[jira] [Updated] (HIVE-13932) Hive SMB Map Join with small set of LIMIT failed with NPE

["Yongzhi Chen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-13932?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yongzhi Chen updated HIVE-13932:
--------------------------------
    Attachment: HIVE-13932.1.patch

The code should have null value check. Attach the fix.

> Hive SMB Map Join with small set of LIMIT failed with NPE
> ---------------------------------------------------------
>
>                 Key: HIVE-13932
>                 URL: https://issues.apache.org/jira/browse/HIVE-13932
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 1.0.0, 2.0.0
>            Reporter: Yongzhi Chen
>            Assignee: Yongzhi Chen
>         Attachments: HIVE-13932.1.patch
>
>
> 1) prepare sample data:
> a=1
> while [[ $a -lt 100 ]]; do echo $a ; let a=$a+1; done > data
> 2) prepare source hive table:
> CREATE TABLE `s`(`c` string);
> load data local inpath 'data' into table s;
> 3) prepare the bucketed table:
> set hive.enforce.bucketing=true;
> set hive.enforce.sorting=true;
> CREATE TABLE `t`(`c` string) CLUSTERED BY (c) SORTED BY (c) INTO 5 BUCKETS;
> insert into t select * from s;
> 4) reproduce this issue:
> SET hive.auto.convert.sortmerge.join = true;
> SET hive.auto.convert.sortmerge.join.bigtable.selection.policy = org.apache.hadoop.hive.ql.optimizer.LeftmostBigTableSelectorForAutoSMJ;
> SET hive.auto.convert.sortmerge.join.noconditionaltask = true;
> SET hive.optimize.bucketmapjoin = true;
> SET hive.optimize.bucketmapjoin.sortedmerge = true;
> select * from t join t t1 on t.c=t1.c limit 1;



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