From: | Flipper <flipper(at)gammadue(dot)com> |
---|---|
To: | pgsql-jdbc(at)postgresql(dot)org |
Subject: | Re: prepared statement: are they pre-compiled? |
Date: | 2007-07-05 10:08:59 |
Message-ID: | 200707051208.59443.flipper@gammadue.com |
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Lists: | pgsql-jdbc |
On Thursday 5 July 2007 Heikki Linnakangas's cat, walking on the keyboard,
wrote:
> It depends on the prepareThreshold parameter. The default is 5, which
> means that the query is parsed and planned separately for each call to
> executeQuery, until the 5th call. After that, a generic plan is
> generated and used thereafter.
Thanks for you explaination!
Where is this default parameter set? I cannot find it.
By the way, I cannot see the real difference in the code, and in fact the
QueryExecutor goes into the sendParse with oneShot = false (since the flag
has not been set). The sendParse creates a statement name and then sends the
parse message. So the doubt is: the parse message is always sent and the
server ignores it when a statement name is provided? Or is something in the
Java code that I'm not getting?
Thanks
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