This manual describes the Oracle Transparent Gateway for Informix, which enables Oracle client applications to access Informix data through Structured Query Language (SQL). The gateway, with the Oracle database server, creates the appearance that all data resides on a local Oracle database server, even though the data can be widely distributed.
This preface covers the following topics:
This manual is intended for Oracle database administrators who perform the following tasks:
Installing and configuring the Oracle Transparent Gateway for Informix
Diagnosing gateway errors
Using the gateway to access Informix data
Note: You should understand the fundamentals of transparent gateways and the HP-UX operating system before using this guide to install or administer the gateway. |
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This document contains:
This chapter introduces the Oracle Transparent Gateway for Informix.
Chapter 2, "Configuring the Gateway"
This chapter explains how to configure the gateway for Informix.
Chapter 3, "Informix Gateway Features and Restrictions"
This chapter explains how to use the gateway to access Informix data, pass Informix commands from applications to the Informix database, perform distributed queries, and copy data.
This chapter contains case studies that demonstrate some of the features of the Oracle Transparent Gateway.
Appendix A, "Data Type Conversion"
This appendix describes how the gateway converts Informix data types to Oracle data types.
Appendix B, "Supported SQL Syntax and Functions"
This appendix describes the SQL statements and Oracle functions supported by Informix.
This appendix contains information about data dictionary support, data dictionary mapping, and gateway data dictionary descriptions.
Appendix D, "Heterogeneous Services Initialization Parameters"
This appendix contains information about Heterogeneous Services initialization parameters.
For more information, see these Oracle resources:
Oracle Database New Features
Oracle Call Interface Programmer's Guide
Oracle Enterprise Manager Administrator's Guide
Oracle Database Administrator's Guide
Oracle Database Application Developer's Guide - Fundamentals
Oracle Database Concepts
Oracle Database Performance Tuning Guide
Oracle Database Error Messages
Oracle Database Globalization Support Guide
Oracle Database Reference
Oracle Database SQL Reference
Oracle Database Net Services Administrator's Guide
SQL*Plus User's Guide and Reference
Oracle Database Heterogeneous Connectivity Administrator's Guide
Oracle Database 2 Day DBA
Oracle Database Security Guide
Many of the examples in this book use the sample schemas, which are installed by default when you select the Basic Installation option with an Oracle Database installation. Refer to Oracle Database Sample Schemas for information on how these schemas were created and how you can use them yourself.
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This section describes the conventions used in the text and code examples of this documentation set. It describes:
We use various conventions in text to help you more quickly identify special terms. The following table describes those conventions and provides examples of their use.
Convention | Meaning | Example |
---|---|---|
Bold | Bold typeface indicates terms that are defined in the text or terms that appear in a glossary, or both. | When you specify this clause, you create an index-organized table. |
Italics | Italic typeface indicates book titles or emphasis. | Oracle Database Concepts
Ensure that the recovery catalog and target database do not reside on the same disk. |
UPPERCASE monospace (fixed-width) font |
Uppercase monospace typeface indicates elements supplied by the system. Such elements include parameters, privileges, datatypes, RMAN keywords, SQL keywords, SQL*Plus or utility commands, packages and methods, as well as system-supplied column names, database objects and structures, usernames, and roles. | You can specify this clause only for a NUMBER column.
You can back up the database by using the Query the Use the |
lowercase monospace (fixed-width) font |
Lowercase monospace typeface indicates executables, filenames, directory names, and sample user-supplied elements. Such elements include computer and database names, net service names, and connect identifiers, as well as user-supplied database objects and structures, column names, packages and classes, usernames and roles, program units, and parameter values.
Note: Some programmatic elements use a mixture of UPPERCASE and lowercase. Enter these elements as shown. |
Enter sqlplus to open SQL*Plus.
The password is specified in the Back up the datafiles and control files in the The Set the Connect as The |
lowercase italic monospace (fixed-width) font |
Lowercase italic monospace font represents placeholders or variables. | You can specify the parallel_clause .
Run |
Code examples illustrate SQL, PL/SQL, SQL*Plus, or other command-line statements. They are displayed in a monospace (fixed-width) font and separated from normal text as shown in this example:
SELECT username FROM dba_users WHERE username = 'MIGRATE';
The following table describes typographic conventions used in code examples and provides examples of their use.
Convention | Meaning | Example |
---|---|---|
[ ] |
Brackets enclose one or more optional items. Do not enter the brackets. |
DECIMAL (digits [ , precision ]) |
{ } |
Braces enclose two or more items, one of which is required. Do not enter the braces. |
{ENABLE | DISABLE} |
| |
A vertical bar represents a choice of two or more options within brackets or braces. Enter one of the options. Do not enter the vertical bar. |
{ENABLE | DISABLE} [COMPRESS | NOCOMPRESS] |
...
|
Horizontal ellipsis points indicate either:
|
CREATE TABLE ... AS subquery; SELECT col1, col2, ... , coln FROM employees; |
. . . |
Vertical ellipsis points indicate that we have omitted several lines of code not directly related to the example. |
SQL> SELECT NAME FROM V$DATAFILE; NAME ------------------------------------ /fsl/dbs/tbs_01.dbf /fs1/dbs/tbs_02.dbf . . . /fsl/dbs/tbs_09.dbf 9 rows selected. |
Other notation | You must enter symbols other than brackets, braces, vertical bars, and ellipsis points as shown. |
acctbal NUMBER(11,2); acct CONSTANT NUMBER(4) := 3; |
Italics
|
Italicized text indicates placeholders or variables for which you must supply particular values. |
CONNECT SYSTEM/system_password DB_NAME = database_name |
UPPERCASE |
Uppercase typeface indicates elements supplied by the system. We show these terms in uppercase in order to distinguish them from terms you define. Unless terms appear in brackets, enter them in the order and with the spelling shown. However, because these terms are not case sensitive, you can enter them in lowercase. |
SELECT last_name, employee_id FROM employees; SELECT * FROM USER_TABLES; DROP TABLE hr.employees; |
lowercase
|
Lowercase typeface indicates programmatic elements that you supply. For example, lowercase indicates names of tables, columns, or files.
Note: Some programmatic elements use a mixture of UPPERCASE and lowercase. Enter these elements as shown. |
SELECT last_name, employee_id FROM employees; sqlplus hr/hr CREATE USER mjones IDENTIFIED BY ty3MU9; |