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About This Manual#

This manual describes the concept of Database Link and how to use.

Audience#

This manual has been prepared for the following users of Altibase:

  • Database administrators
  • Performance administrators
  • Database users
  • Application developers
  • Technical Supporters

It is recommended for those reading this manual possess the following background knowledge:

  • Basic knowledge in the use of computers, operating systems, and operating system utilities
  • Experience in using relational database and an understanding of database concepts
  • Computer programming experience
  • Experience in database server management, operating system management, or network administration
  • Knowledge related to the storage, management and processing of data in distributed environments


Organization#

This manual is organized as follows:

  • Chapter 1: Introduction to Database Link
    This chapter explains the concept of database links and the database link components of Altibase.

  • Chapter 2: Supported Objects, SQL Statements and Data Types
    This chapter describes the SQL statements provided by Altibase for using database links, the schema objects of remote databases accessible via database links, and the data types available with database links.

  • Chapter 3: Configuration of Database Link
    This chapter describes the configuration required to use Altibase's database links.

  • Chapter 4: Database Link-Related SQL Statements
    This chapter describes how to use database link with the SQL syntax and REMOTE function provided for database link control.

  • Appendix A. Properties and Data Dictionary
    This appendix describes the various properties and data dictionaries used in connection with database links.


Documentation Conventions#

This section describes the conventions used in this manual. Understanding these conventions will make it easier to find information in this manual and in the other manuals in the series.

There are two sets of conventions:

  • Syntax diagram conventions
  • Sample code conventions

Syntax Diagram Conventions#

This manual describes command syntax using diagrams composed of the following elements:

Elements Meaning
Indicates the start of a command.
If a syntactic element starts with an arrow, it is not a complete command.
Indicates that the command continues to the next line.
If a syntactic element ends with this symbol, it is not a complete command.
Indicates that the command continues from the previous line.
If a syntactic element starts with this symbol, it is not a complete command.
Indicates the end of a statement.
Indicates a mandatory element.
Indicates an optional element.
Indicates a mandatory element comprised of options.
One, and only one, option must be specified.
Indicates an optional element comprised of options
Indicates an optional element in which multiple elements may be specified.
A comma must precede all but the first element.

Sample Code Conventions#

The code examples explain SQL statements, stored procedures, iSQL statements, and other command line syntax.

The following table describes the printing conventions used in the code examples.

Rules Meaning <Example>
[ ] Indicates an optional item VARCHAR [(size)] [[FIXED |] VARIABLE]
{ } Indicates a mandatory field for which one or more items must be selected. { ENABLE | DISABLE | COMPILE }
| A delimiter between optional or mandatory arguments. { ENABLE | DISABLE | COMPILE }
[ ENABLE | DISABLE | COMPILE ]
. . . Indicates that the previous argument is repeated, or that sample code has been omitted. iSQL> SELECT e_lastname FROM employees;
E_LASTNAME
------------------------
Moon
Davenport
Kobain
. . .
20 rows selected.
Other Symbols Symbols other than those shown above are part of the actual code. EXEC :p1 := 1;
acc NUMBER(11,2)
Italics Statement elements in italics indicate variables and special values specified by the user. SELECT * FROM table_name;
CONNECT userID/password;
Lower case words Indicate program elements set by the user, such as table names, column names, file names, etc. SELECT ename FROM employee;
Upper case words Keywords and all elements provided by the system appear in upper case. DESC SYSTEM.SYS_INDICES;


For more detailed information, please refer to the following documents.

  • Getting Started Guide

  • Installation Guide

  • Administrator's Manual

  • Replication Manual

  • General Reference

  • SQL Reference

  • Stored Procedures Manual

  • iSQL User's Manual

  • Error Message Reference


Altibase Welcomes Your Comments and Feedbacks#

We welcome your feedback on this manual. Your input is valuable in helping us improve future versions of the manual.

If you find any errors, omissions, or other technical issues in the Altibase manual, please report them through the Customer Service Portal, and we will address them with care. For immediate assistance with technical matters, you may also request support through the Technical Support Portal.

Thank you for your continued interest and valuable feedback.