[teiid-issues] [JBoss JIRA] (TEIID-2564) Netezza queries returning "TEIID30328 Unable to evaluate A.IntKey: No value was available"

[Warren Gibson (JIRA)]

Warren Gibson created TEIID-2564:
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             Summary: Netezza queries returning "TEIID30328 Unable to evaluate A.IntKey: No value was available"
                 Key: TEIID-2564
                 URL: https://issues.jboss.org/browse/TEIID-2564
             Project: Teiid
          Issue Type: Bug
          Components: Query Engine
    Affects Versions: 8.4
            Reporter: Warren Gibson
            Assignee: Steven Hawkins


Netezza queries returning "TEIID30328 Unable to evaluate A.IntKey:
No value was available".  Queries involved all use HAVING.  
The log file is attached.  

A couple example queries are:

SELECT A.INTKEY, A.STRINGNUM FROM BQT1.SMALLA AS A WHERE CONVERT(LONGNUM,
STRING) = 8 GROUP BY A.INTKEY, A.STRINGNUM HAVING A.STRINGNUM = (SELECT
MAX(B.STRINGNUM) FROM BQT1.SMALLA AS B WHERE A.INTKEY = B.INTKEY

SELECT A.INTKEY, A.FLOATNUM FROM BQT1.SMALLA AS A WHERE NOT (A.INTNUM IS
NULL) GROUP BY A.INTKEY, A.FLOATNUM HAVING A.FLOATNUM = (SELECT
MIN(B.FLOATNUM) FROM BQT1.SMALLA AS B WHERE A.INTKEY = B.INTKEY

Analysis from engineering:
The issue is happening when a the subquery is converted to a join (this is happening under to covers based upon the costing of the subquery plan) and the correlated column is a grouping expression.

If the subplan is not converted to a join or the correlated column is not a grouping expression, then there is no issue.

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