Avoid conversion of compound types to text - postgresql

Question

My compound types when returned from PLPGSQL function are converted to text:
dev=# select * from app.user_query_test(3);
user_record | udata_record
-----------------+-------------------
(3,875227490,t) | (3,3,"Bob Smith")
(1 row)
dev=#
I don't want this, I want to receive them on the client side as nested object of data, like this:
{
"user_record": {
"user_id": 3,
"identity_id": 875227490,
"utype": t
},
"udata_record": {
"udata_id": 3,
"user_id": 3,
"full_name": "Bob Smith"
}
}
But, I also don't want JSON, because decoding/encoding to JSON format will require processing time and will affect the performance of my App. So how do I achieve this? I mean how do I put the data on the Client in the exact structure as it is returned by PLPGSQL function without any decoding/encoding process?
My source files are:
DROP TYPE IF EXISTS app.user_reply_t CASCADE;
CREATE TYPE app.user_reply_t AS (
user_id integer,
identity_id integer,
utype boolean
);
DROP TYPE IF EXISTS app.udata_reply_t CASCADE;
CREATE TYPE app.udata_reply_t AS (
udata_id integer,
user_id integer,
full_name varchar(64)
);
DROP TYPE IF EXISTS app.user_info_t CASCADE;
CREATE TYPE app.user_info_t AS (
user_record app.user_reply_t,
udata_record app.udata_reply_t
);
CREATE OR REPLACE FUNCTION app.user_query_test(p_user_id integer)
RETURNS app.user_info_t AS
$$
DECLARE
rec app.user_info_t;
BEGIN
SELECT user_id,identity_id,utype FROM "comp-158572724".users WHERE user_id=p_user_id INTO rec.user_record;
SELECT udata_id,user_id,full_name FROM "comp-158572724".udata WHERE user_id=p_user_id INTO rec.udata_record;
RETURN rec;
END;
$$ LANGUAGE plpgsql;
Tested with Node.js:
src $ node usertest.js
result={ command: 'SELECT',
rowCount: 1,
rows:
[ { user_record: '(3,875227490,t)',
udata_record: '(3,3,"Bob Smith")' } ],
fields:
[ { name: 'user_record', dataTypeID: 19862 },
{ name: 'udata_record', dataTypeID: 19865 } ] }
^C
src $
Source of Client code:
src $ cat usertest.js
const util = require('util');
pg = require('pg').native
var Pool = pg.Pool
var Client = pg.Client
var pool=new Pool({
user: 'dev_user',
password: 'dev',
host: 'localhost',
database: 'dev'
});
pool.query('select * from app.user_query_test(3)',function(err, result) {
console.log('result=' + util.inspect(result));
}
);
function wait() {
console.log('wating...');
setTimeout(wait,3000);
}
setTimeout(wait,3000);
src $