SOLR-15974: Remove Calcite's ENUMERABLE_AGGREGATE_RULE as Solr only supports push-down for LogicalAggregate #626
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https://issues.apache.org/jira/browse/SOLR-15974
Disable the
EnumerableRules.ENUMERABLE_AGGREGATE_RULE
optimization so that Solr only deals with LogicalAggregate. I looked into adding another rule for EnumerableAggregate but it seemed like we don't need this optimization from Calcite since we're pushing down into Solr's agg engine anyway, we don't need a bunch of optimizations in the Calcite layer.