The following bug has been logged online:
Bug reference: 5293
Logged by: Richard Neill
Email address: rn...@cam.ac.uk
PostgreSQL version: 8.4.2
Operating system: Linux
Description:constant function (date_trunc) is repeatedly evaluated
inside loop
Details:
SUMMARY
Richard Neill rn...@cam.ac.uk wrote:
date_trunc('day', timestamp '2010-01-20 10:16:55')
What happens with a timestamp with time zone literal?
-Kevin
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Richard Neill rn...@cam.ac.uk wrote:
#fast
WHERE column '2010-010-20 00:00:00'
#fast
WHERE column date_trunc('day', timestamp with time zone
'2010-01-20 10:16:55')
#slow
WHERE column date_trunc('day', timestamp
Kevin Grittner wrote:
Richard Neill rn...@cam.ac.uk wrote:
date_trunc('day', timestamp '2010-01-20 10:16:55')
What happens with a timestamp with time zone literal?
-Kevin
Good call!
This query is fast:
SELECT count(1) FROM tbl_tracker WHERE ((srep_timestamp =
date_trunc('day',
