I am preparing stored procedure with oracle .I m using multiple inner joins with the same table where an input parameter value is checked within each inner join. I want to eliminate particular inner join if the input parameter is null
1 Answer
You would need to use dynamic SQL to construct the appropriate query for the parameters like this:
PROCEDURE myproc (p1 VARCHAR2) IS
l_sql LONG;
l_cursor SYS_REFCURSOR;
BEGIN
l_sql := 'SELECT a, b, c FROM table1';
IF p1 IS NOT NULL THEN
l_sql := l_sql || ' JOIN table2 ON table2.x = table1.x';
END IF;
l_sql := l_sql || ' WHERE table1.y = :bind1';
OPEN l_cursor FOR l_sql USING 123;
...
END;
