Hello all, for a local conference, I am preparing a session for a Firebird beginners' group, to demonstrate the basics of Stored Procedures and their usage from different clients.
One scenario is about transforming a *slightly* complex sql query into a selectable stored proc which will yield the same result. I stumbled over something strange: Query and SP are running with similar same speed on 2.5.7, which I have in production systems. But query is *MUCH* slower than stored proc on different(!) 2.5.3 systems (more rarely used machines, I failed to upgrade so far). 2.5.7. systems: ~ 3 seconds for Query and SP 2.5.3. systems: ~ 3 seconds for SP, 15 minutes(!) for Query always tested from a fresh restored database with starting results normalized to 0,00. It does not look like a difference in the machines' hardware or even the used antivirus or OS can cause this big a difference. Just out of curiosity - because all production systems should be updated to at least 2.5.7 anyway: has there been such an improvement between sub releases? I checked the change logs: https://www.firebirdsql.org/file/documentation/release_notes/Firebird-2.5.8-ReleaseNotes.pdf and checked all between 2.5.3 and 2.5.8, but found nothing that matches this experience. Query is pretty much straigthforward; one nested subquery to update outer stream, no UDF or other built-in functions best regards, André
