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* performance difference in count(1) vs. count(*)?
@ 2002-07-28 15:50 Markus Bertheau <twanger@bluetwanger.de>
0 siblings, 1 reply; 2+ messages in thread
From: Markus Bertheau @ 2002-07-28 15:50 UTC (permalink / raw)
To: pgsql-sql
Hello,
is there a difference performance-wise between select count(1) and
select count(*)?
--
Markus Bertheau.
Berlin, Berlin.
Germany.
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: performance difference in count(1) vs. count(*)?
@ 2002-07-28 17:02 Tom Lane <tgl@sss.pgh.pa.us>
parent: Markus Bertheau <twanger@bluetwanger.de>
0 siblings, 0 replies; 2+ messages in thread
From: Tom Lane @ 2002-07-28 17:02 UTC (permalink / raw)
To: Markus Bertheau <twanger@bluetwanger.de>; +Cc: pgsql-sql
Markus Bertheau <twanger@bluetwanger.de> writes:
> is there a difference performance-wise between select count(1) and
> select count(*)?
Nope. In fact, the latter is converted to the former during parsing.
regards, tom lane
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2002-07-28 15:50 performance difference in count(1) vs. count(*)? Markus Bertheau <twanger@bluetwanger.de>
2002-07-28 17:02 ` Tom Lane <tgl@sss.pgh.pa.us>
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