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Posted to issues@tajo.apache.org by "Hyunsik Choi (JIRA)" <ji...@apache.org> on 2014/02/13 14:14:19 UTC
[jira] [Commented] (TAJO-595) The same expressions without
different alias are not allowed.
[ https://issues.apache.org/jira/browse/TAJO-595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13900302#comment-13900302 ]
Hyunsik Choi commented on TAJO-595:
-----------------------------------
Created a review request against branch master in reviewboard
https://reviews.apache.org/r/18075/
> The same expressions without different alias are not allowed.
> -------------------------------------------------------------
>
> Key: TAJO-595
> URL: https://issues.apache.org/jira/browse/TAJO-595
> Project: Tajo
> Issue Type: Bug
> Components: planner/optimizer
> Reporter: Hyunsik Choi
> Assignee: Hyunsik Choi
> Fix For: 0.8-incubating
>
> Attachments: TAJO-595.patch
>
>
> Currently, LogicalPlanner and ProjectionPushDownRule do not allow the same expressions with different alias names. The following query is an example of this restriction.
> {code}
> select l_orderkey + 1 as total1, orderkey + 1 as total2 from ..
> {code}
> The main cause of this bug is that NamedExprManager and TargetListManager only keep 1:1 mapping relationship between alias and expression. This patch changes them to keep 1:N mapping relationship.
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