pluck method
Returns a single column values as list.
Implementation
@override
Future<List<dynamic>> pluck(String column) async {
final originalColumns = List.from(_columns);
_columns = [column];
final sql = grammar.compileSelect(_getQueryComponents());
_columns = originalColumns; // Restore
final result = await connection.execute(sql, bindings);
return result.data.map((row) => row[column]).toList();
}