zabetak opened a new pull request #1544: URL: https://github.com/apache/hive/pull/1544
### What changes were proposed in this pull request? Use hash(hash(hash(a,b),c),d) instead of hash(a,b,c,d) when constructing the multi-col semijoin reducer. ### Why are the changes needed? In order to use fully vectorized execution on multi-col semijoin reducers. ### Does this PR introduce _any_ user-facing change? Only changes in EXPLAIN plans. ### How was this patch tested? `mvn test -Dtest=TestTezPerfCliDriver -Dqfile="query50.q"` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: gitbox-unsubscr...@hive.apache.org For additional commands, e-mail: gitbox-h...@hive.apache.org