Airblader commented on a change in pull request #17186:
URL: https://github.com/apache/flink/pull/17186#discussion_r709343636
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File path:
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/planner/codegen/ExpressionReducer.scala
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@@ -78,6 +79,10 @@ class ExpressionReducer(
(SqlTypeName.MAP, _) |
(SqlTypeName.MULTISET, _) => None
+ // Exclude some JSON functions which behave differently when called as
an argument of another
Review comment:
Yes, that's it. :-) We give this function some funky behavior to make it
more useful, but in consequence we cannot have it be reduced.
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