Create "dynamic" statements in a stored procedure

Question

hello
in my stored procedure I need to write a statement like this:
FUNCTION myfunct (mytable IN VARCHAR2)
BEGIN
EXECUTE IMMEDIATE
'SELECT COUNT(*)
INTO myvar
FROM ' || mytable ||
'WHERE mycol = ' || currval;
In short I need to create a sort of "dynamic" statement in which the tablename (nad other...) is a variable....
but I do not guess it's ok...
How can I do?

Answer 1

Hi,
With dyanmic SQL, the INTO clause is part of the EXECUTE IMMEDIATE statement, not the query.
Try something like this:
CREATE OR REPLACE FUNCTION     myfunct
(       mytable       IN     VARCHAR2
RETURN     PLS_INTEGER
IS
     return_num     PLS_INTEGER;
     sql_txt          VARCHAR2 (1000);
BEGIN
     sql_txt := 'SELECT  COUNT (*)'
          || ' FROM ' || mytable;
     dbms_output.put_line (sql_txt || ' = sql_txt in myfunct');
--     EXECUTE IMMEDIATE sql_txt INTO return_num;
     RETURN     return_num;
END     myfunct
/It's a good idea to develop dynamic SQL as shown above; putting the dynamic statement into a variable that can easily be displayed for debugging.
When it looks right, then un-comment the EXECUTE IMMEDAITE statement.
Before moving the code into Production, comment out (or remove) the put_line statement.