View creation Procedure

Question

Hi,
I hav created a procedure to create a daily view with 62 tables somthing like this
Create or replace Procedure View_Cre as
ex_command LONG:= null;
ex1_command LONG:= null;
ex2_command LONG:= null;
ex3_command LONG:= null;
begin
ex1_command :='CREATE VIEW VIEW_NAME AS '||chr(10)||'Select * from TAB_'||to_char(sysdate,'DD_MON_YY');
---dbms_output.put_line(ex1_command);
for idx in 1..61 loop
ex_command := ''||chr(10)||' union all'||chr(10)||' Select * from TAB_'||to_char(sysdate-idx,'DD_MON_YY');
--execute immediate ex_command;
--- dbms_output.put_line(ex_command);
ex2_command:=ex1_command||ex_command;
ex1_command:=' ';
ex3_command:= trim(ex2_command);
--dbms_output.put_line(ex2_command);
execute immediate ex3_command;
end loop;
end View_Cre;
However its not "*" there in select statement it contains large string like 30000 chars.
dbms_output gives me correct output but exec immediate gives invalide sql statement,
the output from dbms_output.put_line(ex2_command) creates view without errors when pasted on sql prompt.
Please help.
Thanks in advance.

Answer 1

May be like this ..
declare
  ex_command  LONG := null;
  ex1_command LONG := null;
  ex2_command LONG := null;
  ex3_command LONG := null;
begin
  ex1_command := 'CREATE FORCE VIEW VIEW_NAME AS ' || chr(10) ||
                 'Select * from TAB_' || to_char(sysdate, 'DD_MON_YY');
  ---dbms_output.put_line(ex1_command);
  for idx in 1 .. 61 loop
    ex_command := '' || chr(10) || ' union all' || chr(10) ||
                  ' Select * from TAB_' ||
                  to_char(sysdate - idx, 'DD_MON_YY');
    --execute immediate ex_command;
    --- dbms_output.put_line(ex_command);
    ex2_command := ex1_command || ex_command;
    ex1_command := ' ';
    ex3_command := ex3_command || trim(ex2_command);
    --dbms_output.put_line(ex2_command);
  --dbms_output.put_line(ex3_command);
  --dbms_output.put_line(ex3_command);
  end loop;
  --dbms_output.put_line(ex3_command);
  execute immediate ex3_command;
end;Although, I must say that it is not a good design. You may want to look at your requirement again and see whether it is really required to create a view with dynamic SQL.
Also, you may want to look at the short comings of using LONG in PL/SQL and supported data type in EXECUTE IMMEDIATE with length restriction.