Re: Use multidimensional array as VALUES clause in insert

Hi Martin,

May be I don’t understand completely what are you trying to accomplish but based on your example bellow UNNEST function should do a magic for you, this is the example I wrote for your case:

create table if not exists foo(id int, arr text[]);
truncate table foo;
insert into foo values (1, '{"value1", "value2", "value3"}'), (2, '{"value21", "value22", "value23"}');

create table if not exists foo2(id int, val text);
truncate table foo2;

insert into foo2
select id, unnest(arr) from foo;

Is this what you trying to do?

Best,
-Igor

> On Aug 11, 2020, at 3:47 AM, Mike Martin <mike(at)redtux(dot)plus(dot)com> wrote:
>
> Is this possible? I have seen examples with array literals as VALUES string, but I cant seen to get it to work with an actual array.
>
> testing code
>
> --This gets me a multidimensional array
> with arr AS (
> SELECT ARRAY(SELECT ARRAY[fileid::text,tagname,array_to_string(tagvalue,E'\b')]
> FROM tagdata_all) -- limit 100)
> arr1
> )
> --Then
>
> INSERT INTO tagdatatest2
> SELECT arr1::text[] FROM arr --doesnt work only populates one column with original array
>