83 lines
2.3 KiB
MySQL
83 lines
2.3 KiB
MySQL
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--
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-- This file is part of TALER
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-- Copyright (C) 2014--2022 Taler Systems SA
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--
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-- TALER is free software; you can redistribute it and/or modify it under the
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-- terms of the GNU General Public License as published by the Free Software
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-- Foundation; either version 3, or (at your option) any later version.
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--
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-- TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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-- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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-- A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License along with
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-- TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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--
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CREATE OR REPLACE FUNCTION exchange_do_recoup_by_reserve(
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IN res_pub BYTEA
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)
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RETURNS TABLE
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(
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denom_sig BYTEA,
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denominations_serial BIGINT,
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coin_pub BYTEA,
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coin_sig BYTEA,
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coin_blind BYTEA,
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amount_val BIGINT,
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amount_frac INTEGER,
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recoup_timestamp BIGINT
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)
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LANGUAGE plpgsql
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AS $$
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DECLARE
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res_uuid BIGINT;
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blind_ev BYTEA;
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c_pub BYTEA;
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BEGIN
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SELECT reserve_uuid
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INTO res_uuid
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FROM exchange.reserves
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WHERE reserves.reserve_pub = res_pub;
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FOR blind_ev IN
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SELECT h_blind_ev
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FROM exchange.reserves_out_by_reserve
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WHERE reserves_out_by_reserve.reserve_uuid = res_uuid
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LOOP
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SELECT robr.coin_pub
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INTO c_pub
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FROM exchange.recoup_by_reserve robr
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WHERE robr.reserve_out_serial_id = (
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SELECT reserves_out.reserve_out_serial_id
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FROM exchange.reserves_out
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WHERE reserves_out.h_blind_ev = blind_ev
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);
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RETURN QUERY
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SELECT kc.denom_sig,
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kc.denominations_serial,
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rc.coin_pub,
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rc.coin_sig,
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rc.coin_blind,
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rc.amount_val,
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rc.amount_frac,
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rc.recoup_timestamp
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FROM (
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SELECT *
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FROM exchange.known_coins
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WHERE known_coins.coin_pub = c_pub
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) kc
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JOIN (
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SELECT *
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FROM exchange.recoup
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WHERE recoup.coin_pub = c_pub
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) rc USING (coin_pub);
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END LOOP;
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END;
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$$;
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COMMENT ON FUNCTION exchange_do_recoup_by_reserve
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IS 'Recoup by reserve as a function to make sure we hit only the needed partition and not all when joining as joins on distributed tables fetch ALL rows from the shards';
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