[ http://issues.apache.org/jira/browse/DERBY-1490?page=comments#action_12443162 ] Bryan Pendleton commented on DERBY-1490: ----------------------------------------
I had overlooked that Derby already supports a RENAME TABLE and RENAME INDEX statement. Given that, I think the idea of providing a RENAME COLUMN statement makes a lot of sense. I shall investigate a possible RENAME COLUMN statement further. I can see that it might make sense to provide both syntaxes for renaming a column, but I can also see that one syntax is probably plenty, so if we provide a RENAME COLUMN statement there may be no point to having an ALTER TABLE t RENAME COLUMN c TO new_c statement. Also, I'm not sure if there is any purpose in providing support for ALTER TABLE t RENAME TABLE t TO new_t. That syntax seems rather awkward, and given that there is already a RENAME TABLE statement, I'm not sure that there is any benefit to providing ALTER TABLE syntax which merely duplicates it. So I think that part of my first patch makes no sense and should be withdrawn. I'll be back with a new patch proposal after thinking about this some more... > Provide ALTER TABLE RENAME COLUMN functionality > ----------------------------------------------- > > Key: DERBY-1490 > URL: http://issues.apache.org/jira/browse/DERBY-1490 > Project: Derby > Issue Type: New Feature > Components: Documentation, SQL > Affects Versions: 10.0.2.0, 10.0.2.1, 10.1.1.0, 10.2.1.6, 10.1.2.1, > 10.1.3.1 > Reporter: Bryan Pendleton > Assigned To: Bryan Pendleton > Attachments: derby1490_v1_needMoreTests.diff > > > Provide a way to rename a column in an existing table. Possible syntax could > be: > ALTER TABLE tablename RENAME COLUMN oldcolumn TO newcolumn; > Feature should properly handle the possibility that the column is currently > used in constraints, views, indexes, triggers, etc. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
