[jira] [Created] (CALCITE-2051) Rules using Aggregate might check for simple grouping sets incorrectly

[Jesus Camacho Rodriguez (JIRA)]

Jesus Camacho Rodriguez created CALCITE-2051:
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             Summary: Rules using Aggregate might check for simple grouping 
sets incorrectly
                 Key: CALCITE-2051
                 URL: https://issues.apache.org/jira/browse/CALCITE-2051
             Project: Calcite
          Issue Type: Bug
          Components: core
            Reporter: Jesus Camacho Rodriguez
            Assignee: Jesus Camacho Rodriguez
            Priority: Critical
             Fix For: 1.15.0


CALCITE-1069 removed the indicator columns for Aggregate operators. In some 
places, the indicator boolean check was replaced by the following check: 
{{aggregate.getGroupSets().size() > 1}}. However, that check is incomplete, it 
should have been replace by {{aggregate.getGroupType() == Group.SIMPLE}}.

For instance : 
https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/rel/rules/AggregateProjectMergeRule.java#L91




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