Dynamic FROM clause

Question

Hi, I am needing to use a dynamic "<font color="blue">FROM (insert table name here)</font>" as well. From reading several posts, it seems like I need to do this using dynamic SQL. I can pass the name of the table into the stored procedure, but I am getting confused as to how to turn the SELECT statement part of this function into dynamic SQL since the SELECT statement is already inside a cursor itself. Thank you -
<br><br><b>FUNCTION getDni4wImmStartInterface(p_board_group_id NUMBER)   RETURN interface_cnt_tbl PIPELINED
IS
--fill the cursor with available interfaces for the board_group_id passed in
CURSOR gc_intf IS
   SELECT interface
   FROM TABLE(ipfinterfaces.getinterfaceslist(p_board_group_id))
   WHERE interface NOT IN (SELECT interface FROM physical_interface WHERE board_group_id = p_board_group_id);
l_count NUMBER(10);
l_max   NUMBER(10);
BEGIN
--fetch the max # of interfaces allowed for the board group type
--passed in
SELECT bgt.max_interfaces
INTO l_max
FROM board_group_type bgt, board_groups bg
WHERE bg.board_group_id = p_board_group_id
AND bg.board_group_type_id = bgt.board_group_type_id;
--for interface in the cursor, check to see if there is an interface
--with the same C-S-G in the database that is 1 greater than the one in the cursor
FOR gc_rec IN gc_intf LOOP
SELECT count(*)
INTO l_count
"<font color="blue">FROM INT_DNI_4W_IMM c</font>
  , VIRTUAL_INTERFACE vi
  , BOARD_GROUPS bg
  , PHYSICAL_INTERFACE  pi
  , BOARD b
  WHERE b.BOARD_ID = bg.BOARD_ID
  AND b.SYSTEM_ID = vi.SYSTEM_ID
  AND vi.PHYSICAL_INTERFACE_ID = pi.PHYSICAL_INTERFACE_ID
  AND pi.SYSTEM_ID =  vi. SYSTEM_ID
  AND pi.BOARD_GROUP_ID = bg.BOARD_GROUP_ID
  AND vi.SYSTEM_ID =  bg.SYSTEM_ID
  AND c.VIRTUAL_INTERFACE_ID = vi.VIRTUAL_INTERFACE_ID
  AND bg.BOARD_GROUP_ID = p_board_group_id
  AND pi.Interface = TO_NUMBER(gc_rec.Interface) + 1;
--if there is not interface 1 greater than the one passed in, and if
--the interface passed in is not the max interface, pipe the row back.
     IF l_count = 0 AND (TO_NUMBER(gc_rec.interface) != l_max)
       THEN PIPE ROW (interface_cnt_obj (TO_NUMBER(gc_rec.interface), TO_NUMBER(l_count)));
     END IF;
END LOOP;
RETURN;
END getDni4wImmStartInterface;
</b>

Answer 1

Hi Vikas,
Sorry, I didn't think I could assign p_table_name to l_table_name like that. When I try to implement your suggestion, I get these errors (Is my DECLARE out of place?):<br><br>
Line # = 469 Column # = 1 Error Text = PLS-00103: Encountered the symbol "DECLARE" when expecting one of the following: begin function package pragma procedure subtype type use <an identifier> <a double-quoted delimited-identifier> form current cursor The symbol "begin" was substituted for "DECLARE" to continue. <br><br>
Line # = 474 Column # = 14 Error Text = PLS-00103: Encountered the symbol "=" when expecting one of the following: constant exception <an identifier> <a double-quoted delimited-identifier> table LONG_ double ref char time timestamp interval date binary national character nchar The symbol "<an identifier>" was substituted for "=" to continue.
<br><br>
Line # = 491 Column # = 51 Error Text = PLS-00103: Encountered the symbol "C" when expecting one of the following: * & = - + ; < / > at in is mod remainder not rem <an exponent (**)> <> or != or ~= >= <= <> and or like LIKE2_ LIKE4_ LIKEC_ between || multiset member SUBMULTISET_
<br><br>
Line # = 496 Column # = 3 Error Text = PLS-00103: Encountered the symbol "WHERE" when expecting one of the following: , from into bulk
<br><br>
Line # = 503 Column # = 27 Error Text = PLS-00049: bad bind variable 'B1'
<br><br>
Line # = 506 Column # = 3 Error Text = PLS-00103: Encountered the symbol "EXECUTE"
<br><br>
Here's my current code:<br><br><b>FUNCTION getDni4wImmStartInterface(p_board_group_id NUMBER, p_table_name VARCHAR2)   RETURN interface_cnt_tbl PIPELINED
IS
--fill the cursor with available interfaces for the board_group_id passed in
CURSOR gc_intf IS
   SELECT interface
   FROM TABLE(ipfinterfaces.getinterfaceslist(p_board_group_id))
   WHERE interface NOT IN (SELECT interface FROM physical_interface WHERE board_group_id = p_board_group_id);
DECLARE
l_count NUMBER(10);
l_max   NUMBER(10);
l_sql   LONG;
l_count NUMBER;
l_table_name := p_table_name;
BEGIN
--fetch the max # of interfaces allowed for the board group type
--passed in
SELECT bgt.max_interfaces
INTO l_max
FROM board_group_type bgt, board_groups bg
WHERE bg.board_group_id = p_board_group_id
AND bg.board_group_type_id = bgt.board_group_type_id;
--for interface in the cursor, check to see if there is an interface
--with the same C-S-G in the database that is 1 greater than the one in the cursor
FOR gc_rec IN gc_intf LOOP
l_sql := 'SELECT count(*) FROM ||l_table_name||' c
  , VIRTUAL_INTERFACE vi
  , BOARD_GROUPS bg
  , PHYSICAL_INTERFACE  pi
  , BOARD b
  WHERE b.BOARD_ID = bg.BOARD_ID
  AND b.SYSTEM_ID = vi.SYSTEM_ID
  AND vi.PHYSICAL_INTERFACE_ID = pi.PHYSICAL_INTERFACE_ID
  AND pi.SYSTEM_ID =  vi. SYSTEM_ID
  AND pi.BOARD_GROUP_ID = bg.BOARD_GROUP_ID
  AND vi.SYSTEM_ID =  bg.SYSTEM_ID
  AND c.VIRTUAL_INTERFACE_ID = vi.VIRTUAL_INTERFACE_ID
  AND bg.BOARD_GROUP_ID = :b1
  AND pi.Interface = TO_NUMBER(gc_rec.Interface) + 1;
  EXECUTE IMMEDIATE l_sql INTO l_count USING p_board_group_id;
<br><br></b>Message was edited by:
The Fabulous LB