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The EXCLUDE and INCLUDE parameters are two mutually exclusive parameters that you can use to perform what is known as metadata filtering. Metadata filtering enables you to selectively leave out or include certain types of objects during a Data Pump Export or Import job. In the old export utility, you used the CONSTRAINTS, GRANTS, and INDEXES parameters to specify whether you wanted to export those objects. Using the EXCLUDE and INCLUDE parameters, you now can include or exclude many other kinds of objects besides the four objects you could filter previously. For example, if you don t wish to export any packages during the export, you can specify this with the help of the EXCLUDE parameter.

If you use the CONTENT=DATA_ONLY option (same as the old ROWS=Y parameter), you aren t exporting any objects just table row data. Naturally, in this case, you can t use either the EXCLUDE or INCLUDE parameter.

The subscription model is based on how the subscriber identifies the events of interest. There are many ways to categorize subscription models. For example, JEDI24 identifies four categories, called subscription approaches: channel subscriptions, subject subscriptions, content subscriptions, and event combination subscriptions. Each identifies the events of interest to the subscriber in a different way. Many systems allow subscribers to be organized into groups.25 The group is an entity that subscribes to certain events. Subscribers need only to specify which group or groups they are members of. The notion is similar to people signing up to newsgroups. Each newsgroup implicitly defines certain types of messages, so people determine the types of messages they get by choosing a newsgroup rather than defining specific message types. The subscription models I use in this book appear in the hierarchy shown in Figure 2-7.

Simply put, the EXCLUDE parameter helps you omit specific database object types from an export or import operation. The INCLUDE parameter, on the other hand, enables you to include only a specific set of objects. Following is the format of the EXCLUDE and INCLUDE parameters: EXCLUDE=object_type[:name_clause] INCLUDE=object_type[:name_clause] For both the EXCLUDE and INCLUDE parameters, the name clause is optional. As you know, several objects in a database such as tables, indexes, packages, and procedures have names. Other objects, such as grants, don t. The name clause in an EXCLUDE or an INCLUDE parameter lets you apply a SQL function to filter named objects. Here s a simple example that excludes all tables that start with EMP: EXCLUDE=TABLE:"LIKE 'EMP%'" In this example, "LIKE 'EMP%'" is the name clause.

The name clause in an EXCLUDE or INCLUDE parameter is optional. It s purely a filtering device, allowing you finer selectivity within an object type (index, table, and so on). If you leave out the name clause component, all objects of the specified type will be excluded or included. In the following example, Oracle excludes all indexes from the export job, since there is no name clause to filter out only some of the indexes: EXCLUDE=INDEX You can also use the EXCLUDE parameter to exclude an entire schema, as shown in the following example: EXCLUDE=SCHEMA:"='HR'" The INCLUDE parameter is the precise opposite of the EXCLUDE parameter: it forces the inclusion of only a set of specified objects in an export. As in the case of the EXCLUDE parameter, you can use a name clause to qualify exactly which objects you want to export. Thus, you have the ability to selectively choose objects at a fine-grained level. The following three examples show how you can use the name clause to limit the selection of objects: INCLUDE=TABLE:"IN ('EMPLOYEES', 'DEPARTMENTS')" INCLUDE=PROCEDURE INCLUDE=INDEX:"LIKE 'EMP%'" The first example is telling the Data Pump job to include only two tables: employees and departments. In the second example, the INCLUDE parameter specifies that only procedures should be included in this export job. The third example shows how you can specify that only those indexes that start with EMP should be part of the export job. The following example shows how you must use slashes (\) to escape the double quotation marks: $ expdp scott/tiger DUMPFILE=dumphere:file%U.dmp schemas=SCOTT EXCLUDE=TABLE:\"='EMP'\", EXCLUDE=FUNCTION:\"='MY_FUNCTION''\",

24. Gianpaolo Cugola, Elisabetta Di Nitto, and Alfonso Fuggetta, The JEDI Event-Based Infrastructure and Its Application to the Development of the OPSS WFMS, IEEE Transactions on Software Engineering, September 2001. 25. Daniel J. Barrett, Lori A. Clarke, Peri L. Tarr, and Alexander E. Wise, A Framework for Event-Based Software Integration, ACM Transactions on Software Engineering and Methodology, October 1996.

The EXCLUDE and INCLUDE parameters are mutually exclusive. You can use one or the other, not both simultaneously in the same job.