DonnyZone commented on a change in pull request #1556: [CALCITE-3438] Validator
should disallow use of the GROUPING function inside a FILTER clause
URL: https://github.com/apache/calcite/pull/1556#discussion_r349095001
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File path: core/src/main/java/org/apache/calcite/sql/validate/AggVisitor.java
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@@ -44,6 +44,9 @@
* or group auxiliary functions (e.g. {@code TUMBLE_START}). */
protected final boolean group;
protected final SqlNameMatcher nameMatcher;
+ /** Whether to find grouping functions (i.e., {@code GROUP_ID},
+ * {@code GROUPING_ID}, {@code GROUPING}).*/
+ private boolean grouping = false;
Review comment:
Yes, this patch only enables `AggVisitor` to find grouping functions in
Filter, without changing the beheavior in other places.
Without this patch, I also tested remove the condition `!(operator
instanceof SqlAbstractGroupFunction)` in `AggVisitor`, the query does not
throw any exceptions.
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