diff --git a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/TSDBJNIConnectorTest.java b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/TSDBJNIConnectorTest.java
index cc0f7c6f087fba8d4c80909ab0be083639f9dcfa..4956e91496925656fbea007e76c9e218b42f4cb6 100644
--- a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/TSDBJNIConnectorTest.java
+++ b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/TSDBJNIConnectorTest.java
@@ -44,9 +44,10 @@ public class TSDBJNIConnectorTest {
             }
             rowData = new TSDBResultSetRowData(columnSize);
             // iterate resultSet
-            while (next(connector, pSql)) {
-                System.out.println(rowData.getColSize());
-                rowData.getData().stream().forEach(System.out::println);
+            for (int i = 0; next(connector, pSql); i++) {
+                System.out.println("col[" + i + "] size: " + rowData.getColSize());
+                rowData.getData().stream().forEach(col -> System.out.print(col + "\t"));
+                System.out.println();
             }
             // close resultSet
             code = connector.freeResultSet(pSql);