Re: BUG #8399: inconsistent input of multidimensional arrays

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On 01/31/2014 05:11 PM, Bruce Momjian wrote:
> On Tue, Aug 27, 2013 at 08:18:10AM +0000, borz_off@cs.msu.su
> wrote:
>> PostgreSQL documentation states:
>>
>> "Multidimensional arrays must have matching extents for each
>> dimension. A mismatch causes an error..."
>>
>>
>> This is not completely true: postgres=# select cast('{{1,2},
>> {3}}' as integer[]); ERROR:  multidimensional arrays must have
>> array expressions with matching dimensions LINE 1: select
>> cast('{{1,2}, {3}}' as integer[]); ^ postgres=# select
>> cast('{{1}, {2,3}}' as integer[]); int4 ------------------
>> {{1,NULL},{2,3}} (1 row)
>>
>>
>> Trying to use an array constructor yields an expected error in
>> both cases.

> Joe, does this sound right?

I believe back when that 2004 commit was made, arrays did not allow
NULL elements at all. So I guess this is an unintended side effect of,
or a latent bug exposed by, that change.

Let me take a closer look...

Joe

- --
Joe Conway
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