[teiid-issues] [JBoss JIRA] (TEIID-4685) PrestoDB translator - COALESCE is translated as NULLIF

[Juraj Duráni (JIRA)]

Juraj Duráni created TEIID-4685:
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             Summary: PrestoDB translator - COALESCE is translated as NULLIF
                 Key: TEIID-4685
                 URL: https://issues.jboss.org/browse/TEIID-4685
             Project: Teiid
          Issue Type: Bug
          Components: Query Engine
    Affects Versions: 8.12.8.6_3
            Reporter: Juraj Duráni
            Assignee: Steven Hawkins


Teiid translates *COALESCE* function to *nullif*. However, those functions have different functionality. PrestoDB contains *coalesce* function. Please correct the function alias.

{code:sql|title=Query}
SELECT COALESCE(intnum, intkey) FROM BQT1.SmallA
{code}
{code:sql|title=Source command}
SELECT nullif(g_0.intnum, g_0.intkey) FROM smalla AS g_0
{code}



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