This interaction is illustrated in Figure 1. Now with this knowledge, you can look at specific information with respect to the Type 2 and Type 4 drivers and examine the advantages of using the Type 4 driver in your application development. A transaction is a set of one or more statements that are executed together as a unit of work UOW. The maximum length is bytes. Before you start your endeavors of hooking up to DB2 via Java, it is a good idea to ensure connectivity to your remote database. Figure 2 DB2 Configuration Assistant. Otherwise, statement concentrator functionality is not used.
|Date Added:||1 August 2006|
|File Size:||17.2 Mb|
|Operating Systems:||Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X|
|Price:||Free* [*Free Regsitration Required]|
Jdb value is a comma-separated list of schema names. Note that our implementation package name is again: They simply retrieve data from the database we created using a simple SQL query. The numbers below indicate the urb in Figure 2. However, there are some key points in a JCC trace that we will discuss later that will help you to narrow down a problem. Installation Connection Driver initialization Features Error handling Transaction management The second section will deal with diagnosing problems and analyzing traces.
The data type of this property is int. The following indicates ubm a Type 2 or Type 4 driver is being used: This property affects dynamic statement cache matching. Note from the code of Listing 2 that the implementation package is com.
In a Type 4 setup, no client Configuration Assistant is needed to catalog remote databases as with the Type 2 driver. Figure 4 Successful execution of our sample code. Import the JDBC core classes for example, import java.
Also, at runtime, in type 2 mode and attempt will be made to load a file named db2jcct2. Note that the implementation package name is com. If the driver version is 3. The maximum length is 12 bytes. If you are just getting started with DB2 locally on your own machine we would recommend bim you download the DB2 Personal Developer’s Edition product.
The use of the JCC driver to take a trace and diagnose problems is not meant for deep diagnosis at the moment.
This value is the default, unless configuration property db2. You can learn more over here. The format in which the result of the ResultSet. You can see in the above trace the return jdbf. This file is installed when the Runtime Client or Application Development client of the product are installed. The legacy driver gets its error messages ubd the DB2 product and essentially spits out the entire error message back to the application.
Whenever you run into any type of problem using the JCC driver, the typical response for further diagnosis is to take a JCC trace. Depending on the environment, you can either:.
With respect to the drivers, J2EE specifies simple transaction management. Read transactions skip rows that are being inserted. This driver can be considered an independent product.
Data Connectivity is a critical, but often overlooked component of the IT imb. This is a pure Java driver and so can run independently of what product is installed on the machine where it runs.
Methods being used If you know the particular Java method that is causing the problem, or if you want to see how a particular method is being used in the trace, then you will find it in the JCC trace. If you know a particular statement or method that is causing the problem, you can always search for it in the JCC trace and then search above and below it to find out any suspicious behavior or error messages that may ibbm to a clue as to what is going on.
A further understanding of the traces used with the Universal JDBC driver and what to search for when taking a trace will help you to solve udbb problems you may encounter when using the Jdhc driver.
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.