61 lines
2.3 KiB
MySQL
61 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 UNLOGGED TABLE IF NOT EXISTS revolving_work_shards
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(shard_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY 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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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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CREATE INDEX IF NOT EXISTS revolving_work_shards_by_job_name_active_last_attempt_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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INSERT INTO exchange_tables
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(name
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,version
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,action
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,partitioned
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,by_range)
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VALUES
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('revolving_work_shards'
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,'exchange-0002'
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,'create'
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,FALSE
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,FALSE);
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