[jira] [Commented] (HIVE-12645) ConstantPropagateProcCtx.resolve() should verify internal names in addition to alias to match 2 columns from different row schemas

["Ashutosh Chauhan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-12645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15086694#comment-15086694 ] 

Ashutosh Chauhan commented on HIVE-12645:
-----------------------------------------

+1 pending tests

> ConstantPropagateProcCtx.resolve() should verify internal names in addition to alias to match 2 columns from different row schemas 
> -----------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-12645
>                 URL: https://issues.apache.org/jira/browse/HIVE-12645
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Hari Sankar Sivarama Subramaniyan
>            Assignee: Hari Sankar Sivarama Subramaniyan
>         Attachments: HIVE-12645.1.patch, HIVE-12645.2.patch, HIVE-12645.3.patch, HIVE-12645.4.patch
>
>
> Currently, it seems that we look to match the ColumnInfo between the parent and the child rowschemas by calling rci = rs.getColumnInfo(tblAlias, alias) which might be a bit aggressive. i.e. we will lose opportunity to constant propogate even if the columns are the same but the alias in the rowschemas do not match. We need to introduce additional checks to see if the columns can be mapped to constants from parents.



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