Henry-- Unless I misunderstand your question, the answer is that the aliases are supplied in the CREATE VIEW statement _before_ the view's query, e.g.
create view foobar (col1, col2) as select sum(bytes), sum(blocks) from user_segments; --- "Poras, Henry R." <[EMAIL PROTECTED]> wrote: > Jared, > > Thanks, but what I was wondering is how the views got created in the > first > place. If the field name needs an alias (i.e. substr(x,i,j)) and you > include > this alias in the CREATE VIEW ddl, it will also appear in > dba_views.text. If you > don't include the alias in the DDL, the view won't be created. Yet we > have views > with no aliases in dba_views.text, yet these aliased (column names) > are in > column_name.dba_tab_columns. Also, if I just run the script from > dba_views.text > I get the error saying I need the alias. How did these views get into > the > database? > > Henry > > > -----Original Message----- > [EMAIL PROTECTED] > Sent: Wednesday, December 03, 2003 4:54 PM > To: Multiple recipients of list ORACLE-L > > > > The DBA_VIEWS view does not include the column names in the view. > > If you are really diligent, you could probably tear apart a trace > file and > learn how oracle is reassembling the view from the DD. A hard parse > on a view can produce 250k of trace file. > > It is easier to recreate by generating the ddl from a combination of > all_tab_columns and all_views. > > Been there, done that. :) > > Jared > > > > > "Poras, Henry R." <[EMAIL PROTECTED]> > Sent by: [EMAIL PROTECTED] > > > 12/03/2003 11:49 AM > Please respond to ORACLE-L > > > > To: Multiple recipients of list ORACLE-L > <[EMAIL PROTECTED]> > cc: > Subject: View definition oddities > > > > I found something strange when trying to copy a view from one > database to > another. I spooled the text from dba_views and ran the CREATE VIEW AS > ... > statement. There was an error because one of the fields needed an > alias (it was > SUBSTR(xxx)). I went back to the source database and poked around a > bit. The > view definition from dba_views had no field aliases, but > dba_tab_columns did. > > For example, dba _views would show something like: > View_name: test > Text: SELECT SUBSTR(name1,3) FROM emp > > While dba_tab_columns would have: > Table_name: emp > Column_id: 1 > Column_name: ename > > as if the view_text was SELECT SUBSTR(name1,3) ename FROM emp > > What's up here? > > Henry > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: Poras, Henry R. > 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). > > > > > __________________________________ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Paul Baumgartel 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).
