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From "Mamta A. Satoor (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-3651) Current DataTypeDescriptor.comparable() is subset of SQL spec. Enhance it to fully implement SQL spec
Date Tue, 29 Apr 2008 18:11:56 GMT
Current DataTypeDescriptor.comparable() is subset of SQL spec. Enhance it to fully implement
SQL spec
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                 Key: DERBY-3651
                 URL: https://issues.apache.org/jira/browse/DERBY-3651
             Project: Derby
          Issue Type: Improvement
          Components: SQL
            Reporter: Mamta A. Satoor


Collation functionality was implemented in 10.3 The functionality in 10.3 and 10.4 currently
has DataTypeDescriptor.comparable() implement subset of SQL standard. More info on this can
be found in DERBY-2876 and other related task is DERBY-2875.

The current implementation of comparable requires that collation type *and* derivation must
match for the types to be comparable. According to SQL Standard 9.13, e.g. with non-matching
types and one derivation of implicit and one of none, then the types are comparable.

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