Fix/td 4148 (#6122)

* [TD-4148]<feature>: JDBC-Restful Compatible version before 2.0.18.0

* [TD-4174]<test>: add test case for TD-4174

* change

* change

* change

* change

* change

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

@@ -30,6 +30,7 @@ public abstract class TSDBConstants {
     public static final int JNI_FETCH_END = -6;
     public static final int JNI_OUT_OF_MEMORY = -7;
     // TSDB Data Types
+    public static final int TSDB_DATA_TYPE_NULL = 0;
     public static final int TSDB_DATA_TYPE_BOOL = 1;
     public static final int TSDB_DATA_TYPE_TINYINT = 2;
     public static final int TSDB_DATA_TYPE_SMALLINT = 3;

src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulResultSet.java

@@ -6,11 +6,13 @@ import com.google.common.primitives.Ints;
 import com.google.common.primitives.Longs;
 import com.google.common.primitives.Shorts;
 import com.taosdata.jdbc.*;
+import com.taosdata.jdbc.utils.Utils;
 
 import java.math.BigDecimal;
 import java.sql.*;
 import java.time.Instant;
 import java.time.ZoneOffset;
+import java.time.format.DateTimeParseException;
 import java.util.ArrayList;
 import java.util.Calendar;
 
@@ -18,14 +20,13 @@ public class RestfulResultSet extends AbstractResultSet implements ResultSet {
     private volatile boolean isClosed;
     private int pos = -1;
 
-
     private final String database;
     private final Statement statement;
     // data
-    private final ArrayList<ArrayList<Object>> resultSet;
+    private final ArrayList<ArrayList<Object>> resultSet = new ArrayList<>();
     // meta
-    private ArrayList<String> columnNames;
-    private ArrayList<Field> columns;
+    private ArrayList<String> columnNames = new ArrayList<>();
+    private ArrayList<Field> columns = new ArrayList<>();
     private RestfulResultSetMetaData metaData;
 
     /**
@@ -37,10 +38,46 @@ public class RestfulResultSet extends AbstractResultSet implements ResultSet {
         this.database = database;
         this.statement = statement;
 
-        // column metadata
+        // get column metadata
         JSONArray columnMeta = resultJson.getJSONArray("column_meta");
-        columnNames = new ArrayList<>();
-        columns = new ArrayList<>();
+        // get row data
+        JSONArray data = resultJson.getJSONArray("data");
+        if (data == null || data.isEmpty()) {
+            columnNames.clear();
+            columns.clear();
+            this.resultSet.clear();
+            return;
+        }
+        // get head
+        JSONArray head = resultJson.getJSONArray("head");
+        // get rows
+        Integer rows = resultJson.getInteger("rows");
+        // parse column_meta
+        if (columnMeta != null) {
+            parseColumnMeta_new(columnMeta);
+        } else {
+            parseColumnMeta_old(head, data, rows);
+        }
+        this.metaData = new RestfulResultSetMetaData(this.database, columns, this);
+        // parse row data
+        resultSet.clear();
+        for (int rowIndex = 0; rowIndex < data.size(); rowIndex++) {
+            ArrayList row = new ArrayList();
+            JSONArray jsonRow = data.getJSONArray(rowIndex);
+            for (int colIndex = 0; colIndex < this.metaData.getColumnCount(); colIndex++) {
+                row.add(parseColumnData(jsonRow, colIndex, columns.get(colIndex).taos_type));
+            }
+            resultSet.add(row);
+        }
+    }
+
+    /***
+     * use this method after TDengine-2.0.18.0 to parse column meta, restful add column_meta in resultSet
+     * @Param columnMeta
+     */
+    private void parseColumnMeta_new(JSONArray columnMeta) throws SQLException {
+        columnNames.clear();
+        columns.clear();
         for (int colIndex = 0; colIndex < columnMeta.size(); colIndex++) {
             JSONArray col = columnMeta.getJSONArray(colIndex);
             String col_name = col.getString(0);
@@ -50,23 +87,55 @@ public class RestfulResultSet extends AbstractResultSet implements ResultSet {
             columnNames.add(col_name);
             columns.add(new Field(col_name, col_type, col_length, "", taos_type));
         }
-        this.metaData = new RestfulResultSetMetaData(this.database, columns, this);
+    }
 
