Alter table to add a user-defined type column : Object Table « Object Oriented « Oracle PL/SQL Tutorial

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Oracle PL/SQL Tutorial » Object Oriented » Object Table 
32. 9. 13. Alter table to add a user-defined type column
SQL>
SQL> create or replace type Address_Type
  2  as object
  3  (  street_addr1   varchar2(25),
  4     street_addr2   varchar2(25),
  5     city           varchar2(30),
  6     state          varchar2(2),
  7     zip_code       number
  8  )
  9  /

Type created.

SQL>
SQL> alter type Address_Type
  2  REPLACE
  3  as object
  4  (  street_addr1   varchar2(25),
  5     street_addr2   varchar2(25),
  6     city           varchar2(30),
  7     state          varchar2(2),
  8     zip_code       number,
  9     member function toString return varchar2,
 10     map member function mapping_function return varchar2
 11  )
 12  /

Type altered.

SQL>
SQL> create or replace type body Address_Type
  2  as
  3      member function toString return varchar2
  4      is
  5      begin
  6          if street_addr2 is not NULL )
  7          then
  8              return street_addr1 || ' ' ||
  9                     street_addr2 || ' ' ||
 10                     city || ', ' || state || ' ' || zip_code;
 11          else
 12              return street_addr1 || ' ' ||
 13                     city || ', ' || state || ' ' || zip_code;
 14          end if;
 15      end;
 16
 17      map member function mapping_function return varchar2
 18      is
 19      begin
 20          return to_charnvl(zip_code,0)'fm00000' ) ||
 21                 lpadnvl(city,' ')30 ||
 22                 lpadnvl(street_addr1,' ')25 ||
 23                 lpadnvl(street_addr2,' ')25 );
 24      end;
 25  end;
 26  /

Type body created.

SQL>
SQL>
SQL> create table people
  2  name           varchar2(10),
  3    home_address   address_type,
  4    work_address   address_type
  5  )
  6  /

Table created.

SQL>
SQL>
SQL> create or replace type Address_Array_Type
  2  as varray(50of Address_Type
  3  /

Type created.

SQL>
SQL> alter table people add previous_addresses Address_Array_Type
  2  /

Table altered.

SQL> select name, prev.city, prev.state, prev.zip_code
  2    from people p, tablep.previous_addresses prev
  3   where prev.state = 'PA';

no rows selected

SQL> /

no rows selected

SQL>
SQL> drop table people;

Table dropped.

SQL> drop type Address_Array_Type;

Type dropped.

SQL> drop type address_type;

Type dropped.
32. 9. Object Table
32. 9. 1. You can also use an object type to define an entire table, and the table is known as an object table.
32. 9. 2. Inserting a row into an object table
32. 9. 3. One-step INSERTs into a Table that Contains Row Objects
32. 9. 4. INSERT Values into a Table that Contains Row Objects (TCRO)
32. 9. 5. Insert data just as one would ordinarily do with a common SQL table:
32. 9. 6. SELECTing Individual Columns in Table that Contains Row Objects
32. 9. 7. Selecting Rows from the object Table
32. 9. 8. SELECT from the object-oriented table
32. 9. 9. Updating a Row in the object Table
32. 9. 10. UPDATE a Table that Contains Row Objects (TCRO)
32. 9. 11. Accessing the object table by reference
32. 9. 12. Create a table based on an Object with methods
32. 9. 13. Alter table to add a user-defined type column
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