByID finds IndexInfo in indices by id.

func (*IndexInfo) Clone 

func (index *IndexInfo) Clone() *IndexInfo

Clone clones IndexInfo.

func (*IndexInfo) FindColumnByName 

func (index *IndexInfo) FindColumnByName(nameL string) *IndexColumn

FindColumnByName finds the index column with the specified name.

func (*IndexInfo) HasColumnInIndexColumns 

func (index *IndexInfo) HasColumnInIndexColumns(tblInfo *TableInfo, colID int64) bool

HasColumnInIndexColumns checks whether the index contains the column with the specified ID.

func (*IndexInfo) HasPrefixIndex 

func (index *IndexInfo) HasPrefixIndex() bool

HasPrefixIndex returns whether any columns of this index uses prefix length.

type IndexType 

type IndexType int

IndexType is the type of index 

const (
	IndexTypeInvalid IndexType = iota
	IndexTypeBtree
	IndexTypeHash
	IndexTypeRtree
)

IndexTypes

func (IndexType) String 

func (t IndexType) String() string

String implements Stringer interface.

type Job 

type Job struct {
	ID         int64         `json:"id"`
	Type       ActionType    `json:"type"`
	SchemaID   int64         `json:"schema_id"`
	TableID    int64         `json:"table_id"`
	SchemaName string        `json:"schema_name"`
	TableName  string        `json:"table_name"`
	State      JobState      `json:"state"`
	Warning    *terror.Error `json:"warning"`
	Error      *terror.Error `json:"err"`
	// ErrorCount will be increased, every time we meet an error when running job.
	ErrorCount int64 `json:"err_count"`
	// RowCount means the number of rows that are processed.
	RowCount int64      `json:"row_count"`
	Mu       sync.Mutex `json:"-"`
	// CtxVars are variables attached to the job. It is for internal usage.
	// E.g. passing arguments between functions by one single *Job pointer.
	CtxVars []interface{} `json:"-"`
	Args    []interface{} `json:"-"`
	// RawArgs : We must use json raw message to delay parsing special args.
	RawArgs     json.RawMessage `json:"raw_args"`
	SchemaState SchemaState     `json:"schema_state"`
	// SnapshotVer means snapshot version for this job.
	SnapshotVer uint64 `json:"snapshot_ver"`
	// RealStartTS uses timestamp allocated by TSO.
	// Now it's the TS when we actually start the job.
	RealStartTS uint64 `json:"real_start_ts"`
	// StartTS uses timestamp allocated by TSO.
	// Now it's the TS when we put the job to TiKV queue.
	StartTS uint64 `json:"start_ts"`
	// DependencyID is the job's ID that the current job depends on.
	DependencyID int64 `json:"dependency_id"`
	// Query string of the ddl job.
	Query      string       `json:"query"`
	BinlogInfo *HistoryInfo `json:"binlog"`

	// Version indicates the DDL job version. For old jobs, it will be 0.
	Version int64 `json:"version"`

	// ReorgMeta is meta info of ddl reorganization.
	ReorgMeta *DDLReorgMeta `json:"reorg_meta"`

	// MultiSchemaInfo keeps some warning now for multi schema change.
	MultiSchemaInfo *MultiSchemaInfo `json:"multi_schema_info"`

	// Priority is only used to set the operation priority of adding indices.
	Priority int `json:"priority"`

	// SeqNum is the total order in all DDLs, it's used to identify the order of DDL.
	SeqNum uint64 `json:"seq_num"`

	// Charset is the charset when the DDL Job is created.
	Charset string `json:"charset"`
	// Collate is the collation the DDL Job is created.
	Collate string `json:"collate"`
}

Job is for a DDL operation.

func (*Job) Clone 

func (job *Job) Clone() *Job

Clone returns a copy of the job.

func (*Job) Decode 

func (job *Job) Decode(b []byte) error

Decode decodes job from the json buffer, we must use DecodeArgs later to decode special args for this job.

func (*Job) DecodeArgs 

func (job *Job) DecodeArgs(args ...interface{}) error

DecodeArgs decodes job args.

func (*Job) Encode 

func (job *Job) Encode(updateRawArgs bool) ([]byte, error)

Encode encodes job with json format. updateRawArgs is used to determine whether to update the raw args.

func (*Job) FinishDBJob 

func (job *Job) FinishDBJob(jobState JobState, schemaState SchemaState, ver int64, dbInfo *DBInfo)

FinishDBJob is called when a job is finished. It updates the job's state information and adds dbInfo the binlog.

func (*Job) FinishMultipleTableJob 

func (job *Job) FinishMultipleTableJob(jobState JobState, schemaState SchemaState, ver int64, tblInfos []*TableInfo)

FinishMultipleTableJob is called when a job is finished. It updates the job's state information and adds tblInfos to the binlog.

