Creating and selecting from a dynamic table

Question

Hi,
Iam trying to create a table dynamically and selecting from it in same plsql block, but am getting "table doesnot exist" error. however if i just create a table dynamically and then do a select on it seperately it works..
below is sample code for the same,
working
Line: -----
DECLARE
loc VARCHAR2(20):='bglr';
l_cnt pls_integer;
BEGIN
-- create an employee information table
EXECUTE IMMEDIATE
'CREATE TABLE ' || 'emp_bglr' ||
empno NUMBER(4) NOT NULL,
ename VARCHAR2(10),
job VARCHAR2(9),
sal NUMBER(7,2),
deptno NUMBER(2)
end;
select count(*) from emp_bglr ...works and return me 0 rows
Line: -----
but when i include select in plsql block ..it throws "Table does not exists" error...(iam running below plsql block after dropping the created table)
not working
Line: -----
DECLARE
loc VARCHAR2(20):='bglr';
l_cnt pls_integer;
BEGIN
-- create an employee information table
EXECUTE IMMEDIATE
'CREATE TABLE ' || 'emp_bglr' ||
empno NUMBER(4) NOT NULL,
ename VARCHAR2(10),
job VARCHAR2(9),
sal NUMBER(7,2),
deptno NUMBER(2)
--COMMIT;
END;
Select count(*) into l_cnt from emp_bglr;
dbms_output.put_line('cnt is '||l_cnt);
end;
Line: -----

Answer 1

Becuase your code is first checked for syntax/object existance during compilation and throws an error saying the table does not exist.
Try this:
SQL> ed
Wrote file afiedt.buf
  1   DECLARE
  2   loc VARCHAR2(20):='bglr';
  3   l_cnt pls_integer;
  4   BEGIN
  5   -- create an employee information table
  6   EXECUTE IMMEDIATE 'CREATE TABLE emp_bglr(
  7   empno NUMBER(4) NOT NULL,
  8   ename VARCHAR2(10),
  9   job VARCHAR2(9),
10   sal NUMBER(7,2),
11   deptno NUMBER(2)
12   )';
14  Select count(*) into l_cnt from all_objects where object_name = 'EMP_BGLR';
15  dbms_output.put_line('tab cnt is '||l_cnt);
16  IF (l_cnt = 1) THEN
17  l_cnt := 0;
18  EXECUTE IMMEDIATE 'SELECT count(*) from apps.emp_bglr' into l_cnt;
19  dbms_output.put_line('data cnt is '||l_cnt);
20  END IF;
21* end;
SQL> /
tab cnt is 1
data cnt is 0
PL/SQL procedure successfully completed.
SQL> Edited by: AP on Aug 5, 2010 5:51 AM
Edited by: AP on Aug 5, 2010 5:52 AM