Schwarz, Karl wrote:
I am having a performance problem with a query implemented within a
server side function. If I use an SQL client(EMS Postgres) and manually
generate the sql query I get about 100 times performance improvement
over using the function.
I've also tried using a prepared statement from my application and
observed a similar performance improvement over the the function.
The table I am quering against has several hundred thousand records. I
have indexes defined and I've run vacuum several times.
Is there something basic I am missing here with the use of a function. I
am no database expert, but my assumption was that a function would give
me better results than in-line sql.
I've seen a mailing list entry in another list that implied that the
query planner for a function behaves differently than in-line sql.
For starters, can you show us the function, the manual sql query and the
schema, please?
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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