Synchronizing two DBs

Question

From DB1 user ,create dblink to DB2 user
suppose Table1 in DB1 user is to be synchronized with Table2 in DB2 user
procedure in DB1
select all records in Table1 and store in arrays (the rowid in arrays) -- i don't know how to do this
insert into Table2@dblink select all records in Table1 where rowid in (Array rowid);
delete from Table1 where rowid in (Array rowid)
Can anyone help me out in creating the arrays of rowids and using them in the insert and delete statements...
The rowids are needed as it takes some time to tranfer from DB1 to DB2,during this time Table1 can be filled with some datas and these datas will be deleted if we don't take the rowids of what we have inserted ...
Thanks in advance

Answer 1

Oracle gives you read-persistency. Once your transaction starts, it won't see newly inserted records.
If you really want to, you could do something like this:
package body thepackage is
  type rt2 is table of pls_integer index by varchar2(20);
  ra2 rt2;
procedure load_array is
  type rt1 is table of rowid;
  ra1  rt1;
begin
  -- unfortunately we can't do bulk collect into varchar2 indexed array
  -- so we take a little detour
  select rowid
  bulk   collect
  into   ra1
  from   table1;
  for i in ra1.first .. ra1.last
  loop
    ra2(rowidtochar(ra1(i).rowid)) := 0;
  end loop;
end;
procedure insert_data is
begin
  insert into table2@dblink
  select *
  from   table1
  where  ra2.exists(rowidtochar(rowid))
    and  not exists ...... -- something to prevent re-inserting records already in table2
end;
end;As an alternative to the above, you could insert the rowids into a global temporary table and reference that instead.