"Dann Corbit" <DCorbit@connx.com> writes:
> Sorry. Brain seizure on my part. I meant NUMERIC data type.
Ah. In that case see src/include/utils/numeric.h, as well as the
comments near the head of src/backend/utils/adt/numeric.c. Briefly,
it's packed BCD floating point...
>> 2. Array type objects.
> See src/include/utils/array.h
regards, tom lane