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https://issues.apache.org/jira/browse/HIVE-627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12730758#action_12730758
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He Yongqiang commented on HIVE-627:
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So this issue intends to remove all the usages of RowResolver after compile
finished? And let the optimizers do not use row resovler any more?
RowResolver is not only used in cp, but also used in ppd. Do we need to remove
them all?
> Optimizer should only access RowSchema (and not RowResolver)
> ------------------------------------------------------------
>
> Key: HIVE-627
> URL: https://issues.apache.org/jira/browse/HIVE-627
> Project: Hadoop Hive
> Issue Type: Improvement
> Reporter: Zheng Shao
>
> The column pruner is accessing RowResolver a lot of times, for things like
> reverseLookup, and get(alias, column).
> These are not necessary - we should not need to translate an internal name to
> (alias, column) and then translate back. We should be able to use internal
> name from one operator to the other, using RowSchema.
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