This chapter describes how to implement the following customization options that are available in Ingres:
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Ingres supports read-in character sets. This feature allows you to use a character set other than the default character set at your installation.
For example, in Thailand, the standard character set is Thai TIS. If you specify the THAI character set during the installation procedure, users at your installation will save and retrieve data using this character set.
The installation utility prompts you with a list of currently supported character sets for your platform. It sets the environment variable or logical for II_CHARSETxx to the value you have selected, unless the default character set is chosen. If the default character set is chosen, II_CHARSETxx is not set.
Important! Choose your character set carefully. An installation can use only one character set. Do not change the character set because data in existing databases can be corrupted.
After running the install program, check the value of II_CHARSETxx. If II_CHARSETxx is set incorrectly, you must run the installation program again.
For a complete list of supported character sets, see the Installation Guide. For a list of the character sets available on your platform, see the online list selection during installation.
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The default character sets are as follows:
Windows: WIN1252
UNIX: ISO-8859/1
VMS: DEC Multinational
DEC Multinational and ISO-8859/1 are extended ASCII character sets. They have identical definitions for the 128 7-bit characters. They differ only in the defaults they assign for several of the 128 additional characters in the 8-bit character set.