[
https://issues.apache.org/jira/browse/HIVE-16965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16099186#comment-16099186
]
Sergey Shelukhin commented on HIVE-16965:
-----------------------------------------
Can you link to RB? I saw it but I cannot find the email anymore :)
> SMB join may produce incorrect results
> --------------------------------------
>
> Key: HIVE-16965
> URL: https://issues.apache.org/jira/browse/HIVE-16965
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Deepak Jaiswal
> Attachments: HIVE-16965.1.patch, HIVE-16965.2.patch,
> HIVE-16965.3.patch
>
>
> Running the following on MiniTez
> {noformat}
> set hive.mapred.mode=nonstrict;
> SET hive.vectorized.execution.enabled=true;
> SET hive.exec.orc.default.buffer.size=32768;
> SET hive.exec.orc.default.row.index.stride=1000;
> SET hive.optimize.index.filter=true;
> set hive.fetch.task.conversion=none;
> set hive.exec.dynamic.partition.mode=nonstrict;
> DROP TABLE orc_a;
> DROP TABLE orc_b;
> CREATE TABLE orc_a (id bigint, cdouble double) partitioned by (y int, q
> smallint)
> CLUSTERED BY (id) SORTED BY (id) INTO 2 BUCKETS stored as orc;
> CREATE TABLE orc_b (id bigint, cfloat float)
> CLUSTERED BY (id) SORTED BY (id) INTO 2 BUCKETS stored as orc;
> insert into table orc_a partition (y=2000, q)
> select cbigint, cdouble, csmallint % 10 from alltypesorc
> where cbigint is not null and csmallint > 0 order by cbigint asc;
> insert into table orc_a partition (y=2001, q)
> select cbigint, cdouble, csmallint % 10 from alltypesorc
> where cbigint is not null and csmallint > 0 order by cbigint asc;
> insert into table orc_b
> select cbigint, cfloat from alltypesorc
> where cbigint is not null and csmallint > 0 order by cbigint asc limit 200;
> set hive.cbo.enable=false;
> select y,q,count(*) from orc_a a join orc_b b on a.id=b.id group by y,q;
> set hive.enforce.sortmergebucketmapjoin=false;
> set hive.optimize.bucketmapjoin=true;
> set hive.optimize.bucketmapjoin.sortedmerge=true;
> set hive.auto.convert.sortmerge.join=true;
> set hive.auto.convert.join=true;
> set hive.auto.convert.join.noconditionaltask.size=10;
> explain
> select y,q,count(*) from orc_a a join orc_b b on a.id=b.id group by y,q;
> select y,q,count(*) from orc_a a join orc_b b on a.id=b.id group by y,q;
> DROP TABLE orc_a;
> DROP TABLE orc_b;
> {noformat}
> Produces different results for the two selects. The SMB one looks incorrect.
> cc [~djaiswal] [~hagleitn]
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
