column_name
Points to the name of the column which is a null-terminated string.
column_type
Indicates the type of the column. This is one of the Embedded SQL data types such as DT_INT, DT_FIXCHAR, or DT_BINARY. See Embedded SQL data types.
column_width
Defines the maximum width for char(n), varchar(n) and binary(n) declarations and is set to 0 for all other types.
column_index
The ordinal position of the column which starts at 1.
column_can_be_null
Set to 1 if the column is nullable; otherwise it is set to 0.
The following code fragment shows how to set the properties for objects of this type and how to describe the result set to
the calling SQL environment.