[ http://issues.apache.org/jira/browse/DERBY-1490?page=comments#action_12447318 ] Rajesh Kartha commented on DERBY-1490: --------------------------------------
The latest patch applied successfully. An initial observations: Rename column of a non-existent table throws an ' ALTER TABLE" error: ij> create table btab (i int, j varchar(100)); 0 rows inserted/updated/deleted ij> rename column btab1.i to id; ERROR 42Y55: 'ALTER TABLE' cannot be performed on 'BTAB1' because it does not exist. I would expect this to be consistent to following ij> rename table abcd to bcd; ERROR 42Y55: 'RENAME TABLE' cannot be performed on 'ABCD' because it does not exist. Will try out some other scenarios and provide further comments for the new patch. Meanwhile, I was thinking: Like 'RENAME COLUMN" isn't 'RENAME CONSTRAINT' a good feature to have in Derby ? Currently it is a two step process: - ALTER TABLE DROP CONSTRAINT - ALTER TABLE ADD CONSTRAINT With a 'RENAME CONSTRAINT' this can be done in a single step. Maybe I will open a JIRA enhancement request to track this. -Rajesh > 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: 1490_cannot_patch.jpg, derby1490_v1_needMoreTests.diff, > renameColumn_v2_with_tests.diff, renameColumn_v3_after_review.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