func (*Job) FinishTableJob 

func (job *Job) FinishTableJob(jobState JobState, schemaState SchemaState, ver int64, tblInfo *TableInfo)

FinishTableJob is called when a job is finished. It updates the job's state information and adds tblInfo to the binlog.

func (*Job) GetRowCount 

func (job *Job) GetRowCount() int64

GetRowCount gets the number of rows. Make sure it can pass `make race`.

func (*Job) GetWarnings 

func (job *Job) GetWarnings() (map[errors.ErrorID]*terror.Error, map[errors.ErrorID]int64)

GetWarnings gets the warnings of the rows handled.

func (*Job) IsCancelled 

func (job *Job) IsCancelled() bool

IsCancelled returns whether the job is cancelled or not.

func (*Job) IsCancelling 

func (job *Job) IsCancelling() bool

IsCancelling returns whether the job is cancelling or not.

func (*Job) IsDependentOn 

func (job *Job) IsDependentOn(other *Job) (bool, error)

IsDependentOn returns whether the job depends on "other". How to check the job depends on "other"? 1. The two jobs handle the same database when one of the two jobs is an ActionDropSchema or ActionCreateSchema type. 2. Or the two jobs handle the same table. 3. Or other job is flashback cluster.

func (*Job) IsDone 

func (job *Job) IsDone() bool

IsDone returns whether job is done.

func (*Job) IsFinished 

func (job *Job) IsFinished() bool

IsFinished returns whether job is finished or not. If the job state is Done or Cancelled, it is finished.

func (*Job) IsQueueing 

func (job *Job) IsQueueing() bool

IsQueueing returns whether job is queuing or not.

func (*Job) IsRollbackDone 

func (job *Job) IsRollbackDone() bool

IsRollbackDone returns whether the job is rolled back or not.

func (*Job) IsRollbackable 

func (job *Job) IsRollbackable() bool

IsRollbackable checks whether the job can be rollback.

func (*Job) IsRollingback 

func (job *Job) IsRollingback() bool

IsRollingback returns whether the job is rolling back or not.

func (*Job) IsRunning 

func (job *Job) IsRunning() bool

IsRunning returns whether job is still running or not.

func (*Job) IsSynced 

func (job *Job) IsSynced() bool

IsSynced returns whether the DDL modification is synced among all TiDB servers.

func (*Job) MarkNonRevertible 

func (job *Job) MarkNonRevertible()

MarkNonRevertible mark the current job to be non-revertible. It means the job cannot be cancelled or rollbacked.

func (*Job) MayNeedReorg 

func (job *Job) MayNeedReorg() bool

MayNeedReorg indicates that this job may need to reorganize the data.

func (*Job) NotStarted 

func (job *Job) NotStarted() bool

NotStarted returns true if the job is never run by a worker.

func (*Job) SetRowCount 

func (job *Job) SetRowCount(count int64)

SetRowCount sets the number of rows. Make sure it can pass `make race`.

func (*Job) SetWarnings 

func (job *Job) SetWarnings(warnings map[errors.ErrorID]*terror.Error, warningsCount map[errors.ErrorID]int64)

SetWarnings sets the warnings of rows handled.

func (*Job) String 

func (job *Job) String() string

String implements fmt.Stringer interface.

type JobState 

type JobState byte

JobState is for job state. 

const (
	JobStateNone    JobState = 0
	JobStateRunning JobState = 1
	// When DDL encountered an unrecoverable error at reorganization state,
	// some keys has been added already, we need to remove them.
	// JobStateRollingback is the state to do the rolling back job.
	JobStateRollingback  JobState = 2
	JobStateRollbackDone JobState = 3
	JobStateDone         JobState = 4
	JobStateCancelled    JobState = 5
	// JobStateSynced is used to mark the information about the completion of this job
	// has been synchronized to all servers.
	JobStateSynced JobState = 6
	// JobStateCancelling is used to mark the DDL job is cancelled by the client, but the DDL work hasn't handle it.
	JobStateCancelling JobState = 7
	// JobStateQueueing means the job has not yet been started.
	JobStateQueueing JobState = 8
)

List job states.

func (JobState) String 

func (s JobState) String() string

String implements fmt.Stringer interface.

type MultiSchemaInfo 

type MultiSchemaInfo struct {
	SubJobs    []*SubJob `json:"sub_jobs"`
	Revertible bool      `json:"revertible"`

	// SkipVersion is used to control whether generating a new schema version for a sub-job.
	SkipVersion bool `json:"-"`

	AddColumns    []CIStr `json:"-"`
	DropColumns   []CIStr `json:"-"`
	ModifyColumns []CIStr `json:"-"`
	AddIndexes    []CIStr `json:"-"`
	DropIndexes   []CIStr `json:"-"`
	AlterIndexes  []CIStr `json:"-"`
	ForeignKeys   []CIStr `json:"-"`

