|Oracle® Database Object-Relational Developer's Guide
12c Release 1 (12.1)
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An object whose value is
NULL is called atomically null. An atomically null object is different from an object that has null values for all its attributes.
The large object (LOB) data type whose value is composed of character data corresponding to the database character set.
An object that is stored as a column of a relational database table (as opposed to an object table). A column object can also be an attribute of another object. A column object is also known as a stored inline object or an embedded object.
An attribute of a column object.
A method call that is dispatched at run-time to the nearest method implementation when there are multiple implementations of the same method using overriding.
An attribute of a leaf-level scalar object.
An invocation where all arguments are literals or invocations of literal methods. Arguments cannot be variables.
Collection types whose elements are collection types, either directly or indirectly.
An operator that combines elements of two nested tables into a single nested table.
Identifier for a row object which can be either system-generated (default) or based on a primary key using the
A table in which each row represents an object. See row object.
The type of the object instance. It is similar to a record that has methods. Object types are user-defined.
Allows handling data types and methods generically using the same interface. In polymorphic overriding, subtypes redefine a method they have inherited. In polymorphic overloading, there may be several versions of the same method, with different parameters.
An Oracle built-in data type that encapsulates references to row objects of a specified object type.
An object that is stored in a complete row in an object table.
Adding new attributes or methods to a subtype that the parent supertype does not have, or changing the implementation of a method or methods.
A PL/SQL block that is stored in the database and can be executed from an application.
A supertype is substitutable if one of its subtypes can substitute or stand in for it in a variable or column whose declared type is the supertype.