[teiid-issues] [JBoss JIRA] Created: (TEIID-1374) Nested correlated reference issue with rewritten queries

Tue Nov 23 14:50:59 EST 2010

Nested correlated reference issue with rewritten queries
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                 Key: TEIID-1374
                 URL: https://jira.jboss.org/browse/TEIID-1374
             Project: Teiid
          Issue Type: Bug
          Components: Query Engine
    Affects Versions: 7.0
            Reporter: Steven Hawkins
            Assignee: Steven Hawkins

In a query such as "select * from bqt1.smalla where exists (select intnum from bqt1.smalla x where smalla.intnum = x.intnum and exists (select intnum from bqt1.smalla where exists (select intnum from bqt1.smalla x where smalla.intnum = x.intnum)))" we will inappropriately report that the top exists subquery has 2 correlated references since we see the more deeply nested smalla.intnum also.

This is generally not a issue, it can introduce errors in places where subqueries are rewritten, such as with subquery optimization or inherently updatable view queries.

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