diff options
Diffstat (limited to 'src/exchangedb/0002-revolving_work_shards.sql')
| -rw-r--r-- | src/exchangedb/0002-revolving_work_shards.sql | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/exchangedb/0002-revolving_work_shards.sql b/src/exchangedb/0002-revolving_work_shards.sql new file mode 100644 index 000000000..8cfff09b4 --- /dev/null +++ b/src/exchangedb/0002-revolving_work_shards.sql @@ -0,0 +1,46 @@ +-- +-- 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 UNLOGGED TABLE revolving_work_shards + (shard_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY UNIQUE + ,last_attempt INT8 NOT NULL + ,start_row INT4 NOT NULL + ,end_row INT4 NOT NULL + ,active BOOLEAN NOT NULL DEFAULT FALSE + ,job_name TEXT NOT NULL + ,PRIMARY KEY (job_name, start_row) + ); +COMMENT ON TABLE revolving_work_shards + 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"'; +COMMENT ON COLUMN revolving_work_shards.shard_serial_id + IS 'unique serial number identifying the shard'; +COMMENT ON COLUMN revolving_work_shards.last_attempt + IS 'last time a worker attempted to work on the shard'; +COMMENT ON COLUMN revolving_work_shards.active + IS 'set to TRUE when a worker is active on the shard'; +COMMENT ON COLUMN revolving_work_shards.start_row + IS 'row at which the shard scope starts, inclusive'; +COMMENT ON COLUMN revolving_work_shards.end_row + IS 'row at which the shard scope ends, exclusive'; +COMMENT ON COLUMN revolving_work_shards.job_name + IS 'unique name of the job the workers on this shard are performing'; + +CREATE INDEX revolving_work_shards_by_job_name_active_last_attempt_index + ON revolving_work_shards + (job_name + ,active + ,last_attempt + ); |