title: Performance issues in Sybase 12.5 to Sybase 15 migration
body: <p>We are in the process of migrating our DB to Sybase 15. The stored procedures which were working fine in Sybase 12.5 have a poor performance in Sybase 15. However when we add 'set merge_join off' Syabse 15 performs faster. Is there any way to use the sybase 12.5 stored procs as it is in Sybase 15 / or with minimal changes? Do we have any alternate ways apart from rewriting the whole stored proc?</p>