You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@pig.apache.org by "Olga Natkovich (JIRA)" <ji...@apache.org> on 2011/03/03 02:27:36 UTC
[jira] Updated: (PIG-1324) Logical Optimizer: Nested column pruning
[ https://issues.apache.org/jira/browse/PIG-1324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Olga Natkovich updated PIG-1324:
--------------------------------
Fix Version/s: 0.10
> Logical Optimizer: Nested column pruning
> ----------------------------------------
>
> Key: PIG-1324
> URL: https://issues.apache.org/jira/browse/PIG-1324
> Project: Pig
> Issue Type: Sub-task
> Components: impl
> Affects Versions: 0.7.0
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Fix For: 0.10
>
>
> Currently, column pruning does not prune sub-fields inside a complex data-type. For example:
> A = load '1.txt' as (a0, a1, a2);
> B = group A by a0;
> C = foreach B generate group, SUM(A.a1);
> Currently, since we group A as a bag, and some part of the bag is used in the following statement, so none of the fields inside A can be pruned. We shall keep track of sub-fields and figure out a2 is not actually needed.
--
This message is automatically generated by JIRA.
-
For more information on JIRA, see: http://www.atlassian.com/software/jira