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From: Igor Andriychuk <2.andriychuk@gmail.com>
To: Mike Martin <mike@redtux.plus.com>
Cc: pgsql-sql <pgsql-sql@lists.postgresql.org>
Subject: Re: Use multidimensional array as VALUES clause in insert
Date: Tue, 11 Aug 2020 07:43:04 -0700
Message-ID: <AB2B9679-1B23-4354-94DD-2B4AF7538F13@gmail.com> (raw)
In-Reply-To: <CAOwYNKbE7OSDscT5uJX6ruW8XpupmbG9-msrVhqpOhkBYPUVyg@mail.gmail.com>
References: <CAOwYNKbE7OSDscT5uJX6ruW8XpupmbG9-msrVhqpOhkBYPUVyg@mail.gmail.com>

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@redtux.plus.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
> 

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