danny0405 commented on a change in pull request #1543: [Calcite-3455] Redundant
rule firing for both logical and physical nodes
URL: https://github.com/apache/calcite/pull/1543#discussion_r339870118
##########
File path:
core/src/main/java/org/apache/calcite/rel/rules/ProjectMergeRule.java
##########
@@ -54,8 +55,8 @@
*/
public ProjectMergeRule(boolean force, RelBuilderFactory relBuilderFactory) {
super(
- operand(Project.class,
- operand(Project.class, any())),
+ operand(LogicalProject.class,
+ operand(LogicalProject.class, any())),
Review comment:
The changes sounds reasonable to me, but i'm a little worried about the
compatibility. It would give us more confidence if some engine like Druid can
give feedback that this change does not break something
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