[teiid-issues] [JBoss JIRA] (TEIID-5472) Clean up window function project node implementation

[Steven Hawkins (Jira)]

     [ https://issues.jboss.org/browse/TEIID-5472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-5472.
-----------------------------------
    Resolution: Done


Marking as resolved until there is an impetus to revisit.  The three remaining items are:

- moving any of the aggregate value computation onto the aggregate classes, which can be done for lead/lag and the distribution functions by using the frame based logic.  That however comes at a performance cost
- adding or changing the logic to work over the specification sorts such that we can immediately output the row results, rather than rebuilding by iterating over the input again.  
- Remove the specification distinction between row/range processing so that they can be computed together for the same specification

> Clean up window function project node implementation
> ----------------------------------------------------
>
>                 Key: TEIID-5472
>                 URL: https://issues.jboss.org/browse/TEIID-5472
>             Project: Teiid
>          Issue Type: Quality Risk
>          Components: Query Engine
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>            Priority: Major
>             Fix For: 11.2
>
>
> The initial implementation of window functions did not allow for a frame clause and specifically separated the logic of creating row and range values.  Now that the logic is more complete we should remove some of the initial design aspects.



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