-        // row data
-        JSONArray data = resultJson.getJSONArray("data");
-        resultSet = new ArrayList<>();
-        for (int rowIndex = 0; rowIndex < data.size(); rowIndex++) {
-            ArrayList row = new ArrayList();
-            JSONArray jsonRow = data.getJSONArray(rowIndex);
-            for (int colIndex = 0; colIndex < jsonRow.size(); colIndex++) {
-                row.add(parseColumnData(jsonRow, colIndex, columns.get(colIndex).taos_type));
+    /**
+     * use this method before TDengine-2.0.18.0 to parse column meta
+     */
+    private void parseColumnMeta_old(JSONArray head, JSONArray data, int rows) {
+        columnNames.clear();
+        columns.clear();
+        for (int colIndex = 0; colIndex < head.size(); colIndex++) {
+            String col_name = head.getString(colIndex);
+            columnNames.add(col_name);
+
+            int col_type = Types.NULL;
+            int col_length = 0;
+            int taos_type = TSDBConstants.TSDB_DATA_TYPE_NULL;
+
+            JSONArray row0Json = data.getJSONArray(0);
+            if (colIndex < row0Json.size()) {
+                Object value = row0Json.get(colIndex);
+                if (value instanceof Boolean) {
+                    col_type = Types.BOOLEAN;
+                    col_length = 1;
+                    taos_type = TSDBConstants.TSDB_DATA_TYPE_BOOL;
                 }
-            resultSet.add(row);
+                if (value instanceof Byte || value instanceof Short || value instanceof Integer || value instanceof Long) {
+                    col_type = Types.BIGINT;
+                    col_length = 8;
+                    taos_type = TSDBConstants.TSDB_DATA_TYPE_BIGINT;
+                }
+                if (value instanceof Float || value instanceof Double || value instanceof BigDecimal) {
+                    col_type = Types.DOUBLE;
+                    col_length = 8;
+                    taos_type = TSDBConstants.TSDB_DATA_TYPE_DOUBLE;
+                }
+                if (value instanceof String) {
+                    col_type = Types.NCHAR;
+                    col_length = ((String) value).length();
+                    taos_type = TSDBConstants.TSDB_DATA_TYPE_NCHAR;
+                }
+            }
+            columns.add(new Field(col_name, col_type, col_length, "", taos_type));
         }
     }
 
+
     private Object parseColumnData(JSONArray row, int colIndex, int taosType) throws SQLException {
         switch (taosType) {
+            case TSDBConstants.TSDB_DATA_TYPE_NULL:
+                return null;
             case TSDBConstants.TSDB_DATA_TYPE_BOOL:
                 return row.getBoolean(colIndex);
             case TSDBConstants.TSDB_DATA_TYPE_TINYINT:
@@ -290,8 +359,10 @@ public class RestfulResultSet extends AbstractResultSet implements ResultSet {
             return 0;
         }
         wasNull = false;
-        if (value instanceof Float || value instanceof Double)
+        if (value instanceof Float)
             return (float) value;
+        if (value instanceof Double)
+            return new Float((Double) value);
         return Float.parseFloat(value.toString());
     }
 
@@ -329,6 +400,9 @@ public class RestfulResultSet extends AbstractResultSet implements ResultSet {
             return Shorts.toByteArray((short) value);
         if (value instanceof Byte)
             return new byte[]{(byte) value};
+        if (value instanceof Timestamp) {
+            return Utils.formatTimestamp((Timestamp) value).getBytes();
+        }
 
         return value.toString().getBytes();
     }
@@ -342,7 +416,9 @@ public class RestfulResultSet extends AbstractResultSet implements ResultSet {
             return null;
         if (value instanceof Timestamp)
             return new Date(((Timestamp) value).getTime());
-        return Date.valueOf(value.toString());
+        Date date = null;
+        date = Utils.parseDate(value.toString());
+        return date;
     }
 
     @Override
@@ -354,7 +430,13 @@ public class RestfulResultSet extends AbstractResultSet implements ResultSet {
             return null;
         if (value instanceof Timestamp)
             return new Time(((Timestamp) value).getTime());
-        return Time.valueOf(value.toString());
+        Time time = null;
+        try {
+            time = Utils.parseTime(value.toString());
+        } catch (DateTimeParseException e) {
+            time = null;
+        }
+        return time;
     }
 
