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From "Na Yang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-7810) Insert overwrite table query has strange behavior when set hive.optimize.union.remove=true [Spark Branch]
Date Sat, 23 Aug 2014 00:44:11 GMT

     [ https://issues.apache.org/jira/browse/HIVE-7810?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Na Yang updated HIVE-7810:
--------------------------

    Description: 
Insert overwrite table query has strange behavior when 
set hive.optimize.union.remove=true
set hive.mapred.supports.subdirectories=true;
set hive.merge.mapfiles=true;
set hive.merge.mapredfiles=true;

We expect the following two sets of queries return the same set of data result, but they do
not. 
1)
{noformat}
insert overwrite table outputTbl1
SELECT * FROM
(
select key, 1 as values from inputTbl1
union all
select * FROM (
  SELECT key, count(1) as values from inputTbl1 group by key
  UNION ALL
  SELECT key, 2 as values from inputTbl1
) a
)b;
select * from outputTbl1 order by key, values;
{noformat}

Below is the query result:
{noformat}
1	1
1	2
2	1
2	2
3	1
3	2
7	1
7	2
8	2
8	2
8	2
{noformat}
2) 
{noformat}
SELECT * FROM
(
select key, 1 as values from inputTbl1
union all
select * FROM (
  SELECT key, count(1) as values from inputTbl1 group by key
  UNION ALL
  SELECT key, 2 as values from inputTbl1
) a
)b order by key, values;
{noformat}
Below is the query result:
{noformat}
1	1
1	1
1	2
2	1
2	1
2	2
3	1
3	1
3	2
7	1
7	1
7	2
8	1
8	1
8	2
8	2
8	2
{noformat}

Some data is missing in the first set of query result. 


  was:
Insert overwrite table query has strange behavior when 
set hive.optimize.union.remove=true
set hive.mapred.supports.subdirectories=true;

We expect the following two sets of queries return the same set of data result, but they do
not. 
1)
{noformat}
insert overwrite table outputTbl1
SELECT * FROM
(
select key, 1 as values from inputTbl1
union all
select * FROM (
  SELECT key, count(1) as values from inputTbl1 group by key
  UNION ALL
  SELECT key, 2 as values from inputTbl1
) a
)b;
select * from outputTbl1 order by key, values;
{noformat}

Below is the query result:
{noformat}
1	1
1	2
2	1
2	2
3	1
3	2
7	1
7	2
8	2
8	2
8	2
{noformat}
2) 
{noformat}
SELECT * FROM
(
select key, 1 as values from inputTbl1
union all
select * FROM (
  SELECT key, count(1) as values from inputTbl1 group by key
  UNION ALL
  SELECT key, 2 as values from inputTbl1
) a
)b order by key, values;
{noformat}
Below is the query result:
{noformat}
1	1
1	1
1	2
2	1
2	1
2	2
3	1
3	1
3	2
7	1
7	1
7	2
8	1
8	1
8	2
8	2
8	2
{noformat}

Some data is missing in the first set of query result. 



> Insert overwrite table query has strange behavior when set hive.optimize.union.remove=true
[Spark Branch]
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-7810
>                 URL: https://issues.apache.org/jira/browse/HIVE-7810
>             Project: Hive
>          Issue Type: Task
>          Components: Spark
>            Reporter: Na Yang
>            Assignee: Na Yang
>
> Insert overwrite table query has strange behavior when 
> set hive.optimize.union.remove=true
> set hive.mapred.supports.subdirectories=true;
> set hive.merge.mapfiles=true;
> set hive.merge.mapredfiles=true;
> We expect the following two sets of queries return the same set of data result, but they
do not. 
> 1)
> {noformat}
> insert overwrite table outputTbl1
> SELECT * FROM
> (
> select key, 1 as values from inputTbl1
> union all
> select * FROM (
>   SELECT key, count(1) as values from inputTbl1 group by key
>   UNION ALL
>   SELECT key, 2 as values from inputTbl1
> ) a
> )b;
> select * from outputTbl1 order by key, values;
> {noformat}
> Below is the query result:
> {noformat}
> 1	1
> 1	2
> 2	1
> 2	2
> 3	1
> 3	2
> 7	1
> 7	2
> 8	2
> 8	2
> 8	2
> {noformat}
> 2) 
> {noformat}
> SELECT * FROM
> (
> select key, 1 as values from inputTbl1
> union all
> select * FROM (
>   SELECT key, count(1) as values from inputTbl1 group by key
>   UNION ALL
>   SELECT key, 2 as values from inputTbl1
> ) a
> )b order by key, values;
> {noformat}
> Below is the query result:
> {noformat}
> 1	1
> 1	1
> 1	2
> 2	1
> 2	1
> 2	2
> 3	1
> 3	1
> 3	2
> 7	1
> 7	1
> 7	2
> 8	1
> 8	1
> 8	2
> 8	2
> 8	2
> {noformat}
> Some data is missing in the first set of query result. 



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