The SET SEARCH command establishes default qualifiers for
    subsequent SEARCH commands. The parameters that you specify with
    SET SEARCH have the same names as the qualifiers for the SEARCH
    command. The qualifiers determine whether the SEARCH command:
    (1)  searches for all occurrences of a string (ALL) or only the
    next occurrence (NEXT); and (2)  displays any occurrence of the
    string (STRING) or only those occurrences in which the string is
    not bounded on either side by a character that can be part of an
    identifier in the current language (IDENTIFIER).

    You can override the current SEARCH default for the duration of
    a single SEARCH command by specifying other qualifiers. Use the
    SHOW SEARCH command to identify the current SEARCH defaults.

    Related commands:

       SEARCH
       (SET,SHOW) LANGUAGE
       SHOW SEARCH