MYSQL update with WHERE SELECT subquery error

Question

I have an issue with getting select sub-queries to work on an UPDATE. I\'m trying something like the following:

UPDATE foo
   SET bar=bar-1
 WHE         


        

Answer 1

Because of error 1093 Error 1093 (ER_UPDATE_TABLE_USED) SQLSTATE = HY000. The work around is to create a temporary table.

CREATE TEMPORARY table foo_bak (SELECT baz from foo WHERE fooID='1');

UPDATE foo
  SET foo.bar=foo.bar-1
WHERE foo.baz =
  (
    SELECT baz
    FROM foo_bak
  );

DROP TABLE foo_bak;