pig-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Aaron Kimball (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1229) allow pig to write output into a JDBC db
Date Tue, 03 Aug 2010 18:26:19 GMT

    [ https://issues.apache.org/jira/browse/PIG-1229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12894975#action_12894975
] 

Aaron Kimball commented on PIG-1229:
------------------------------------

Haven't looked at how you're using hsqldb in this patch, but I've got a lot of experience
using HSQLDB for testing.

If you're running one or more tests in a single process that requires an HSQLDB-backed database,
you do not need to create a new instance of Server. You can just set your JDBC connect string
to {{jdbc:hsqldb:mem:foodbname}} and get a {{Connection}} instance to a memory-backed single-process
database called {{foodbname}}. This database will exist for the lifetime of the Java process.
You can have multiple {{Connection}} instances (concurrently or serially) open to this database
and it will function like you expect a database to work like. The advantage of not using a
server is that this does not require binding a port; therefore you can run multiple tests
concurrently without worrying about collisions. Similarly, there's no need to use the {{jdbc:hsqldb:file}}
protocol unless you want to restore the contents of the database in a subsequent process.
When your Java process ends, you won't have a bonus file to clean up with {{jdbc:hsqldb:mem}}.

Of course, if you're testing with {{MiniMRCluster}} or something, you'll want to start a Server
so that the external mapper processes can connect to the same database via {{jdbc:hsqldb:hsql://server:port/dbname}}.




> allow pig to write output into a JDBC db
> ----------------------------------------
>
>                 Key: PIG-1229
>                 URL: https://issues.apache.org/jira/browse/PIG-1229
>             Project: Pig
>          Issue Type: New Feature
>          Components: impl
>            Reporter: Ian Holsman
>            Assignee: Ankur
>            Priority: Minor
>             Fix For: 0.8.0
>
>         Attachments: jira-1229-final.patch, jira-1229-final.test-fix.patch, jira-1229-v2.patch,
jira-1229-v3.patch, pig-1229.2.patch, pig-1229.patch
>
>
> UDF to store data into a DB

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message