On Mon, 2002-05-27 at 16:30, Gregory Seidman wrote:
> Jani Averbach sez:
> } On Mon, 27 May 2002, dirk heitmann wrote:
> } > i have created a table with 1600 comlumns. Now i want
> } > to update some columns with new values:
> } > update db set col1=1 where col2=2;
> } >
> } > this generates the error-message:
> } > heap_formtuple: numberOfAttributes of 1601 > 1600.
> }
> } --8<--
> } Maximum number of columns in a table 1600
> } --8<--
> } http://www2.se.postgresql.org/users-lounge/limitations.html
>
> Which, while accurate, fails to answer the answer the question. A column is
> not being added. A table is not being created. Rows are being updated and
> the system is complaining that there are too many columns. Why?
>
Don't know what the answer is, but it would be interesting to confirm
whether PG thinks there are only 1600 columns. Try:
select relnatts from pg_class where relname='db';
I assume that says 1600? (I was wondering about catalogue changes such
as ADD COLUMN, but that does seem to check MaxHeapAttributeNumber)
Regards
John
--
John Gray
Azuli IT
www.azuli.co.uk