[teiid-issues] [JBoss JIRA] (TEIID-2571) Generally allow must pushdown function evaluation

[Steven Hawkins (JIRA)]

Steven Hawkins created TEIID-2571:
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             Summary: Generally allow must pushdown function evaluation
                 Key: TEIID-2571
                 URL: https://issues.jboss.org/browse/TEIID-2571
             Project: Teiid
          Issue Type: Enhancement
          Components: Connector API, Query Engine
            Reporter: Steven Hawkins
            Assignee: Steven Hawkins
             Fix For: 8.5


A must pushdown function not associated with an access node will fail to evaluate.  We can initially improve upon this with translator that support "select without from" to issue a scalar select of the value.

We can also enhance planning to group all such accesses to prevent multiple calls and to determine a possible source target if the function is not associated with a source schema.

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