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https://issues.apache.org/jira/browse/DERBY-3566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anurag Shekhar reassigned DERBY-3566:
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Assignee: Anurag Shekhar
> Alter column set data type not allowed in soft upgrade with unique constraint
> -----------------------------------------------------------------------------
>
> Key: DERBY-3566
> URL: https://issues.apache.org/jira/browse/DERBY-3566
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.4.0.0
> Reporter: Kathey Marsden
> Assignee: Anurag Shekhar
> Priority: Minor
>
> In 10.3 I can do this:
> ij> create table t0 (i int not null, v varchar(1) not null, constraint uq
> unique(v,i));
> 0 rows inserted/updated/deleted
> ij> alter table t0 alter v set data type varchar(2);
> 0 rows inserted/updated/deleted
> ij>
> In 10.4 soft upgrade mode I cannot:
> ij> create table t0 (i int not null, v varchar(1) not null, constraint uq
> unique(v,i));
> 0 rows inserted/updated/deleted
> ij> alter table t0 alter v set data type varchar(2);
> ERROR 42Z20: Column 'V' cannot be made nullable. It is part of a primary key
> or unique constraint, which cannot have any
> nullable columns.
> ij>
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