[jira] [Updated] (DERBY-3651) Current DataTypeDescriptor.comparable() is subset of SQL spec. Enhance it to fully implement SQL spec

["Mamta A. Satoor (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DERBY-3651?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mamta A. Satoor updated DERBY-3651:
-----------------------------------

    Urgency: Normal
     Labels: derby_triage10_10  (was: )
    
> Current DataTypeDescriptor.comparable() is subset of SQL spec. Enhance it to fully implement SQL spec
> -----------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-3651
>                 URL: https://issues.apache.org/jira/browse/DERBY-3651
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Mamta A. Satoor
>              Labels: derby_triage10_10
>
> Collation functionality(DERBY-1478) 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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