[teiid-issues] [JBoss JIRA] (TEIID-2626) If a column type is not set, null values will be written into persisted batches

[Johnathon Lee (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-2626?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Johnathon Lee reopened TEIID-2626:
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re-open to assign Fix Version
                
> If a column type is not set, null values will be written into persisted batches
> -------------------------------------------------------------------------------
>
>                 Key: TEIID-2626
>                 URL: https://issues.jboss.org/browse/TEIID-2626
>             Project: Teiid
>          Issue Type: Bug
>          Components: Query Engine
>    Affects Versions: 7.5
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>            Priority: Blocker
>             Fix For: 8.4.1, 8.5
>
>
> The buffer manager will choose the null serializer if a column type is not set.  This is not expected to happen, but test code can be sloppy which isn't evident if the weak reference cache is working effectively.
> However there is one place in the code that is effected, which is the internally generated partitionId column on any window function expression with a non-empty over clause.  This means that on systems with limited memory and or poor performing weak references no results for the window function may be returned.

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