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From "Tom White (JIRA)" <>
Subject [jira] [Commented] (CRUNCH-299) Support predicate pushdown for Parquet sources
Date Fri, 22 Nov 2013 09:24:36 GMT


Tom White commented on CRUNCH-299:

Column projection is already supported. This change is to use Parquet's filtering (see an
example here:
However I'm not sure how easy it would be to translate a FilterFn into ColumnRecordFilter,
since the former operates on the in-memory object while the latter operates on the column
values, and so it's not clear to me if we can avoid the deserialization step.

> Support predicate pushdown for Parquet sources
> ----------------------------------------------
>                 Key: CRUNCH-299
>                 URL:
>             Project: Crunch
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Tom White
>            Assignee: Josh Wills
> We should be able to push Crunch FilterFn down to a Parquet ColumnRecordFilter. 

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