Pavel,
There is no
DECLARE TEMP CURSOR
or
DECLARE TEMP variable in PLpgSQL
and
CREATE TEMP TABLE has a different meaning from what I understand you
envision for variables.
But maybe I'm mistaken. Your original post did not describe the entire
syntax:
CREATE [TEMP] VARIABLE [IF NOT EXISTS] name
Pavel,
I wouldn't put in the DROP option.
Or at least not in that form of syntax.
By convention CREATE persists DDL and makes object definitions visible
across sessions.
DECLARE defines session private objects which cannot collide with other
sessions.
If you want variables with a short lifetime
Simon,
Nice writeup.
While the standard may not require a unique index for the ON clause I have
never seen a MERGE statement that did not have this property. So IMHO this
is a reasonable restrictions.
In fact I have only ever seen two flavors of usage:
* Single row source (most often simply a
