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Re: Is This A Set Based Solution?

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Bruno Wolff III schrieb:
On Mon, Mar 12, 2007 at 11:15:01 -0700,
  Stefan Berglund <sorry.no.koolaid@xxxxxx> wrote:
I have an app where the user makes multiple selections from a list.  I
can either construct a huge WHERE clause such as SELECT blah blah FROM
foo WHERE (ID = 53016 OR ID = 27 OR ID = 292 OR ID = 512) or I could
alternatively pass the string of IDs ('53016,27,292,512') to a table
returning function which TABLE is then JOINed with the table I wish to
query instead of using the unwieldy WHERE clause.  The latter strikes me
as a far more scalable method since it eliminates having to use dynamic
SQL to construct the ridiculously long WHERE clause which will no doubt
ultimately bump up against parser length restrictions or some such.

How big is huge?
If the list of IDs is in the 1000s or higher, then it may be better to
load the data into a temp table and ANALYSE it before running your query.
Otherwise, for smaller lists the IN suggestion should work well in recent
versions.

Show me a user which really clicks on 1000 or more checkboxes on a
webpage or similar ;)
I'd think around 20 values is plenty.

Regards
Tino


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