Hi,
On 2020-11-18 19:54:52 -0500, Chapman Flack wrote:
> On 11/18/20 19:46, David G. Johnston wrote:
>
> > I doubt there is any substantial resistance to including such a function
> > but it would have to be written in C.
>
> Would anything have to be written at all, save the CREATE AGGREGATE
>
Vik Fearing writes:
> On 11/19/20 1:54 AM, Chapman Flack wrote:
>> Would anything have to be written at all, save the CREATE AGGREGATE
>> suggested in the original message, using the existing array_cat as the
>> state transition function?
> Nope. As my example showed.
But by the same token,
On 11/19/20 1:54 AM, Chapman Flack wrote:
> On 11/18/20 19:46, David G. Johnston wrote:
>
>> I doubt there is any substantial resistance to including such a function
>> but it would have to be written in C.
>
> Would anything have to be written at all, save the CREATE AGGREGATE
> suggested in
On Wed, Nov 18, 2020 at 5:54 PM Chapman Flack wrote:
> On 11/18/20 19:46, David G. Johnston wrote:
>
> > I doubt there is any substantial resistance to including such a function
> > but it would have to be written in C.
>
> Would anything have to be written at all, save the CREATE AGGREGATE
>
On 11/18/20 19:46, David G. Johnston wrote:
> I doubt there is any substantial resistance to including such a function
> but it would have to be written in C.
Would anything have to be written at all, save the CREATE AGGREGATE
suggested in the original message, using the existing array_cat as
On Wed, Nov 18, 2020 at 5:37 PM Vik Fearing wrote:
> On 11/18/20 11:19 PM, David G. Johnston wrote:
> > On Wednesday, November 18, 2020, Vlad Bokov wrote:
> >
> >> Hi, I wonder why there's no function to aggregate arrays by
> >> concatenation out of the box?
> >>
> >
> > See array_agg(...)
>
>
nted.
vik=# select array_agg(a) from (values (array[1]), (array[2])) as v(a);
array_agg
---
{{1},{2}}
(1 row)
vik=# CREATE AGGREGATE array_cat (anyarray)
vik-# (
vik(# sfunc = array_cat,
vik(# stype = anyarray,
vik(# initcond = '{}'
vik(# );
CREATE AGGREGATE
vik=# select arra
On Wednesday, November 18, 2020, Vlad Bokov wrote:
> Hi, I wonder why there's no function to aggregate arrays by
> concatenation out of the box?
>
See array_agg(...)
David J.
Hi, I wonder why there's no function to aggregate arrays by
concatenation out of the box?
There is a usual function `array_cat(anyarray, anyarray)`, but it
doesn't seamlessly work with grouping.
Wouldn't it be natural to have this:
CREATE AGGREGATE array_cat (anyarray)
(
sfunc = array_cat