     @Override
@@ -366,14 +448,20 @@ public class RestfulResultSet extends AbstractResultSet implements ResultSet {
             return null;
         if (value instanceof Timestamp)
             return (Timestamp) value;
-//        if (value instanceof Long) {
-//            if (1_0000_0000_0000_0L > (long) value)
-//                return Timestamp.from(Instant.ofEpochMilli((long) value));
-//            long epochSec = (long) value / 1000_000L;
-//            long nanoAdjustment = (long) ((long) value % 1000_000L * 1000);
-//            return Timestamp.from(Instant.ofEpochSecond(epochSec, nanoAdjustment));
-//        }
-        return Timestamp.valueOf(value.toString());
+        if (value instanceof Long) {
+            if (1_0000_0000_0000_0L > (long) value)
+                return Timestamp.from(Instant.ofEpochMilli((long) value));
+            long epochSec = (long) value / 1000_000L;
+            long nanoAdjustment = (long) value % 1000_000L * 1000;
+            return Timestamp.from(Instant.ofEpochSecond(epochSec, nanoAdjustment));
+        }
+        Timestamp ret;
+        try {
+            ret = Utils.parseTimestamp(value.toString());
+        } catch (Exception e) {
+            ret = null;
+        }
+        return ret;
     }
 
     @Override
@@ -415,7 +503,13 @@ public class RestfulResultSet extends AbstractResultSet implements ResultSet {
             return new BigDecimal(Double.valueOf(value.toString()));
         if (value instanceof Timestamp)
             return new BigDecimal(((Timestamp) value).getTime());
-        return new BigDecimal(value.toString());
+        BigDecimal ret;
+        try {
+            ret = new BigDecimal(value.toString());
+        } catch (Exception e) {
+            ret = null;
+        }
+        return ret;
     }
 
     @Override

src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/UtcTimestampUtil.java

-package com.taosdata.jdbc.utils;
-
-import java.time.format.DateTimeFormatter;
-import java.time.format.DateTimeFormatterBuilder;
-
-public class UtcTimestampUtil {
-    public static final DateTimeFormatter formatter = new DateTimeFormatterBuilder()
-            .appendPattern("yyyy-MM-ddTHH:mm:ss.SSS+")
-//            .appendFraction(ChronoField.NANO_OF_SECOND, 0, 9, true)
-            .toFormatter();
-
-}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/Utils.java

@@ -5,7 +5,15 @@ import com.google.common.collect.RangeSet;
 import com.google.common.collect.TreeRangeSet;
 
 import java.nio.charset.Charset;
+import java.sql.Date;
+import java.sql.Time;
 import java.sql.Timestamp;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
+import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeFormatterBuilder;
+import java.time.format.DateTimeParseException;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.regex.Matcher;
@@ -17,6 +25,41 @@ public class Utils {
 
     private static Pattern ptn = Pattern.compile(".*?'");
 
+    private static final DateTimeFormatter formatter = new DateTimeFormatterBuilder()
+            .appendPattern("yyyy-MM-dd HH:mm:ss.SSS").toFormatter();
+    private static final DateTimeFormatter formatter2 = new DateTimeFormatterBuilder()
+            .appendPattern("yyyy-MM-dd HH:mm:ss.SSSSSS").toFormatter();
+
+    public static Time parseTime(String timestampStr) throws DateTimeParseException {
+        LocalTime time;
+        try {
+            time = LocalTime.parse(timestampStr, formatter);
+        } catch (DateTimeParseException e) {
+            time = LocalTime.parse(timestampStr, formatter2);
+        }
+        return Time.valueOf(time);
+    }
+
+    public static Date parseDate(String timestampStr) throws DateTimeParseException {
+        LocalDate date;
+        try {
+            date = LocalDate.parse(timestampStr, formatter);
+        } catch (DateTimeParseException e) {
+            date = LocalDate.parse(timestampStr, formatter2);
+        }
+        return Date.valueOf(date);
+    }
+
+    public static Timestamp parseTimestamp(String timeStampStr) {
+        LocalDateTime dateTime;
+        try {
+            dateTime = LocalDateTime.parse(timeStampStr, formatter);
+        } catch (DateTimeParseException e) {
+            dateTime = LocalDateTime.parse(timeStampStr, formatter2);
+        }
+        return Timestamp.valueOf(dateTime);
+    }
+
     public static String escapeSingleQuota(String origin) {
         Matcher m = ptn.matcher(origin);
         StringBuffer sb = new StringBuffer();
@@ -132,4 +175,13 @@ public class Utils {
         }).collect(Collectors.joining());
     }
 
