Postgres 13

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CREATE TABLE accounts (
  id bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
  created_at timestamptz NOT NULL DEFAULT CURRENT_TIMESTAMP,
  login text NOT NULL,
  password text NOT NULL,
  email text
);

CREATE TYPE account_init AS (
  login text,
  password text,
  email text
);

CREATE TABLE



CREATE TYPE


CREATE FUNCTION get_accounts(
  pagination_limit bigint DEFAULT 25,
  pagination_offset bigint DEFAULT 0,
  account_ids bigint[] DEFAULT NULL
)
RETURNS TABLE (
  id bigint,
  created_at timestamptz,
  login text,
  password text,
  email text
)
LANGUAGE SQL
AS $BODY$
  WITH input_accounts AS (
    SELECT
      id,
      created_at,
      login,
      password,
      email
    FROM
      accounts
    WHERE
      account_ids IS NULL OR id = ANY (account_ids)
    ORDER BY
      id
    LIMIT pagination_limit
    OFFSET pagination_offset
  )
  SELECT
    id,
    created_at,
    login,
    password,
    email
  FROM
    input_accounts
  ORDER BY
    id
$BODY$;

CREATE FUNCTION


CREATE FUNCTION create_accounts(
  account_inits account_init[]
)
RETURNS TABLE (
  id bigint,
  created_at timestamptz,
  login text,
  password text,
  email text
)
LANGUAGE SQL
AS $BODY$
  WITH new_accounts AS (
    INSERT INTO accounts ( 
      login, 
      password, 
      email 
    )
    SELECT 
      login, 
      password, 
      email
    FROM 
      unnest(account_inits)
    RETURNING
      id
  )
  SELECT
    id,
    created_at,
    login,
    password,
    email
  FROM
    get_accounts(
      NULL,
      NULL,
      ARRAY(
        SELECT
          id
        FROM
          new_accounts
      )
    )
  ORDER BY
    id
$BODY$;

CREATE FUNCTION


/*
  Tests.
*/

--- insert data
WITH input_inits AS (
  SELECT
    login,
    password,
    email
  FROM
    -- assume this is `${account_inits}` interpolation
    json_to_recordset(
      '[{"login":"EC4A42323F", "password": "3DF1542F23A29B73281EEC5EBB55FFE18C253A7E800E7A541B"},{"login":"1D771C1E52", "password": "2817029563CC722FBC3D53F9F29F0000898F9843518D882E4A", "email": "a@b"},{"login":"FB66381D3A", "password": "C8F865AC1D54CFFA56DEBDEEB671C8EF110991BBB3B9EE57D2", "email": null}]'
    ) AS input_init(
      login text,
      password text,
      email text
    )
),
input_data AS (
  SELECT
    array_agg(
      CAST (
        (
          login,
          password,
          email
        ) AS account_init
      )
    ) AS account_inits
  FROM
    input_inits
)
SELECT
  new_accounts.id,
  new_accounts.created_at,
  new_accounts.login,
  new_accounts.password,
  new_accounts.email
FROM
  input_data
  CROSS JOIN
  create_accounts(input_data.account_inits) AS new_accounts
ORDER BY
  new_accounts.id ASC
;


id
created_at
login
password
email


1
2022-10-20 09:46:00.489996+01
EC4A42323F
3DF1542F23A29B73281EEC5EBB55FFE18C253A7E800E7A541B
null

2
2022-10-20 09:46:00.489996+01
1D771C1E52
2817029563CC722FBC3D53F9F29F0000898F9843518D882E4A
a@b

3
2022-10-20 09:46:00.489996+01
FB66381D3A
C8F865AC1D54CFFA56DEBDEEB671C8EF110991BBB3B9EE57D2
null



SELECT 3

id	created_at	login	password	email
1	2022-10-20 09:46:00.489996+01	EC4A42323F	3DF1542F23A29B73281EEC5EBB55FFE18C253A7E800E7A541B	null
2	2022-10-20 09:46:00.489996+01	1D771C1E52	2817029563CC722FBC3D53F9F29F0000898F9843518D882E4A	a@b
3	2022-10-20 09:46:00.489996+01	FB66381D3A	C8F865AC1D54CFFA56DEBDEEB671C8EF110991BBB3B9EE57D2	null