[ http://issues.apache.org/jira/browse/DERBY-1490?page=all ]
Bryan Pendleton updated DERBY-1490:
-----------------------------------
Attachment: derby1490_v1_needMoreTests.diff
Thanks Edson and Wolf for the suggestions on possible syntax. I see that
Postgres and Oracle appear to implement ALTER TABLE t RENAME COLUMN c TO new_c
while DB2 appears to implement RENAME COLUMN t.c to new_c
I think that in the future it would be possible to support multiple syntax
variants. For
now I have concentrated just on implementing the ALTER TABLE syntax as it is
the least amount of work.
Attached is a not-ready-for-commit patch proposal
'derby1490_v1_needMoretests.diff'.
This patch modifies the parser to support the new syntax
ALTER TABLE t RENAME COLUMN c TO new_c
and
ALTER TABLE t RENAME TABLE t TO new_t
The patch also contains a handful of tests, to demonstrate the most rudimentary
aspects of the new command.
I intend to write additional tests later and propose a replacement patch, but I
would
like to hear any feedback on this patch, too!
> 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.
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