Andrew Sullivan wrote:
On Wed, Jan 17, 2007 at 01:52:25PM +0100, Marcin St?pnicki wrote:
I see this in postgresql logs:

[6210]   DEBUG:  query: select * from "zew_patients"
[6210]   DEBUG:  query:  SELECT "A1"."p_nr_pesel" FROM "zew_patients"
"A1" WHERE ("A1"."p_patient_id" = 19300)

The point is, I don't why oh why the first select is issued (some cache?),

<speculation level="rank">

I bet it's getting the column list from the table or some such thing. This is a lousy way to do it (the information_schema would be more
correct, although maybe no faster).

That'd be my guess. And then it's not fetching any rows, expecting cursor-like behaviour. Of course we fetch all the rows before returning any results.

The real solution would be to add "LIMIT 0" or "LIMIT 1" to the column-finding query, but I doubt that's possible with the Oracle plugin.

Perhaps check if there's a "fetch N rows at a time" option for the ODBC setup that might help you.

--
  Richard Huxton
  Archonet Ltd

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