model

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 Go to latest Published: Apr 25, 2020 License: Apache-2.0 Imports: 13 Imported by: 0

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Index

Constants

View Source 
const (
	// AddIndexStr is a string related to the operation of "add index".
	AddIndexStr      = "add index"
	AddPrimaryKeyStr = "add primary key"
)
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
)

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)

	// CurrLatestTableInfoVersion means the latest table info in the current TiDB.
	CurrLatestTableInfoVersion = TableInfoVersion3
)
View Source 
const (
	PartitionTypeRange      PartitionType = 1
	PartitionTypeHash                     = 2
	PartitionTypeList                     = 3
	PartitionTypeKey                      = 4
	PartitionTypeSystemTime               = 5
)

Partition types.

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.

Variables

View Source 
var ExtraHandleName = NewCIStr("_tidb_rowid")

ExtraHandleName is the name of ExtraHandle Column.

Functions

func ColumnToProto 

func ColumnToProto(c *ColumnInfo) *tipb.ColumnInfo

ColumnToProto converts model.ColumnInfo to tipb.ColumnInfo.

func ColumnsToProto 

func ColumnsToProto(columns []*ColumnInfo, pkIsHandle bool) []*tipb.ColumnInfo

ColumnsToProto converts a slice of model.ColumnInfo to a slice of tipb.ColumnInfo.

func IndexToProto 

func IndexToProto(t *TableInfo, idx *IndexInfo) *tipb.IndexInfo

IndexToProto converts a model.IndexInfo to a tipb.IndexInfo.

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
	ActionModifyTableAutoIdCache        ActionType = 34
	ActionRebaseAutoRandomBase          ActionType = 35
)

List DDL actions.

func (ActionType) String 

func (action ActionType) String() string

String return current ddl action in string

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) 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/pingcap/tidb/pull/6460/files would be compatible during TiDB upgrading.

type ColumnInfo 

type ColumnInfo struct {
	ID                  int64               `json:"id"`
	Name                CIStr               `json:"name"`
	Offset              int                 `json:"offset"`
	OriginDefaultValue  interface{}         `json:"origin_default"`
	DefaultValue        interface{}         `json:"default"`
	DefaultValueBit     []byte              `json:"default_bit"`
	GeneratedExprString string              `json:"generated_expr_string"`
	GeneratedStored     bool                `json:"generated_stored"`
	Dependences         map[string]struct{} `json:"dependences"`
	types.FieldType     `json:"type"`
	State               SchemaState `json:"state"`
	Comment             string      `json:"comment"`
	// 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 NewExtraHandleColInfo 

func NewExtraHandleColInfo() *ColumnInfo

NewExtraHandleColInfo mocks a column info for extra handle column.

func (*ColumnInfo) Clone 

func (c *ColumnInfo) Clone() *ColumnInfo

Clone clones 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) 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) SetDefaultValue 

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

SetDefaultValue sets the default value.

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"`
}

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"`
}

DDLReorgMeta is meta info of DDL reorganization.

func NewDDLReorgMeta 

func NewDDLReorgMeta() *DDLReorgMeta

NewDDLReorgMeta new a DDLReorgMeta.

type FKInfo 

type FKInfo struct {
	ID       int64       `json:"id"`
	Name     CIStr       `json:"fk_name"`
	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"`
}

FKInfo provides meta data describing a foreign key constraint.

func (*FKInfo) Clone 

func (fk *FKInfo) Clone() *FKInfo

Clone clones FKInfo.

type HistoryInfo 

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

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.

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 (*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.
	Unique  bool           `json:"is_unique"`  // Whether the index is unique.
	Primary bool           `json:"is_primary"` // Whether the index is primary key.
	State   SchemaState    `json:"state"`
	Comment string         `json:"comment"`    // Comment
	Tp      IndexType      `json:"index_type"` // Index type: Btree or Hash
}

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 (*IndexInfo) Clone 

func (index *IndexInfo) Clone() *IndexInfo

Clone clones IndexInfo.

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
)

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"`
	State      JobState      `json:"state"`
	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:"-"`
	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"`
	// 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.
	// This field is depreciated.
	ReorgMeta *DDLReorgMeta `json:"reorg_meta"`

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

Job is for a DDL operation.

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) 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) 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.

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) IsRollbackDone 

func (job *Job) IsRollbackDone() bool

IsRollbackDone returns whether the job is rolled back or not.

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) SetRowCount 

func (job *Job) SetRowCount(count int64)

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

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
)

List job states.

func (JobState) String 

func (s JobState) String() string

String implements fmt.Stringer interface.

type PartitionDefinition 

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

PartitionDefinition defines a single partition.

type PartitionInfo 

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

	// User may already creates 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"`
	Num         uint64                `json:"num"`
}

PartitionInfo provides table partition info.

func (*PartitionInfo) GetNameByID 

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

GetNameByID gets the partition name by ID.

type PartitionType 

type PartitionType int

PartitionType is the type for PartitionInfo

func (PartitionType) String 

func (p PartitionType) String() string

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"`
}

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
)

func (SchemaState) String 

func (s SchemaState) String() string

String implements fmt.Stringer interface.

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 TableColumnID 

type TableColumnID struct {
	TableID  int64
	ColumnID int64
}

TableColumnID is composed by table ID and column ID.

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"`
	ForeignKeys []*FKInfo     `json:"fk_info"`
	State       SchemaState   `json:"state"`
	PKIsHandle  bool          `json:"pk_is_handle"`
	Comment     string        `json:"comment"`
	AutoIncID   int64         `json:"auto_inc_id"`
	AutoIdCache int64         `json:"auto_id_cache"`
	AutoRandID  int64         `json:"auto_rand_id"`
	MaxColumnID int64         `json:"max_col_id"`
	MaxIndexID  int64         `json:"max_idx_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"`
	// 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"`
	// 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"`
}

TableInfo provides meta data describing a DB table.

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) FindIndexByName 

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

FindIndexByName finds index by name.

func (*TableInfo) GetAutoIncrementColInfo 

func (t *TableInfo) GetAutoIncrementColInfo() *ColumnInfo

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) GetUpdateTime 

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

GetUpdateTime gets the table's updating time.

func (*TableInfo) IsAutoIncColUnsigned 

func (t *TableInfo) IsAutoIncColUnsigned() bool

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) IsLocked 

func (t *TableInfo) IsLocked() bool

IsLocked checks whether the table was locked.

func (*TableInfo) IsView 

func (t *TableInfo) IsView() bool

IsView checks if tableinfo is a view

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 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
	// 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 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 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

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