Обсуждение: [GENERAL] Multidimentional array access
Hello,
I want to get the inner array in a multi dimentional array in a pl/pgsql procedure.for i in array_lower(Eg, 1) .. array_upper(Eg, 1)
array_value = Eg[i]
END LOOP;--
Regards :
Venktesh Guttedar.Hi
2016-12-09 16:05 GMT+01:00 VENKTESH GUTTEDAR <venkteshguttedar@gmail.com>:
postgres=# do
$$
declare i int; j int; a int[];
begin
a := ARRAY[[1,2],[3,4]];
for i in array_lower(a,1) .. array_upper(a,1)
loop
for j in array_lower(a,2)..array_upper(a,2)
loop
raise notice 'a[%,%]=%', i,j,a[i][j];
end loop;
end loop;
end;
$$;
NOTICE: a[1,1]=1
NOTICE: a[1,2]=2
NOTICE: a[2,1]=3
NOTICE: a[2,2]=4
DO
Time: 142,078 ms
Help would be appreciated.But Eg[i] is assigning null to array_valueLOOPEg : {{1,2,3,4,5,6,7},{11,22,33,44,Hello,I want to get the inner array in a multi dimentional array in a pl/pgsql procedure.55,66,77}}
for i in array_lower(Eg, 1) .. array_upper(Eg, 1)array_value = Eg[i]END LOOP;
postgres=# do
$$
declare i int; j int; a int[];
begin
a := ARRAY[[1,2],[3,4]];
for i in array_lower(a,1) .. array_upper(a,1)
loop
for j in array_lower(a,2)..array_upper(a,2)
loop
raise notice 'a[%,%]=%', i,j,a[i][j];
end loop;
end loop;
end;
$$;
NOTICE: a[1,1]=1
NOTICE: a[1,2]=2
NOTICE: a[2,1]=3
NOTICE: a[2,2]=4
DO
Time: 142,078 ms
What is your PostgreSQL version?
Regards
Pavel
--Regards :Venktesh Guttedar.
VENKTESH GUTTEDAR <venkteshguttedar@gmail.com> writes:
> I want to get the inner array in a multi dimentional array in a
> pl/pgsql procedure.
> Eg : {{1,2,3,4,5,6,7},{11,22,33,44,55,66,77}}
> for i in array_lower(Eg, 1) .. array_upper(Eg, 1)
> LOOP
> array_value = Eg[i]
> END LOOP;
> But Eg[i] is assigning null to array_value
I think you want
array_value = Eg[i][array_lower(Eg, 2):array_upper(Eg, 2)]
As of 9.6 you could use the shorthand
array_value = Eg[i][:]
regards, tom lane
On 09/12/16 15:30, Tom Lane wrote: > As of 9.6 you could use the shorthand > > array_value = Eg[i][:] > > regards, tom lane I hadn't spotted that - very handy - will go and read up on it. :-) Ray. -- Raymond O'Donnell :: Galway :: Ireland rod@iol.ie