Обсуждение: Problems with array

Hello there!

I'm using postgresql 7.2.1.

I have a table and I need to create a type array field,  this field must
 have two dimensions, but when I alter the table, only create the field
with one dimension.

I do this:

alter table one_table add column column_added numeric[][];

And the table is altered, but when I get the description of this, only
one dimension of the array is defined.

Something is wrong or in the definition of an array only shows one
dimension whatever it has?

Tnanks in advance!

Salut.

Sonia

sonia sanchez diaz <geek24@avantel.net> writes:
> Something is wrong or in the definition of an array only shows one
> dimension whatever it has?

Yup, an array column is just an array column, there isn't any
enforcement of a specific number of dimensions.  Putting extra []'s in
the declaration is just syntactic sugar.

            regards, tom lane

At 09:52 AM 8/23/02 , Tom Lane wrote:
>Yup, an array column is just an array column, there isn't any enforcement
>of a specific number of dimensions.  Putting extra []'s in the declaration
>is just syntactic sugar.

Just the same as in the C language.  Multi-dimensional arrays are just
special case pointer arithmetic on a single string of bytes.


         -crl
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Chad R. Larson (CRL22)    chad@eldocomp.com
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