change

src/connector/jdbc/src/main/java/com/taosdata/jdbc/AbstractConnection.java

@@ -109,6 +109,18 @@ public abstract class AbstractConnection extends WrapperImpl implements Connecti
     public void setTransactionIsolation(int level) throws SQLException {
         if (isClosed())
             throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        switch (level) {
+            case Connection.TRANSACTION_NONE:
+                break;
+            case Connection.TRANSACTION_READ_UNCOMMITTED:
+            case Connection.TRANSACTION_READ_COMMITTED:
+            case Connection.TRANSACTION_REPEATABLE_READ:
+            case Connection.TRANSACTION_SERIALIZABLE:
+                throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
+            default:
+                throw new SQLException(TSDBConstants.INVALID_VARIABLES);
+        }
         //do nothing
     }
 

src/connector/jdbc/src/test/java/com/taosdata/jdbc/TSDBConnectionTest.java

@@ -122,6 +122,7 @@ public class TSDBConnectionTest {
 
     @Test
     public void getCatalog() throws SQLException {
+        conn.setCatalog("log");
         Assert.assertEquals("log", conn.getCatalog());
     }
 
@@ -129,7 +130,6 @@ public class TSDBConnectionTest {
     public void setTransactionIsolation() throws SQLException {
         conn.setTransactionIsolation(Connection.TRANSACTION_NONE);
         Assert.assertEquals(Connection.TRANSACTION_NONE, conn.getTransactionIsolation());
-
         conn.setTransactionIsolation(Connection.TRANSACTION_READ_UNCOMMITTED);
     }
 
@@ -238,7 +238,7 @@ public class TSDBConnectionTest {
         int status = rs.getInt("server_status()");
         Assert.assertEquals(1, status);
 
-        conn.prepareStatement("select server_status", ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY, ResultSet.HOLD_CURSORS_OVER_COMMIT);
+        conn.prepareStatement("select server_status", ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY, ResultSet.HOLD_CURSORS_OVER_COMMIT);
     }
 
     @Test(expected = SQLFeatureNotSupportedException.class)