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https://issues.apache.org/jira/browse/HIVE-3909?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13556893#comment-13556893
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Phabricator commented on HIVE-3909:
-----------------------------------
navis has commented on the revision "HIVE-3909 [jira] Wrong data due to
HIVE-2820".
Removed all of the confusing order mapping from mapjoins.
REVISION DETAIL
https://reviews.facebook.net/D8013
To: JIRA, navis
> Wrong data due to HIVE-2820
> ---------------------------
>
> Key: HIVE-3909
> URL: https://issues.apache.org/jira/browse/HIVE-3909
> Project: Hive
> Issue Type: Bug
> Reporter: Namit Jain
> Assignee: Navis
> Attachments: HIVE-3909.D8013.1.patch
>
>
> Consider the query:
> ~/hive/hive1$ more ql/src/test/queries/clientpositive/join_reorder4.q
> CREATE TABLE T1(key1 STRING, val1 STRING) STORED AS TEXTFILE;
> CREATE TABLE T2(key2 STRING, val2 STRING) STORED AS TEXTFILE;
> CREATE TABLE T3(key3 STRING, val3 STRING) STORED AS TEXTFILE;
> LOAD DATA LOCAL INPATH '../data/files/T1.txt' INTO TABLE T1;
> LOAD DATA LOCAL INPATH '../data/files/T2.txt' INTO TABLE T2;
> LOAD DATA LOCAL INPATH '../data/files/T3.txt' INTO TABLE T3;
> set hive.auto.convert.join=true;
> explain select /*+ STREAMTABLE(a) */ a.*, b.*, c.* from T1 a join T2 b on
> a.key1=b.key2 join T3 c on a.key1=c.key3;
> select /*+ STREAMTABLE(a) */ a.*, b.*, c.* from T1 a join T2 b on
> a.key1=b.key2 join T3 c on a.key1=c.key3;
> explain select /*+ STREAMTABLE(b) */ a.*, b.*, c.* from T1 a join T2 b on
> a.key1=b.key2 join T3 c on a.key1=c.key3;
> select /*+ STREAMTABLE(b) */ a.*, b.*, c.* from T1 a join T2 b on
> a.key1=b.key2 join T3 c on a.key1=c.key3;
> explain select /*+ STREAMTABLE(c) */ a.*, b.*, c.* from T1 a join T2 b on
> a.key1=b.key2 join T3 c on a.key1=c.key3;
> select /*+ STREAMTABLE(c) */ a.*, b.*, c.* from T1 a join T2 b on
> a.key1=b.key2 join T3 c on a.key1=c.key3;
> select /*+ STREAMTABLE(b) */ a.*, b.*, c.* from T1 a join T2 b on
> a.key1=b.key2 join T3 c on a.key1=c.key3;
> returns:
> 2 12 2 12 2 22
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