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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-4611) Add new datatypes: TIME WITH TIMEZONE and TIMESTAMP WITH TIMEZONE
Date Sat, 10 Apr 2010 15:25:40 GMT

                 Key: DERBY-4611
                 URL: https://issues.apache.org/jira/browse/DERBY-4611
             Project: Derby
          Issue Type: Improvement
          Components: SQL
            Reporter: Rick Hillegas

The SQL Standard defines two timezone-stamped datatypes: TIME WITH TIMEZONE and TIMESTAMP
WITH TIMEZONE. Relevant sections in part 2 of the Standard include 4.6 (Datetimes and intervals),
6.1 (<data type>), 6.12 (<cast specification>), and 8.2 (<comparison predicate>).

I think that we could implement these two datatypes today. Note that there is a general cleanup
of the Java datetime classes underway in JSR 310 ( https://jsr-310.dev.java net/ ), which
is supposed to be delivered in Java 7. It's possible that the next rev of JDBC will provide
better support for these datatypes. However, there is currently no JSR covering the next JDBC

For the moment, the existing JDBC TIME and TIMESTAMP types would have to be overloaded to
cover the new datatypes. Disambiguating the WITH TIMEZONE variants might have to be accomplished
by parsing the type names returned by ResultSetMetaData.getColumnTypeName() and DatabaseMetaData.getColumns().TYPE_NAME.

Note also that DRDA does not provide WITH TIMEZONE variants of its TIME and TIMEZONE types.
Some creativity would be required here too.

Users are welcome to vote for this issue in order to boost its chance of being addressed.

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