On Tue, May 16, 2006 at 04:36:36PM +0530, Gurjeet Singh wrote: > If a big JOIN query takes N minutes on MS SQL Server, and I wish > to see the plan why it is taking that long, one would expect me to > enable 'Show Execution Plan' in the SQL Query Analyzer (similar to > PG's EXPLAIN ANALYZE). And when I do that, the query now takes more > than 2*N minutes to come back. I assume this extra delay is caused by > the overhead of extra processing it does at row-source level (like how > many rows passed through this row-source, average row-size, etc.).
I posted a patch last week on -patches which should dramatically cut the overhead of EXPLAIN ANALYZE. Perhaps you could try that and report your experience. http://archives.postgresql.org/pgsql-patches/2006-05/msg00158.php BTW, just showing the plan takes no time at all, just use EXPLAIN without the ANALYZE. Have a nice day, -- Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/ > From each according to his ability. To each according to his ability to > litigate.
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