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From "Eranda Sooriyabandara (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-4256) allow alter table to increase the maximum size of a blob and a clob.
Date Wed, 29 Jul 2009 07:06:14 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4256?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eranda Sooriyabandara updated DERBY-4256:
-----------------------------------------

    Attachment: derby4256.diff

Hi Bryan,
I made some changes to the code as,
if (!(typeName.equals(TypeId.VARCHAR_NAME)) &&
!(typeName.equals(TypeId.VARBIT_NAME))&&!(typeName.equals(TypeId.BLOB_NAME)))
{
throw StandardException.newException(
 SQLState.LANG_MODIFY_COLUMN_INVALID_TYPE);
}


and this succeed the test

ij version 10.6

ij> connect 'jdbc:derby:testdb;create=true';

ij> create table binarydata(c1 int,data blob(64));

0 rows inserted/updated/deleted

ij> ALTER TABLE binarydata ALTER COLUMN data SET DATA TYPE blob(256M);

0 rows inserted/updated/deleted
Here I am attaching the patch file with this.


> allow alter table to increase the maximum size of a blob and a clob.
> --------------------------------------------------------------------
>
>                 Key: DERBY-4256
>                 URL: https://issues.apache.org/jira/browse/DERBY-4256
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 10.5.1.1
>            Reporter: Mike Matrigali
>            Assignee: Eranda Sooriyabandara
>            Priority: Minor
>         Attachments: derby4256.diff
>
>
> Allow new syntax that allows user to alter the maximum length of a blob and/or clob column:
> ALTER TABLE binarydata ALTER COLUMN data SET DATA TYPE blob(128M)
> The syntax should match up with the existing functionality to increase the size of varchar
fields.

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