[teiid-issues] [JBoss JIRA] (TEIID-5477) Incorrect results with lead/lag over windows with duplicates

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-5477?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins updated TEIID-5477:
----------------------------------
    Description: 
LEAD/LAG should be computed as row values functions, rather than over a range.

for example:

select e1, lead(e1, 2) over (order by e1 nulls last) from pm1.g1

returns three rows of ('a', 'c') - rather than the expected ('a', 'a'), ('a', 'b'), ('a', 'c')


  was:
LEAD/LAG should be computed as row values functions, rather than over a range.

for example:

select e1, lead(e1, 2) over (order by e1 nulls last) from pm1.g1

returns three rows of ('a', 'a') - rather than the expected ('a', 'a'), ('a', 'b'), ('a', 'c')




> Incorrect results with lead/lag over windows with duplicates
> ------------------------------------------------------------
>
>                 Key: TEIID-5477
>                 URL: https://issues.jboss.org/browse/TEIID-5477
>             Project: Teiid
>          Issue Type: Bug
>          Components: Query Engine
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>             Fix For: 11.2, 11.1.1, 11.0.3, 10.3.5
>
>
> LEAD/LAG should be computed as row values functions, rather than over a range.
> for example:
> select e1, lead(e1, 2) over (order by e1 nulls last) from pm1.g1
> returns three rows of ('a', 'c') - rather than the expected ('a', 'a'), ('a', 'b'), ('a', 'c')



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