How to write Execute immediate in cursor select Query - sql

Question

How to wite EXECUTE IMMEDIATE in the cursor select Query.
CREATE OR REPLACE PROCEDURE biq_attendee_report (in_from_date IN DATE)
IS
l_cur_query VARCHAR2 (5000) := 'SELECT * from table X where c1='|| in_from_date;
CURSOR cur_attendee_data
IS
EXECUTE IMMEDIATE l_cur_query;
TYPE rec_attendee_data IS TABLE OF cur_attendee_data%ROWTYPE
INDEX BY PLS_INTEGER;
l_cur_attendee_data rec_attendee_data;
BEGIN
OPEN cur_attendee_data;
LOOP
FETCH cur_attendee_data BULK COLLECT INTO l_cur_attendee_data;
EXIT WHEN l_cur_attendee_data.COUNT = 0;
DBMS_OUTPUT.put_line ('here in first insert');
lrec := return_attendee_report ();
out_attendee_tab :=
return_attendee_arr_result (return_attendee_report ());
out_attendee_tab.DELETE;
FOR i IN 1 .. l_cur_attendee_data.COUNT
LOOP
BEGIN
NULL;
EXCEPTION
WHEN OTHERS
THEN
DBMS_OUTPUT.put_line ('Error occurred : ' || SQLERRM);
END;
END LOOP;
END LOOP;
EXCEPTION
WHEN OTHERS
THEN
DBMS_OUTPUT.put_line ('HERE INSIIDE OTHERS' || SQLERRM);
END;
here I try to use initialize cursor outside begin block but it rises exception, how to write a dynamic query for the cursor,
cur_attendee_data is
EXECUTE IMMEDIATE l_cur_query;
Error(113,8): PLS-00103: Encountered the symbol "CUR_ATTENDEE_DATA" when expecting one of the following: := . ( # % ;

Answer 1

If you fetch all rows with BULK COLLECT INTO ... then you need only one loop, the second loop is useless.
The basic solution would be this one:
CREATE OR REPLACE PROCEDURE biq_attendee_report (in_from_date IN DATE) IS
l_cur_query VARCHAR2 (5000) := 'SELECT * from {table X} where c1=:d';
cur_attendee_data SYS_REFCURSOR;
TYPE rec_attendee_data IS TABLE OF {table X}%ROWTYPE;
l_cur_attendee_data rec_attendee_data;
BEGIN
OPEN cur_attendee_data FOR l_cur_query USING in_from_date;
FETCH cur_attendee_data BULK COLLECT INTO l_cur_attendee_data;
FOR i IN 1 .. l_cur_attendee_data.COUNT LOOP
-- do whatever you like to do with l_cur_attendee_data(i)
END LOOP;
CLOSE cur_attendee_data;
END;
However, I don't see any reason to make dynamic SQL. You can simply run
CREATE OR REPLACE PROCEDURE biq_attendee_report (in_from_date IN DATE) IS
cur_attendee_data SYS_REFCURSOR;
TYPE rec_attendee_data IS TABLE OF {table X}%ROWTYPE;
l_cur_attendee_data rec_attendee_data;
BEGIN
OPEN cur_attendee_data FOR SELECT * from {table X} where c1 = in_from_date;
FETCH cur_attendee_data BULK COLLECT INTO l_cur_attendee_data;
FOR i IN 1 .. l_cur_attendee_data.COUNT LOOP
-- do whatever you like to do with l_cur_attendee_data(i)
END LOOP;
CLOSE cur_attendee_data;
END;

Answer 2

You can use below code instead -
CREATE OR REPLACE PROCEDURE biq_attendee_report (in_from_date IN DATE)
IS
l_cur_query VARCHAR2 (100) := 'SELECT * from table X where c1=:in_from_date';
TYPE t_cur IS REF CURSOR;
cur_attendee_data t_cur
TYPE rec_attendee_data IS TABLE OF cur_attendee_data%ROWTYPE
INDEX BY PLS_INTEGER;
l_cur_attendee_data rec_attendee_data;
BEGIN
OPEN cur_attendee_data FOR l_cur_query USING in_from_date;
LOOP
FETCH cur_attendee_data BULK COLLECT INTO l_cur_attendee_data;
EXIT WHEN l_cur_attendee_data.COUNT = 0;
DBMS_OUTPUT.put_line ('here in first insert');
lrec := return_attendee_report ();
out_attendee_tab :=
return_attendee_arr_result (return_attendee_report ());
out_attendee_tab.DELETE;
FOR i IN 1 .. l_cur_attendee_data.COUNT
LOOP
BEGIN
NULL;
EXCEPTION
WHEN OTHERS
THEN
DBMS_OUTPUT.put_line ('Error occurred : ' || SQLERRM);
END;
END LOOP;
END LOOP;
EXCEPTION
WHEN OTHERS
THEN
DBMS_OUTPUT.put_line ('HERE INSIIDE OTHERS' || SQLERRM);
END;

Answer 3

You need to use open cursor for '' as following:
CREATE OR REPLACE PROCEDURE biq_attendee_report (in_from_date IN DATE)
IS
l_cur_query VARCHAR2 (5000) := 'SELECT * from table X where c1='|| in_from_date;
cur_attendee_data SYS_REFCURSOR; -- JUST DECLARED THE CURSOR
--TYPE rec_attendee_data IS TABLE OF cur_attendee_data%ROWTYPE
-- INDEX BY PLS_INTEGER; -- this declaration must be at schema level
l_cur_attendee_data rec_attendee_data;
BEGIN
OPEN cur_attendee_data for l_cur_query; -- OPEN THE CURSOR WITH DYNAMIC QUERY
..
.. -- YOUR CODE AS IT IS
..
Cheers!!