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Re: Review Request 16172: ql.plan.ConditionalResolverCommonJoin.resolveMapJoinTask also sums those tables which are not used in the child of this conditional task. - Hive - [mail # dev]
...This is an automatically generated e-mail. To reply, visit: https://reviews.apache.org/r/16172/#review30977    ql/src/java/org/apache/hadoop/hive/ql/plan/ConditionalResolverCommonJ...
   Author: Yin Huai, 2013-12-30, 21:46
Re: ORC file tuning - Hive - [mail # user]
...Hi Avrilia,  In org.apache.hadoop.hive.ql.io.orc.WriterImpl, the block size is determined by Math.min(1.5GB, 2 * stripeSize). Also, you can use "orc.block.padding" in the table property...
   Author: Yin Huai, 2013-12-30, 15:58
Re: [ANNOUNCE] New Hive PMC Member - Gunther Hagleitner - Hive - [mail # dev]
...Congrats Gunther!   On Fri, Dec 27, 2013 at 10:13 AM, Brock Noland  wrote:  ...
   Author: Yin Huai, 2013-12-27, 15:33
Re: Review Request 16422: HIVE-5891: Alias conflict when merging multiple mapjoin tasks into their common child mapred task - Hive - [mail # dev]
...This is an automatically generated e-mail. To reply, visit: https://reviews.apache.org/r/16422/#review30745    /trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/physical/Commo...
   Author: Yin Huai, 2013-12-20, 14:53
Re: Question on correlation optimizer - Hive - [mail # user]
...Hi Avrilia,  I am attaching the operator tree in the reduce side. [image: Inline image 1]  When printing out the plan, MuxOperator was called twice from its both parents. So, the p...
   Author: Yin Huai, 2013-12-11, 14:34
[HIVE-6007] Make the output of the reduce side plan optimized by the correlation optimizer more reader-friendly. - Hive - [issue]
...Because a MuxOperator can have multiple parents, the output of the plan can show the sub-plan starting from this MuxOperator multiple times, which makes the reduce side plan confusing. An ex...
http://issues.apache.org/jira/browse/HIVE-6007    Author: Yin Huai, 2013-12-11, 14:32
Does the trunk still have an eclipse formatter? - Hive - [mail # dev]
...Hi all,  After importing the trunk to eclipse, I found that eclipse did not load the hive formatter. Does trunk still have one? If so, where is the location of it?  Thanks,  Y...
   Author: Yin Huai, 2013-12-04, 16:55
[HIVE-4827] Merge a Map-only task to its child task - Hive - [issue]
...When hive.optimize.mapjoin.mapreduce is on, CommonJoinResolver can attach a Map-only job (MapJoin) to its following MapReduce job. But this merge only happens when the MapReduce job has a si...
http://issues.apache.org/jira/browse/HIVE-4827    Author: Yin Huai, 2013-11-26, 16:50
Re: TPC-H queries on Hive 0.12 - Hive - [mail # user]
...I remember that textfiles are used in those scripts. With 0.12, I think ORC should be used. Also, I think those sub-queries should be merged into a single query. With a single query, if a re...
   Author: Yin Huai, 2013-11-22, 19:44
Re: ORC Tuning - Examples? - Hive - [mail # user]
...Hi John,  I have not played with the stride length. Based on my understanding of the code, since the stride length determines the number of rows between index entries, if you decrease t...
   Author: Yin Huai, 2013-11-14, 04:29
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