Re: Optimizing left outer join query
Posted by:
Toa Sty
Date: September 25, 2006 03:00AM
Hi Muhammad,
How many rows would you expect vendor_id = 1002 to match? I ask because for some reason MySQL is deciding to table-scan all of vendor_products which seems odd considering you have an index on vendor_id. If most of the rows in the vendor_products table have a vendor_id of 1002 then I'd expect this behaviour but otherwise I wouldn't.
Try running ANALYZE TABLE on both tables and re-running the explain query to see if you get a better result.
Can you post the explain plan afterwards either way please? It would be good to see a count of the number of vendor_id=1002 rows too.
HTH,
Toasty
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email: 'toasty'*3 at gmail
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