Re: BUG #18348: Inconsistency with EXTRACT([field] from INTERVAL); - Mailing list pgsql-bugs

From David Rowley
Subject Re: BUG #18348: Inconsistency with EXTRACT([field] from INTERVAL);
Date
Msg-id CAApHDvoKGDM=1v1HHGoq6-7mjdqgMYFKk-YSu=iimFz6N6ngDA@mail.gmail.com
Whole thread Raw
In response to Re: BUG #18348: Inconsistency with EXTRACT([field] from INTERVAL);  (Michael Bondarenko <work.michael.2956@gmail.com>)
List pgsql-bugs
On Sat, 17 Feb 2024 at 01:27, Michael Bondarenko
<work.michael.2956@gmail.com> wrote:
>
> Adding another inconsistency I found in the docs to this thread
(https://www.postgresql.org/docs/current/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT):
>
> The docs say: "source must be a value expression of type timestamp, time, or interval. (Expressions of type date are
castto timestamp and can therefore be used as well.)"
 
>
> Which implies that the following two results must be the same:
>
> tpch=# select extract(microseconds from date '1924.01.01');
> ERROR:  date units "microseconds" not supported
>
> tpch=# select extract(microseconds from (date '1924.01.01')::timestamp);
>  extract
> ---------
>        0

It looks like a2da77cdb should have updated the documentation for this.

David



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