Sergey Konoplev wrote:
> 
> I've faced strange parser (or may be planner) behaviour. When I do
> "EXPLAIN SELECT 1 FROM table1 WHERE table1_id IN (...~2000 ids
> here...);" it works as fast as I expect (50 ms). But when I rewrite it
> using NOT IN "EXPLAIN SELECT 1 FROM table1 WHERE table1_id NOT IN
> (...~2000 ids here...);" it gets much more slower (34537 ms).

Can you post the EXPLAIN ANALYSE output from your NOT IN query?

-- 
  Richard Huxton
  Archonet Ltd

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