On 12/3/19 3:37 AM, Alexander Farber wrote:
Thank you Patrick -
On Tue, Dec 3, 2019 at 11:49 AM Patrick FICHE <Patrick.Fiche@xxxxxxxxxxx
<mailto:Patrick.Fiche@xxxxxxxxxxx>> wrote:
It seems that STRICT is the issue.____
But why does your function return a table of boolean in this case ?____
As it only updates one record, it would probably be easier to return
a boolean only.____
CREATE OR REPLACE FUNCTION words_toggle_puzzle(
in_mid bigint
) RETURNS boolean
AS
$func$
UPDATE words_moves
SET puzzle = NOT puzzle
WHERE mid = in_mid
RETURNING puzzle;
$func$ LANGUAGE sql;
your suggestion works well, thank you.
I wanted to use strict, because the mid is a PK - so there should always
be an exactly one record that has been updated
Which you will get without STRICT:
https://www.postgresql.org/docs/11/plpgsql-statements.html#PLPGSQL-STATEMENTS-SQL-ONEROW
"For INSERT/UPDATE/DELETE with RETURNING, PL/pgSQL reports an error for
more than one returned row, even when STRICT is not specified. This is
because there is no option such as ORDER BY with which to determine
which affected row should be returned."
Though I still not sure what was wrong with your initial attempt?:
ERROR: 42601: syntax error at or near "INTO"
LINE 11: INTO STRICT out_puzzle;
^
LOCATION: scanner_yyerror, scan.l:1128
From the error it looks like a hidden space issue or something.
(or otherwise, in very strange cases - the SQL would fail and my
java-servlet would throw SQLException)
Regards
Alex
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
