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From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PHOENIX-1016) Support MINVALUE, MAXVALUE, and CYCLE options in CREATE SEQUENCE
Date Tue, 03 Jun 2014 01:12:01 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-1016?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

James Taylor updated PHOENIX-1016:
----------------------------------

    Assignee: Thomas D'Silva

> Support MINVALUE, MAXVALUE, and CYCLE options in CREATE SEQUENCE
> ----------------------------------------------------------------
>
>                 Key: PHOENIX-1016
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-1016
>             Project: Phoenix
>          Issue Type: Bug
>            Reporter: James Taylor
>            Assignee: Thomas D'Silva
>
> We currently don't support MINVALUE, MAXVALUE, and CYCLE options in CREATE SEQUENCE,
but we should. See http://msdn.microsoft.com/en-us/library/ff878091.aspx for the syntax.
> I believe MINVALUE applies if the INCREMENT is negative while MAXVALUE applies otherwise.
If the value of a sequence goes beyond MINVALUE/MAXVALUE, then:
> - if CYCLE is true, then the sequence value should start again at the START WITH value
(or the MINVALUE if specified too? Not sure about this).
> - if CYCLE is false, then an exception should be thrown.
> To implement this:
> - make the grammar changes in PhoenixSQL.g
> - add member variables for MINVALUE, MAXVALUE, and CYCLE to CreateSequenceStatement
> - add the appropriate error checking and handle bind variables for these new options
in CreateSequenceCompiler
> - modify the MetaDataClient.createSequence() call by passing along these new parameters.
> - same for ConnectionQueryServices.createSequence() call
> - same for Sequence.createSequence().
> - pass along these parameters as new KeyValues in the Append that constitutes the RPC
call
> - act on these in the SequenceRegionObserver coprocessor as indicated above.



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