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Triggers on Object Tables → You can use the OBJECT_VALUE pseudocolumn in a trigger on an object table because, as of 10 g … Release 1 (10.1), OBJECT_VALUE means the object as a whole. This is one example of its use. You can also … example of the use of OBJECT_VALUE in a trigger. To keep track of updates to values in an object table … object
Support for Object-Oriented Programming → Object types are an ideal object-oriented modeling tool, which you can use to reduce the cost and … are modular, maintainable, and reusable, object types allow different teams of programmers to … develop software components concurrently. By encapsulating operations with data, object types let you move … data-maintenance
Using Object Types with IR Subprograms → To define object types for use in any schema, specify the AUTHID CURRENT_USER clause. For … information about object types, see Oracle Database Object-Relational Developer's Guide. Suppose that user HR … creates the object type in Example 8-16. Example 8-16 Creating an Object Type with AUTHID CURRENT
Predefined PL/SQL Large Object (LOB) Data Types → Large object (LOB) data types reference large objects that are stored separately from other data … Table 3-9. Table 3-9 Predefined PL/SQL Large Object (LOB) Data Types Data Type Description Size … large object that is stored in an external file, a LOB data type uses a LOB locator, which is stored … includes a transaction ID, so
Contents → Conventions What's New in Object-Relational Features? Oracle Database 11g Release 1 (11.1) New Features … in Object-Relational Features Oracle Database 10 g Release 1 (10.1) New Features in Object … of the Object-Relational Model Database Features of Oracle Objects About Object Types About Object
Object Types → Object types are abstractions of the real-world entities, such as purchase orders, that application … programs deal with. An object type is a schema object with three kinds of components: A name, which … identifies the object type uniquely within that schema. Attributes, which are built-in types or
Object Values → Object values are compared using one of two comparison functions: MAP and ORDER. Both functions … compare object type instances, but they are quite different from one another. These functions must be … specified as part of any object type that will be compared with other object types. See Also: CREATE
Object Status → Every database object has one of the status values described in Table 6-1. Table 6-1 Database … Object Status Status Meaning Valid The object was successfully compiled, using the current definition in … the data dictionary. Compiled with errors The most recent attempt to compile the object produced … errors. Invalid
Object Revalidation → An object that is not valid when it is referenced must be validated before it can be used … . Validation occurs automatically when an object is referenced; it does not require explicit user action. If … an object is not valid, its status is either compiled with errors, unauthorized, or invalid. For … Errors The compiler cannot
Object Views → In the Oracle object-relational database, an object view let you retrieve, update, insert, and … delete relational data as if it was stored as an object type. You can also define views with columns … that are object datatypes, such as objects, REF s, and collections (nested tables and VARRAY s). See … Also: Oracle
About Object Dependencies and Object Invalidation → static SQL to reference tables or views. An object that references another object is called a … dependent object, and an object being referenced is a referenced object. These references are established … at compile time, and if the compiler cannot resolve them, the dependent object being
Overview of Object Datatypes and Object Views → Object types and other user-defined datatypes let you define datatypes that model the structure and … behavior of the data in their applications. An object view is a virtual object table. See Also: Oracle Database Object-Relational Developer's Guide
Schema Object Naming Rules → Every database object has a name. In a SQL statement, you represent the name of an object with a … marks (\"). If you name a schema object using a quoted identifier, then you must use the double … quotation marks whenever you refer to that object. A nonquoted identifier is not surrounded by any … punctuation.
6 Schema Object Dependencies → If the definition of object A references object B, then A depends on B. This chapter explains … you almost never have to explicitly recompile A after you change B. Topics: Overview of Schema Object … Dependencies Querying Object Dependencies Object Status Invalidation of Dependent Objects … Guidelines
Schema Object Naming Examples → The following examples are valid schema object names: last_name horse hr.hire_date \"EVEN THIS … & THAT!\" a_very_long_and_valid_name All of these examples adhere to the rules listed in \"Schema Object
Database Object Metadata → The DBMS_METADATA package provides interfaces for extracting complete definitions of database objects. The definitions can be expressed either as XML or as SQL DDL. Two styles of interface are provided: A flexible, sophisticated interface for programmatic control A simplified interface for ad hoc querying See Also: Oracle Database PL/SQL Packages and Types Reference for more information about DBMS_METADATA
Object Reference Functions → Object reference functions manipulate REF values, which are references to objects of specified … object types. The object reference functions are: DEREF MAKE_REF REF REFTOHEX VALUE See Also: Oracle … Database Object-Relational Developer's Guide for more information about REF datatypes
Managing Object Name Resolution → Object names referenced in SQL statements can consist of several pieces, separated by periods. The … following describes how the database resolves an object name. Oracle Database attempts to qualify … schema, the database searches for an object whose name matches the first piece of the object name … . If it does
Obtaining Object Growth Trends → , where each row describes the space use of the object at a specific time. The procedure retrieves the … the following values: OBJECT_OWNER: The owner of the object. OBJECT_NAME: The name of the object … . OBJECT_TYPE: The type of the object. START_TIME: A TIMESTAMP value indicating the beginning of the … the
Managing Object Dependencies → This section provides background information about object dependencies and object invalidation, and … explains how invalid objects can be revalidated. The following topics are included: About Object … Dependencies and Object Invalidation Manually Recompiling Invalid Objects with DDL Manually Recompiling Invalid Objects