| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Greg Rychlewski <greg(dot)rychlewski(at)gmail(dot)com> |
| Cc: | pgsql-hackers(at)lists(dot)postgresql(dot)org |
| Subject: | Re: pg_attribute.atttypmod for interval type |
| Date: | 2024-07-27 04:32:25 |
| Message-ID: | 1913262.1722054745@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Greg Rychlewski <greg(dot)rychlewski(at)gmail(dot)com> writes:
> My question is: how are the values meant to be interpreted for interval
> types? Thanks very much for your help.
Interval typmods include a fractional-seconds-precision field as well
as a bitmask indicating the allowed interval fields (per the SQL
standard's weird syntax such as INTERVAL DAY TO SECOND). Looking at
the source code for intervaltypmodout() might be helpful:
The referenced macros are mostly in utils/timestamp.h and
utils/datetime.h.
regards, tom lane
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