column

Documentation

Index

• Constants
• func CastValues(ctx context.Context, rec []types.Datum, cols []*Col) (err error)
• func CheckNotNull(cols []*Col, row []types.Datum) error
• func CheckOnce(cols []*Col) error
• func ColDescFieldNames(full bool) []string
• type Col
  • func FindCol(cols []*Col, name string) *Col
  • func FindCols(cols []*Col, names []string) ([]*Col, error)
  • func FindOnUpdateCols(cols []*Col) []*Col
  • func (c *Col) CheckNotNull(data types.Datum) error
  • func (c *Col) GetTypeDesc() string
  • func (c *Col) IsPKHandleColumn(tbInfo *model.TableInfo) bool
  • func (c *Col) String() string
• type ColDesc
  • func NewColDesc(col *Col) *ColDesc
• type IndexedCol
  • func (idx *IndexedCol) FetchValues(r []types.Datum) ([]types.Datum, error)

Constants

const PrimaryKeyName = "PRIMARY"

PrimaryKeyName defines primary key name.

Functions

func CastValues

func CastValues(ctx context.Context, rec []types.Datum, cols []*Col) (err error)

CastValues casts values based on columns type.

func CheckNotNull

func CheckNotNull(cols []*Col, row []types.Datum) error

CheckNotNull checks if row has nil value set to a column with NotNull flag set.

func CheckOnce

func CheckOnce(cols []*Col) error

CheckOnce checks if there are duplicated column names in cols.

func ColDescFieldNames

func ColDescFieldNames(full bool) []string

ColDescFieldNames returns the fields name in result set for desc and show columns.

Types

type Col

type Col struct {
	model.ColumnInfo
}

Col provides meta data describing a table column.

func FindCol

func FindCol(cols []*Col, name string) *Col

FindCol finds column in cols by name.

func FindCols

func FindCols(cols []*Col, names []string) ([]*Col, error)

FindCols finds columns in cols by names.

func FindOnUpdateCols

func FindOnUpdateCols(cols []*Col) []*Col

FindOnUpdateCols finds columns which have OnUpdateNow flag.

func (*Col) CheckNotNull

func (c *Col) CheckNotNull(data types.Datum) error

CheckNotNull checks if nil value set to a column with NotNull flag is set.

func (*Col) GetTypeDesc

func (c *Col) GetTypeDesc() string

GetTypeDesc gets the description for column type.

func (*Col) IsPKHandleColumn

func (c *Col) IsPKHandleColumn(tbInfo *model.TableInfo) bool

IsPKHandleColumn checks if the column is primary key handle column.

func (*Col) String

func (c *Col) String() string

String implements fmt.Stringer interface.

type ColDesc

type ColDesc struct {
	Field        string
	Type         string
	Collation    string
	Null         string
	Key          string
	DefaultValue interface{}
	Extra        string
	Privileges   string
	Comment      string
}

ColDesc describes column information like MySQL desc and show columns do.

func NewColDesc

func NewColDesc(col *Col) *ColDesc

NewColDesc returns a new ColDesc for a column.

type IndexedCol

type IndexedCol struct {
	model.IndexInfo
	X kv.Index
}

IndexedCol defines an index with info.

func (*IndexedCol) FetchValues

func (idx *IndexedCol) FetchValues(r []types.Datum) ([]types.Datum, error)

FetchValues fetches indexed values from a row.