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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-3398) Support min/max values for Java types float/double in real/double columns
Date Wed, 13 Feb 2013 10:18:13 GMT

    [ https://issues.apache.org/jira/browse/DERBY-3398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13577466#comment-13577466
] 

Knut Anders Hatlen commented on DERBY-3398:
-------------------------------------------

In the cases where we don't have a language connection context (updateXXX() and setXXX())
the values will be checked in a later step (updateRow() and execute()), so we still won't
be able to insert illegal values if we skip the range check in soft upgrade mode when the
language connection context is not available. That wouldn't be too bad, I think. In fact,
that's consistent with how the range checking is done in the client driver. It too defers
range checking till updateRow() or execute().
                
> Support min/max values for Java types float/double in real/double columns
> -------------------------------------------------------------------------
>
>                 Key: DERBY-3398
>                 URL: https://issues.apache.org/jira/browse/DERBY-3398
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 10.4.1.3
>            Reporter: Knut Anders Hatlen
>            Priority: Minor
>              Labels: derby_triage10_10
>         Attachments: derby-3398-2.diff, derby-3398-3.diff, derby-3398-3.stat, derby-3398-4.diff,
derby-3398.diff, derby-3398.status
>
>
> Derby doesn't support the entire range of valid (finite) values of the Java primitive
types double/float in columns with SQL type DOUBLE or REAL. This appears to be a limitation
that was introduced for compatibility with DB2. There have been some requests on derby-user
that we lift this restriction.
> The restriction is enforced by the methods normalizeREAL() and normalizeDOUBLE() in org.apache.derby.iapi.types.NumberDataType.

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