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Alex Rivera
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Take the following expression: FALSE AND (expression) Will MySQL evaluate the expression or just move on as soon as it sees FALSE ? Some background context-- I wanted to speed up a query by doing: JOIN... ON (indexed_column1=indexed_column2 AND non_indexed_column_a=non_indexed_column_b) For background on why I'm doing this query see this answer If it's going to always evaluate non_indexed_column_a=non_indexed_column_b then no time is saved with that.
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