Amazon.CognitoSync.SyncManager.Internal.SQLiteLocalStorage.SetupDatabase C# (CSharp) Метод

        private void SetupDatabase()
        {
            SQLitePCL.Batteries.Init();

            string dbPath = Path.Combine(PCLStorage.FileSystem.Current.LocalStorage.Path, DB_FILE_NAME);

            var r = Sqlite3.sqlite3_open(dbPath, out Handle);

            string createDatasetTable = "CREATE TABLE IF NOT EXISTS " + TABLE_DATASETS + "("
                        + DatasetColumns.IDENTITY_ID + " TEXT NOT NULL,"
                        + DatasetColumns.DATASET_NAME + " TEXT NOT NULL,"
                        + DatasetColumns.CREATION_TIMESTAMP + " TEXT DEFAULT '0',"
                        + DatasetColumns.LAST_MODIFIED_TIMESTAMP + " TEXT DEFAULT '0',"
                        + DatasetColumns.LAST_MODIFIED_BY + " TEXT,"
                        + DatasetColumns.STORAGE_SIZE_BYTES + " INTEGER DEFAULT 0,"
                        + DatasetColumns.RECORD_COUNT + " INTEGER DEFAULT 0,"
                        + DatasetColumns.LAST_SYNC_COUNT + " INTEGER NOT NULL DEFAULT 0,"
                        + DatasetColumns.LAST_SYNC_TIMESTAMP + " INTEGER DEFAULT '0',"
                        + DatasetColumns.LAST_SYNC_RESULT + " TEXT,"
                        + "UNIQUE (" + DatasetColumns.IDENTITY_ID + ", "
                        + DatasetColumns.DATASET_NAME + ")"
                        + ")";

            if(r != Sqlite3.SQLITE_OK)
            {
                throw Sqlite3Exception.New((Result)Enum.Parse(typeof(Result),r.ToString()), string.Format("Could not open database file: {0} ({1})", dbPath, r));
            }

            Execute(createDatasetTable);

            string createRecordsTable = "CREATE TABLE IF NOT EXISTS " + TABLE_RECORDS + "("
                        + RecordColumns.IDENTITY_ID + " TEXT NOT NULL,"
                        + RecordColumns.DATASET_NAME + " TEXT NOT NULL,"
                        + RecordColumns.KEY + " TEXT NOT NULL,"
                        + RecordColumns.VALUE + " TEXT,"
                        + RecordColumns.SYNC_COUNT + " INTEGER NOT NULL DEFAULT 0,"
                        + RecordColumns.LAST_MODIFIED_TIMESTAMP + " TEXT DEFAULT '0',"
                        + RecordColumns.LAST_MODIFIED_BY + " TEXT,"
                        + RecordColumns.DEVICE_LAST_MODIFIED_TIMESTAMP + " TEXT DEFAULT '0',"
                        + RecordColumns.MODIFIED + " INTEGER NOT NULL DEFAULT 1,"
                        + "UNIQUE (" + RecordColumns.IDENTITY_ID + ", " + RecordColumns.DATASET_NAME
                        + ", " + RecordColumns.KEY + ")"
                        + ")";

            Execute(createRecordsTable);
        }