[teiid-issues] [JBoss JIRA] (TEIID-2422) Offer support for a timestampdiff based upon calendar fields

[Steven Hawkins (JIRA)]

Steven Hawkins created TEIID-2422:
-------------------------------------

             Summary: Offer support for a timestampdiff based upon calendar fields
                 Key: TEIID-2422
                 URL: https://issues.jboss.org/browse/TEIID-2422
             Project: Teiid
          Issue Type: Quality Risk
          Components: Query Engine
            Reporter: Steven Hawkins
            Assignee: Steven Hawkins


There is little consistency among timestampdiff implementations, however ours seems to be based off of the db2 (http://pic.dhe.ibm.com/infocenter/dzichelp/v2r2/topic/com.ibm.db2z9.doc.sqlref/src/tpc/db2z_bif_timestampdiff.htm) timestampdiff in terms of intervals - but does not make all the same assumptions in the calculation of the answer.

It would be good to provide an option so that our timestampdiff or another system function would calculate differences based upon calendar fields (following the behavior of SQL Server) rather than just based upon the interval - for example the months between 2012-02-20 and 2012-03-01 would report 1 rather than the current answer of 0).

There is also a general issue with the consistency of the results with the pushdowned versions of timestampdiff as vendor support varies.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira