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" <[EMAIL PROTECTED]> 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 > > __________________________________________________ > Do you Yahoo!? > Yahoo! Mail Plus - Powerful. Affordable. Sign up now. > http://mailplus.yahoo.com > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: Rachel Carmichael > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Arup Nanda INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
