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https://issues.apache.org/jira/browse/HIVE-18853?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vineet Garg reassigned HIVE-18853:
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> Alter table change column shouldn't let define same constraint on a column
> with existing constraint
> ---------------------------------------------------------------------------------------------------
>
> Key: HIVE-18853
> URL: https://issues.apache.org/jira/browse/HIVE-18853
> Project: Hive
> Issue Type: Bug
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Priority: Major
> Fix For: 3.0.0
>
>
> {code:sql}
> create table ttest(i int constraint nn1 not null enable);
> alter table ttest change i j int constraint nn2 not null enable);
> {code}
> The above statements will end up creating multiple not null constraints on
> column i/j.
> {code:sql}
> desc formatted ttest;
> # Not Null Constraints
> Table: constraints.ttest
> Constraint Name: nn1
> Column Name: null
> Constraint Name: nn2
> Column Name: j
> {code}
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