change

src/connector/jdbc/src/test/java/TestTSDBDatabaseMetaData.java

-import com.taosdata.jdbc.TSDBDriver;
-
-import java.sql.*;
-import java.util.Properties;
-
-public class TestTSDBDatabaseMetaData {
-
-    public static void main(String[] args) throws SQLException {
-        Connection connection = null;
-        DatabaseMetaData dbMetaData;
-        ResultSet resSet;
-        try {
-            Class.forName("com.taosdata.jdbc.TSDBDriver");
-            Properties properties = new Properties();
-            properties.setProperty(TSDBDriver.PROPERTY_KEY_HOST, "localhost");
-            connection = DriverManager.getConnection("jdbc:TAOS://localhost:0/", properties);
-            dbMetaData = connection.getMetaData();
-            resSet = dbMetaData.getCatalogs();
-            while(resSet.next()) {
-                for (int i = 1; i <= resSet.getMetaData().getColumnCount(); i++) {
-                    System.out.printf("dbMetaData.getCatalogs(%d) = %s\n", i, resSet.getString(i));
-                }
-            }
-            resSet.close();
-
-        } catch (Exception e) {
-            e.printStackTrace();
-            if (null != connection) {
-                connection.close();
-            }
-        }
-    }
-}

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

@@ -657,7 +657,14 @@ public class TSDBDatabaseMetaDataTest {
 
     @Test
     public void getCatalogs() throws SQLException {
-        Assert.assertNotNull(metaData.getCatalogs());
+        ResultSet catalogs = metaData.getCatalogs();
+        ResultSetMetaData meta = catalogs.getMetaData();
+        while (catalogs.next()) {
+            for (int i = 1; i <= meta.getColumnCount(); i++) {
+                System.out.print(meta.getColumnLabel(i) + ": " + catalogs.getString(i));
+            }
+            System.out.println();
+        }
     }
 
     @Test