def show_keyword_help(cur, arg):
keyword = arg.strip('<STR_LIT:">').strip("<STR_LIT:'>")<EOL>query = "<STR_LIT>".format(keyword)<EOL>log.debug(query)<EOL>cur.execute(query)<EOL>if cur.description and cur.rowcount > <NUM_LIT:0>:<EOL><INDENT>headers = [x[<NUM_LIT:0>] for x in cur.description]<EOL>return [(None, cur.fetchall(), headers, '<STR_LIT>')]<EOL><DEDENT>else:<EOL><INDENT>return [(None, None, None, '<STR_LIT>'.format(keyword))]<EOL><DEDENT>
Call the built-in "show <command>", to display help for an SQL keyword.
:param cur: cursor
:param arg: string
:return: list