Cursor fetch into

Question

I have a function, to which i pass a sql statement.In the function using the cursor i get the output of the sql statemnt into a output variable. This function works fine, but for one particular select statement it takes[u] over an hour to execute in the FETCH...INTO statement specifically. The same select statement when executed outside in sql editor returns in under 2 mins.
The output of the sql is 5 records. Any ideas on why it is taking forever in the FETCH...INTO statment?
FUNCTION getOutput(p_sql VARCHAR2)
RETURN VARCHAR2
AS
TYPE extractlinecurtype IS REF CURSOR;
cur_extract extractlinecurtype;
v_oneextractline VARCHAR2 (32767);
v_output VARCHAR2 (32767) := NULL;
crlf CHAR (2) := CHR (10) || CHR (13);
BEGIN
OPEN cur_extract FOR p_sql;
dbms_output.put_line(sysdate);
LOOP
FETCH cur_extract
INTO v_oneextractline;
EXIT WHEN cur_extract%NOTFOUND;
v_output := v_output || CHR (10) || v_oneextractline;
END LOOP;
IF cur_extract%ISOPEN
THEN
CLOSE cur_extract;
END IF;
v_output := v_output || crlf || crlf;
return v_output;
EXCEPTION
WHEN OTHERS
THEN
dbms_output.put_line('error in getoutput' || SQLCODE || SQLERRM);
RETURN NULL;
END getOutput;

Answer 1

I cannot send the sql cause it uses our internal tables. My question is why does a query take under 2mins to run in sql editor and over an hr in pl/sql with cursor?
Is there something wrong in declaration?