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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-304) drop table command should not remove data files in default
Date Fri, 06 Dec 2013 12:29:36 GMT

    [ https://issues.apache.org/jira/browse/TAJO-304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13841221#comment-13841221
] 

Hudson commented on TAJO-304:
-----------------------------

FAILURE: Integrated in Tajo-trunk-postcommit #591 (See [https://builds.apache.org/job/Tajo-trunk-postcommit/591/])
TAJO-304: drop table command should not remove data files in default. (hyunsik) (hyunsik:
https://git-wip-us.apache.org/repos/asf?p=incubator-tajo.git&a=commit&h=c033d85cf065b9030e97e0b4c3596adacbbc255c)
* tajo-core/tajo-core-backend/src/test/java/org/apache/tajo/client/TestTajoClient.java
* tajo-core/tajo-core-backend/src/main/java/org/apache/tajo/engine/parser/HiveConverter.java
* tajo-core/tajo-core-backend/src/main/java/org/apache/tajo/cli/TajoCli.java
* tajo-core/tajo-core-backend/src/main/java/org/apache/tajo/master/TajoMasterClientService.java
* tajo-core/tajo-core-backend/src/main/java/org/apache/tajo/engine/planner/logical/DropTableNode.java
* CHANGES.txt
* tajo-core/tajo-core-backend/src/main/java/org/apache/tajo/engine/parser/SQLAnalyzer.java
* tajo-core/tajo-core-backend/src/main/antlr4/org/apache/tajo/engine/parser/SQLParser.g4
* tajo-core/tajo-core-backend/src/main/java/org/apache/tajo/engine/planner/LogicalPlanner.java
* tajo-core/tajo-core-backend/src/main/java/org/apache/tajo/master/GlobalEngine.java
* tajo-core/tajo-core-backend/src/main/proto/ClientProtos.proto
* tajo-core/tajo-core-backend/src/main/proto/TajoMasterClientProtocol.proto
* tajo-core/tajo-core-backend/src/main/antlr4/org/apache/tajo/engine/parser/SQLLexer.g4
* tajo-algebra/src/main/java/org/apache/tajo/algebra/DropTable.java
* tajo-core/tajo-core-backend/src/main/java/org/apache/tajo/client/TajoClient.java


> drop table command should not remove data files in default
> ----------------------------------------------------------
>
>                 Key: TAJO-304
>                 URL: https://issues.apache.org/jira/browse/TAJO-304
>             Project: Tajo
>          Issue Type: Improvement
>          Components: catalog, master
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
>             Fix For: 0.8-incubating
>
>         Attachments: TAJO-304.patch
>
>
> h3. Problem
> In the current implementation, Tajo removes a data directory when a user issues 'drop
table' command. But, it is very dangerous in many cases. For example, some users may lost
large data sets.
> h3. Solution
> In default, 'DROP TABLE' should not remove a data directory. -, and we need to add a
config property 'tajo.command.drop_table.data_removal' for those who want to change the behavior
of 'drop table'.- In addition, Tajo should provide 'DROP TABLE table_name PURGE'  for removing
all data.



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