DSNXSQSR
This is called to use a RID list to sort the selected rows. A RID sort is much faster than an actual physical sort.
Hints
Check the Db2 accounting detail for RID Pool failures and adjust the size of the RID Pool accordingly.
Reference Sources
IBM Db2 for OS/390, Installation Guide, GC26-8970
IBM Db2 for OS/390, Messages and Codes, GC26-8979
IBM Db2 for OS/390, Application Programming and SQL Guide, SC26-8958
IBM Db2 for OS/390, Administration Guide, SC26-8957