Create an SQL table.

def _initialize(self, chain, length):
        """Create an SQL table.
        """

        if self._getfunc is None:
            self._getfunc = self.db.model._funs_to_tally[self.name]

        # Determine size
        try:
            self._shape = np.shape(self._getfunc())
        except TypeError:
            self._shape = None

        self._vstr = ', '.join(var_str(self._shape))

        # If the table already exists, exit now.
        if chain != 0:
            return

        # Create the variable name strings.
        vstr = ', '.join(v + ' FLOAT' for v in var_str(self._shape))
        query = """CREATE TABLE IF NOT EXISTS [%s]
                     (recid INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
                      trace  int(5), %s)""" % (self.name, vstr)
        self.db.cur.execute(query)