pgaref commented on a change in pull request #1147:
URL: https://github.com/apache/hive/pull/1147#discussion_r458082243
##########
File path: common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
##########
@@ -2162,7 +2162,8 @@ private static void populateLlapDaemonVarsSet(Set<String>
llapDaemonVarsSetLocal
"Whether Hive enables the optimization about converting common join
into mapjoin based on the input file size. \n" +
"If this parameter is on, and the sum of size for n-1 of the
tables/partitions for a n-way join is smaller than the\n" +
"specified size, the join is directly converted to a mapjoin (there is
no conditional task)."),
-
+ HIVE_CONVERT_ANTI_JOIN("hive.auto.convert.anti.join", false,
Review comment:
Agree with the above, I believe we should enable anti-join by default as
1) this feature should aways improve runtime 2) can help us find possible
issues and further optimize existing implementation
----------------------------------------------------------------
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:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
