내장 Sqlite3 데이터베이스 어댑터 스키마

CREATE TABLE IF NOT EXISTS documents (
  id TEXT PRIMARY KEY,
  type TEXT NOT NULL,
  version INTEGER NOT NULL,
  snapshot_version INTEGER NOT NULL
);

CREATE TABLE IF NOT EXISTS operations (
  doc_id TEXT NOT NULL,
  version INTEGER NOT NULL,
  operation TEXT NOT NULL,
  PRIMARY KEY (doc_id, version),
  FOREIGN KEY (doc_id) REFERENCES documents (id) ON DELETE CASCADE
);

CREATE TABLE IF NOT EXISTS snapshot_fragments (
  doc_id TEXT NOT NULL,
  fragment_id TEXT NOT NULL,
  data TEXT NOT NULL,
  PRIMARY KEY (doc_id, fragment_id),
  FOREIGN KEY (doc_id) REFERENCES documents (id) ON DELETE CASCADE
);