wenhuitang commented on a change in pull request #1462:
[CALCITE-3353]ProjectJoinTransposeRule caused AssertionError when creating a
new Join
URL: https://github.com/apache/calcite/pull/1462#discussion_r327400935
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File path:
core/src/main/java/org/apache/calcite/rel/rules/ProjectJoinTransposeRule.java
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@@ -142,13 +144,9 @@ public void onMatch(RelOptRuleCall call) {
// create a new join with the projected children
Join newJoinRel =
- join.copy(
Review comment:
It seems that the reason for #EnumerableMergeJoin.copy throwing
AssertionError is that the #join.copy use #join.getTraitSet() directly. But the
collation may have offset since the new join has new left and new right. So the
RelCollation of the TraitSet should be update. I am working for that.
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