Re: Help Renaming Tables!!!

From: <oratune_at_aol.com>
Date: Mon, 14 Aug 2000 21:40:28 GMT
Message-ID: <8n9p0b$k05$1@nnrp1.deja.com>

In article <8n9oec$jhs$1_at_nnrp1.deja.com>,   oratune_at_aol.com wrote:
> In article <8n9nqb$j2l$1_at_nnrp1.deja.com>,
> oratune_at_aol.com wrote:
> > In article <spglbsbekn917_at_corp.supernews.com>,
> > "Tommy" <motykat_at_thriftycall.com> wrote:
> > > I need to create a process that renames a table that is 15 days
 old
 to
> > > todays date.
> > > This is what I have tried and can not make it work:
> > >
> > > Alter Table
> > > (select 'OCC'|| (to_char(sysdate,'YYYYMMDD') - 15) || 'DAILY' into
 t
 from
> > > dual)
> > > Rename To
> > > (select 'OCC'|| (to_char(sysdate,'YYYYMMDD')) || 'DAILY' into t
 from
 dual);
> > >
> > > Can anyone tell me how to make this work?
> > >
> > > Thanks
> > > Tommy
> > >
> > >
> >
> > Using PL/SQL and 8i this is a fairly straightforward task:
> >
> > declare
> > old_tname varchar2(20);
> > new_tname varchar2(20);
> > sql_stmt varchar2(255);
> > begin
> > select 'OCC'|| (to_char(sysdate,'YYYYMMDD') - 15) || 'DAILY'
> > into old_tname
> > from dual;
> > select 'OCC'|| (to_char(sysdate,'YYYYMMDD')) || 'DAILY'
> > into new_tname
> > from dual;
> > sql_stmt := 'alter table '||old_tname||' rename to
 '||new_tname;
> > execute immediate sql_stmt;
> > end;
> > /
> >
> > Without 8i you'll need to use the DBMS_SQL dynamic SQL package:
> >
> > declare
> > old_tname varchar2(20);
> > new_tname varchar2(20);
> > source_cursor integer;
> > ret_val integer;
> > begin
> > select 'OCC'|| (to_char(sysdate,'YYYYMMDD') - 15) || 'DAILY'
> > into old_tname
> > from dual;
> > select 'OCC'|| (to_char(sysdate,'YYYYMMDD')) || 'DAILY'
> > into new_tname
> > from dual;
> > source_cursor := dbms_sql.open_cursor;
> > dbms_sql.parse(source_cursor, 'alter table '||old_tname||'
 rename
> > to '|| new_tname);
> > ret_val := dbms_sql.execute(source_cursor);
> > dbms_sql.close_cursor(source_cursor);
> > exception
> > when others then
> > if dbms_sql.is_open(source_cursor) then
> > dbms_sql.close_cursor(source_cursor);
> > end if;
> > raise;
> > end;
> > /
> >
> > I hope this helps.
> >
> > --
> > David Fitzjarrell
> > Oracle Certified DBA
> >
> > Sent via Deja.com http://www.deja.com/
> > Before you buy.
> >

>

> Oops! Forgot this:

>


> declare

>        old_tname      varchar2(20);

>        new_tname      varchar2(20);

>        source_cursor  integer;

>        ret_val        integer;

>  begin

>        select 'OCC'|| (to_char(sysdate,'YYYYMMDD') - 15) || 'DAILY'

>   into old_tname

>        from dual;

>        select 'OCC'|| (to_char(sysdate,'YYYYMMDD')) || 'DAILY'

>        into new_tname

>        from dual;

>        source_cursor := dbms_sql.open_cursor;

>        dbms_sql.parse(source_cursor, 'alter table '||old_tname||'

 rename


> to '|| new_tname, DBMS_SQL.NATIVE);

>        ret_val := dbms_sql.execute(source_cursor);

>        dbms_sql.close_cursor(source_cursor);

>  exception

>        when others then

>          if dbms_sql.is_open(source_cursor) then

>            dbms_sql.close_cursor(source_cursor);

>          end if;

>        raise;

> end;
> /

>

> --
> David Fitzjarrell
> Oracle Certified DBA

>

> Sent via Deja.com http://www.deja.com/
> Before you buy.

>

One final correction, in the original logic of the select statements:

declare

       old_tname      varchar2(20);
       new_tname      varchar2(20);
       source_cursor  integer;
       ret_val        integer;
 begin
       select 'OCC'|| (to_char(sysdate - 15,'YYYYMMDD')) || 'DAILY'
  into old_tname
       from dual;
       select 'OCC'|| (to_char(sysdate,'YYYYMMDD')) || 'DAILY'
       into new_tname
       from dual;
       source_cursor := dbms_sql.open_cursor;
       dbms_sql.parse(source_cursor, 'alter table '||old_tname||' rename
to '|| new_tname, DBMS_SQL.NATIVE);
       ret_val := dbms_sql.execute(source_cursor);
       dbms_sql.close_cursor(source_cursor);
 exception
       when others then
         if dbms_sql.is_open(source_cursor) then
           dbms_sql.close_cursor(source_cursor);
         end if;
       raise;

 end;
 /

The subtraction should be with the sysdate call, not after -- the code listed above will give 20000730 for a date, whereas the original code will give 20000799 -- not a valid date!

Sorry that wasn't caught earlier.

--
David Fitzjarrell
Oracle Certified DBA


Sent via Deja.com http://www.deja.com/
Before you buy.

Received on Mon Aug 14 2000 - 16:40:28 CDT