## Rajesh S (rajesh.s@xxxxxxxxxxx):
> We are migrating our database from Oracle to Postgresql. In oracle we
> have used this syntax "SELECT ('1999-12-30'::DATE) -
> ('1999-12-11'::DATE)" to get difference between two dates as a integer
> output (ex: 19). But in Postgres the same query returns result as "19
> days".
There's something fishy going on, as (date) - (date) returns integer
since a very long time (even the version 8.0 docs have that).
On the other hand, (timestamp) - (timestamp) gives an interval, so
first make sure you really got the data types right.
> CREATE OR REPLACE FUNCTION public.dt_minus_dt(
> dt1 timestamp without time zone,
> dt2 timestamp without time zone)
See? There's TIMESTAMP, not DATE.
> LANGUAGE 'edbspl'
Is this really PostgreSQL or is it that fork - and if it's the fork,
does it behave the same way as stock PostgreSQL does? (I would be
surprised if that deviates in this place, but...).
> SELECT DATE_PART('day', dt1::timestamp - dt2::timestamp)::integer
And TIMESTAMP again.
Regards,
Christoph
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