2017-10-19 17:21 GMT+02:00 Igal @ Lucee.org <igal@lucee.org>:
Hello,
In other database servers, which I'm finally dropping in favor of Postgres, I can do the following (mind you that this is for illustration only, I do not actually write queries like that):
DECLARE @query varchar(64) = 'red widget';
SELECT * FROM products WHERE col1 LIKE @query OR col2 LIKE @query OR col3 LIKE @query OR col4 LIKE @query OR col5 LIKE @query
The point is, though, that I can change the @query variable in one place which is very convenient.
Is it still true (the posts I see on this subject are quite old) that I can not do so in Postgres outside of a stored procedure/function? And if so, what's the reason of not adding this feature? Seems very useful to me.
There was lot of discussion about server side variables https://wiki.postgresql.org/wiki/Variable_Design, but nobody write final patch. There is not clean result if we want dynamic variables, static variables or both.
p.s. Your query should be terribly slow. When I see it, I am less sure, so server side variables are good idea :)