[teiid-issues] [JBoss JIRA] (TEIID-4316) Accumulo translator: null values not returned for <> criteria in WHERE clause

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-4316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-4316.
-----------------------------------
    Resolution: Rejected


Almost all sources should support three-valued null logic.  As Ramesh is showing with Postgresql, a comparison with null will evaluate to unknown, which will not pass as true in a where clause, thus no null rows.

> Accumulo translator: null values not returned for <> criteria in WHERE clause
> -----------------------------------------------------------------------------
>
>                 Key: TEIID-4316
>                 URL: https://issues.jboss.org/browse/TEIID-4316
>             Project: Teiid
>          Issue Type: Bug
>          Components: Misc. Connectors
>    Affects Versions: 8.12.5
>            Reporter: Jan Stastny
>            Assignee: Ramesh Reddy
>
> For columns, which contain some null values, a query like:
> {code:sql}
> SELECT nullable_column FROM table_name WHERE nullable_column <> some_value
> {code}
> doesn't return null values.
> Simple select works:
> {code:sql}
> SELECT nullable_column FROM table_name
> {code}
> returns all rows regardless whether they are null or not.
> IS NULL criteria in WHERE clause also work:
> {code:sql}
> SELECT nullable_column FROM table_name WHERE nullable_column IS NULL
> {code}
> returns correct number of null values.



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