zhztheplayer commented on a change in pull request #1203: [CALCITE-3017]
Improve null handling of JsonValueExpressionOperator
URL: https://github.com/apache/calcite/pull/1203#discussion_r283743481
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File path:
core/src/main/java/org/apache/calcite/adapter/enumerable/RexImpTable.java
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@@ -984,6 +986,8 @@ private static Expression implementNullSemantics(
: call.getOperands();
switch (nullAs) {
case NULL:
+ case IS_NULL:
Review comment:
Reason of the change:
`IS_NULL`/`IS_NOT_NULL` define the boolean return based on the nullability
of original return value. The use of them should not break trivial null
handling for operands.
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