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From Daniel Dai <da...@hortonworks.com>
Subject Re: Offsets in ORC files
Date Mon, 10 Feb 2014 20:41:20 GMT
Hi, Andrew,
Partition pruning for ORC is not addressed in PIG-3558. We will need
to do partition pruning for both ORC and Parquet in a new ticket.
Curently there is no interface to deal with this kind of pushdown
(LoadMetadata.setPartitionFilter push the filter to loader, but remove
the filter statement, for ORC/Parquet, filter is a hint, and we need
to do the filter again in Pig even it is pushed to loader), we will
need to define a new interface for that. You are welcome to initiate
the work. I know Aniket is also interested in doing that, so be sure
the talk with him about this work.


On Mon, Feb 10, 2014 at 11:42 AM, Andrew Musselman
<andrew.musselman@gmail.com> wrote:
> I had a chat with a couple people last week about a feature request for
> Pig:  in a "where" or "filter" clause, when loading an ORC file, to skip
> directly to the right offset instead of scanning the whole file.
> I found this one to add loading and storing of ORC files:
> https://issues.apache.org/jira/browse/PIG-3558
> But is there a ticket for what I'm asking about?  Seems like a good
> improvement, and I'd be happy to take it on if I can.
> Best
> Andrew

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