Ingres has a set of available logical names through which you can define various file names and other values. For an alphabetical list of the basic Ingres environment variables and logicals, see the appendix “Environment Variables and Logicals.”

Ingres uses the following types of operating-system dependent environment variables and logicals:

Ingres environment variables in UNIX and Windows are active only when you are using Ingres. A small subset of these environment variables can be reset in the local environment by the user.

Ingres logicals are defined in the appropriate logical name table.