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
}
// TODOļ¼If 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)}
}
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)}
}