becketqin commented on code in PR #23313:
URL: https://github.com/apache/flink/pull/23313#discussion_r1324619744
##########
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/planner/plan/utils/RexNodeExtractor.scala:
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@@ -538,8 +550,34 @@ class RexNodeToExpressionConverter(
}
}
- override def visitFieldAccess(fieldAccess: RexFieldAccess):
Option[ResolvedExpression] = None
+ override def visitFieldAccess(fieldAccess: RexFieldAccess):
Option[ResolvedExpression] = {
+ fieldAccess.getReferenceExpr match {
+ // push down on nested field inside a composite type like map or array
is not supported
+ case _: RexCall => return None
Review Comment:
Nit: The RexCall also includes aggregation. Maybe update the comment to
make that clear as well.
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