The Information Schema views are generated automatically when you, as DBA, run the following DB–Access command:
dbaccess database-name $INFORMIXDIR/etc/xpg4_is.sql
The views display data from the system catalog tables. If tables, views, or routines exist with any of the same names as the Information Schema views, you must either rename those database objects or rename the views in the script before you can install the views. You can drop the views with the DROP VIEW statement on each view. To re-create the views, rerun the script.