what is wrong with data type 'array' ?

hi, all:    When I tried the example from PostgreSQL guide as follows:CREATE
TABLE sal_emp (
    name            text,
    pay_by_quarter  integer[],
    schedule        text[][]
);   To my surprised, the table created actually isCREATE TABLE sal_emp (
    name            text,
    pay_by_quarter  integer[],
    schedule        text[]
);   I was wondering if PostgreSQL really supports multidimensional array
with more than tow dimensions? jack_dull