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Oracle® Database Reference
12c Release 1 (12.1)

E17615-23
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NLS_COMP

Property Description
Parameter type String
Syntax NLS_COMP = { BINARY | LINGUISTIC | ANSI }
Default value BINARY
Modifiable ALTER SESSION
Basic No

NLS_COMP specifies the collation behavior of the database session.

Values:

Note:

Unless you explicitly set the value for NLS_COMP in your initialization parameter file, a default value of NULL is shown in the following views: V$PARAMETER, V$SYSTEM_PARAMETER, V$PARAMETER2, V$SYSTEM_PARAMETER2, and NLS_INSTANCE_PARAMETERS. However, the actual default value, and behavior, is BINARY. Note that you cannot change the default to NULL, because NULL is not among the valid values.

Note:

The value of this initialization parameter NLS_COMP is used to initialize the session value of this parameter, which is the actual value referenced by the SQL query processing. This initial value is overridden by a client-side value if the client uses the Oracle JDBC driver or if the client is OCI-based and the NLS_LANG client setting (environment variable) is defined. The initialization parameter value is, therefore, usually ignored.

See Also:

Oracle Database Globalization Support Guide for more information on setting this parameter