Sam Mason <sam@xxxxxxxxxxxxx> writes:
> I don't really know 8.4, but I believe you're saying here that you
> explicitly want the values to be of basic INTERVAL type here, i.e. not
> INTERVAL DAY TO HOUR for parameter 3.
Right, you can get the equivalent behavior from psql thus:
regression=# select '-12345'::interval::interval year;
interval
----------
00:00:00
(1 row)
regression=# select '12 11'::interval::interval year;
ERROR: invalid input syntax for type interval: "12 11"
LINE 1: select '12 11'::interval::interval year;
^
There is not any way to bind a more specific type to a parameter at the
protocol level.
> I think PG may do the right thing if you
> don't specify the types when preparing the query, but haven't tested.
Yeah, that should work (though I haven't verified it either). Another
common trick is to specify the type in the text of the query by casting
the parameter symbol:
PQprepare( ... $2::INTERVAL YEAR ... );
I'd say this is better style than hard-wiring numeric type OIDs into
your code.
regards, tom lane
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