unleash-server/dist/migrations/20251009132935-add-edge-node-presence.js

Unleash is an enterprise ready feature flag service. It provides different strategies for handling feature flags.

"use strict";
exports.up = function (db, cb) {
    db.runSql(`
          CREATE OR REPLACE FUNCTION bucket_edge_heartbeat(ts timestamptz)
          RETURNS timestamptz
          LANGUAGE SQL IMMUTABLE PARALLEL SAFE AS $$
            SELECT to_timestamp(floor(extract(epoch FROM ts) / 300) * 300) AT TIME ZONE 'UTC';
          $$;

          CREATE TABLE edge_node_presence (
            bucket_ts     timestamptz NOT NULL,
            node_ephem_id text        NOT NULL,
            PRIMARY KEY (bucket_ts, node_ephem_id)
          );

          CREATE INDEX edge_node_presence_brin ON edge_node_presence USING BRIN (bucket_ts);
          CREATE INDEX edge_node_presence_node_hash ON edge_node_presence USING HASH (node_ephem_id);

        `, cb);
};
exports.down = function (db, cb) {
    db.runSql(`
          DROP INDEX IF EXISTS edge_node_presence_brin;
          DROP INDEX IF EXISTS edge_node_presence_node_hash;
          DROP TABLE IF EXISTS edge_node_presence;
          DROP FUNCTION IF EXISTS bucket_edge_heartbeat(timestamptz);
        `, cb);
};
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