Peter Fein <pfein@xxxxxxxxx> writes:
> Sorry, I kinda wrote that wrong. ;) What I really want is:
> SELECT rows of known, app-generated (app_name, app_id)
> INTERSECT
> SELECT t1.symbol AS app_name, t2.outside_key AS app_id
> FROM t2 LEFT JOIN t1 ON t1.t2_id=t2.id
> There are around a max of 50 rows in the first select and
> perhaps up to 1 million in the second.
You could do it like
(
SELECT appname1, appid1
UNION ALL
SELECT appname2, appid2
UNION ALL
...
SELECT appnameN, appidN
)
INTERSECT
SELECT ...
The UNION ALL bit is a tad grotty, but it will do until someone gets
around to implementing the full SQL VALUES construct.
regards, tom lane
---------------------------(end of broadcast)---------------------------
TIP 8: explain analyze is your friend
