Ingres uses the following types of Ingres environment variables/logicals:

Ingres environment variables are active only when you are using Ingres. Most are set in the symbol table and are visible only with the command ingprenv. A small subset can be reset by users in their local Windows environment.

Ingres environment variables are active only when you are using Ingres. Most are set in the symbol table and are visible only with the command ingprenv. A small subset can be reset by users in their local UNIX environment.

Ingres logicals are defined in the appropriate logical name table.

When the procedures in this appendix require you to check the value of a logical or environment variable, they instruct you to use the appropriate commands to check each level where the command can be set. For detailed information about setting and using logicals and environment variables, see the System Administrator Guide.