diff --git a/.github/workflows/maven-publish.yml b/.github/workflows/maven-publish.yml
index 590d40c..0330e03 100644
--- a/.github/workflows/maven-publish.yml
+++ b/.github/workflows/maven-publish.yml
@@ -29,8 +29,8 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
-          asset_path: target/sqllogictest-jdbc-runner-1.0.5-jar-with-dependencies.jar
-          asset_name: sqllogictest-jdbc-runner-1.0.5-jar-with-dependencies.jar
+          asset_path: target/sqllogictest-jdbc-runner-1.0.6-jar-with-dependencies.jar
+          asset_name: sqllogictest-jdbc-runner-1.0.6-jar-with-dependencies.jar
           asset_content_type: application/java-archive
       - name: Publish release
         uses: StuYarrow/publish-release@v1.1.2
diff --git a/pom.xml b/pom.xml
index d274748..638ef95 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
   <groupId>com.risingwave.sqllogictest</groupId>
   <artifactId>sqllogictest-jdbc-runner</artifactId>
-  <version>1.0.5</version>
+  <version>1.0.6</version>
 
   <name>sqllogictest-jdbc-runner</name>
   <url>https://github.com/risinglightdb/sqllogictest-rs</url>
diff --git a/src/main/java/com/risingwave/sqllogictest/App.java b/src/main/java/com/risingwave/sqllogictest/App.java
index 996ee77..e98d089 100644
--- a/src/main/java/com/risingwave/sqllogictest/App.java
+++ b/src/main/java/com/risingwave/sqllogictest/App.java
@@ -6,41 +6,42 @@
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
+import java.util.ArrayList;
 import java.util.Properties;
 
 import com.google.gson.JsonObject;
 import com.google.gson.JsonStreamParser;
+import com.google.gson.Gson;
 
 public class App
 {
-    private static String handleOne(Statement stmt, String sql) throws SQLException {
-        var builder = new StringBuilder();
+    private static ArrayList<ArrayList<String>> handleOne(Statement stmt, String sql) throws SQLException {
+        var result = new ArrayList<ArrayList<String>>();
         if (stmt.execute(sql)) {
             try (ResultSet rs = stmt.getResultSet()) {
                 var colCnt = rs.getMetaData().getColumnCount();
                 while (rs.next()) {
+                    var arr = new ArrayList<String>();
                     for (var i = 1; i <= colCnt; i++) {
-                        if (i != 1) {
-                            builder.append(' ');
-                        }
                         var v = rs.getString(i);
                         if (v == null) {
-                            builder.append("NULL");
+                            arr.add("NULL");
                         } else if (v.isEmpty()) {
-                            builder.append("(empty)");
+                            arr.add("(empty)");
                         } else {
-                            builder.append(v);
+                            arr.add(v);
                         }
                     }
-                    builder.append('\n');
+                    result.add(arr);
                 }
             }
         }
-        return builder.toString();
+        return result;
     }
 
     private static void mainLoop(Connection conn) throws Exception {
         var parser = new JsonStreamParser(new InputStreamReader(System.in));
+        var gson = new Gson();
         try (var stmt = conn.createStatement()) {
             while (parser.hasNext()) {
                 var ele = parser.next();
@@ -48,13 +49,13 @@ private static void mainLoop(Connection conn) throws Exception {
                 try {
                     var result = handleOne(stmt, sql);
                     var resultJson = new JsonObject();
-                    resultJson.addProperty("result", result);
-                    System.out.println(resultJson.toString());
+                    resultJson.add("result", gson.toJsonTree(result));
+                    System.out.println(resultJson);
                 } catch (SQLException e) {
                     e.printStackTrace();
                     var resultJson = new JsonObject();
                     resultJson.addProperty("err", e.getMessage());
-                    System.out.println(resultJson.toString());
+                    System.out.println(resultJson);
                 }
             }
         }
@@ -62,7 +63,7 @@ private static void mainLoop(Connection conn) throws Exception {
 
     public static void main(String[] args)
     {
-        var url = args[0];;
+        var url = args[0];
         var props = new Properties();
         if (args.length > 1) {
             props.setProperty("user", args[1]);