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Haisheng Yuan commented on CALCITE-3159: ---------------------------------------- Sure, thanks! > Distinct can be removed for MIN/MAX/BIT_OR/BIT_AND aggregate functions > ---------------------------------------------------------------------- > > Key: CALCITE-3159 > URL: https://issues.apache.org/jira/browse/CALCITE-3159 > Project: Calcite > Issue Type: Improvement > Components: core > Reporter: Haisheng Yuan > Priority: Major > > For the following query: > {code:java} > select a, min(distinct b), bit_or(distinct c) from foo group by a; > {code} > Currently Calcite still preserve the distinct for these aggregate functions, > but DISTINCT is not meaningful with MIN/MAX and is available for ISO > compatibility only. We can safely remove distinct and get more optimization > opportunities. -- This message was sent by Atlassian JIRA (v7.6.3#76005)