Subject: Re: Use multidimensional array as VALUES clause in insert
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From: Thomas Kellerer <shammat@gmx.net>
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Date: Tue, 11 Aug 2020 16:08:32 +0200
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Mike Martin schrieb am 11.08.2020 um 12:50:
> Is this possible? I have seen examples with array literals as VALUES str=
ing, 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=C2=A0 tagdatatest2
> SELECT =C2=A0arr1::text[] FROM arr --doesnt work only populates one colu=
mn with original array

I don't understand why you aggregate in the first place if you want to the=
 insert the array elements as rows.

Can't you just do:

   INSERT INTO  tagdatatest2 (fileid, tagname, tagvalue)
   SELECT fileid, tagname, array_to_string(tagvalue,E'\b')
   FROM tagdata_all