matriv commented on a change in pull request #18030:
URL: https://github.com/apache/flink/pull/18030#discussion_r763376832
##########
File path:
flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/functions/casting/CastRuleProvider.java
##########
@@ -213,4 +217,11 @@ private CastRuleProvider addRule(CastRule<?, ?> rule) {
.findFirst()
.orElse(null);
}
+
+ private LogicalType unwrapDistinct(LogicalType logicalType) {
+ if (logicalType.is(LogicalTypeRoot.DISTINCT_TYPE)) {
Review comment:
Hm, on second thought this must be done before actually resolving any
rule, so if it's an `ARRAY` then we don't want to extract the underlying type.
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