	RelativeColumns []CIStr `json:"-"`
	PositionColumns []CIStr `json:"-"`
}

MultiSchemaInfo keeps some information for multi schema change.

func NewMultiSchemaInfo 

func NewMultiSchemaInfo() *MultiSchemaInfo

NewMultiSchemaInfo new a MultiSchemaInfo.

type PartitionDefinition 

type PartitionDefinition struct {
	ID                 int64          `json:"id"`
	Name               CIStr          `json:"name"`
	LessThan           []string       `json:"less_than"`
	InValues           [][]string     `json:"in_values"`
	PlacementPolicyRef *PolicyRefInfo `json:"policy_ref_info"`
	Comment            string         `json:"comment,omitempty"`
}

PartitionDefinition defines a single partition.

func (*PartitionDefinition) Clone 

func (ci *PartitionDefinition) Clone() PartitionDefinition

Clone clones ConstraintInfo.

func (*PartitionDefinition) MemoryUsage 

func (ci *PartitionDefinition) MemoryUsage() (sum int64)

MemoryUsage return the memory usage of PartitionDefinition

type PartitionInfo 

type PartitionInfo struct {
	Type    PartitionType `json:"type"`
	Expr    string        `json:"expr"`
	Columns []CIStr       `json:"columns"`

	// User may already create table with partition but table partition is not
	// yet supported back then. When Enable is true, write/read need use tid
	// rather than pid.
	Enable bool `json:"enable"`

	Definitions []PartitionDefinition `json:"definitions"`
	// AddingDefinitions is filled when adding a partition that is in the mid state.
	AddingDefinitions []PartitionDefinition `json:"adding_definitions"`
	// DroppingDefinitions is filled when dropping a partition that is in the mid state.
	DroppingDefinitions []PartitionDefinition `json:"dropping_definitions"`
	States              []PartitionState      `json:"states"`
	Num                 uint64                `json:"num"`
}

PartitionInfo provides table partition info.

func (*PartitionInfo) Clone 

func (pi *PartitionInfo) Clone() *PartitionInfo

Clone clones itself.

func (*PartitionInfo) FindPartitionDefinitionByName 

func (pi *PartitionInfo) FindPartitionDefinitionByName(partitionDefinitionName string) int

FindPartitionDefinitionByName finds PartitionDefinition by name.

func (*PartitionInfo) GCPartitionStates 

func (pi *PartitionInfo) GCPartitionStates()

GCPartitionStates cleans up the partition state.

func (*PartitionInfo) GetNameByID 

func (pi *PartitionInfo) GetNameByID(id int64) string

GetNameByID gets the partition name by ID.

func (*PartitionInfo) GetStateByID 

func (pi *PartitionInfo) GetStateByID(id int64) SchemaState

GetStateByID gets the partition state by ID.

func (*PartitionInfo) SetStateByID 

func (pi *PartitionInfo) SetStateByID(id int64, state SchemaState)

SetStateByID sets the state of the partition by ID.

type PartitionState 

type PartitionState struct {
	ID    int64       `json:"id"`
	State SchemaState `json:"state"`
}

PartitionState is the state of the partition.

type PartitionType 

type PartitionType int

PartitionType is the type for PartitionInfo 

const (
	PartitionTypeRange      PartitionType = 1
	PartitionTypeHash       PartitionType = 2
	PartitionTypeList       PartitionType = 3
	PartitionTypeKey        PartitionType = 4
	PartitionTypeSystemTime PartitionType = 5
)

Partition types.

func (PartitionType) String 

func (p PartitionType) String() string

type PlacementSettings 

type PlacementSettings struct {
	PrimaryRegion       string `json:"primary_region"`
	Regions             string `json:"regions"`
	Learners            uint64 `json:"learners"`
	Followers           uint64 `json:"followers"`
	Voters              uint64 `json:"voters"`
	Schedule            string `json:"schedule"`
	Constraints         string `json:"constraints"`
	LeaderConstraints   string `json:"leader_constraints"`
	LearnerConstraints  string `json:"learner_constraints"`
	FollowerConstraints string `json:"follower_constraints"`
	VoterConstraints    string `json:"voter_constraints"`
	SurvivalPreferences string `json:"survival_preferences"`
}

PlacementSettings is the settings of the placement

func (*PlacementSettings) Clone 

func (p *PlacementSettings) Clone() *PlacementSettings

Clone clones the placement settings.

func (*PlacementSettings) String 

func (p *PlacementSettings) String() string

type PolicyInfo 

type PolicyInfo struct {
	*PlacementSettings
	ID    int64       `json:"id"`
	Name  CIStr       `json:"name"`
	State SchemaState `json:"state"`
}

