[jira] [Assigned] (SQOOP-1625) Repository upgrade issue

["Qian Xu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SQOOP-1625?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Qian Xu reassigned SQOOP-1625:
------------------------------

    Assignee: Qian Xu

> Repository upgrade issue
> ------------------------
>
>                 Key: SQOOP-1625
>                 URL: https://issues.apache.org/jira/browse/SQOOP-1625
>             Project: Sqoop
>          Issue Type: Bug
>    Affects Versions: 1.99.4
>            Reporter: Qian Xu
>            Assignee: Qian Xu
>         Attachments: SQOOP-1625.patch
>
>
> I'm facing such a situation. 
>  1. I recompile the project without changing anything.
>  2. I replace old binaries with newly built binaries (derby's repository is kept unchanged)
>  3. I restart Sqoop2 server, it will trigger an upgrade check. 
> As the repository version is not incremented, I expect nothing to be update. But I see a SQL error:
> {code}
> Caused by: ERROR 42Z93: Constraints 'FK_SQB_NAME_UNIQUE' and 'FK_SQB_NAME_UNIQUE' have the same set of columns, which is not allowed.
> {code}
> In DerbyRepositoryHandler.java, constraints will be added to repository, if repository version is greater than 3, Sqoop will attempt to add particular constraints repeatedly. I'm afraid this will fail. 
> {code}
>     // Add unique constraints on job and links for version 4 onwards
>     if (repositoryVersion > 3) {
>       runQuery(QUERY_UPGRADE_TABLE_SQ_JOB_ADD_UNIQUE_CONSTRAINT_NAME, conn);
>       runQuery(QUERY_UPGRADE_TABLE_SQ_LINK_ADD_UNIQUE_CONSTRAINT_NAME, conn);
>       runQuery(QUERY_UPGRADE_TABLE_SQ_CONFIGURABLE_ADD_UNIQUE_CONSTRAINT_NAME, conn);
>     }
> {code}
> So I'm thinking, whether we should do as follows:
>  1. Increase the current repository version to 5 (instead of 4) and
>  2. Change the following code
> {code}
>     // original
>     if (repositoryVersion > 3) {
>     // proposed
>     if (repositoryVersion <= 4) {
> {code}



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