+
+    public static String formatTimestamp(Timestamp timestamp) {
+        int nanos = timestamp.getNanos();
+        if (nanos % 1000000l != 0)
+            return timestamp.toLocalDateTime().format(formatter2);
+        return timestamp.toLocalDateTime().format(formatter);
+    }
+
+
 }

src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/InsertSpecialCharacterRestfulTest.java

@@ -7,7 +7,6 @@ import java.sql.*;
 public class InsertSpecialCharacterRestfulTest {
 
     private static final String host = "127.0.0.1";
-    //    private static final String host = "master";
     private static Connection conn;
     private static String dbName = "spec_char_test";
     private static String tbname1 = "test";

src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/TD4174Test.java

+package com.taosdata.jdbc.cases;
+
+import com.alibaba.fastjson.JSONObject;
+import com.taosdata.jdbc.TSDBDriver;
+import org.junit.*;
+
+import java.sql.*;
+import java.util.Properties;
+
+public class TD4174Test {
+    private Connection conn;
+    private static final String host = "127.0.0.1";
+
+    @Test
+    public void test() {
+        long ts = System.currentTimeMillis();
+        try (PreparedStatement pstmt = conn.prepareStatement("insert into weather values(" + ts + ", ?)")) {
+            JSONObject value = new JSONObject();
+            value.put("name", "John Smith");
+            value.put("age", 20);
+            Assert.assertEquals("{\"name\":\"John Smith\",\"age\":20}",value.toJSONString());
+            pstmt.setString(1, value.toJSONString());
+
+            int ret = pstmt.executeUpdate();
+            Assert.assertEquals(1, ret);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static void main(String[] args) {
+        JSONObject value = new JSONObject();
+        value.put("name", "John Smith");
+        value.put("age", 20);
+        System.out.println(value.toJSONString());
+    }
+
+    @Before
+    public void before() throws SQLException {
+        String url = "jdbc:TAOS://" + host + ":6030/?user=root&password=taosdata";
+        Properties properties = new Properties();
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
+
+        conn = DriverManager.getConnection(url, properties);
+        try (Statement stmt = conn.createStatement()) {
+            stmt.execute("drop database if exists td4174");
+            stmt.execute("create database if not exists td4174");
+            stmt.execute("use td4174");
+            stmt.execute("create table weather(ts timestamp, text binary(64))");
+        }
+    }
+
+    @After
+    public void after() throws SQLException {
+        if (conn != null)
+            conn.close();
+
+    }
+
+}

src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/TwoTypeTimestampPercisionInRestfulTest.java

@@ -13,6 +13,7 @@ import java.util.Properties;
 public class TwoTypeTimestampPercisionInRestfulTest {
 
     private static final String host = "127.0.0.1";
+
     private static final String ms_timestamp_db = "ms_precision_test";
     private static final String us_timestamp_db = "us_precision_test";
     private static final long timestamp1 = System.currentTimeMillis();
@@ -94,7 +95,8 @@ public class TwoTypeTimestampPercisionInRestfulTest {
         try (Statement stmt = conn3.createStatement()) {
             ResultSet rs = stmt.executeQuery("select last_row(ts) from " + ms_timestamp_db + ".weather");
             rs.next();
-            long ts = rs.getTimestamp(1).getTime();
+            Timestamp actual = rs.getTimestamp(1);
+            long ts = actual == null ? 0 : actual.getTime();
             Assert.assertEquals(timestamp1, ts);
             ts = rs.getLong(1);
             Assert.assertEquals(timestamp1, ts);
@@ -110,7 +112,7 @@ public class TwoTypeTimestampPercisionInRestfulTest {
             rs.next();
 
