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https://jira.duraspace.org/browse/DS-1578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=28373#comment-28373
 ] 

Tim Donohue commented on DS-1578:
---------------------------------

Hardy & I were chatting about this today.  It seems completely reasonable to me 
to have two separate "clean-database.sql" scripts:
* [src]/dspace/etc/oracle/clean-database.sql
* [src]/dspace/etc/postgres/clean-database.sql

We can then tweak the logic in our Ant scripts (ant clean_database) to run the 
appropriate "clean-database.sql", similar to how "ant setup_database" (called 
by "ant fresh_install") already runs the appropriate "database_schema.sql", 
based on whether you are using Oracle or Postgres.

It seems like it's just getting difficult to create/maintain a single 
"clean-database.sql" that works properly for both Oracle and Postgres.
                
> improve clean_database ant target to work better with Oracle
> ------------------------------------------------------------
>
>                 Key: DS-1578
>                 URL: https://jira.duraspace.org/browse/DS-1578
>             Project: DSpace
>          Issue Type: Task
>         Environment: DSpace on Oracle
>            Reporter: Hardy Pottinger
>            Assignee: Hardy Pottinger
>             Fix For: 4.0
>
>
> Running the clean_database ant target against an oracle database still does 
> not produce a "clean" database. A few tables are missed, due to foreign key 
> contraints, which would be helped by changing the order of tables being 
> deleted. Also, a few related sequences are not deleted, not sure why. 
> Manually cleaning up the DB (via drop table, drop sequence, etc.) has always 
> worked in the past. But, it should be something that we can do via a script. 
> One possible solution would be to maintain a drop_database.sql specific to 
> both PostgreSQL and Oracle, to work around any complexities due to running 
> the same SQL on different dialects of SQL.

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