Re: Tricks with DBI

Great article - however: And, for the same reasons, you should use prepare_cached instead of prepare.

Don't use prepare_cached() with DBD::Sybase - this would open multiple connections to your server (one for each cached statement handle). If you have a need to have a few requests that you are going to call a *lot* you may want to create stored procedures for them instead.

Michael

Comment on Re: Tricks with DBI

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Re^2: Tricks with DBI by thor (Priest) on Sep 19, 2004 at 04:02 UTC
I was just curious: is this still true? Here we are four years later. Just wondering if any progress has been made on this front... thor `Feel the white light, the light within Be your own disciple, fan the sparks of will For all of us waiting, your kingdom will come`	[reply]
Re^3: Tricks with DBI by mpeppler (Vicar) on Sep 20, 2004 at 06:31 UTC
I have to admit that I haven't really tested prepare_cached with DBD::Sybase. I suspect that in certain situations this might still open multiple connections, primarily if DBD::Sybase doesn't realize that a particular query is "finished" before running another one. If I have the time I'll run a few tests to see what the deal is - and maybe add an override for prepare_cached in DBD::Sybase to avoid any bad surprises. Update: After thinking about this a little more, I want to add that with Sybase prepare_cached is really only useful for statements that include placeholders. Any other statement won't really get cached anyway, and doesn't actually get parsed/compiled/optimized until you call DBI's execute(). Michael	[reply]
Re^4: Tricks with DBI by Anonymous Monk on Dec 24, 2005 at 16:46 UTC
I'm using Class::DBI in conjunction with Class::DBI::Sybase. When using these modules they default to using prepare_cached for every query, and there is not an easy way to make them NOT to cache. I got it to work but by changing the Class::DBI code, which isn't good... Is there a way to force no caching, perhaps in a connection attribute?	[reply]
Re^5: Tricks with DBI by mpeppler (Vicar) on Dec 25, 2005 at 09:05 UTC
Re^6: Tricks with DBI by victor73 (Initiate) on Dec 26, 2005 at 08:54 UTC
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