Oracle uses a string-indexed two-dimensional array
Oracle uses a string-indexed two-dimensional array
-SAMPLE DATA
Store name product sales
A apple 3000
A banana 2000
B APPLE 5000
Bmelon 100
-CONSTRUCT PACKAGE
Create or replace package p_nested_array IS
SUBTYPE prod_name IS VARCHAR2 (200 );
SUBTYPE store_name IS VARCHAR2 (200 );
C_was_processed constant boolean: = TRUE;
TYPE t_prod_qty is table of number (10) index by prod_name;
TYPE t_store_prod_qty is table of t_prod_qty index by store_name;
Store_prod_qty_t t_store_prod_qty;
PROCEDURE reset_store_prod_qty;
FUNCTION already_store_prod (store_name_in VARCHAR2,
Prod_name_in VARCHAR2) return boolean;
PROCEDURE add_store_prod_qty (store_name_in VARCHAR2,
Prod_name_in VARCHAR2,
Qty_in NUMBER );
FUNCTION find_store_prod_qty (store_name_in VARCHAR2,
Prod_name_in VARCHAR2) return number;
PROCEDURE print_store_prod_qty;
END p_nested_array;
/
Create or replace package body p_nested_array IS
PROCEDURE reset_store_prod_qty IS
BEGIN
Store_prod_qty_t.DELETE;
END reset_store_prod_qty;
FUNCTION already_store_prod (store_name_in VARCHAR2,
Prod_name_in VARCHAR2) RETURN BOOLEAN IS
BEGIN
IF store_prod_qty_t (store_name_in) (prod_name_in) IS NOT NULL THEN
Return true;
ELSE
Return false;
End if;
EXCEPTION
WHEN no_data_found THEN
Return false;
END already_store_prod;
PROCEDURE add_store_prod_qty (store_name_in VARCHAR2,
Prod_name_in VARCHAR2,
Qty_in NUMBER) IS
BEGIN
Store_prod_qty_t (store_name_in) (prod_name_in): = qty_in;
END add_store_prod_qty;
FUNCTION find_store_prod_qty (store_name_in VARCHAR2,
Prod_name_in VARCHAR2) RETURN NUMBER IS
BEGIN
RETURN store_prod_qty_t (store_name_in) (prod_name_in );
EXCEPTION
WHEN no_data_found THEN
Return null;
END find_store_prod_qty;
PROCEDURE print_store_prod_qty IS
Store_name_idx store_name;
Prod_name_idx prod_name;
BEGIN
Store_name_idx: = store_prod_qty_t.FIRST;
Dbms_output.put_line ('store _ name_idx: '| store_name_idx );
WHILE store_name_idx IS NOT NULL LOOP
Prod_name_idx: = store_prod_qty_t (store_name_idx). FIRST;
-(Store_prod_qty_t (store_name_idx). FIRST );
WHILE prod_name_idx IS NOT NULL LOOP
Dbms_output.put_line (store_name_idx | '-' | prod_name_idx | ':' |
Store_prod_qty_t (store_name_idx) (prod_name_idx ));
Prod_name_idx: = store_prod_qty_t (store_name_idx). NEXT (prod_name_idx );
-(Store_prod_qty_t (store_name_idx). NEXT (prod_name_idx ));
End loop;
Store_name_idx: = store_prod_qty_t.NEXT (store_name_idx );
End loop;
/* Error raised
FOR I IN store_prod_qty_t.FIRST... store_prod_qty_t.LAST LOOP
FOR j IN store_prod_qty_t (I). FIRST .. store_prod_qty_t (I). LAST LOOP
Dbms_output.put_line ('store' | I | 'saled' | store_prod_qty_t (I)
(J) | ''| j | '.');
End loop;
End loop ;*/
END print_store_prod_qty;
END p_nested_array;
/
-TEST SCRIPT
DECLARE
BEGIN
P_NESTED_ARRAY.RESET_STORE_PROD_QTY;
P_NESTED_ARRAY.ADD_STORE_PROD_QTY ('a, 'apple', 3000 );
P_NESTED_ARRAY.ADD_STORE_PROD_QTY ('A', 'Banana ', 2000 );
P_NESTED_ARRAY.ADD_STORE_PROD_QTY ('B', 'apple ', 5000 );
If not P_NESTED_ARRAY.ALREADY_STORE_PROD ('B', 'melon') THEN
P_NESTED_ARRAY.ADD_STORE_PROD_QTY ('B', 'melon', 100 );
ELSE
DBMS_OUTPUT.PUT_LINE ('store B "s MELON saled' | P_NESTED_ARRAY.FIND_STORE_PROD_QTY ('B', 'melon') | '.');
End if;
DBMS_OUTPUT.PUT_LINE ('store B "s MELON saled' | P_NESTED_ARRAY.FIND_STORE_PROD_QTY ('B', 'melon') | '.');
P_NESTED_ARRAY.print_store_prod_qty;
END;
/
-OUTPUT:
Store B's MELON saled 100.
Store_name_idx:
A-APPLE: 3000
A-BANANA: 2000
B-APPLE: 5000
B-MELON: 100
-- Dylan Presents.