PolicyInfo is the struct to store the placement policy.

func (*PolicyInfo) Clone 

func (p *PolicyInfo) Clone() *PolicyInfo

Clone clones PolicyInfo.

type PolicyRefInfo 

type PolicyRefInfo struct {
	ID   int64 `json:"id"`
	Name CIStr `json:"name"`
}

PolicyRefInfo is the struct to refer the placement policy.

type PrimaryKeyType 

type PrimaryKeyType int8

PrimaryKeyType is the type of primary key. Available values are "clustered", "nonclustered", and ""(default). 

const (
	PrimaryKeyTypeDefault PrimaryKeyType = iota
	PrimaryKeyTypeClustered
	PrimaryKeyTypeNonClustered
)

func (PrimaryKeyType) String 

func (p PrimaryKeyType) String() string

type ReferOptionType 

type ReferOptionType int

ReferOptionType is the type for refer options. 

const (
	ReferOptionNoOption ReferOptionType = iota
	ReferOptionRestrict
	ReferOptionCascade
	ReferOptionSetNull
	ReferOptionNoAction
	ReferOptionSetDefault
)

Refer option types.

func (ReferOptionType) String 

func (r ReferOptionType) String() string

String implements fmt.Stringer interface.

type ReferredFKInfo 

type ReferredFKInfo struct {
	Cols        []CIStr `json:"cols"`
	ChildSchema CIStr   `json:"child_schema"`
	ChildTable  CIStr   `json:"child_table"`
	ChildFKName CIStr   `json:"child_fk_name"`
}

ReferredFKInfo provides the cited foreign key in the child table.

type ReorgType 

type ReorgType int8

ReorgType indicates which process is used for the data reorganization. 

const (
	// ReorgTypeNone means the backfill task is not started yet.
	ReorgTypeNone ReorgType = iota
	// ReorgTypeTxn means the index records are backfill with transactions.
	// All the index KVs are written through the transaction interface.
	// This is the original backfill implementation.
	ReorgTypeTxn
	// ReorgTypeLitMerge means the index records are backfill with lightning.
	// The index KVs are encoded to SST files and imported to the storage directly.
	// The incremental index KVs written by DML are redirected to a temporary index.
	// After the backfill is finished, the temporary index records are merged back to the original index.
	ReorgTypeLitMerge
	// ReorgTypeTxnMerge means backfill with transactions and merge incremental changes.
	// The backfill index KVs are written through the transaction interface.
	// The incremental index KVs written by DML are redirected to a temporary index.
	// After the backfill is finished, the temporary index records are merged back to the original index.
	ReorgTypeTxnMerge
)

func (ReorgType) NeedMergeProcess 

func (tp ReorgType) NeedMergeProcess() bool

NeedMergeProcess means the incremental changes need to be merged.

func (ReorgType) String 

func (tp ReorgType) String() string

String implements fmt.Stringer interface.

type SchemaDiff 

type SchemaDiff struct {
	Version  int64      `json:"version"`
	Type     ActionType `json:"type"`
	SchemaID int64      `json:"schema_id"`
	TableID  int64      `json:"table_id"`

	// OldTableID is the table ID before truncate, only used by truncate table DDL.
	OldTableID int64 `json:"old_table_id"`
	// OldSchemaID is the schema ID before rename table, only used by rename table DDL.
	OldSchemaID int64 `json:"old_schema_id"`

	AffectedOpts []*AffectedOption `json:"affected_options"`
}

SchemaDiff contains the schema modification at a particular schema version. It is used to reduce schema reload cost.

type SchemaState 

type SchemaState byte

SchemaState is the state for schema elements. 

const (
	// StateNone means this schema element is absent and can't be used.
	StateNone SchemaState = iota
	// StateDeleteOnly means we can only delete items for this schema element.
	StateDeleteOnly
	// StateWriteOnly means we can use any write operation on this schema element,
	// but outer can't read the changed data.
	StateWriteOnly
	// StateWriteReorganization means we are re-organizing whole data after write only state.
	StateWriteReorganization
	// StateDeleteReorganization means we are re-organizing whole data after delete only state.
	StateDeleteReorganization
	// StatePublic means this schema element is ok for all write and read operations.
	StatePublic
	// StateReplicaOnly means we're waiting tiflash replica to be finished.
	StateReplicaOnly
	// StateGlobalTxnOnly means we can only use global txn for operator on this schema element
	StateGlobalTxnOnly
)

func (SchemaState) String 

func (s SchemaState) String() string

String implements fmt.Stringer interface.

type SequenceInfo 

type SequenceInfo struct {
	Start      int64  `json:"sequence_start"`
	Cache      bool   `json:"sequence_cache"`
	Cycle      bool   `json:"sequence_cycle"`
	MinValue   int64  `json:"sequence_min_value"`
	MaxValue   int64  `json:"sequence_max_value"`
	Increment  int64  `json:"sequence_increment"`
	CacheValue int64  `json:"sequence_cache_value"`
	Comment    string `json:"sequence_comment"`
}

SequenceInfo provide meta data describing a DB sequence.

type SessionInfo 

type SessionInfo struct {
	ServerID  string
	SessionID uint64
}

SessionInfo contain the session ID and the server ID.

func (SessionInfo) String 

func (s SessionInfo) String() string

type StatsOptions 

type StatsOptions struct {
	*StatsWindowSettings
	AutoRecalc   bool         `json:"auto_recalc"`
	ColumnChoice ColumnChoice `json:"column_choice"`
	ColumnList   []CIStr      `json:"column_list"`
	SampleNum    uint64       `json:"sample_num"`
	SampleRate   float64      `json:"sample_rate"`
	Buckets      uint64       `json:"buckets"`
	TopN         uint64       `json:"topn"`
	Concurrency  uint         `json:"concurrency"`
}

StatsOptions is the struct to store the stats options.

func NewStatsOptions 

func NewStatsOptions() *StatsOptions

NewStatsOptions creates a new StatsOptions.

type StatsWindowSettings 

type StatsWindowSettings struct {
	WindowStart    time.Time        `json:"window_start"`
	WindowEnd      time.Time        `json:"window_end"`
	RepeatType     WindowRepeatType `json:"repeat_type"`
	RepeatInterval uint             `json:"repeat_interval"`
}

StatsWindowSettings is the settings of the stats window.

type SubJob 

type SubJob struct {
	Type        ActionType      `json:"type"`
	Args        []interface{}   `json:"-"`
	RawArgs     json.RawMessage `json:"raw_args"`
	SchemaState SchemaState     `json:"schema_state"`
	SnapshotVer uint64          `json:"snapshot_ver"`
	Revertible  bool            `json:"revertible"`
	State       JobState        `json:"state"`
	RowCount    int64           `json:"row_count"`
	Warning     *terror.Error   `json:"warning"`
	CtxVars     []interface{}   `json:"-"`
	SchemaVer   int64           `json:"schema_version"`
}

SubJob is a representation of one DDL schema change. A Job may contain zero(when multi-schema change is not applicable) or more SubJobs.

func (*SubJob) FromProxyJob 

func (sub *SubJob) FromProxyJob(proxyJob *Job, ver int64)

FromProxyJob converts a proxy job to a sub-job.

func (*SubJob) IsFinished 

func (sub *SubJob) IsFinished() bool

IsFinished returns true if the job is done.

func (*SubJob) IsNormal 

func (sub *SubJob) IsNormal() bool

IsNormal returns true if the sub-job is normally running.

func (*SubJob) ToProxyJob 

func (sub *SubJob) ToProxyJob(parentJob *Job) Job

ToProxyJob converts a sub-job to a proxy job.

type TTLInfo 

type TTLInfo struct {
	ColumnName      CIStr  `json:"column"`
	IntervalExprStr string `json:"interval_expr"`
	// `IntervalTimeUnit` is actually ast.TimeUnitType. Use `int` to avoid cycle dependency
	IntervalTimeUnit int  `json:"interval_time_unit"`
	Enable           bool `json:"enable"`
}

TTLInfo records the TTL config

func (*TTLInfo) Clone 

func (t *TTLInfo) Clone() *TTLInfo

Clone clones TTLInfo

type TableCacheStatusType 

type TableCacheStatusType int

TableCacheStatusType is the type of the table cache status 

const (
	TableCacheStatusDisable TableCacheStatusType = iota
	TableCacheStatusEnable
	TableCacheStatusSwitching
)

func (TableCacheStatusType) String 

func (t TableCacheStatusType) String() string

type TableInfo 

type TableInfo struct {
	ID      int64  `json:"id"`
	Name    CIStr  `json:"name"`
	Charset string `json:"charset"`
	Collate string `json:"collate"`
	// Columns are listed in the order in which they appear in the schema.
	Columns     []*ColumnInfo     `json:"cols"`
	Indices     []*IndexInfo      `json:"index_info"`
	Constraints []*ConstraintInfo `json:"constraint_info"`
	ForeignKeys []*FKInfo         `json:"fk_info"`
	State       SchemaState       `json:"state"`
	// PKIsHandle is true when primary key is a single integer column.
	PKIsHandle bool `json:"pk_is_handle"`
	// IsCommonHandle is true when clustered index feature is
	// enabled and the primary key is not a single integer column.
	IsCommonHandle bool `json:"is_common_handle"`
	// CommonHandleVersion is the version of the clustered index.
	// 0 for the clustered index created == 5.0.0 RC.
	// 1 for the clustered index created > 5.0.0 RC.
	CommonHandleVersion uint16 `json:"common_handle_version"`

