Re: What does this error mean? - Mailing list pgsql-general

From Tom Allison
Subject Re: What does this error mean?
Date
Msg-id 83BE5531-C1F2-4656-A21F-4321F950E838@tacocat.net
Whole thread Raw
In response to Re: What does this error mean?  (Tom Allison <tom@tacocat.net>)
List pgsql-general
never mind.  first query after a restart is slow...

On May 23, 2007, at 10:14 PM, Tom Allison wrote:

I noticed that the option for 'E' is not enabled in 8.2 by default (  standard_conforming_strings (boolean)  ).
I turned this on and the SQL statements went from 0.5 sec to 3.8 sec each.
Is this expected?

On May 23, 2007, at 8:00 PM, SCassidy@overlandstorage.com wrote:


Hi,

If you have a statement using placeholders like:

     select id from info where device_type = ? and drive_mfg = ?

and then prepare and execute it, something like:
       $sth=$dbh->prepare($stmt) ||  errexit("bad prepare for stmt $stmt, error: $DBI::errstr");
       $rc=$sth->execute('TYPE1','ACME') ||  errexit("can't execute statement:\n$stmt\nreturn code $rc: DB error: $DBI::errstr");

If the prepare thinks that the placeholders are of mixed types (as supported by the driver),  like:

select id from info where device_type = ? and drive_mfg = :2

Then, you will get the type of message you saw.

Probably your query is being built by the program where some odd character is occasionally creeping in where you don't expect it.  I assume that the html entity references ('&quot;') are not actually in the error message.  


Susan Cassidy



Tom Allison <tom@tacocat.net>
Sent by: pgsql-general-owner@postgresql.org

05/23/2007 03:59 PM

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General PostgreSQL List <pgsql-general@postgresql.org>
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Subject
[GENERAL] What does this error mean?





Cannot mix placeholder styles &quot;:foo&quot; and &quot;$1&quot; at /
sw/lib/perl5/5.8.6/darwin-thread-multi-2level//DBD/Pg.pm line 174.


I keep finding it from time to time on one script I have and I have  
no clue what it's telling me.

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