Improve transaction state detection logic

src/main/java/org/mybatis/spring/transaction/SpringManagedTransaction.java

@@ -76,12 +76,14 @@ public Connection getConnection() throws SQLException {
   private void openConnection() throws SQLException {
     this.connection = DataSourceUtils.getConnection(this.dataSource);
     this.autoCommit = this.connection.getAutoCommit();
-    this.isConnectionTransactional = DataSourceUtils.isConnectionTransactional(this.connection, this.dataSource);
+
+    boolean isInActiveTransaction = TransactionSynchronizationManager.isActualTransactionActive();
+    this.isConnectionTransactional = isInActiveTransaction &&
+      DataSourceUtils.isConnectionTransactional(this.connection, this.dataSource);
 
     LOGGER.debug(() -> "JDBC Connection [" + this.connection + "] will"
-        + (this.isConnectionTransactional ? " " : " not ") + "be managed by Spring");
+      + (this.isConnectionTransactional ? " " : " not ") + "be managed by Spring");
   }
-
   @Override
   public void commit() throws SQLException {
     if (this.connection != null && !this.isConnectionTransactional && !this.autoCommit) {