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Re: perl & SQL best practices

by nikosv (Chaplain)
on Apr 28, 2012 at 14:40 UTC ( #967815=note: print w/replies, xml ) Need Help??

in reply to perl & SQL best practices

Think of the stored procedure as a module that encapsulates code into one piece and exposes a public interface.That way when the underlying implementation changes you don't have to change the interface too.With ad-hoc sql you have no such advandage.

Furthermore a stored proc is compiled server side and can be executed faster because of caching. Another advadnage is that you can write triggers that call the procedure when an DB event happens.

The security wise advandage it that you grant access for executing the procedure but you don't have to give access/grant to the underlying tables;you have to sanitize input though.One limitation is that not all DBI/DBD drivers can bind parameters to procedures.

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[choroba]: but undef %hash and %hash = () both work, too, but the first one keeps the memory allocated, while the latter makes it available for other parts of the program.
[choroba]: iirc
[perldigious]: karlgoethebier: Well it is a pretty old and complicated (for me) bit of code I wrote (poorly by my current standards), so I'm expecting everything to break when I add the scoping and find out what else is undesireably scope changed. :-)
[perldigious]: Ah, thanks choroba, that sort of thing was precisely what I was wondering when I asked.
[perldigious]: I didn't want to tie up memory unecessarily basically, I wanted to "delete" it specifically to free it up, and wasn't sure I was even accomplishing that.
[stevieb]: perldigious You should start by writing some unit tests. That'll ensure current functionality doesn't break with changes.

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