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https://issues.apache.org/jira/browse/DERBY-6644?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen updated DERBY-6644:
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Attachment: d6644-1a.diff
The attached patch, [^d6644-1a.diff], changes the parser so that {{ALTER TABLE
t ALTER COLUMN c SET NOT NULL}} is an alias for {{ALTER TABLE t ALTER COLUMN c
NOT NULL}}, and {{ALTER TABLE t ALTER COLUMN c DROP NOT NULL}} is an alias for
{{ALTER TABLE t ALTER COLUMN c NULL}}. The patch also changes the existing test
cases for {{ALTER COLUMN c \[NOT\] NULL}} in AlterTableTest so that they test
both the old syntax and the standard syntax.
All regression tests passed with the patch.
> Support standard syntax for altering column nullability
> -------------------------------------------------------
>
> Key: DERBY-6644
> URL: https://issues.apache.org/jira/browse/DERBY-6644
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 10.11.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Priority: Minor
> Attachments: d6644-1a.diff
>
>
> Derby supports altering the nullability of a column via an ALTER TABLE
> statement, but the supported syntax is different from what the SQL:2011
> standard defines. We should add support for the standard syntax as well.
> The standard syntax is
> ALTER TABLE t ALTER COLUMN c SET NOT NULL
> ALTER TABLE t ALTER COLUMN c DROP NOT NULL
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