| From: | Kris Jurka <books(at)ejurka(dot)com> |
|---|---|
| To: | Jie Liang <jie(at)stbernard(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-sql(at)postgresql(dot)org, pgsql-jdbc(at)postgresql(dot)org |
| Subject: | Re: Prepare Statement |
| Date: | 2004-06-17 18:59:28 |
| Message-ID: | Pine.BSO.4.56.0406171356320.14006@leary.csoft.net |
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| Thread: | |
| Lists: | pgsql-jdbc pgsql-sql |
On Thu, 17 Jun 2004, Jie Liang wrote:
> Kirs,
>
> I re-compile with setUseServerPrepare(true), it works fine, thanks.
> However, reading from my log file, what I saw is that five same SELECTs
> with different argument, so I am wondering that the PrepareStatement
> really save time than individualy execute five SELECTs ???
>
This is what I see in the log file:
2004-06-17 11:55:35 [23254] LOG: statement: PREPARE JDBC_STATEMENT_1(integer) AS SELECT $1 ; EXECUTE JDBC_STATEMENT_1(1)
2004-06-17 11:55:35 [23254] LOG: statement: EXECUTE JDBC_STATEMENT_1(2)
2004-06-17 11:55:35 [23254] LOG: statement: EXECUTE JDBC_STATEMENT_1(3)
2004-06-17 11:55:35 [23254] LOG: statement: EXECUTE JDBC_STATEMENT_1(4)
2004-06-17 11:55:35 [23254] LOG: statement: EXECUTE JDBC_STATEMENT_1(5)
2004-06-17 11:55:35 [23254] LOG: statement: DEALLOCATE JDBC_STATEMENT_1
I don't know why this would be different for you. What exact version of
the server and driver are you using?
Kris Jurka
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