message: Support both START TRANSACTION and BEGIN TRANSACTION
diff: @@ -396,6 +396,7 @@ unique_ptr<TransactionStatement> TransformTransaction(Node *node) {
  assert(stmt);
  switch (stmt->kind) {
  case TRANS_STMT_BEGIN:
  + case TRANS_STMT_START:
  return make_unique<TransactionStatement>(
  TransactionType::BEGIN_TRANSACTION);
  case TRANS_STMT_COMMIT:
  