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From "Matt McCline (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HIVE-13865) Changing char column of orc table to string/var char drops white space.
Date Thu, 02 Jun 2016 20:55:59 GMT

     [ https://issues.apache.org/jira/browse/HIVE-13865?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matt McCline reassigned HIVE-13865:
-----------------------------------

    Assignee: Matt McCline

> Changing char column of orc table to string/var char drops white space. 
> ------------------------------------------------------------------------
>
>                 Key: HIVE-13865
>                 URL: https://issues.apache.org/jira/browse/HIVE-13865
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 1.2.1
>            Reporter: Takahiko Saito
>            Assignee: Matt McCline
>
> Creating a orc table with char(16) column and insert some value with white space followed
by characters:
> {noformat}
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> create table test (c char(16)) stored
as orc;
> No rows affected (0.1 seconds)
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> insert into table test values ('horton
works     ');
> INFO  : Tez session hasn't been created yet. Opening session
> INFO  : Dag name: insert into table test values ('horton ...')(Stage-1)
> INFO  :
> INFO  : Status: Running (Executing on YARN cluster with App id application_1464222003837_0399)
> INFO  : Map 1: -/-
> INFO  : Map 1: 0/1
> INFO  : Map 1: 0/1
> INFO  : Map 1: 0/1
> INFO  : Map 1: 0(+1)/1
> INFO  : Map 1: 0(+1)/1
> INFO  : Map 1: 1/1
> INFO  : Loading data to table default.test from hdfs://os-r6-ifsmes-hiveserver2-11-5.openstacklocal:8020/apps/hive/warehouse/test/.hive-staging_hive_2016-05-26_17-43-07_098_2458959255563595485-1/-ext-10000
> INFO  : Table default.test stats: [numFiles=1, numRows=1, totalSize=267, rawDataSize=100]
> No rows affected (25.125 seconds)
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> select * from test;
> +-------------------+--+
> |      test.c       |
> +-------------------+--+
> | horton works      |
> +-------------------+--+
> 1 row selected (0.077 seconds)
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> describe test;
> +-----------+------------+----------+--+
> | col_name  | data_type  | comment  |
> +-----------+------------+----------+--+
> | c         | char(16)   |          |
> +-----------+------------+----------+--+
> 1 row selected (0.153 seconds)
> {noformat}
> Then after changing the column to string, the white space is lost:
> {noformat}
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> alter table test change column c c
string;
> No rows affected (0.155 seconds)
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> describe test;
> +-----------+------------+----------+--+
> | col_name  | data_type  | comment  |
> +-----------+------------+----------+--+
> | c         | string     |          |
> +-----------+------------+----------+--+
> 1 row selected (0.115 seconds)
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> select * from test;
> +---------------+--+
> |    test.c     |
> +---------------+--+
> | horton works  |
> +---------------+--+
> 1 row selected (0.068 seconds)
> {noformat}
> The issue is not seen with textfile formatted table:
> {noformat}
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> create table test_text (c char(16))
stored as textfile;
> No rows affected (0.091 seconds)
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> insert into table test_text values
('horton works     ');
> INFO  : Session is already open
> INFO  : Dag name: insert into table test_text values ('ho...')(Stage-1)
> INFO  :
> INFO  : Status: Running (Executing on YARN cluster with App id application_1464222003837_0399)
> INFO  : Map 1: 0/1
> INFO  : Map 1: 0(+1)/1
> INFO  : Map 1: 1/1
> INFO  : Loading data to table default.test_text from hdfs://os-r6-ifsmes-hiveserver2-11-5.openstacklocal:8020/apps/hive/warehouse/test_text/.hive-staging_hive_2016-05-26_17-45-29_669_2888061873550824337-1/-ext-10000
> INFO  : Table default.test_text stats: [numFiles=1, numRows=1, totalSize=17, rawDataSize=16]
> No rows affected (6.849 seconds)
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> select * from test_text;
> +-------------------+--+
> |    test_text.c    |
> +-------------------+--+
> | horton works      |
> +-------------------+--+
> 1 row selected (0.098 seconds)
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> describe test_text;
> +-----------+------------+----------+--+
> | col_name  | data_type  | comment  |
> +-----------+------------+----------+--+
> | c         | char(16)   |          |
> +-----------+------------+----------+--+
> 1 row selected (0.127 seconds)
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> alter table test_text change column
c c string;
> No rows affected (0.145 seconds)
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> describe test_text;
> +-----------+------------+----------+--+
> | col_name  | data_type  | comment  |
> +-----------+------------+----------+--+
> | c         | string     |          |
> +-----------+------------+----------+--+
> 1 row selected (0.127 seconds)
> 0: jdbc:hive2://os-r6-ifsmes-hiveserver2-11-4> select * from test_text;
> +-------------------+--+
> |    test_text.c    |
> +-------------------+--+
> | horton works      |
> +-------------------+--+
> 1 row selected (0.066 seconds)
> {noformat}



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