в 13:45, 26 мая 2010

2010-05-26T13:45:19Z

Admin: 1 версия

2010-05-26T10:02:45Z

1 версия

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==Column "REF" an object type==



<source lang="sql">

SQL>
SQL> CREATE OR REPLACE TYPE address AS OBJECT (
2 street_1 VARCHAR2(40),
3 street_2 VARCHAR2(40),
4 city VARCHAR2(40),
5 state_abbr VARCHAR2(2),
6 zip_code VARCHAR2(5),
7 phone_number VARCHAR2(10),
8 MEMBER PROCEDURE ChangeAddress (
9 st_1 IN VARCHAR2, st_2 IN VARCHAR2, cty IN VARCHAR2,
10 state IN VARCHAR2, zip IN VARCHAR2),
11 MEMBER FUNCTION getStreet (line_no IN number) RETURN VARCHAR2,
12 MEMBER FUNCTION getCity RETURN VARCHAR2,
13 MEMBER FUNCTION getStateAbbr RETURN VARCHAR2,
14 MEMBER FUNCTION getPostalCode RETURN VARCHAR2,
15 MEMBER FUNCTION getPhone RETURN VARCHAR2,
16 MEMBER PROCEDURE setPhone (newPhone IN VARCHAR2)
17 );
18 /
Type created.
SQL>
SQL>
SQL> CREATE OR REPLACE TYPE BODY address AS
2 MEMBER PROCEDURE ChangeAddress (
3 st_1 IN VARCHAR2, st_2 IN VARCHAR2, cty IN VARCHAR2,
4 state IN VARCHAR2, zip IN VARCHAR2) IS
5 BEGIN
6 IF (st_1 IS NULL) OR (cty IS NULL) OR
7 (state IS NULL) OR (zip IS NULL)
8 OR (upper(state) NOT IN ("AK","AL","AR","AZ","CA","CO",
9 "CT","DC","DE","FL","GA","HI",
10 "IA","ID","IL","IN","KS","KY",
11 "LA","MA","MD","ME","MI","MN",
12 "MO","MS","MT","NC","ND","NE",
13 "NH","NJ","NM","NV","NY","OH",
14 "OK","OR","PA","RI","SC","SD",
15 "TN","TX","UT","VA","VT","WA",
16 "WI","WV","WY"))
17 OR (zip <> ltrim(to_char(to_number(zip),"09999"))) THEN
18 RAISE_application_error(-20001,"The new Address is invalid.");
19 ELSE
20 street_1 := st_1;
21 street_2 := st_2;
22 city := cty;
23 state_abbr := upper(state);
24 zip_code := zip;
25 END IF;
26 END;
27
28 MEMBER FUNCTION getStreet (line_no IN number)
29 RETURN VARCHAR2 IS
30 BEGIN
31 IF line_no = 1 THEN
32 RETURN street_1;
33 ELSIF line_no = 2 THEN
34 RETURN street_2;
35 ELSE
36 RETURN " ";
37 END IF;
38 END;
39
40 MEMBER FUNCTION getCity RETURN VARCHAR2 IS
41 BEGIN
42 RETURN city;
43 END;
44
45 MEMBER FUNCTION getStateAbbr RETURN VARCHAR2 IS
46 BEGIN
47 RETURN state_abbr;
48 END;
49
50 MEMBER FUNCTION getPostalCode RETURN VARCHAR2 IS
51 BEGIN
52 RETURN zip_code;
53 END;
54
55 MEMBER FUNCTION getPhone RETURN VARCHAR2 IS
56 BEGIN
57 RETURN phone_number;
58 END;
59
60 MEMBER PROCEDURE setPhone (newPhone IN VARCHAR2) IS
61 BEGIN
62 phone_number := newPhone;
63 END;
64 END;
65 /
Type body created.
SQL> set echo on
SQL>
SQL>
SQL> CREATE OR REPLACE TYPE appartment AS OBJECT (
2 BldgName VARCHAR2(40),
3 BldgAddress address,
4 BldgMgr INTEGER,
5 MEMBER PROCEDURE ChangeMgr (NewMgr IN INTEGER),
6 ORDER MEMBER FUNCTION Compare (OtherAppartment IN appartment)
7 RETURN INTEGER
8 );
9 /
Type created.
SQL>
SQL> CREATE OR REPLACE TYPE BODY appartment AS
2 MEMBER PROCEDURE ChangeMgr(NewMgr IN INTEGER) IS
3 BEGIN
4 BldgMgr := NewMgr;
5 END;
6
7 ORDER MEMBER FUNCTION Compare (OtherAppartment IN appartment)
8 RETURN INTEGER IS
9 BldgName1 VARCHAR2(40);
10 BldgName2 VARCHAR2(40);
11 BEGIN
12 BldgName1 := upper(ltrim(rtrim(BldgName)));
13 BldgName2 := upper(ltrim(rtrim(OtherAppartment.BldgName)));
14
15 IF BldgName1 = BldgName2 THEN
16 RETURN 0;
17 ELSIF BldgName1 < BldgName2 THEN
18 RETURN -1;
19 ELSE
20 RETURN 1;
21 END IF;
22 END;
23 END;
24 /
Type body created.
SQL> CREATE TABLE employee(
2 emp_id INTEGER,
3 emp_name VARCHAR2(32),
4 supervised_by INTEGER,
5 pay_rate NUMBER(9,2),
6 pay_type CHAR,
7 emp_bldg REF appartment);
Table created.
SQL>
SQL> drop table employee;
Table dropped.
SQL>
SQL> drop type appartment;
Type dropped.
SQL> --

