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Change id generation algorithm, display notifications total on the main page

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This commit is contained in:
Maksim Eltyshev 2019-10-10 02:51:54 +05:00
parent 4911816734
commit e8139b29d5
86 changed files with 264 additions and 159 deletions
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26
server/db/migrations/20180721020022_create_next_id_function.js Normal file
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module.exports.up = knex => knex.raw(`
CREATE SEQUENCE next_id_seq;
CREATE FUNCTION next_id(OUT id BIGINT) AS $$
DECLARE
shard INT := 1;
epoch BIGINT := 1567191600000;
sequence BIGINT;
milliseconds BIGINT;
BEGIN
SELECT nextval('next_id_seq') % 1024 INTO sequence;
SELECT FLOOR(EXTRACT(EPOCH FROM clock_timestamp()) * 1000) INTO milliseconds;
id := (milliseconds - epoch) << 23;
id := id | (shard << 10);
id := id | (sequence);
END;
$$ LANGUAGE PLPGSQL;
`);
module.exports.down = knex => knex.raw(`
DROP SEQUENCE next_id_seq;
DROP FUNCTION next_id(OUT id BIGINT);
`);