For the archives...
Using 7.4 so IN() is a little slower, so I rewrote it slightly to be
DELETE FROM table WHERE EXISTS (select x from table .... LIMIT ...);
Works very nicely :)
Thanks again.
Neil Conway wrote:
Chris Smith wrote:
I'm trying to use a limit clause with delete, but it doesn't work at the moment
It isn't in the SQL standard, and it would have undefined behavior: the sort order of a result set without ORDER BY is unspecified, so you would have no way to predict which rows DELETE would remove.
delete from table where x='1' limit 1000;
You could use a subquery to achieve this:
DELETE FROM table WHERE x IN (SELECT x FROM table ... ORDER BY ... LIMIT ...);
-Neil
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Chris Smith
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