</source>

==Create table with ref==



<source lang="sql">

SQL> CREATE OR REPLACE TYPE address_obj as OBJECT(
2 street VARCHAR2(20),
3 city VARCHAR2(20),
4 state CHAR(2),
5 zip CHAR(5));
6 /
Type created.
SQL>
SQL> CREATE TABLE address_table OF ADDRESS_OBJ;
Table created.
SQL>
SQL> CREATE TABLE client (name VARCHAR2(20),
2 address REF address_obj scope is address_table);
Table created.
SQL>
SQL>
SQL> INSERT INTO client SELECT "Walsh", REF(aa) FROM address_table aa;
0 rows created.
SQL>
SQL> -- SELECTing Individual Columns in TCROs
SQL>
SQL>
SQL> SELECT c.name, c.address.city FROM client c;
no rows selected
SQL>
SQL>
SQL>
SQL> drop table client;
Table dropped.
SQL>
SQL> drop table address_table;
Table dropped.
SQL>
SQL>

</source>

==Delete records==



<source lang="sql">

SQL> CREATE OR REPLACE TYPE address_obj as OBJECT(
2 street VARCHAR2(20),
3 city VARCHAR2(20),
4 state CHAR(2),
5 zip CHAR(5));
6 /
Type created.
SQL>
SQL> CREATE TABLE address_table OF ADDRESS_OBJ;
Table created.
SQL>
SQL> INSERT INTO address_table VALUES (ADDRESS_OBJ("1 A St.","Mobile","AL","36608"));
1 row created.
SQL>
SQL> CREATE TABLE client (name VARCHAR2(20),
2 address REF address_obj scope is address_table);
Table created.
SQL>
SQL> INSERT INTO client SELECT "Walsh", REF(aa) FROM address_table aa;
1 row created.
SQL>
SQL>
SQL> -- SELECTing Individual Columns in TCROs
SQL>

SQL>
SQL>
SQL> -- Deleting Referenced Rows
SQL>
SQL>
SQL> SELECT * FROM address_table;
STREET CITY ST ZIP
-------------------- -------------------- -- -----
1 A St. Mobile AL 36608

SQL>
SQL> -- Now delete a row from Address_table:
SQL>
SQL> DELETE FROM address_table WHERE zip = "32563";
0 rows deleted.
SQL>
SQL> -- And now, SELECT from the Client table that contains a reference to the Address_table:
SQL>
SQL> SELECT * FROM client;
NAME ADDRESS
--------- --------------------------------------------------
Walsh 0000220208707EBDF1B9E344FDB604B14DA624CBA048316BEA
1E2D4128AC1F28472E126764

SQL>
SQL> SELECT name, DEREF(address)
2 FROM client;
NAME
---------
DEREF(ADDRESS)(STREET, CITY, STATE, ZIP)
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Walsh
ADDRESS_OBJ("1 A St.", "Mobile", "AL", "36608")

SQL>
SQL>
SQL>
SQL> drop table client;
Table dropped.
SQL>
SQL> drop table address_table;
Table dropped.
SQL>
SQL>
SQL>

