Tom Lane escribió:
> However, the interval version of the function can capture the time case
> because there's an implicit cast from time to interval:
>
> regression=# select casttarget::regtype,castcontext,castfunc::regprocedure from pg_cast where castsource =
'time'::regtype;
> casttarget | castcontext | castfunc
> ------------------------+-------------+----------------------------------------
> interval | i | "interval"(time without time zone)
> time with time zone | i | timetz(time without time zone)
> time without time zone | i | "time"(time without time zone,integer)
> (3 rows)
BTW it very much looks like we should have a pg_casts view that displays
these things in a human-readable manner (like the above except with
castcontext expanded)
--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support
