ASF GitHub Bot commented on CLOUDSTACK-10278:

rafaelweingartner commented on issue #2449: WIP CLOUDSTACK-10278 idempotent 
column addition
URL: https://github.com/apache/cloudstack/pull/2449#issuecomment-371132517
   @ernjvr I would go with this one. It does not mean that I like this type of 
solution. It is a palliative one, and we already have so much of these things 
around. However, I do understand that to change the database upgrade scheme 
that we use now is something way more complex (at least to do something good). 
I would expect us to change the DB schema upgrade method in a future ACS 5 for 

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> Adding a SQL table column is not Idempotent
> -------------------------------------------
>                 Key: CLOUDSTACK-10278
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-10278
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the 
> default.) 
>          Components: Install and Setup
>    Affects Versions:,
>            Reporter: Ernie Janse van Rensburg
>            Assignee: Ernie Janse van Rensburg
>            Priority: Major
>   Original Estimate: 4h
>  Remaining Estimate: 4h
> The SQL code to add a new column to a table in the 
> META-INF/db/schema-41000to41100.sql script is not written in an idempotent 
> way. When the upgrade is re-run, the code above causes a SQL error as 
> reported on the user mailing list: 
> ERROR [c.c.u.d.ScriptRunner] (main:null) (logid:)
> Error executing: ALTER TABLE cloud.network_offerings ADD COLUMN for_vpc
> This is a more generic problem for every version due to to the fact that it 
> is not idempotent

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