<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def create_dump():
 """ Create the grammar for the 'dump' statement """

    dump = upkey("dump").setResultsName("action")
    return (
        dump
        + upkey("schema")
        + Optional(Group(delimitedList(table)).setResultsName("tables"))
    )