             Timestamp timestamp = rs.getTimestamp(1);
-            long ts = timestamp.getTime();
+            long ts = timestamp == null ? 0 : timestamp.getTime();
             Assert.assertEquals(timestamp1, ts);
             int nanos = timestamp.getNanos();
             Assert.assertEquals(timestamp2 % 1000_000l * 1000, nanos);

src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/UnsignedNumberJniTest.java

@@ -9,19 +9,19 @@ import java.util.Properties;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
 public class UnsignedNumberJniTest {
+
     private static final String host = "127.0.0.1";
     private static Connection conn;
+    private static long ts;
 
     @Test
     public void testCase001() {
         try (Statement stmt = conn.createStatement()) {
             ResultSet rs = stmt.executeQuery("select * from us_table");
             ResultSetMetaData meta = rs.getMetaData();
+            assertResultSetMetaData(meta);
             while (rs.next()) {
-                for (int i = 1; i <= meta.getColumnCount(); i++) {
-                    System.out.print(meta.getColumnLabel(i) + ": " + rs.getString(i) + "\t");
-                }
-                System.out.println();
+                Assert.assertEquals(ts, rs.getTimestamp(1).getTime());
                 Assert.assertEquals("127", rs.getString(2));
                 Assert.assertEquals("32767", rs.getString(3));
                 Assert.assertEquals("2147483647", rs.getString(4));
@@ -37,13 +37,10 @@ public class UnsignedNumberJniTest {
         try (Statement stmt = conn.createStatement()) {
             ResultSet rs = stmt.executeQuery("select * from us_table");
             ResultSetMetaData meta = rs.getMetaData();
+            assertResultSetMetaData(meta);
+
             while (rs.next()) {
-                System.out.print(meta.getColumnLabel(1) + ": " + rs.getTimestamp(1) + "\t");
-                System.out.print(meta.getColumnLabel(2) + ": " + rs.getByte(2) + "\t");
-                System.out.print(meta.getColumnLabel(3) + ": " + rs.getShort(3) + "\t");
-                System.out.print(meta.getColumnLabel(4) + ": " + rs.getInt(4) + "\t");
-                System.out.print(meta.getColumnLabel(5) + ": " + rs.getLong(5) + "\t");
-                System.out.println();
+                Assert.assertEquals(ts, rs.getTimestamp(1).getTime());
                 Assert.assertEquals(127, rs.getByte(2));
                 Assert.assertEquals(32767, rs.getShort(3));
                 Assert.assertEquals(2147483647, rs.getInt(4));
@@ -61,16 +58,14 @@ public class UnsignedNumberJniTest {
             stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(" + now + ", 127, 32767,2147483647, 18446744073709551614)");
             ResultSet rs = stmt.executeQuery("select * from us_table where ts = " + now);
             ResultSetMetaData meta = rs.getMetaData();
+            assertResultSetMetaData(meta);
             while (rs.next()) {
-                System.out.print(meta.getColumnLabel(1) + ": " + rs.getTimestamp(1) + "\t");
-                System.out.print(meta.getColumnLabel(2) + ": " + rs.getByte(2) + "\t");
-                System.out.print(meta.getColumnLabel(3) + ": " + rs.getShort(3) + "\t");
-                System.out.print(meta.getColumnLabel(4) + ": " + rs.getInt(4) + "\t");
-                System.out.print(meta.getColumnLabel(5) + ": " + rs.getLong(5) + "\t");
-                System.out.println();
+                Assert.assertEquals(now, rs.getTimestamp(1).getTime());
                 Assert.assertEquals(127, rs.getByte(2));
                 Assert.assertEquals(32767, rs.getShort(3));
                 Assert.assertEquals(2147483647, rs.getInt(4));
+                Assert.assertEquals("18446744073709551614", rs.getString(5));
+                rs.getLong(5);
             }
         }
     }
@@ -82,15 +77,15 @@ public class UnsignedNumberJniTest {
             stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(" + now + ", 127, 32767,4294967294, 18446744073709551614)");
             ResultSet rs = stmt.executeQuery("select * from us_table where ts = " + now);
             ResultSetMetaData meta = rs.getMetaData();
+            assertResultSetMetaData(meta);
+
             while (rs.next()) {
-                System.out.print(meta.getColumnLabel(1) + ": " + rs.getTimestamp(1) + "\t");
-                System.out.print(meta.getColumnLabel(2) + ": " + rs.getByte(2) + "\t");
-                System.out.print(meta.getColumnLabel(3) + ": " + rs.getShort(3) + "\t");
-                System.out.print(meta.getColumnLabel(4) + ": " + rs.getInt(4) + "\t");
-                System.out.print(meta.getColumnLabel(5) + ": " + rs.getLong(5) + "\t");
-                System.out.println();
+                Assert.assertEquals(now, rs.getTimestamp(1).getTime());
                 Assert.assertEquals(127, rs.getByte(2));
                 Assert.assertEquals(32767, rs.getShort(3));
+                Assert.assertEquals("4294967294", rs.getString(4));
+                Assert.assertEquals("18446744073709551614", rs.getString(5));
+                rs.getInt(4);
             }
         }
     }
@@ -102,15 +97,15 @@ public class UnsignedNumberJniTest {
             stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(" + now + ", 127, 65534,4294967294, 18446744073709551614)");
             ResultSet rs = stmt.executeQuery("select * from us_table where ts = " + now);
             ResultSetMetaData meta = rs.getMetaData();
-            while (rs.next()) {
-                System.out.print(meta.getColumnLabel(1) + ": " + rs.getTimestamp(1) + "\t");
-                System.out.print(meta.getColumnLabel(2) + ": " + rs.getByte(2) + "\t");
-                System.out.print(meta.getColumnLabel(3) + ": " + rs.getShort(3) + "\t");
-                System.out.print(meta.getColumnLabel(4) + ": " + rs.getInt(4) + "\t");
-                System.out.print(meta.getColumnLabel(5) + ": " + rs.getLong(5) + "\t");
-                System.out.println();
+            assertResultSetMetaData(meta);
 
