Accessing ODBC Databases from Windows with Oracle Database Gateway for ODBC (DG4. ODBC)Accessing ODBC Databases from Windows with Oracle Database Gateway for ODBC (DG4. ODBC)The Oracle Database Gateway for ODBC (DG4. ODBC) allows you to build heterogeneous solutions that transparently integrate ODBC databases with Oracle. DG4. ODBC for Microsoft Windows enables Oracle client applications to access non- Oracle data in databases for which an MS Windows ODBC driver is available. The data remains in its native store, but to the application appears to be stored in a single, local Oracle database. This tutorial shows how to use an Easysoft ODBC driver to connect Oracle DG4. ODBC on Windows (2. XP, 2. 00. 3, Vista, 7, 8) to heterogeneous data such as Inter. Base and Firebird databases, RMS data, and local or remote C- ISAM/D- ISAM files. Introduction. DG4. ODBC for Windows interacts with Heterogeneous Services (an integrated Oracle database component) to provide transparent connectivity between Oracle and non- Oracle systems. Oracle must be the worst database. If the installer actually succeeds then there are these issues with setup, the bottom of the protocol stack and a host of others. 3 Introduction. The intention of this operation manual is to provide system administrators sufficient background knowledge to install EWA net, configure it and handle. DG4. ODBC uses an Windows ODBC driver to access the non- Oracle system. DG4. ODBC for Windows is in the Oracle 1. Oracle 1. 2c distributions. DG4. ODBC for Windows is also available from the Oracle Technology (OTN) Software Downloads Page. Then in the subsequent page, use the . The document assumes that the Oracle database server is configured and the DG4. ODBC for Windows components are already installed on a Windows machine. To connect Oracle to a non- Oracle system through DG4. ODBC for Windows: Install and configure the ODBC driver on the machine where DG4. ODBC for Windows is installed. Configure Oracle: Configure the gateway init file (init*. Configure Oracle Net for the gateway (listener. Configure the Oracle database for gateway access (tnsnames. Create a database link. Throughout this tutorial, replace ORACLE. For example, c: \apps\Administrator\product\1. All Easysoft’s Windows ODBC drivers are compatible with the Microsoft ODBC Driver Manager. Essentially, we are linking DG4. ODBC for Windows to the ODBC Driver Manager, and the Driver Manager is then responsible for ODBC access. The relevant components are: SQL*Plus - > Oracle Client - > DG4. ODBC instance - > Microsoft ODBC Driver Manager - > ODBC driver - > Database. You need to: Install the ODBC driver on the machine where DG4. ODBC for Windows is installed. In the Windows ODBC Administrator, add a System ODBC data source that connects to the target database. Test the data source. After you have done this to ensure that the ODBC connection is working, Oracle can be configured to use the connection. To access Firebird from Oracle, we used our Firebird ODBC driver to set up the prerequisite ODBC connection. These instructions show you how to install the driver and create and test a System ODBC data source. Although the instructions are based on the Firebird ODBC driver, the process is the same for any Windows ODBC driver from Easysoft. Download the Firebird ODBC driver for Windows platforms. For installation instructions, see the Firebird ODBC driver User’s Guide. In the Windows ODBC Administrator, create a System ODBC data source that connects to the Firebird database you want to access from Oracle. Test your System ODBC data source. In the driver’s ODBC DSN Setup dialog box, click Test. Oracle Configuration. To configure DG4. ODBC for Windows, you need to edit three files and restart the Oracle Listener. The files are: The gateway init filetnsnames. The gateway init file references the System ODBC data source that you added in the ODBC Administrator. Entries that you create in tnsnames. Care needs to be taken when configuring these files, as an incorrect entry in any of them can lead to connection failure. Create a Gateway Init File. On the Oracle server, log in using an account that belongs to the Administrators group. Tom We have 10 cpu's on our production server, we have the following concerns, and missing pieces of knowledge before we start using parallel query on some select. Make a copy of the template gateway init file, initdg. The template file is stored in the ORACLE. For this tutorial, we copied the template init file, initdg. The init file references the System ODBC data source for the target database. For example: # This is a sample agent init file that contains the HS parameters that are. Database Gateway for ODBC. HS init parameters. HS. Note that as DG4. ODBC for Windows uses the SQLDriver. Connect ODBC API, you can actually put any valid ODBC connection string here. HS. You should generally leave this commented out, as tracing can degrade performance. However, if you are having problems, HS. Gateway log files are stored in the ORACLE. For example, ORACLE.
For the Oracle Listener to listen for DG4. ODBC, information about DG4. ODBC must be added to the Oracle Listener configuration file, ORACLE. You need to: Create a SID. For example, we named the init file initfb, and so used fb as the SID. You need to add a connect descriptor for the gateway. The connect descriptor identifies the Oracle server to attach to and the SID. For example: fb. You include this entry when creating the database link with SQL*Plus. Reference the SID. For example, . Do this so that your tnsnames. ADDRESSThis is the entry for your Oracle server. For example. ADDRESS=(PROTOCOL=TCP)(HOST=oracle. For example. CONNECT. To do this, open an MS- DOS window and run: cd ORACLE. If tnsping succeeds, you will get a message similar to: tnsping fb. TNS Ping Utility for 3. Windows: Version 1. Production on 0. 6- MAY- 2. Copyright (c) 1. 99. Oracle. To do this, connect to SQL*Plus as if connecting to your regular database. At the SQL prompt, create a new database link. For example: CREATE PUBLIC DATABASE LINK hslink CONNECT TO. Note that when creating the database link, the database user and password need to be supplied. For example: select * from dual@hslink; where . This is because Easysoft’s Windows ODBC drivers use little endian (UCS- 2. LE) format for SQL. This issue is currently being investigated by Oracle and should be resolved in Oracle version 1.
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