	Comment   string `json:"comment"`
	AutoIncID int64  `json:"auto_inc_id"`

	// Only used by BR when:
	// 1. SepAutoInc() is true
	// 2. The table is nonclustered and has auto_increment column.
	// In that case, both auto_increment_id and tidb_rowid need to be backup & recover.
	// See also https://github.com/wuhuizuo/tidb6/issues/46093
	//
	// It should have been named TiDBRowID, but for historial reasons, we do not use separate meta key for _tidb_rowid and auto_increment_id,
	// and field `AutoIncID` is used to serve both _tidb_rowid and auto_increment_id.
	// If we introduce a TiDBRowID here, it could make furthur misunderstanding:
	//	in most cases, AutoIncID is _tidb_rowid and TiDBRowID is null
	//      but in some cases, AutoIncID is auto_increment_id and TiDBRowID is _tidb_rowid
	// So let's just use another name AutoIncIDExtra to avoid misconception.
	AutoIncIDExtra int64 `json:"auto_inc_id_extra,omitempty"`

	AutoIdCache     int64 `json:"auto_id_cache"` //nolint:revive
	AutoRandID      int64 `json:"auto_rand_id"`
	MaxColumnID     int64 `json:"max_col_id"`
	MaxIndexID      int64 `json:"max_idx_id"`
	MaxForeignKeyID int64 `json:"max_fk_id"`
	MaxConstraintID int64 `json:"max_cst_id"`
	// UpdateTS is used to record the timestamp of updating the table's schema information.
	// These changing schema operations don't include 'truncate table' and 'rename table'.
	UpdateTS uint64 `json:"update_timestamp"`
	// OldSchemaID :
	// Because auto increment ID has schemaID as prefix,
	// We need to save original schemaID to keep autoID unchanged
	// while renaming a table from one database to another.
	// TODO: Remove it.
	// Now it only uses for compatibility with the old version that already uses this field.
	OldSchemaID int64 `json:"old_schema_id,omitempty"`

	// ShardRowIDBits specify if the implicit row ID is sharded.
	ShardRowIDBits uint64
	// MaxShardRowIDBits uses to record the max ShardRowIDBits be used so far.
	MaxShardRowIDBits uint64 `json:"max_shard_row_id_bits"`
	// AutoRandomBits is used to set the bit number to shard automatically when PKIsHandle.
	AutoRandomBits uint64 `json:"auto_random_bits"`
	// AutoRandomRangeBits represents the bit number of the int primary key that will be used by TiDB.
	AutoRandomRangeBits uint64 `json:"auto_random_range_bits"`
	// PreSplitRegions specify the pre-split region when create table.
	// The pre-split region num is 2^(PreSplitRegions-1).
	// And the PreSplitRegions should less than or equal to ShardRowIDBits.
	PreSplitRegions uint64 `json:"pre_split_regions"`

	Partition *PartitionInfo `json:"partition"`

	Compression string `json:"compression"`

	View *ViewInfo `json:"view"`

	Sequence *SequenceInfo `json:"sequence"`

	// Lock represent the table lock info.
	Lock *TableLockInfo `json:"Lock"`

	// Version means the version of the table info.
	Version uint16 `json:"version"`

	// TiFlashReplica means the TiFlash replica info.
	TiFlashReplica *TiFlashReplicaInfo `json:"tiflash_replica"`

	// IsColumnar means the table is column-oriented.
	// It's true when the engine of the table is TiFlash only.
	IsColumnar bool `json:"is_columnar"`

	TempTableType        `json:"temp_table_type"`
	TableCacheStatusType `json:"cache_table_status"`
	PlacementPolicyRef   *PolicyRefInfo `json:"policy_ref_info"`

	// StatsOptions is used when do analyze/auto-analyze for each table
	StatsOptions *StatsOptions `json:"stats_options"`

	ExchangePartitionInfo *ExchangePartitionInfo `json:"exchange_partition_info"`

	TTLInfo *TTLInfo `json:"ttl_info"`
}

TableInfo provides meta data describing a DB table.

func (*TableInfo) ClearPlacement 

func (t *TableInfo) ClearPlacement()

ClearPlacement clears all table and partitions' placement settings

func (*TableInfo) Clone 

func (t *TableInfo) Clone() *TableInfo

Clone clones TableInfo.

func (*TableInfo) Cols 

func (t *TableInfo) Cols() []*ColumnInfo

Cols returns the columns of the table in public state.

func (*TableInfo) ColumnIsInIndex 

func (t *TableInfo) ColumnIsInIndex(c *ColumnInfo) bool

ColumnIsInIndex checks whether c is included in any indices of t.

