| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
| Cc: | Jeremy Drake <pgsql(at)jdrake(dot)com>, PostgreSQL Patches <pgsql-patches(at)postgresql(dot)org>, Neil Conway <neilc(at)samurai(dot)com>, David Fetter <david(at)fetter(dot)org> |
| Subject: | Re: patch adding new regexp functions |
| Date: | 2007-02-15 15:34:23 |
| Message-ID: | 24844.1171553663@sss.pgh.pa.us |
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| Lists: | pgsql-hackers pgsql-patches |
Peter Eisentraut <peter_e(at)gmx(dot)net> writes:
> Jeremy Drake wrote:
>> # My experience with the array code leads me to believe that building
>> up an array is an expensive proposition. I know I could code it
>> smarter so that the array is only constructed in the end.
> You can make any code arbitrarily fast if it doesn't have to give the
> right answer.
Even more to the point, it's folly to suppose that the overhead of
processing a SETOF result is less than that of array construction.
I tend to agree with Peter's concern that returning a set is going to
make it hard to track which result is which.
regards, tom lane
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