kangkaisen commented on a change in pull request #4424:
URL: https://github.com/apache/incubator-doris/pull/4424#discussion_r474634489
##########
File path:
fe/fe-core/src/main/java/org/apache/doris/planner/DistributedPlanner.java
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@@ -361,13 +361,17 @@ private PlanFragment createHashJoinFragment(HashJoinNode
node, PlanFragment righ
// side to be partitioned for correctness)
// - and the expected size of the hash tbl doesn't exceed
perNodeMemLimit
// we set partition join as default when broadcast join cost equals
partition join cost
- if (node.getJoinOp() != JoinOperator.RIGHT_OUTER_JOIN
- && node.getJoinOp() != JoinOperator.FULL_OUTER_JOIN
- && (perNodeMemLimit == 0 || Math.round(
- (double) rhsDataSize * PlannerContext.HASH_TBL_SPACE_OVERHEAD)
<= perNodeMemLimit)
- && (node.getInnerRef().isBroadcastJoin() ||
(!node.getInnerRef().isPartitionJoin()
- && isBroadcastCostSmaller(broadcastCost, partitionCost)))) {
- doBroadcast = true;
+ if (node.getJoinOp() != JoinOperator.RIGHT_OUTER_JOIN &&
node.getJoinOp() != JoinOperator.FULL_OUTER_JOIN) {
+ if (node.getInnerRef().isBroadcastJoin()) {
+ // explicitly told
Review comment:
```suggestion
// respect user join hint
```
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