Alvaro Herrera wrote:
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)
Could we change the data types of the pg_cast table to regprocedure and
regtype instead?
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