Re: Array Char/VarChar Size

Mr. Lane,
I used your suggestion and it works nicely. From a client perspective
I would prefer to see support for this type of information from the
JDBC for longevity, robustness, and isolation purposes. Currently
the JDBC returns only NULLs.

Again thanks guys, I appreciate the help.
danap.

>Kris Jurka <books@ejurka.com> writes:
>
>
>>> Multi-dimensional array information is not stored.  Every array type may
>>> be any number of dimensions.  The precision information is not available
>>> in the information_schema, but it is available in the system catalog
>>> tables.  See pg_attribute.atttypmod, but it does require some decoding.
>>
>>
>
>Rather than embedding knowledge of typmod encoding in client-side code,
>may I suggest using the format_type function?  For example
>
>select format_type(atttypid, atttypmod) from pg_attribute where
>attrelid = 'my_table'::regclass and attname = 'my_column';
>
>This will give you back something reasonably standardized, like
>"character varying(42)[]".  You'll still need a bit of logic to
>extract what you want, but it seems much less likely to break.
>
>            regards, tom lane
>