raminqaf commented on code in PR #29343:
URL: https://github.com/apache/flink/pull/29343#discussion_r4145179612
##########
flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/functions/scalar/ParseJsonFunction.java:
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@@ -38,8 +38,9 @@ public
ParseJsonFunction(SpecializedFunction.SpecializedContext context) {
return eval(jsonStr, false);
}
- public @Nullable Variant eval(@Nullable StringData jsonStr, boolean
allowDuplicateKeys) {
- if (jsonStr == null) {
+ public @Nullable Variant eval(
+ @Nullable StringData jsonStr, @Nullable Boolean
allowDuplicateKeys) {
+ if (jsonStr == null || allowDuplicateKeys == null) {
Review Comment:
So this means for a case like
```
SELECT PARSE_JSON('{"key":"value"}', CAST(NULL AS BOOLEAN));
```
I will get `NULL`? How about if NULL is passed we continue with the default
value `allowDuplicateKeys=false`?
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