It's stated in the docs that date_trunc is "conceptually similar to the
trunc function for numbers.".
So, trunc(1.1) = 1, trunc(1.9) = 1, and so on.
But, date_trunc behaves like round function: round(1.9) = 2.
Example:
idel=# select date_trunc('milliseconds', '2009-01-01
12:15:00.000999+02'::timestamp with time zone);
date_trunc
----------------------------
2009-01-01 11:15:00.001+01
(1 row)
fidel=# select version();
version
----------------------------------------------------------------------------------------------------------
PostgreSQL 8.3.7 on x86_64-unknown-linux-gnu, compiled by GCC
gcc-4.3.real (Ubuntu 4.3.3-5ubuntu4) 4.3.3
(1 row)
Or am I again completely misreading something?
Mike
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