Re: this doesn't look right

Rachel,

This is due to Object Relational features. An object type contains attributes which are also referenced in dba_cons_columns since for constraints, the attrubutes are treaded like columns. The attributes names can be longer and so is the column in dba_ view.

HTH. Arup
----- Original Message -----
To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Monday, December 30, 2002 3:23 PM

> As part of the process of making sure that null/not null constraints
> are consistent across development/staging/production, I'm looking at
> the dba_cons_columns table.
>
> Now, as far as I know, column_names are limited to 30 characters,
> correct? If so, why is the column_name column in dba_cons_columns
> (9.2.0.1) a varchar2(4000)? I realize that the "extra space" isn't used
> and is never allocated so it's not like this is wasteful.
>
> But it's inconsistent with everything else, since dba_tab_columns has a
> column_name column of varchar2(30).
>
> anyone know why this is like this?
>
> Rachel
>
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Author: Arup Nanda
  INET: arupnanda_at_hotmail.com

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