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pengzhiwei commented on CALCITE-2620: ------------------------------------- [~julianhyde],In -CALCITE-2506- this issue has not fixed. I fix it in the [PR882|[http://example.com|https://github.com/apache/calcite/pull/882]] > Simplify "coalesce(null,x)" to "x" > ---------------------------------- > > Key: CALCITE-2620 > URL: https://issues.apache.org/jira/browse/CALCITE-2620 > Project: Calcite > Issue Type: Improvement > Components: core > Affects Versions: 1.18.0 > Reporter: pengzhiwei > Assignee: Julian Hyde > Priority: Major > > "coalesce(x0,x1,.....)" can be simplified if any of "xi" is null literal. > e.g. "coalesce(null,x)" can simplify to "x", "coalesce(x,null,y)" can > simplify to "coalesce(x,y)" -- This message was sent by Atlassian JIRA (v7.6.3#76005)