[multistage] default enable dynamic broadcast for SEMI #11696
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## master #11696 +/- ##
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- Coverage 63.10% 63.05% -0.05%
- Complexity 1120 1121 +1
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Files 2343 2343
Lines 125672 125672
Branches 19317 19317
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- Hits 79309 79248 -61
- Misses 40705 40773 +68
+ Partials 5658 5651 -7
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| && PinotRuleUtils.noExchangeInSubtree(left.getInput(0)) | ||
| && (join.getJoinType() == JoinRelType.SEMI && joinInfo.nonEquiConditions.isEmpty()); | ||
| // default enable dynamic broadcast for SEMI join unless other join strategy were specified | ||
| && (!explicitOtherStrategy && join.getJoinType() == JoinRelType.SEMI && joinInfo.nonEquiConditions.isEmpty()); |
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Is dynamic broadcast useful for non-SEMI join? Currently it won't be applied even if we explicitly hint about it
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it can be in the future. currently it will only apply to SEMI join
Jackie-Jiang
approved these changes
Sep 27, 2023
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there's no reason not to enable dynamic broadcast for SEMI joins at the current status of multi-stage,
except for the situation where the right table is so large and the left table is not partitioned. in which case we have a fallback option to enable hash table join
joinOptions(join_strategy = 'hash_table')