Specifies a wildcard character. If you use the * (asterisk)
    wildcard character, SQL includes in the editing buffer the number
    of statements specified in the last SET EDIT KEEP statement.
    If you do not use the SET EDIT KEEP statement, EDIT * puts the
    last 20 statements in your editing buffer. If you omit the *
    (asterisk) wildcard character, SQL includes the last statement
    issued in the editing buffer.