--
-- 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_refresh_commitments(
  IN shard_suffix VARCHAR DEFAULT NULL
)
RETURNS VOID
LANGUAGE plpgsql
AS $$
DECLARE
  table_name VARCHAR DEFAULT 'refresh_commitments';
BEGIN

  PERFORM create_partitioned_table(
    'CREATE TABLE IF NOT EXISTS %I'
      '(melt_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY' -- UNIQUE'
      ',rc BYTEA PRIMARY KEY CHECK (LENGTH(rc)=64)'
      ',old_coin_pub BYTEA NOT NULL' -- REFERENCES known_coins (coin_pub) ON DELETE CASCADE'
      ',old_coin_sig BYTEA NOT NULL CHECK(LENGTH(old_coin_sig)=64)'
      ',amount_with_fee_val INT8 NOT NULL'
      ',amount_with_fee_frac INT4 NOT NULL'
      ',noreveal_index INT4 NOT NULL'
    ') %s ;'
    ,table_name
    ,'PARTITION BY HASH (rc)'
    ,shard_suffix
  );

  table_name = concat_ws('_', table_name, shard_suffix);

  -- Note: index spans partitions, may need to be materialized.
  EXECUTE FORMAT (
    'CREATE INDEX IF NOT EXISTS ' || table_name || '_by_old_coin_pub_index '
    'ON ' || table_name || ' '
    '(old_coin_pub);'
  );

END
$$;

CREATE OR REPLACE FUNCTION add_constraints_to_refresh_commitments_partition(
  IN partition_suffix VARCHAR
)
RETURNS void
LANGUAGE plpgsql
AS $$
BEGIN
  EXECUTE FORMAT (
    'ALTER TABLE refresh_commitments_' || partition_suffix || ' '
      'ADD CONSTRAINT refresh_commitments_' || partition_suffix || '_melt_serial_id_key '
        'UNIQUE (melt_serial_id)'
  );
END
$$;