Reduce the memory utilization of the engine when the cardinality of the group by columns is big #473
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jvshahid
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Apr 25, 2014
Reduce the memory utilization of the engine when the cardinality of the group by columns is big
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This pr contains improvements to the engine that was driven by a user data set that has high group by cardinality. That said, most of the improvements are going to benefit other types of queries as well.