Dml returning by row_id on global_temporary table

Question

Hi I have this procedure that inserting into global temporary table
is there a way I can get the rowid or some sort of unique identifier back after I am inserting heres the code example
basically I need to do some sort of processing in the record set into gt_obj table
CREATE GLOBAL TEMPORARY TABLE gt_obj as select * from dba_objects where rownum < 101
select * from gt_obj
declare
type tab_rowid is table of varchar2(101);
lv_rowid tab_rowid;
begin
insert into gt_obj
select * from dba_objects where object_type = 'TABLE' and rownum < 101
returning rowid bulk collect into lv_rowid;
for i in lv_rowid.first..lv_rowid.last
loop
dbms_output.put_line('rowid='||lv_rowid(i));
end loop;
end;

Answer 1

vxwo0owxv wrote:
Hi I have this procedure that inserting into global temporary table
is there a way I can get the rowid or some sort of unique identifier back after I am inserting heres the code example
basically I need to do some sort of processing in the record set into gt_obj table
CREATE GLOBAL TEMPORARY TABLE gt_obj as select * from dba_objects where rownum < 101This is not the appropriate way to create and use a global temp table (GTT).
A GGT should be defined once only. As permanent static definition in the data dictionary. Kind of like an object class definition in an oo language.
A session can then "instantiate" a GTT of that definition. Just like you would create an object of that specific class type in an oo language.
But a GTT is a tad easier to use. You do not need to call its constructor to create it. You do not need to calls its destructor to free and release its allocated memory when done using it.
You create the GTT definition once and up front as part of your database model:
SQL> create global temporary table name_values(
  2     name varchar2(20),
  3     value varchar2(30)
  4  )
  5  on commit preserve rows;
Table created.In a session, you can at anytime now instantiate a GTT using that definition by inserting data into it:
SQL> insert into name_values select 'table', table_name from user_tables where rownum < 11;
10 rows created.You do not run dynamic SQL in PL/SQL to use a CTAS (Create Table As Select) to create GTTs. Oracle is nothing at all like SQL-Server.
for i in lv_rowid.first..lv_rowid.last
loop
dbms_output.put_line('rowid='||lv_rowid(i));
end loop;Why? Yes, GTT rows do have rowids. But why would you want to use it? You just as well can simply read the entire GTT as it contains all your session's data inserted into it. In other words, it contains private session only data. Nothing else.
So what do you achieve by using rowids to loop through the rows in the GTT? It does not make access any faster or more flexible than doing a simple and straightforward select all rows from the GTT.
I suggest you review what a GTT is and how it works.