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From "Bryan Pendleton (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-1489) Provide ALTER TABLE DROP COLUMN functionality
Date Fri, 25 Aug 2006 17:05:23 GMT
    [ http://issues.apache.org/jira/browse/DERBY-1489?page=comments#action_12430541 ] 
            
Bryan Pendleton commented on DERBY-1489:
----------------------------------------

The only two places where DependencyManager.DROP_COLUMN appears
to be used right now are:
  java/engine/org/apache/derby/impl/sql/execute/AlterTableConstantAction.java
  java/engine/org/apache/derby/iapi/sql/dictionary/SPSDescriptor.java

Hopefully this means that the impact of creating a new DROP_COLUMN_RESTRICT
would be confined to these two places (plus ViewDescriptor.java).

> 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, 10.2.1.0, 10.1.2.1, 10.1.3.0, 10.1.3.1
>            Reporter: Bryan Pendleton
>         Assigned To: Bryan Pendleton
>         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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