I would like to extend the HiveColumnarRC Reader in such a way that it can tell
Pig to only use a certain group of files, i.e. I want to filter the files and
have Pig only use these for calculating the amount of tasks to run. I'll
appreciate if anybody can point me in the right direction.
From: Gerrit Jansen van Vuuren (JIRA) [mailto:j...@apache.org]
Sent: 03 December 2009 16:03
Subject: [jira] Updated: (PIG-1117) Pig reading hive columnar rc tables
Gerrit Jansen van Vuuren updated PIG-1117:
Pig Storage Loader for reading from HiveColumnarRC Files
> Pig reading hive columnar rc tables
> Key: PIG-1117
> URL: https://issues.apache.org/jira/browse/PIG-1117
> Project: Pig
> Issue Type: New Feature
> Reporter: Gerrit Jansen van Vuuren
> Attachments: HiveColumnarLoader.patch, HiveColumnarLoaderTest.patch
> I've coded a LoadFunc implementation that can read from Hive Columnar RC
> tables, this is needed for a project that I'm working on because all our data
> is stored using the Hive thrift serialized Columnar RC format. I have looked
> at the piggy bank but did not find any implementation that could do this.
> We've been running it on our cluster for the last week and have worked out
> most bugs.
> There are still some improvements to be done but I would need like setting
> the amount of mappers based on date partitioning. Its been optimized so as to
> read only specific columns and can churn through a data set almost 8 times
> faster with this improvement because not all column data is read.
> I would like to contribute the class to the piggybank can you guide me in
> what I need to do?
> I've used hive specific classes to implement this, is it possible to add this
> to the piggy bank build ivy for automatic download of the dependencies?
This message is automatically generated by JIRA.
You can reply to this email to add a comment to the issue online.