native barcode generator for crystal reports free download TRANSACTIONS in Objective-C

Creation DataMatrix in Objective-C TRANSACTIONS

CHAPTER 8 TRANSACTIONS
Data Matrix 2d Barcode Printer In Objective-C
Using Barcode creation for iPhone Control to generate, create DataMatrix image in iPhone applications.
www.OnBarcode.com
Barcode Maker In Objective-C
Using Barcode encoder for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
DDL). Second, there is a method to do DDL over a database link, in a fashion, using the job queue facility, DBMS_JOB or, in Oracle 10g, the scheduler package, DBMS_SCHEDULER. Instead of trying to do DDL over the link, you use the link to schedule a remote job to be executed as soon as you commit. In that fashion, the job runs on the remote machine, is not a distributed transaction, and can do the DDL. In fact, this is the method by which the Oracle Replication Services perform distributed DDL to do schema replication.
Print USS-128 In Objective-C
Using Barcode printer for iPhone Control to generate, create EAN / UCC - 14 image in iPhone applications.
www.OnBarcode.com
QR Code JIS X 0510 Creation In Objective-C
Using Barcode drawer for iPhone Control to generate, create QR Code 2d barcode image in iPhone applications.
www.OnBarcode.com
Autonomous Transactions
Make European Article Number 13 In Objective-C
Using Barcode creation for iPhone Control to generate, create European Article Number 13 image in iPhone applications.
www.OnBarcode.com
Printing Data Matrix 2d Barcode In Objective-C
Using Barcode generator for iPhone Control to generate, create Data Matrix ECC200 image in iPhone applications.
www.OnBarcode.com
Autonomous transactions allow you to create a transaction within a transaction that will commit or roll back changes independently of its parent transaction. They allow you to suspend the currently executing transaction, start a new one, do some work, and commit or roll back all without affecting the currently executing transaction state. Autonomous transactions provide a new method of controlling transactions in PL/SQL and may be used in Top-level anonymous blocks Local (a procedure in a procedure), stand-alone, or packaged functions and procedures Methods of object types Database triggers
Make USS Code 128 In Objective-C
Using Barcode creator for iPhone Control to generate, create Code 128 Code Set A image in iPhone applications.
www.OnBarcode.com
Encoding UPC E In Objective-C
Using Barcode drawer for iPhone Control to generate, create UPC-E Supplement 2 image in iPhone applications.
www.OnBarcode.com
Before we take a look at how autonomous transactions work, I d like to emphasize that this type of transaction is a powerful and therefore dangerous tool when used improperly. The true need for an autonomous transaction is very rare indeed. I would be very suspicious of any code that makes use of them that code would get extra examination. It is far too easy to accidentally introduce logical data integrity issues into a system using them. In the sections that follow, we ll discuss when they may safely be used after seeing how they work.
Painting Data Matrix 2d Barcode In None
Using Barcode creator for Software Control to generate, create DataMatrix image in Software applications.
www.OnBarcode.com
Data Matrix 2d Barcode Decoder In Visual Basic .NET
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
How Autonomous Transactions Work
Decoding PDF 417 In .NET Framework
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Generate GTIN - 13 In None
Using Barcode creation for Microsoft Excel Control to generate, create European Article Number 13 image in Office Excel applications.
www.OnBarcode.com
The best way to demonstrate the actions and consequences of an autonomous transaction is by example. We ll create a simple table to hold a message: ops$tkyte%ORA11GR2> create table t ( msg varchar2(25) ); Table created. Next, we ll create two procedures, each of which simply INSERTs its name into the message table and commits. However, one of these procedures is a normal procedure and the other is coded as an autonomous transaction. We ll use these objects to show what work persists (is committed) in the database under various circumstances. First, here s the AUTONOMOUS_INSERT procedure: ops$tkyte%ORA11GR2> create or replace procedure Autonomous_Insert 2 as 3 pragma autonomous_transaction; 4 begin 5 insert into t values ( 'Autonomous Insert' ); 6 commit; 7 end; 8 / Procedure created.
Barcode Scanner In Java
Using Barcode Control SDK for BIRT Control to generate, create, read, scan barcode image in BIRT applications.
www.OnBarcode.com
Encode Code 39 Full ASCII In None
Using Barcode drawer for Font Control to generate, create Code 39 image in Font applications.
www.OnBarcode.com
CHAPTER 8 TRANSACTIONS
GS1 - 12 Recognizer In Visual C#
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Data Matrix 2d Barcode Scanner In VS .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Note the use of the pragma AUTONOMOUS_TRANSACTION. This directive tells the database that this procedure, when executed, is to be executed as a new autonomous transaction, independent from its parent transaction.
PDF417 Encoder In None
Using Barcode encoder for Software Control to generate, create PDF 417 image in Software applications.
www.OnBarcode.com
UPC-A Supplement 5 Creation In None
Using Barcode encoder for Online Control to generate, create UPCA image in Online applications.
www.OnBarcode.com
Note A pragma is simply a compiler directive, a method to instruct the compiler to perform some
Read EAN13 In C#.NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Print GS1-128 In None
Using Barcode generation for Software Control to generate, create GS1-128 image in Software applications.
www.OnBarcode.com
compilation option. Other pragmas are available. Refer to the PL/SQL programming manual; you ll find a list of them in its index.
And here s the normal NONAUTONOMOUS_INSERT procedure: ops$tkyte%ORA11GR2> create or replace procedure NonAutonomous_Insert 2 as 3 begin 4 insert into t values ( 'NonAutonomous Insert' ); 5 commit; 6 end; 7 / Procedure created. Now let s observe the behavior of the nonautonomous transaction in an anonymous block of PL/SQL code: ops$tkyte%ORA11GR2> begin 2 insert into t values ( 'Anonymous Block' ); 3 NonAutonomous_Insert; 4 rollback; 5 end; 6 / PL/SQL procedure successfully completed. ops$tkyte%ORA11GR2> select * from t; MSG ------------------------Anonymous Block NonAutonomous Insert As you can see, the work performed by the anonymous block, its INSERT, was committed by the NONAUTONOMOUS_INSERT procedure. Both rows of data were committed, so the ROLLBACK command had nothing to roll back. Compare this to the behavior of the autonomous transaction procedure: ops$tkyte%ORA11GR2> delete from t; 2 rows deleted. ops$tkyte%ORA11GR2> commit; Commit complete. ops$tkyte%ORA11GR2> begin
Copyright © OnBarcode.com . All rights reserved.