Oracle Connector is not producing the correct queries when using a
LIMIT clause
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Key: TEIID-756
URL:
https://jira.jboss.org/browse/TEIID-756
Project: Teiid
Issue Type: Bug
Components: JDBC Connector
Affects Versions: 6.0.0, 6.1.0, 6.2.0
Reporter: Larry O'Leary
Assignee: Steven Hawkins
When using a LIMIT clause in a query, the Oracle Connector rewrites it to something that
Oracle will understand. The problem is that the rewritten version of the query is not
returning the expected results.
For example:
SELECT INTKEY FROM BQT1.MEDIUMA LIMIT 50, 100
Should return 50 rows starting at row 100 but instead returns 0 rows when executed via
the Oracle Connector. Currently the above query is rewritten as:
SELECT * FROM (SELECT VIEW_FOR_LIMIT.*, ROWNUM ROWNUM_ FROM (SELECT MediumA.IntKey FROM
MediumA) VIEW_FOR_LIMIT WHERE ROWNUM <= 150) WHERE ROWNUM_ > 50
Further more, the rewritten version of the query is also projecting a column named
ROWNUM_ which would be invalid based on our query processing.
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