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From "Rick Hillegas (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-1489) Provide ALTER TABLE DROP COLUMN functionality
Date Tue, 01 Aug 2006 13:43:15 GMT
    [ http://issues.apache.org/jira/browse/DERBY-1489?page=comments#action_12424863 ] 
            
Rick Hillegas commented on DERBY-1489:
--------------------------------------

Hi Bryan: Thanks for this great feature. The parser changes look good: thanks for cleaning
up the LOOKAHEADs in alterTableAction().

1) I agree that it would be good to see some tests verifying that privilege descriptors are
cleaned up.

2) I'm curious about why ALTER TABLE DROP COLUMN CASCADE fails if a view mentions the column.
From your comment in altertable.sql, it seems that this puzzles you too. It does look wrong
to me.

> Provide ALTER TABLE DROP COLUMN functionality
> ---------------------------------------------
>
>                 Key: DERBY-1489
>                 URL: http://issues.apache.org/jira/browse/DERBY-1489
>             Project: Derby
>          Issue Type: New Feature
>          Components: Documentation, SQL
>    Affects Versions: 10.0.2.0, 10.0.2.1, 10.1.1.0, 10.2.0.0, 10.1.2.1, 10.1.3.0, 10.1.3.1
>            Reporter: Bryan Pendleton
>         Assigned To: Bryan Pendleton
>             Fix For: 10.2.0.0
>
>         Attachments: dropColumn_2.diff
>
>
> Provide a way to drop a column from an existing table. Possible syntax would be:
>   ALTER TABLE tablename DROP COLUMN columnname CASCADE / RESTRICT;
> Feature should properly handle columns which are used in constraints, views, triggers,
indexes, etc.

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