Arrays of arrays

 Hello,

 May I ask if PostgreSQL supports arrays of arrays directly or 
 indirectly, or if such support is planned? I'm interested about pseudo 
 constructs like:
 1. Directly - (integer[4])[5] - this is equivalent to multidimensional 
 array, but may be differently represented on protocol serialization (as 
 array with array of elements).
 2. Indirectly - like create domain d as integer[6], d[11], or by any 
 other means.

 Currently, I think both of this, are unsupported and array should be 
 only base type. I ask about this, to create extend array support in 
 JDBC.

 Regards,
 Radek.