Single row SELECT

Informix®

With Informix, you must use the system table with a condition on the table id:

SELECT USER FROM systables WHERE tabid=1 

IBM® DB2®

To retrieve a single row with IBM DB2, use the following syntax:
SELECT CURRENT_USER FROM SYSIBM.SYSTABLES WHERE NAME='SYSTABLES'

Solution

Check the BDL sources for "FROM systables WHERE tabid=1" and use dynamic SQL to resolve this problem.

Consider writing a FUNCTION which produces the FROM and WHERE part, depending on the target database type.