--
-- This file is part of TALER
-- Copyright (C) 2014--2022 Taler Systems SA
--
-- TALER is free software; you can redistribute it and/or modify it under the
-- terms of the GNU General Public License as published by the Free Software
-- Foundation; either version 3, or (at your option) any later version.
--
-- TALER is distributed in the hope that it will be useful, but WITHOUT ANY
-- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
-- A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License along with
-- TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
--


CREATE OR REPLACE FUNCTION create_table_contracts(
  IN shard_suffix VARCHAR DEFAULT NULL
)
RETURNS VOID
LANGUAGE plpgsql
AS $$
DECLARE
  table_name VARCHAR DEFAULT 'contracts';
BEGIN

  PERFORM create_partitioned_table(
    'CREATE TABLE IF NOT EXISTS %I '
      '(contract_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY' --UNIQUE
      ',purse_pub BYTEA NOT NULL CHECK (LENGTH(purse_pub)=32)'
      ',pub_ckey BYTEA NOT NULL CHECK (LENGTH(pub_ckey)=32)'
      ',contract_sig BYTEA NOT NULL CHECK (LENGTH(contract_sig)=64)'
      ',e_contract BYTEA NOT NULL'
      ',purse_expiration INT8 NOT NULL'
      ',PRIMARY KEY (purse_pub)'
    ') %s ;'
    ,table_name
    ,'PARTITION BY HASH (purse_pub)'
    ,shard_suffix
  );

END
$$;

CREATE OR REPLACE FUNCTION add_constraints_to_contracts_partition(
  IN partition_suffix VARCHAR
)
RETURNS VOID
LANGUAGE plpgsql
AS $$
BEGIN
  EXECUTE FORMAT (
    'ALTER TABLE contracts_' || partition_suffix || ' '
      'ADD CONSTRAINT contracts_' || partition_suffix || '_contract_serial_id_key '
        'UNIQUE (contract_serial_id) '
  );
END
$$;
