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http://issues.apache.org/jira/browse/DERBY-2042?page=comments#action_12447503 ]
Knut Anders Hatlen commented on DERBY-2042:
-------------------------------------------
In the example that shows how to change the type of a column, is it really
necessary to rename c1 to c1_oldtype before it is dropped? Couldn't the example
be simplified to this:
* ALTER TABLE t ADD COLUMN c1_newtype NEWTYPE;
* UPDATE t SET c1_newtype = c1;
* ALTER TABLE t DROP COLUMN c1;
* ALTER TABLE t RENAME COLUMN c1_newtype to c1;
?
Also, would it be better if the example were in a code block rather than in a
list?
> Provide documentation for new RENAME COLUMN statement
> -----------------------------------------------------
>
> Key: DERBY-2042
> URL: http://issues.apache.org/jira/browse/DERBY-2042
> Project: Derby
> Issue Type: Improvement
> Components: Documentation
> Affects Versions: 10.3.0.0
> Reporter: Bryan Pendleton
> Assigned To: Bryan Pendleton
> Priority: Minor
> Attachments: renameColumnDoc_v1.diff,
> rrefsqljrenamecolumnstatement.html
>
>
> DERBY-1490 proposes to add a new RENAME COLUMN statement. Assuming that such
> a statement is added, we need to update the documentation to describe this
> new statement. DERBY-1490 describes the behavior of the statement in detail;
> this issue is just to track the documentation, which I intend to address
> separately after the DERBY-1490 changes are committed.
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