ADT
From Oracle FAQ
ADT (Abstract DataType) is a user defined data type (also referred to as UDT's).
Examples[edit]
To define a new datatype to store a person's address:
CREATE OR REPLACE TYPE persons_address AS OBJECT ( streetNumber NUMBER, streetName VARCHAR2(30), citySuburb VARCHAR2(30), state VARCHAR2(4), postCode NUMBER );
Define a employee_type; define a "raise_sal" member function; and create a table based on our new type:
CREATE TYPE employee_t AS OBJECT ( name VARCHAR2(30), ssn VARCHAR2(11), salary NUMBER, MEMBER FUNCTION raise_sal RETURN NUMBER) / CREATE TYPE BODY employee_t AS MEMBER FUNCTION raise_sal RETURN NUMBER IS BEGIN RETURN salary * 1.1; END; END; / -- Test the member function SELECT employee_t('Frank', '12345', 1000).raise_sal() from dual; -- Create table based on employee_t CREATE TABLE emp2 OF employee_t; INSERT INTO emp2 VALUES ( employee_t('Frank', '12345', 1000) ); SELECT x.raise_sal() FROM emp2 x;
Also see[edit]
- Data type - Oracle defined datatypes
Glossary of Terms | ||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | # |