jcamachor commented on a change in pull request #812: Hive 22324
URL: https://github.com/apache/hive/pull/812#discussion_r337262615
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/HiveSemiJoinRule.java
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@@ -118,7 +118,7 @@ protected void perform(final RelOptRuleCall call, final
ImmutableBitSet topRefs,
call.transformTo(topOperator.copy(topOperator.getTraitSet(),
ImmutableList.of(left)));
return;
}
- if (join.getJoinType() != JoinRelType.INNER) {
+ if (join.getJoinType() != JoinRelType.INNER && !join.isSemiJoin()) {
Review comment:
If this is already a semijoin, we should bail out immediately since this
rule is trying to transform a join into a semijoin?
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