Performance problems with bind variables

From: Carlos Netto <Carlos.Netto_at_ibase.org.br>
Date: Thu, 13 Oct 94 22:21:00 -0300
Message-ID: <2aa.502.846%mpcbbs_at_ibase.org.br>

Hi,

My customer has a report (using ReportWriter) that takes 50 seconds to run. While tunning the SQL statement (explain, etc.), I moved the query to SQL*Plus and replaced all bind variables with constants. Surprise: the same query now takes 10 seconds to run!

After, I move back to ReportWriter and replace the parameters with constants. ReportWriter also takes 10 seconds to run!

O look at the tkprof output for all executions. The execution plans are identical, but timings are different.

The question: is it a Oracle bug? can I get a patch? Local Oracle give us no answer yet!

Thanks a lot,

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| Carlos Augusto Leite Netto | Voice : +55.192.51.1153 |
| Software Design Informatica | Fax : +55.192.54.6518 |
| Oracle VAR | e-mail : carlos.netto%mpcbbs_at_ibase.org.br |
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Received on Fri Oct 14 1994 - 02:21:00 CET