76 lines
2.8 KiB
MySQL
76 lines
2.8 KiB
MySQL
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--
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-- This file is part of TALER
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-- Copyright (C) 2021 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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-- Everything in one big transaction
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BEGIN;
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-- Check patch versioning is in place.
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SELECT _v.register_patch('exchange-0003', NULL, NULL);
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ALTER TABLE deposits
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ADD COLUMN shard INT4 NOT NULL DEFAULT 0;
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COMMENT ON COLUMN deposits.shard
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IS 'Used for load sharding. Should be set based on h_wire, merchant_pub and a service salt. Default of 0 onlyapplies for colums migrated from a previous version without sharding support. 64-bit value because we need an *unsigned* 32-bit value.';
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DROP INDEX deposits_get_ready_index;
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CREATE INDEX deposits_get_ready_index
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ON deposits
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(shard
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,tiny
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,done
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,wire_deadline
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,refund_deadline
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);
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COMMENT ON INDEX deposits_get_ready_index
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IS 'for deposits_get_ready';
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CREATE UNLOGGED TABLE IF NOT EXISTS revolving_work_shards
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(shard_serial_id BIGSERIAL UNIQUE
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,last_attempt INT8 NOT NULL
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,start_row INT4 NOT NULL
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,end_row INT4 NOT NULL
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,active BOOLEAN NOT NULL DEFAULT FALSE
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,job_name VARCHAR NOT NULL
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,PRIMARY KEY (job_name, start_row)
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);
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CREATE INDEX IF NOT EXISTS revolving_work_shards_index
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ON revolving_work_shards
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(job_name
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,active
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,last_attempt
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);
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COMMENT ON TABLE revolving_work_shards
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IS 'coordinates work between multiple processes working on the same job with partitions that need to be repeatedly processed; unlogged because on system crashes the locks represented by this table will have to be cleared anyway, typically using "taler-exchange-dbinit -s"';
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COMMENT ON COLUMN revolving_work_shards.shard_serial_id
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IS 'unique serial number identifying the shard';
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COMMENT ON COLUMN revolving_work_shards.last_attempt
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IS 'last time a worker attempted to work on the shard';
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COMMENT ON COLUMN revolving_work_shards.active
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IS 'set to TRUE when a worker is active on the shard';
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COMMENT ON COLUMN revolving_work_shards.start_row
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IS 'row at which the shard scope starts, inclusive';
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COMMENT ON COLUMN revolving_work_shards.end_row
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IS 'row at which the shard scope ends, exclusive';
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COMMENT ON COLUMN revolving_work_shards.job_name
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IS 'unique name of the job the workers on this shard are performing';
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-- Complete transaction
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COMMIT;
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