model

Documentation

Index

• type ActionType
  • func (action ActionType) String() string
• type CIStr
  • func NewCIStr(s string) (cs CIStr)
  • func (cis CIStr) String() string
• type ColumnInfo
  • func (c *ColumnInfo) Clone() *ColumnInfo
• type DBInfo
  • func (db *DBInfo) Clone() *DBInfo
• type FKInfo
  • func (fk *FKInfo) Clone() *FKInfo
• type IndexColumn
  • func (i *IndexColumn) Clone() *IndexColumn
• type IndexInfo
  • func (index *IndexInfo) Clone() *IndexInfo
  • func (index *IndexInfo) HasPrefixIndex() bool
• type IndexType
  • func (t IndexType) String() string
• type Job
  • func (job *Job) Decode(b []byte) error
  • func (job *Job) DecodeArgs(args ...interface{}) error
  • func (job *Job) Encode() ([]byte, error)
  • func (job *Job) GetRowCount() int64
  • func (job *Job) IsDone() bool
  • func (job *Job) IsFinished() bool
  • func (job *Job) IsRunning() bool
  • func (job *Job) SetRowCount(count int64)
  • func (job *Job) String() string
• type JobState
  • func (s JobState) String() string
• type Owner
  • func (o *Owner) String() string
• type SchemaDiff
• type SchemaState
  • func (s SchemaState) String() string
• type TableInfo
  • func (t *TableInfo) Clone() *TableInfo

Types

type ActionType

type ActionType byte

ActionType is the type for DDL action.

const (
	ActionNone ActionType = iota
	ActionCreateSchema
	ActionDropSchema
	ActionCreateTable
	ActionDropTable
	ActionAddColumn
	ActionDropColumn
	ActionAddIndex
	ActionDropIndex
	ActionAddForeignKey
	ActionDropForeignKey
	ActionTruncateTable
	ActionModifyColumn
)

List DDL actions.

func (ActionType) String

func (action ActionType) String() 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.

type ColumnInfo

type ColumnInfo struct {
	ID              int64       `json:"id"`
	Name            CIStr       `json:"name"`
	Offset          int         `json:"offset"`
	DefaultValue    interface{} `json:"default"`
	types.FieldType `json:"type"`
	State           SchemaState `json:"state"`
	Comment         string      `json:"comment"`
}

ColumnInfo provides meta data describing of a table column.

func (*ColumnInfo) Clone

func (c *ColumnInfo) Clone() *ColumnInfo

Clone clones ColumnInfo.

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.

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 IndexColumn

type IndexColumn struct {
	Name   CIStr `json:"name"`   // Index name
	Offset int   `json:"offset"` // Index offset
	Length int   `json:"length"` // Index 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 (
	IndexTypeBtree IndexType = iota + 1
	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"`
	State    JobState      `json:"state"`
	Error    *terror.Error `json:"err"`
	// Every time we meet an error when running job, we will increase it.
	ErrorCount int64 `json:"err_count"`
	// The number of rows that are processed.
	RowCount int64         `json:"row_count"`
	Mu       sync.Mutex    `json:"-"`
	Args     []interface{} `json:"-"`
	// We must use json raw message to delay parsing special args.
	RawArgs     json.RawMessage `json:"raw_args"`
	SchemaState SchemaState     `json:"schema_state"`
	// Snapshot version for this job.
	SnapshotVer uint64 `json:"snapshot_ver"`
	// unix nano seconds
	// TODO: Use timestamp allocated by TSO.
	LastUpdateTS int64 `json:"last_update_ts"`
	// Query string of the ddl job.
	Query string `json:"query"`
}

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() ([]byte, error)

Encode encodes job with json format.

func (*Job) GetRowCount

func (job *Job) GetRowCount() int64

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

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) IsRunning

func (job *Job) IsRunning() bool

IsRunning returns whether job is still running or not.

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 (
	JobNone JobState = iota
	JobRunning
	// When DDL encouterred an unrecoverable error at reorganization state,
	// some keys has been added already, we need to remove them.
	// JobRollback is the state to do rollback work.
	JobRollback
	JobRollbackDone
	JobDone
	JobCancelled
)

List job states.

func (JobState) String

func (s JobState) String() string

String implements fmt.Stringer interface.

type Owner

type Owner struct {
	OwnerID string `json:"owner_id"`
	// unix nano seconds
	// TODO: Use timestamp allocated by TSO.
	LastUpdateTS int64 `json:"last_update_ts"`
}

Owner is for DDL Owner.

func (*Owner) String

func (o *Owner) 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"`
}

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-organizating whole data after write only state.
	StateWriteReorganization
	// StateDeleteReorganization means we are re-organizating 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 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"`
}

TableInfo provides meta data describing a DB table.

func (*TableInfo) Clone

func (t *TableInfo) Clone() *TableInfo

Clone clones TableInfo.