englefly commented on code in PR #64440:
URL: https://github.com/apache/doris/pull/64440#discussion_r3435030965
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/AccessPathExpressionCollector.java:
##########
@@ -374,26 +374,82 @@ public Void visitMapValues(MapValues mapValues,
CollectorContext context) {
return continueCollectAccessPath(mapValues.getArgument(0), context);
}
- private static boolean isFunctionNullCheckPath(List<String> suffixPath) {
+ private static boolean isUnderIsNull(List<String> suffixPath) {
return suffixPath.size() == 1 &&
AccessPathInfo.ACCESS_NULL.equals(suffixPath.get(0));
}
@Override
public Void visitMapContainsKey(MapContainsKey mapContainsKey,
CollectorContext context) {
+ // MAP_CONTAINS_KEY(<map>, <key>)
+ //
+ // isUnderIsNull checks whether the parent of this expression is IS
NULL,
+ // splitting queries into two shapes:
+ //
+ // Shape A (parent is IS NULL):
Review Comment:
done
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