+            while (rs.next()) {
+                Assert.assertEquals(now, rs.getTimestamp(1).getTime());
                 Assert.assertEquals(127, rs.getByte(2));
+                Assert.assertEquals("65534", rs.getString(3));
+                Assert.assertEquals("4294967294", rs.getString(4));
+                Assert.assertEquals("18446744073709551614", rs.getString(5));
+                rs.getShort(3);
             }
         }
     }
@@ -122,37 +117,27 @@ public class UnsignedNumberJniTest {
             stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(" + now + ", 254, 65534,4294967294, 18446744073709551614)");
             ResultSet rs = stmt.executeQuery("select * from us_table where ts = " + now);
             ResultSetMetaData meta = rs.getMetaData();
-            while (rs.next()) {
-                System.out.print(meta.getColumnLabel(1) + ": " + rs.getTimestamp(1) + "\t");
-                System.out.print(meta.getColumnLabel(2) + ": " + rs.getByte(2) + "\t");
-                System.out.print(meta.getColumnLabel(3) + ": " + rs.getShort(3) + "\t");
-                System.out.print(meta.getColumnLabel(4) + ": " + rs.getInt(4) + "\t");
-                System.out.print(meta.getColumnLabel(5) + ": " + rs.getLong(5) + "\t");
-                System.out.println();
-            }
-        }
-    }
+            assertResultSetMetaData(meta);
 
-    @Test
-    public void testCase007() throws SQLException {
-        try (Statement stmt = conn.createStatement()) {
-            long now = System.currentTimeMillis();
-            stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(" + now + ", 254, 65534,4294967294, 18446744073709551614)");
-            ResultSet rs = stmt.executeQuery("select * from us_table where ts = " + now);
-            ResultSetMetaData meta = rs.getMetaData();
             while (rs.next()) {
-                for (int i = 1; i <= meta.getColumnCount(); i++) {
-                    System.out.print(meta.getColumnLabel(i) + ": " + rs.getString(i) + "\t");
-                }
-                System.out.println();
+                Assert.assertEquals(now, rs.getTimestamp(1).getTime());
                 Assert.assertEquals("254", rs.getString(2));
                 Assert.assertEquals("65534", rs.getString(3));
                 Assert.assertEquals("4294967294", rs.getString(4));
                 Assert.assertEquals("18446744073709551614", rs.getString(5));
+                rs.getByte(2);
             }
         }
     }
 
