rubenada commented on a change in pull request #1293: [CALCITE-3165]
Project#accept(RexShuttle shuttle) does not update rowType
URL: https://github.com/apache/calcite/pull/1293#discussion_r299447822
##########
File path: core/src/main/java/org/apache/calcite/rel/core/Project.java
##########
@@ -145,6 +146,12 @@ public RelNode accept(RexShuttle shuttle) {
if (this.exps == exps) {
return this;
}
+ final RelDataType rowType =
+ RexUtil.createStructType(
Review comment:
In the real-life scenario when I found this issue, I had a
RelHomogeneousShuttle with a RexShuttle performing some modifications, and I
saw that the Project copies maintain the "old" rowType, even though they have
been modified by the shuttle (as the unit test example):
```
class MyRelNodeShuttle extends RelHomogeneousShuttle {
private final RexShuttle myRexShuttle= new RexShuttle() {
...
};
@Override public final RelNode visit(RelNode other) {
RelNode next = super.visit(other);
return next.accept(this.myRexShuttle);
}
}
```
`RelNode relNode2 = relNode.accept(new MyRelNodeShuttle());`
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