03.04.2015 11:15, Alex Peshkoff wrote:
> Agree with this logic, but it will be useful to add a warning, i.e.
>
> SQL> create table t(a notnull);
> SQL> alter table t alter a drop not null;
> Warning: Column a based on not null domain
> SQL>
>
> Or something like this, may be text is not ideal.

   Column is always based on domain. If it is auto-generated domain, ALTER 
TABLE can drop 
constraint from it without problem.

-- 
   WBR, SD.

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