Oracle Built−in Packages- P65 ppt

... queue. The sale.show_expired_sales is interesting because it combines two different elements of Oracle AQ: use of the operational interface (the dequeue program) and direct access against the ... execute a cursor FOR loop against AQ$sale_qtable, which is the underlying database table created by Oracle AQ to hold messages for all queues in this queue table. Notice that I request only those

Ngày tải lên: 07/07/2014, 00:20

... execute and then close your DDL cursors. Currently, Oracle will automatically execute DDL statements when they are parsed with a call to PARSE. Oracle Corporation warns users of DBMS_SQL that this ... can avoid any VALUE_ERROR exceptions as follows: [1] This software comes with my book Advanced Oracle PL/SQL Programming with Packages (O'Reilly & Associates, 1996). You can also...

Ngày tải lên: 07/07/2014, 00:20

... sessions connected to an Oracle instance and service routines external to Oracle in the host operating environment. In this kind of application, the service routine connects to Oracle and listens for ... DBMS_PIPE introduces is the ability for Oracle sessions to communicate with each other. Before the existence of database pipes, users connected to an Oracle database could communica...

Ngày tải lên: 07/07/2014, 00:20

... Performing AQ Administrative Tasks (Oracle8 only) Oracle AQ Database Objects Oracle AQ Examples Oracle8 offers a facility (new to Oracle 8) called Oracle AQ (Oracle Advanced Queuing, referred to ... Transaction Identifiers 231 5. Oracle Advanced Queuing Contents: Oracle AQ Concepts Getting Started with Oracle AQ Oracle AQ Nonprogram Elements DBMS_AQ: Interfacing to Oracle...

Ngày tải lên: 07/07/2014, 00:20

... the message will be moved to a user−specified exception queue. 5.1.4 Propagation Features Oracle AQ with Oracle 8.0.4 supports propagation of messages, allowing automated coordination of enqueuing ... database (remote). Since Oracle8 does not support distributed object types, it is not possible to rely on standard database links to perform remote AQ operations. Instead, Oracle AQ offer...

Ngày tải lên: 07/07/2014, 00:20

... the default exception queue associated with the queue table. A warning will then be logged in the Oracle alert file. If the default exception queue is used, the parameter will return a NULL value ... as its own transaction. The queued message is then immediately available for dequeuing by other Oracle sessions. relative_msgid Specifies the message identifier of the message referenced in t...

Ngày tải lên: 07/07/2014, 00:20