Hello All,

Our queries were running fine on MySQL 4.1.11. Since we upgraded to MySQL 
5.0.22 The same queries are taking a long long time to execute.

Running an explain on the queries shows an index_merge in the type column.

And it shows using intersect  algorithm in Extra column of the output.

Previously(MySQL 4.1.11) Explain showed the usage of primary Key as the index.

How can this be resolved?

Thanks
Ratheesh K J

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