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https://issues.apache.org/jira/browse/TAJO-774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14038182#comment-14038182
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ASF GitHub Bot commented on TAJO-774:
-------------------------------------
Github user hyunsik commented on the pull request:
https://github.com/apache/tajo/pull/13#issuecomment-46634343
@jihoonson They also have restrictions. Please take a look at the below
description of the link as follows:
```
Restrictions are that frame_start cannot be UNBOUNDED FOLLOWING, frame_end
cannot be UNBOUNDED PRECEDING, and the frame_end choice cannot appear earlier
in the above list than the frame_start choice — for example RANGE BETWEEN
CURRENT ROW AND value PRECEDING is not allowed.
```
The main difference is that we have the restrictions in parser level, yet
PostgreSQL has the same restrictions in the planner level.
> Implement logical plan part and physical executor for window function.
> ----------------------------------------------------------------------
>
> Key: TAJO-774
> URL: https://issues.apache.org/jira/browse/TAJO-774
> Project: Tajo
> Issue Type: Sub-task
> Components: planner/optimizer
> Reporter: Hyunsik Choi
> Assignee: Hyunsik Choi
> Fix For: 0.9.0
>
>
> See the title. The main objective of this issue is to implement the logical
> planning part for window function support.
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