siddharthteotia commented on code in PR #8558:
URL: https://github.com/apache/pinot/pull/8558#discussion_r855693573
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pinot-query-planner/src/main/java/org/apache/pinot/query/rules/PinotExchangeNodeInsertRule.java:
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@@ -57,12 +63,26 @@ public boolean matches(RelOptRuleCall call) {
@Override
public void onMatch(RelOptRuleCall call) {
+ // TODO: this only works for single equality JOIN. add generic condition
parser
Join join = call.rel(0);
RelNode leftInput = join.getInput(0);
RelNode rightInput = join.getInput(1);
- RelNode leftExchange = LogicalExchange.create(leftInput,
RelDistributions.SINGLETON);
- RelNode rightExchange = LogicalExchange.create(rightInput,
RelDistributions.BROADCAST_DISTRIBUTED);
+ RelNode leftExchange;
+ RelNode rightExchange;
+ List<RelHint> hints = join.getHints();
+ if (hints.contains(PinotRelationalHints.USE_HASH_JOIN)) {
Review Comment:
Why is this if-else ? In the else part, we will still be doing hashjoin in
the current implementation
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