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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...
2 emails [+ more]    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...
2 emails [+ more]    Author: Yin Huai, 2013-11-14, 04:29
[HIVE-5697] Correlation Optimizer may generate wrong plans for cases involving outer join - Hive - [issue]
...For example,select x.key, y.value, count(*) from src x right outer join src1 y on (x.key=y.key and x.value=y.value) group by x.key, y.value; Correlation optimizer will determine that a singl...
http://issues.apache.org/jira/browse/HIVE-5697    Author: Yin Huai, 2013-11-10, 16:20
Re: [ANNOUNCE] New Hive Committer - Xuefu Zhang - Hive - [mail # dev]
...Congrats Xuefu!   On Mon, Nov 4, 2013 at 7:11 AM, Lianhui Wang wrote:  ...
   Author: Yin Huai, 2013-11-04, 13:34
Review Request 15101: HIVE-5697: Correlation Optimizer may generate wrong plans for cases involving outer join - Hive - [mail # dev]
...This is an automatically generated e-mail. To reply, visit: https://reviews.apache.org/r/15101/  Review request for hive.   Bugs: HIVE-5697     https://issues.apache.org/...
   Author: Yin Huai, 2013-10-30, 18:34
Re: [ANNOUNCE] New Hive PMC Members - Thejas Nair and Brock Noland - Hive - [mail # user]
...Congratulations, Brock and Thejas!   On Thu, Oct 24, 2013 at 6:36 PM, Prasanth Jayachandran  wrote:  ...
   Author: Yin Huai, 2013-10-24, 23:34
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