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https://issues.apache.org/jira/browse/OPTIQ-292?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde resolved OPTIQ-292.
-------------------------------
Resolution: Fixed
Fixed in
https://github.com/julianhyde/optiq/commit/90d0d79ec253af65c0c06323f43a90a672e0e73f.
> Improve windowed aggregate return types
> ---------------------------------------
>
> Key: OPTIQ-292
> URL: https://issues.apache.org/jira/browse/OPTIQ-292
> Project: optiq
> Issue Type: Bug
> Reporter: GitHub Import
> Labels: github-import
>
> Optiq currently makes all windowed aggregate functions nullable, but that is
> invalid. In many cases they will be `NOT NULL`.
> For example:
> * `RANK() OVER w` is not nullable;
> * `FIRST_VALUE(deptno) OVER w` is nullable if and only if `deptno` is
> nullable;
> * `SUM(x) OVER w` is nullable iff x is nullable or w may be empty.
> ---------------- Imported from GitHub ----------------
> Url: https://github.com/julianhyde/optiq/issues/292
> Created by: [julianhyde|https://github.com/julianhyde]
> Labels:
> Created at: Tue May 27 21:09:38 CEST 2014
> State: open
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