func dataForColumnsInTable(schema *model.DBInfo, tbl *model.TableInfo) [][]types.Datum {
rows := [][]types.Datum{}
for i, col := range tbl.Columns {
colLen := col.Flen
if colLen == types.UnspecifiedLength {
colLen = mysql.GetDefaultFieldLength(col.Tp)
}
decimal := col.Decimal
if decimal == types.UnspecifiedLength {
decimal = 0
}
columnType := col.FieldType.CompactStr()
columnDesc := table.NewColDesc(&table.Column{ColumnInfo: *col})
var columnDefault interface{}
if columnDesc.DefaultValue != nil {
columnDefault = fmt.Sprintf("%v", columnDesc.DefaultValue)
}
record := types.MakeDatums(
catalogVal, // TABLE_CATALOG
schema.Name.O, // TABLE_SCHEMA
tbl.Name.O, // TABLE_NAME
col.Name.O, // COLUMN_NAME
i+1, // ORIGINAL_POSITION
columnDefault, // COLUMN_DEFAULT
columnDesc.Null, // IS_NULLABLE
types.TypeToStr(col.Tp, col.Charset), // DATA_TYPE
colLen, // CHARACTER_MAXIMUM_LENGTH
colLen, // CHARACTOR_OCTET_LENGTH
decimal, // NUMERIC_PRECISION
0, // NUMERIC_SCALE
0, // DATETIME_PRECISION
col.Charset, // CHARACTER_SET_NAME
col.Collate, // COLLATION_NAME
columnType, // COLUMN_TYPE
columnDesc.Key, // COLUMN_KEY
columnDesc.Extra, // EXTRA
"select,insert,update,references", // PRIVILEGES
"", // COLUMN_COMMENT
)
rows = append(rows, record)
}
return rows
}
func (e *ShowExec) fetchShowColumns() error {
tb, err := e.getTable()
if err != nil {
return errors.Trace(err)
}
cols := tb.Cols()
for _, col := range cols {
if e.Column != nil && e.Column.Name.L != col.Name.L {
continue
}
desc := table.NewColDesc(col)
// The FULL keyword causes the output to include the column collation and comments,
// as well as the privileges you have for each column.
row := &Row{}
if e.Full {
row.Data = types.MakeDatums(
desc.Field,
desc.Type,
desc.Collation,
desc.Null,
desc.Key,
desc.DefaultValue,
desc.Extra,
desc.Privileges,
desc.Comment,
)
} else {
row.Data = types.MakeDatums(
desc.Field,
desc.Type,
desc.Null,
desc.Key,
desc.DefaultValue,
desc.Extra,
)
}
e.rows = append(e.rows, row)
}
return nil
}