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From "John Huss (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CAY-1863) Make determining whether a particular database type supports length adapter-specific not universal
Date Fri, 16 Aug 2013 20:57:50 GMT
John Huss created CAY-1863:
------------------------------

             Summary: Make determining whether a particular database type supports length
adapter-specific not universal
                 Key: CAY-1863
                 URL: https://issues.apache.org/jira/browse/CAY-1863
             Project: Cayenne
          Issue Type: Bug
          Components: Core Library
    Affects Versions: 3.2M1
            Reporter: John Huss
            Assignee: John Huss
            Priority: Minor


Database implementations vary in regard to which data types they allow a length to be specified
for.  So the static method TypesMapping.supportsLength should be deprecated and replaced by
an adapter-specific method that can be tweaked for each supported database.

The current implementation causes some bugs in particular with the MergerFactory which relies
on the global method TypesMapping.supportsLength when adding a new column to an existing table
or changing the datatype of an existing column.  The specified length may wrongly be ignored
in this case.

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