</source>

==Insert with ref==



<source lang="sql">

SQL> CREATE OR REPLACE TYPE address_obj as OBJECT(
2 street VARCHAR2(20),
3 city VARCHAR2(20),
4 state CHAR(2),
5 zip CHAR(5));
6 /
Type created.
SQL>
SQL> CREATE TABLE address_table OF ADDRESS_OBJ;
Table created.
SQL>
SQL> INSERT INTO address_table VALUES (ADDRESS_OBJ("1 A St.","Mobile","AL","36608"));
1 row created.
SQL>
SQL> CREATE TABLE client (name VARCHAR2(20),
2 address REF address_obj scope is address_table);
Table created.
SQL>
SQL>
SQL> INSERT INTO client SELECT "Walsh", REF(aa) FROM address_table aa;
1 row created.
SQL>
SQL> -- SELECTing Individual Columns in TCROs
SQL>
SQL>
SQL> SELECT c.name, c.address.city FROM client c;
NAME ADDRESS.CITY
--------- --------------------
Walsh Mobile
SQL>
SQL>
SQL>
SQL> drop table client;
Table dropped.
SQL>
SQL> drop table address_table;
Table dropped.
SQL>
SQL>

</source>

==List to list using object references==



<source lang="sql">

SQL> CREATE OR REPLACE TYPE bookType AS OBJECT
2 (book_id VARCHAR2(10),
3 book_title VARCHAR2(30))
4 /
Type created.
SQL>
SQL> CREATE OR REPLACE TYPE authorType AS OBJECT
2 (author_id VARCHAR2(10),
3 author_name VARCHAR2(30))
4 /
Type created.
SQL>
SQL> CREATE TABLE Book OF bookType
2 (book_id NOT NULL,
3 PRIMARY KEY (book_id));
Table created.
SQL>
SQL> CREATE TABLE Author OF authorType
2 (author_id NOT NULL,
3 PRIMARY KEY (author_id));
Table created.
SQL>
SQL> CREATE TABLE Write
2 (Book REF bookType,
3 Index_Book NUMBER NOT NULL,
4 Author REF authorType);
Table created.
SQL>
SQL> CREATE TABLE Written_By
2 (Author REF authorType,
3 Index_Author NUMBER NOT NULL,
4 Book REF bookType);
Table created.
SQL>
SQL>
SQL> drop type bookType force;
Type dropped.
SQL> drop type authorType force;
Type dropped.
SQL>
SQL>
SQL> drop table Book;
Table dropped.
SQL> drop table Author;
Table dropped.
SQL> drop table Write;
Table dropped.
SQL> drop table Written_By;
Table dropped.

</source>

==MAKE_REF and user view==



<source lang="sql">

SQL>
SQL>
SQL> create type addressType as object
2 (Street VARCHAR2(50),
3 City VARCHAR2(25),
4 State CHAR(2),
5 Zip NUMBER);
6 /
SQL> create type personType as object
2 (Name VARCHAR2(25),
3 Address addressType);
4 /
SQL>
SQL> create table emp
2 (cid NUMBER primary key,
3 Name VARCHAR2(25),
4 Street VARCHAR2(50),
5 City VARCHAR2(25),
6 State CHAR(2),
7 Zip NUMBER);
SQL>
SQL>
SQL> create or replace type empType as object
2 (cid NUMBER,
3 Name VARCHAR2(25),
4 Street VARCHAR2(50),
5 City VARCHAR2(25),
6 State CHAR(2),
7 Zip NUMBER);
8 /
SQL>
SQL> create view empView of empType
2 with object OID (cid) as
3 select cid, Name, Street, City, State, Zip
4 from emp;
SQL>
SQL> create table emp_CALL
2 (cid NUMBER,
3 Call_Number NUMBER,
4 Call_Date DATE,
5 constraint emp_CALL_PK primary key (cid, Call_Number),
6 constraint emp_CALL_FK foreign key (cid)references emp(cid));
SQL>
SQL>
SQL> create view empCallView as
2 select MAKE_REF(empView, cid) cid,
3 Call_Number,
4 Call_Date
5 from emp_CALL;
SQL>
SQL> select DEREF(CCOV.cid)
2 from empCallView CCOV
3 where Call_Date = TRUNC(SysDate);
SQL>
SQL>
SQL> drop view empCallView;
SQL> drop view empView;
SQL> drop table emp_CALL;
SQL> drop table emp;
SQL>
SQL>
SQL> drop type personType;
SQL>
SQL> drop type addressType;
SQL>

</source>

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Oracle PL/SQL/Object Oriented Database/Ref - История изменений

в 13:45, 26 мая 2010

Admin: 1 версия