Re: Couldn't cast to record[]

On Thu, Mar 3, 2022 at 4:01 AM Suresh Kumar R
<suresh(dot)arsenal29(at)gmail(dot)com> wrote:
>
> Hi, I created an table with composite type array as datatype for one column.
> When I query that table I need the pg_typeof(column) as record[] instead of
> composite_type[].
> I tried creating a separate function and returning record[], but below error
> is thrown,
>
> ERROR: PL/pgSQL functions cannot return type record[]
>
> Below is sample for my requirement.
>
> pali=# create type address as (number bigint, city varchar);
> CREATE TYPE
> pali=# create table person(name varchar, addresses address[]);
> CREATE TABLE
> pali=# insert into person values ('Michael', array[(82, 'NYC'),(24,
> 'Dunkirk')]::address[]);
> INSERT 0 1
> pali=# select pg_typeof(addresses::record[]) from person ;
> pg_typeof
> -----------
> address[]
>
> Here I expect record[] instead of address[].

Why do you think you need this? If you need variant record storage,
you probably want to go to jsonb, then use jsonb_populate_recordset to
convert back to specific type.

merlin