Exemple #1
0
func (b *executorBuilder) columnToPBExpr(client kv.Client, column *expression.Column, tbl *model.TableInfo) *tipb.Expr {
	if !client.SupportRequestType(kv.ReqTypeSelect, int64(tipb.ExprType_ColumnRef)) {
		return nil
	}
	switch column.GetType().Tp {
	case mysql.TypeBit, mysql.TypeSet, mysql.TypeEnum, mysql.TypeDecimal, mysql.TypeGeometry,
		mysql.TypeDate, mysql.TypeNewDate, mysql.TypeDatetime, mysql.TypeTimestamp, mysql.TypeYear:
		return nil
	}

	id := int64(-1)
	for _, col := range tbl.Columns {
		if tbl.Name == column.TblName && col.Name == column.ColName {
			id = col.ID
			break
		}
	}
	// Zero Column ID is not a column from table, can not support for now.
	if id == 0 {
		return nil
	}
	// TODO:If the column ID isn't in fields, it means the column is from an outer table,
	// its value is available to use.
	if id == -1 {
		return nil
	}

	return &tipb.Expr{
		Tp:  tipb.ExprType_ColumnRef.Enum(),
		Val: codec.EncodeInt(nil, id)}
}
Exemple #2
0
func (pc pbConverter) columnToPBExpr(column *expression.Column) *tipb.Expr {
	if !pc.client.SupportRequestType(kv.ReqTypeSelect, int64(tipb.ExprType_ColumnRef)) {
		return nil
	}
	switch column.GetType().Tp {
	case mysql.TypeBit, mysql.TypeSet, mysql.TypeEnum, mysql.TypeGeometry, mysql.TypeDecimal:
		return nil
	}

	id := column.ID
	// Zero Column ID is not a column from table, can not support for now.
	if id == 0 || id == -1 {
		return nil
	}

	return &tipb.Expr{
		Tp:  tipb.ExprType_ColumnRef,
		Val: codec.EncodeInt(nil, id)}
}