push array to array
I would like to push an array at the end of an array. Like:
'{{4,5},{8,3}}' + '{3,6}' > '{{4,5},{8,3},{3,6}}'
Is there an easy way to do? (i have version "9.1.23" on my shared hosting)
Now I have written a complex function with EXECUTE command-string...
CREATE OR REPLACE FUNCTION push_2d_array(numeric[],numeric[]) RETURNS
numeric[] AS $$
DECLARE
_str text;
_arr numeric[];
BEGIN
IF $1 IS NULL THEN
RETURN ARRAY[$2];
ELSE
_str := 'SELECT ARRAY[';
FOR i in 1..array_upper($1,1) LOOP
IF i > 1 THEN _str := _str || ','; END IF;
_str := _str || 'ARRAY[' || $1[i][1] || ',' || $1[i][2] || ']';
END LOOP;
_str := _str || ', ARRAY[' || $2[1] || ',' || $2[2] || ']]';
EXECUTE _str INTO _arr ;
RETURN _arr;
END IF;
END
$$ LANGUAGE plpgsql;
--
+31 6 29401726
tjibbe@rijpma.org
Hi
2016-09-18 18:46 GMT+02:00 Tjibbe <tjibbe@rijpma.org>:
'{{4,5},{8,3}}' + '{3,6}'
postgres=# select '{{4,5},{8,3}}'::int[] || ARRAY[[3,6]];
+---------------------+
| ?column? |
+---------------------+
| {{4,5},{8,3},{3,6}} |
+---------------------+
(1 row)
regards
Pavel
2016-09-18 19:12 GMT+02:00 Pavel Stehule <pavel.stehule@gmail.com>:
Hi
2016-09-18 18:46 GMT+02:00 Tjibbe <tjibbe@rijpma.org>:
'{{4,5},{8,3}}' + '{3,6}'
postgres=# select '{{4,5},{8,3}}'::int[] || ARRAY[[3,6]];
+---------------------+
| ?column? |
+---------------------+
| {{4,5},{8,3},{3,6}} |
+---------------------+
(1 row)
CREATE OR REPLACE FUNCTION public.array2d_append(integer[], integer[])
RETURNS integer[]
LANGUAGE sql
AS $function$
SELECT COALESCE($1 || ARRAY[$2], $1, $2);
$function$
postgres=# SELECT array2d_append('{{4,5},{8,3}}', '{3,6}');
+---------------------+
| array2d_append |
+---------------------+
| {{4,5},{8,3},{3,6}} |
+---------------------+
(1 row)
Show quoted text
regards
Pavel
2016-09-18 19:15 GMT+02:00 Pavel Stehule <pavel.stehule@gmail.com>:
2016-09-18 19:12 GMT+02:00 Pavel Stehule <pavel.stehule@gmail.com>:
Hi
2016-09-18 18:46 GMT+02:00 Tjibbe <tjibbe@rijpma.org>:
'{{4,5},{8,3}}' + '{3,6}'
postgres=# select '{{4,5},{8,3}}'::int[] || ARRAY[[3,6]];
+---------------------+
| ?column? |
+---------------------+
| {{4,5},{8,3},{3,6}} |
+---------------------+
(1 row)CREATE OR REPLACE FUNCTION public.array2d_append(integer[], integer[])
RETURNS integer[]
LANGUAGE sql
AS $function$
SELECT COALESCE($1 || ARRAY[$2], $1, $2);
$function$
sorry
better
SELECT COALESCE($1 || ARRAY[$2], $1, ARRAY[$2]);
Show quoted text
postgres=# SELECT array2d_append('{{4,5},{8,3}}', '{3,6}');
+---------------------+
| array2d_append |
+---------------------+
| {{4,5},{8,3},{3,6}} |
+---------------------+
(1 row)regards
Pavel