snuyanzin commented on code in PR #21993:
URL: https://github.com/apache/flink/pull/21993#discussion_r1130031361
##########
flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/inference/strategies/ArrayElementArgumentTypeStrategy.java:
##########
@@ -42,9 +42,14 @@ public Optional<DataType> inferArgumentType(
CallContext callContext, int argumentPos, boolean throwOnFailure) {
final ArrayType haystackType =
(ArrayType)
callContext.getArgumentDataTypes().get(0).getLogicalType();
- final LogicalType haystackElementType = haystackType.getElementType();
final LogicalType needleType =
callContext.getArgumentDataTypes().get(argumentPos).getLogicalType();
+ LogicalType haystackElementType = haystackType.getElementType();
+
+ if (!haystackElementType.isNullable() && needleType.isNullable()) {
+ haystackElementType = haystackType.getElementType().copy(true);
Review Comment:
```suggestion
haystackElementType = haystackElementType.copy(true);
```
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