+    private void assertResultSetMetaData(ResultSetMetaData meta) throws SQLException {
+        Assert.assertEquals(5, meta.getColumnCount());
+        Assert.assertEquals("ts", meta.getColumnLabel(1));
+        Assert.assertEquals("f1", meta.getColumnLabel(2));
+        Assert.assertEquals("f2", meta.getColumnLabel(3));
+        Assert.assertEquals("f3", meta.getColumnLabel(4));
+        Assert.assertEquals("f4", meta.getColumnLabel(5));
+    }
 
     @BeforeClass
     public static void beforeClass() {
@@ -160,20 +145,19 @@ public class UnsignedNumberJniTest {
         properties.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
         properties.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
         properties.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
+        ts = System.currentTimeMillis();
 
         try {
-            Class.forName("com.taosdata.jdbc.TSDBDriver");
             final String url = "jdbc:TAOS://" + host + ":6030/?user=root&password=taosdata";
             conn = DriverManager.getConnection(url, properties);
-
             Statement stmt = conn.createStatement();
             stmt.execute("drop database if exists unsign_jni");
             stmt.execute("create database if not exists unsign_jni");
             stmt.execute("use unsign_jni");
             stmt.execute("create table us_table(ts timestamp, f1 tinyint unsigned, f2 smallint unsigned, f3 int unsigned, f4 bigint unsigned)");
-            stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(now, 127, 32767,2147483647, 9223372036854775807)");
+            stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(" + ts + ", 127, 32767,2147483647, 9223372036854775807)");
             stmt.close();
-        } catch (ClassNotFoundException | SQLException e) {
+        } catch (SQLException e) {
             e.printStackTrace();
         }
     }

src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/UnsignedNumberRestfulTest.java

@@ -13,17 +13,20 @@ public class UnsignedNumberRestfulTest {
 
     private static final String host = "127.0.0.1";
     private static Connection conn;
+    private static long ts;
 
