listmonk/internal/migrations/v0.4.0.go
Kailash Nadh 5a3664aee2 Add support for caching slow queries on large databases.
- Add materialized views for list -> subscriber counts, dashboard chart,
  and dashboard aggregate stats that slow down significantly on large
  databases (with millions or tens of millions of subscribers). These
  slow queries involve full table scan COUNTS().

- Add a toggle to enable caching slow results in Settings -> Performance.

- Add support for setting a cron string that crons and periodically
  refreshes aggregated stats in materialized views.

Closes #1019.
2024-01-27 15:51:12 +05:30

29 lines
787 B
Go

package migrations
import (
"log"
"github.com/jmoiron/sqlx"
"github.com/knadh/koanf/v2"
"github.com/knadh/stuffbin"
)
// V0_4_0 performs the DB migrations for v.0.4.0.
func V0_4_0(db *sqlx.DB, fs stuffbin.FileSystem, ko *koanf.Koanf, lo *log.Logger) error {
_, err := db.Exec(`
DO $$
BEGIN
IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'list_optin') THEN
CREATE TYPE list_optin AS ENUM ('single', 'double');
END IF;
IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'campaign_type') THEN
CREATE TYPE campaign_type AS ENUM ('regular', 'optin');
END IF;
END$$;
ALTER TABLE lists ADD COLUMN IF NOT EXISTS optin list_optin NOT NULL DEFAULT 'single';
ALTER TABLE campaigns ADD COLUMN IF NOT EXISTS type campaign_type DEFAULT 'regular';
`)
return err
}