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From "Fanhong Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-5317) Implement insert, update, and delete in Hive with full ACID support
Date Thu, 12 Mar 2015 04:28:39 GMT

    [ https://issues.apache.org/jira/browse/HIVE-5317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14358084#comment-14358084
] 

Fanhong Li commented on HIVE-5317:
----------------------------------

insert into table values() when UTF-8 character is not correct



insert into table test_acid partition(pt='pt_2')
 values( 2, '中文_2' , 'city_2' )
 ;

hive> select *
 > from test_acid 
 > ;
 OK
 2 -�_2 city_2 pt_2
 Time taken: 0.237 seconds, Fetched: 1 row(s)
 hive> 

CREATE TABLE test_acid(id INT, 
 name STRING, 
 city STRING) 
 PARTITIONED BY (pt STRING)
 clustered by (id) into 1 buckets
 stored as ORCFILE
 TBLPROPERTIES('transactional'='true')
 ;


> Implement insert, update, and delete in Hive with full ACID support
> -------------------------------------------------------------------
>
>                 Key: HIVE-5317
>                 URL: https://issues.apache.org/jira/browse/HIVE-5317
>             Project: Hive
>          Issue Type: New Feature
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>             Fix For: 0.14.0
>
>         Attachments: InsertUpdatesinHive.pdf
>
>
> Many customers want to be able to insert, update and delete rows from Hive tables with
full ACID support. The use cases are varied, but the form of the queries that should be supported
are:
> * INSERT INTO tbl SELECT …
> * INSERT INTO tbl VALUES ...
> * UPDATE tbl SET … WHERE …
> * DELETE FROM tbl WHERE …
> * MERGE INTO tbl USING src ON … WHEN MATCHED THEN ... WHEN NOT MATCHED THEN ...
> * SET TRANSACTION LEVEL …
> * BEGIN/END TRANSACTION
> Use Cases
> * Once an hour, a set of inserts and updates (up to 500k rows) for various dimension
tables (eg. customer, inventory, stores) needs to be processed. The dimension tables have
primary keys and are typically bucketed and sorted on those keys.
> * Once a day a small set (up to 100k rows) of records need to be deleted for regulatory
compliance.
> * Once an hour a log of transactions is exported from a RDBS and the fact tables need
to be updated (up to 1m rows)  to reflect the new data. The transactions are a combination
of inserts, updates, and deletes. The table is partitioned and bucketed.



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