xiedeyantu commented on code in PR #4691:
URL: https://github.com/apache/calcite/pull/4691#discussion_r2629223642
##########
core/src/main/java/org/apache/calcite/rex/RexUtil.java:
##########
@@ -3191,6 +3192,19 @@ public static List<RexSubQuery> collect(Project project)
{
}
return subQueryCollector.subQueries;
}
+
+ public static List<RexSubQuery> collect(Filter filter) {
Review Comment:
I may not have explained it clearly, but that's roughly the idea.
```
public static List<RexSubQuery> collect(RexNode rex) {
SubQueryCollector subQueryCollector = new SubQueryCollector();
rex.accept(subQueryCollector);
return subQueryCollector.subQueries;
}
```
Just use it like:
```
List<RexSubQuery> subQueries =
RexUtil.SubQueryCollector.collect(filter.getCondition());
List<RexSubQuery> subQueries =
RexUtil.SubQueryCollector.collect(join.getCondition());
```
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