func (*TableInfo) ContainsAutoRandomBits 

func (t *TableInfo) ContainsAutoRandomBits() bool

ContainsAutoRandomBits indicates whether a table contains auto_random column.

func (*TableInfo) FindColumnNameByID 

func (t *TableInfo) FindColumnNameByID(id int64) string

FindColumnNameByID finds column name by id.

func (*TableInfo) FindConstraintInfoByName 

func (t *TableInfo) FindConstraintInfoByName(constrName string) *ConstraintInfo

FindConstraintInfoByName finds constraintInfo by name.

func (*TableInfo) FindIndexByName 

func (t *TableInfo) FindIndexByName(idxName string) *IndexInfo

FindIndexByName finds index by name.

func (*TableInfo) FindIndexNameByID 

func (t *TableInfo) FindIndexNameByID(id int64) string

FindIndexNameByID finds index name by id.

func (*TableInfo) FindPublicColumnByName 

func (t *TableInfo) FindPublicColumnByName(colNameL string) *ColumnInfo

FindPublicColumnByName finds the public column by name.

func (*TableInfo) GetAutoIncrementColInfo 

func (t *TableInfo) GetAutoIncrementColInfo() *ColumnInfo

GetAutoIncrementColInfo gets the ColumnInfo of auto_increment column if exists.

func (*TableInfo) GetDBID 

func (t *TableInfo) GetDBID(dbID int64) int64

GetDBID returns the schema ID that is used to create an allocator. TODO: Remove it after removing OldSchemaID.

func (*TableInfo) GetPartitionInfo 

func (t *TableInfo) GetPartitionInfo() *PartitionInfo

GetPartitionInfo returns the partition information.

func (*TableInfo) GetPkColInfo 

func (t *TableInfo) GetPkColInfo() *ColumnInfo

GetPkColInfo gets the ColumnInfo of pk if exists. Make sure PkIsHandle checked before call this method.

func (*TableInfo) GetPkName 

func (t *TableInfo) GetPkName() CIStr

GetPkName will return the pk name if pk exists.

func (*TableInfo) GetPrimaryKey 

func (t *TableInfo) GetPrimaryKey() *IndexInfo

GetPrimaryKey extract the primary key in a table and return `IndexInfo` The returned primary key could be explicit or implicit. If there is no explicit primary key in table, the first UNIQUE INDEX on NOT NULL columns will be the implicit primary key. For more information about implicit primary key, see https://dev.mysql.com/doc/refman/8.0/en/invisible-indexes.html

func (*TableInfo) GetUpdateTime 

func (t *TableInfo) GetUpdateTime() time.Time

GetUpdateTime gets the table's updating time.

func (*TableInfo) HasClusteredIndex 

func (t *TableInfo) HasClusteredIndex() bool

HasClusteredIndex checks whether the table has a clustered index.

func (*TableInfo) IsAutoIncColUnsigned 

func (t *TableInfo) IsAutoIncColUnsigned() bool

IsAutoIncColUnsigned checks whether the auto increment column is unsigned.

func (*TableInfo) IsAutoRandomBitColUnsigned 

func (t *TableInfo) IsAutoRandomBitColUnsigned() bool

IsAutoRandomBitColUnsigned indicates whether the auto_random column is unsigned. Make sure the table contains auto_random before calling this method.

func (*TableInfo) IsBaseTable 

func (t *TableInfo) IsBaseTable() bool

IsBaseTable checks to see the table is neither a view or a sequence.

func (*TableInfo) IsLocked 

func (t *TableInfo) IsLocked() bool

IsLocked checks whether the table was locked.

func (*TableInfo) IsSequence 

func (t *TableInfo) IsSequence() bool

IsSequence checks if TableInfo is a sequence.

func (*TableInfo) IsView 

func (t *TableInfo) IsView() bool

IsView checks if TableInfo is a view.

func (*TableInfo) MoveColumnInfo 

func (t *TableInfo) MoveColumnInfo(from, to int)

MoveColumnInfo moves a column to another offset. It maintains the offsets of all affects columns and index columns,

func (*TableInfo) SepAutoInc 

func (t *TableInfo) SepAutoInc() bool

SepAutoInc decides whether _rowid and auto_increment id use separate allocator.

type TableItemID 

type TableItemID struct {
	TableID int64
	ID      int64
	IsIndex bool
}

TableItemID is composed by table ID and column/index ID

type TableLockInfo 

type TableLockInfo struct {
	Tp TableLockType
	// Use array because there may be multiple sessions holding the same read lock.
	Sessions []SessionInfo
	State    TableLockState
	// TS is used to record the timestamp this table lock been locked.
	TS uint64
}

TableLockInfo provides meta data describing a table lock.

