-- IM Kafka foundation tables for tenant databases.
-- Date: 2026-08-26
-- Scope: run once in every tenant business database, such as tinode.
-- Notes:
--   * Do not run in hotgo. Admin/HotGo side needs its own admin_command tables.
--   * Kafka consume idempotency/retry state is Redis-backed; MySQL only keeps manual dead letters.

DROP TABLE IF EXISTS im_kafka_consume_log;

CREATE TABLE IF NOT EXISTS im_kafka_dead_letters (
  id BIGINT NOT NULL AUTO_INCREMENT,
  dead_id VARCHAR(96) NOT NULL,
  event_id VARCHAR(96) NOT NULL,
  parent_event_id VARCHAR(96) NOT NULL DEFAULT '',
  source_topic VARCHAR(128) NOT NULL,
  consumer_group VARCHAR(128) NOT NULL,
  event_type VARCHAR(96) NOT NULL DEFAULT '',
  biz_type VARCHAR(64) NOT NULL DEFAULT '',
  biz_id VARCHAR(128) NOT NULL DEFAULT '',
  envelope JSON NOT NULL,
  retry_count INT NOT NULL DEFAULT 0,
  last_reason VARCHAR(64) NOT NULL DEFAULT '',
  last_error VARCHAR(1000) NOT NULL DEFAULT '',
  status VARCHAR(24) NOT NULL DEFAULT 'dead',
  replay_count INT NOT NULL DEFAULT 0,
  resolved_by VARCHAR(64) NOT NULL DEFAULT '',
  resolved_at DATETIME(3),
  resolve_note VARCHAR(1000) NOT NULL DEFAULT '',
  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
  PRIMARY KEY(id),
  UNIQUE INDEX uk_im_kafka_dead_letters_dead(dead_id),
  INDEX idx_im_kafka_dead_letters_event(event_id),
  INDEX idx_im_kafka_dead_letters_status(status, created_at),
  INDEX idx_im_kafka_dead_letters_biz(biz_type, biz_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;