Data Type: array of QueryCol

4GL Access: RW

The columns attribute is an array of target list column definitions that contains information from the database such as each column's data type, its value (if selected), and its name.

After the data stream has been opened, had its scope assigned, or had the SetCols method invoked, the Columns attribute should not be assigned to the same attribute of another DataStream object. Instead, use a copy of the attribute that was created with the Duplicate method.