type TableLockState 

type TableLockState byte

TableLockState is the state for table lock. 

const (
	// TableLockStateNone means this table lock is absent.
	TableLockStateNone TableLockState = iota
	// TableLockStatePreLock means this table lock is pre-lock state. Other session doesn't hold this lock should't do corresponding operation according to the lock type.
	TableLockStatePreLock
	// TableLockStatePublic means this table lock is public state.
	TableLockStatePublic
)

func (TableLockState) String 

func (t TableLockState) String() string

String implements fmt.Stringer interface.

type TableLockTpInfo 

type TableLockTpInfo struct {
	SchemaID int64
	TableID  int64
	Tp       TableLockType
}

TableLockTpInfo is composed by schema ID, table ID and table lock type.

type TableLockType 

type TableLockType byte

TableLockType is the type of the table lock. 

const (
	// TableLockNone means this table lock is absent.
	TableLockNone TableLockType = iota
	// TableLockRead means the session with this lock can read the table (but not write it).
	// Multiple sessions can acquire a READ lock for the table at the same time.
	// Other sessions can read the table without explicitly acquiring a READ lock.
	TableLockRead
	// TableLockReadLocal is not supported.
	TableLockReadLocal
	// TableLockReadOnly is used to set a table into read-only status,
	// when the session exits, it will not release its lock automatically.
	TableLockReadOnly
	// TableLockWrite means only the session with this lock has write/read permission.
	// Only the session that holds the lock can access the table. No other session can access it until the lock is released.
	TableLockWrite
	// TableLockWriteLocal means the session with this lock has write/read permission, and the other session still has read permission.
	TableLockWriteLocal
)

func (TableLockType) String 

func (t TableLockType) String() string

type TempTableType 

type TempTableType byte

TempTableType is the type of the temp table 

const (
	TempTableNone TempTableType = iota
	TempTableGlobal
	TempTableLocal
)

func (TempTableType) String 

func (t TempTableType) String() string

type TiFlashReplicaInfo 

type TiFlashReplicaInfo struct {
	Count                 uint64
	LocationLabels        []string
	Available             bool
	AvailablePartitionIDs []int64
}

TiFlashReplicaInfo means the flash replica info.

func (*TiFlashReplicaInfo) IsPartitionAvailable 

func (tr *TiFlashReplicaInfo) IsPartitionAvailable(pid int64) bool

IsPartitionAvailable checks whether the partition table replica was available.

type TimeZoneLocation 

type TimeZoneLocation struct {
	Name   string `json:"name"`
	Offset int    `json:"offset"` // seconds east of UTC
	// contains filtered or unexported fields
}

TimeZoneLocation represents a single time zone.

func (*TimeZoneLocation) GetLocation 

func (tz *TimeZoneLocation) GetLocation() (*time.Location, error)

GetLocation gets the timezone location.

type ViewAlgorithm 

type ViewAlgorithm int

ViewAlgorithm is VIEW's SQL ALGORITHM characteristic. See https://dev.mysql.com/doc/refman/5.7/en/view-algorithms.html 

const (
	AlgorithmUndefined ViewAlgorithm = iota
	AlgorithmMerge
	AlgorithmTemptable
)

func (*ViewAlgorithm) String 

func (v *ViewAlgorithm) String() string

type ViewCheckOption 

type ViewCheckOption int

ViewCheckOption is VIEW's WITH CHECK OPTION clause part. See https://dev.mysql.com/doc/refman/5.7/en/view-check-option.html 

const (
	CheckOptionLocal ViewCheckOption = iota
	CheckOptionCascaded
)

func (*ViewCheckOption) String 

func (v *ViewCheckOption) String() string

type ViewInfo 

type ViewInfo struct {
	Algorithm   ViewAlgorithm      `json:"view_algorithm"`
	Definer     *auth.UserIdentity `json:"view_definer"`
	Security    ViewSecurity       `json:"view_security"`
	SelectStmt  string             `json:"view_select"`
	CheckOption ViewCheckOption    `json:"view_checkoption"`
	Cols        []CIStr            `json:"view_cols"`
}

ViewInfo provides meta data describing a DB view.

type ViewSecurity 

type ViewSecurity int

ViewSecurity is VIEW's SQL SECURITY characteristic. See https://dev.mysql.com/doc/refman/5.7/en/create-view.html 

const (
	SecurityDefiner ViewSecurity = iota
	SecurityInvoker
)

func (*ViewSecurity) String 

func (v *ViewSecurity) String() string

type WindowRepeatType 

type WindowRepeatType byte

WindowRepeatType is the type of the window repeat. 

const (
	Never WindowRepeatType = iota
	Day
	Week
	Month
)

func (WindowRepeatType) String 

func (s WindowRepeatType) String() string

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