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Re: force index on text & integer joiin
Posted by: KimSeong Loh
Date: February 12, 2007 07:35PM

If you do an outer join, yuo can cast the integer to char(30) and it will use the index.

Try this.
EXPLAIN Select * From table1 Left Join table2 On mdata=CAST(id AS CHAR(30))\G
EXPLAIN Select * From table2 Left Join table1 On id=mdata\G

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