     @Test
     public void testCase001() {
         try (Statement stmt = conn.createStatement()) {
             ResultSet rs = stmt.executeQuery("select * from us_table");
             ResultSetMetaData meta = rs.getMetaData();
+            assertResultSetMetaData(meta);
             while (rs.next()) {
-                for (int i = 1; i <= meta.getColumnCount(); i++) {
-                    System.out.print(meta.getColumnLabel(i) + ": " + rs.getString(i) + "\t");
-                }
-                System.out.println();
+                Assert.assertEquals(ts, rs.getTimestamp(1).getTime());
+                Assert.assertEquals("127", rs.getString(2));
+                Assert.assertEquals("32767", rs.getString(3));
+                Assert.assertEquals("2147483647", rs.getString(4));
+                Assert.assertEquals("9223372036854775807", rs.getString(5));
             }
         } catch (SQLException e) {
             e.printStackTrace();
@@ -35,13 +38,14 @@ public class UnsignedNumberRestfulTest {
         try (Statement stmt = conn.createStatement()) {
             ResultSet rs = stmt.executeQuery("select * from us_table");
             ResultSetMetaData meta = rs.getMetaData();
+            assertResultSetMetaData(meta);
+
             while (rs.next()) {
-                System.out.print(meta.getColumnLabel(1) + ": " + rs.getTimestamp(1) + "\t");
-                System.out.print(meta.getColumnLabel(2) + ": " + rs.getByte(2) + "\t");
-                System.out.print(meta.getColumnLabel(3) + ": " + rs.getShort(3) + "\t");
-                System.out.print(meta.getColumnLabel(4) + ": " + rs.getInt(4) + "\t");
-                System.out.print(meta.getColumnLabel(5) + ": " + rs.getLong(5) + "\t");
-                System.out.println();
+                Assert.assertEquals(ts, rs.getTimestamp(1).getTime());
+                Assert.assertEquals(127, rs.getByte(2));
+                Assert.assertEquals(32767, rs.getShort(3));
+                Assert.assertEquals(2147483647, rs.getInt(4));
+                Assert.assertEquals(9223372036854775807l, rs.getLong(5));
             }
         } catch (SQLException e) {
             e.printStackTrace();
@@ -55,13 +59,14 @@ public class UnsignedNumberRestfulTest {
             stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(" + now + ", 127, 32767,2147483647, 18446744073709551614)");
             ResultSet rs = stmt.executeQuery("select * from us_table where ts = " + now);
             ResultSetMetaData meta = rs.getMetaData();
+            assertResultSetMetaData(meta);
             while (rs.next()) {
-                System.out.print(meta.getColumnLabel(1) + ": " + rs.getTimestamp(1) + "\t");
-                System.out.print(meta.getColumnLabel(2) + ": " + rs.getByte(2) + "\t");
-                System.out.print(meta.getColumnLabel(3) + ": " + rs.getShort(3) + "\t");
-                System.out.print(meta.getColumnLabel(4) + ": " + rs.getInt(4) + "\t");
-                System.out.print(meta.getColumnLabel(5) + ": " + rs.getLong(5) + "\t");
-                System.out.println();
+                Assert.assertEquals(now, rs.getTimestamp(1).getTime());
+                Assert.assertEquals(127, rs.getByte(2));
+                Assert.assertEquals(32767, rs.getShort(3));
+                Assert.assertEquals(2147483647, rs.getInt(4));
+                Assert.assertEquals("18446744073709551614", rs.getString(5));
+                rs.getLong(5);
             }
         }
     }
@@ -73,13 +78,15 @@ public class UnsignedNumberRestfulTest {
             stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(" + now + ", 127, 32767,4294967294, 18446744073709551614)");
             ResultSet rs = stmt.executeQuery("select * from us_table where ts = " + now);
             ResultSetMetaData meta = rs.getMetaData();
+            assertResultSetMetaData(meta);
+
             while (rs.next()) {
-                System.out.print(meta.getColumnLabel(1) + ": " + rs.getTimestamp(1) + "\t");
-                System.out.print(meta.getColumnLabel(2) + ": " + rs.getByte(2) + "\t");
-                System.out.print(meta.getColumnLabel(3) + ": " + rs.getShort(3) + "\t");
-                System.out.print(meta.getColumnLabel(4) + ": " + rs.getInt(4) + "\t");
-                System.out.print(meta.getColumnLabel(5) + ": " + rs.getLong(5) + "\t");
-                System.out.println();
+                Assert.assertEquals(now, rs.getTimestamp(1).getTime());
+                Assert.assertEquals(127, rs.getByte(2));
+                Assert.assertEquals(32767, rs.getShort(3));
+                Assert.assertEquals("4294967294", rs.getString(4));
+                Assert.assertEquals("18446744073709551614", rs.getString(5));
+                rs.getInt(4);
             }
         }
     }
@@ -91,13 +98,15 @@ public class UnsignedNumberRestfulTest {
             stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(" + now + ", 127, 65534,4294967294, 18446744073709551614)");
             ResultSet rs = stmt.executeQuery("select * from us_table where ts = " + now);
             ResultSetMetaData meta = rs.getMetaData();
+            assertResultSetMetaData(meta);
+
             while (rs.next()) {
-                System.out.print(meta.getColumnLabel(1) + ": " + rs.getTimestamp(1) + "\t");
-                System.out.print(meta.getColumnLabel(2) + ": " + rs.getByte(2) + "\t");
-                System.out.print(meta.getColumnLabel(3) + ": " + rs.getShort(3) + "\t");
-                System.out.print(meta.getColumnLabel(4) + ": " + rs.getInt(4) + "\t");
-                System.out.print(meta.getColumnLabel(5) + ": " + rs.getLong(5) + "\t");
-                System.out.println();
+                Assert.assertEquals(now, rs.getTimestamp(1).getTime());
+                Assert.assertEquals(127, rs.getByte(2));
+                Assert.assertEquals("65534", rs.getString(3));
+                Assert.assertEquals("4294967294", rs.getString(4));
+                Assert.assertEquals("18446744073709551614", rs.getString(5));
+                rs.getShort(3);
             }
         }
     }
@@ -109,35 +118,26 @@ public class UnsignedNumberRestfulTest {
             stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(" + now + ", 254, 65534,4294967294, 18446744073709551614)");
             ResultSet rs = stmt.executeQuery("select * from us_table where ts = " + now);
             ResultSetMetaData meta = rs.getMetaData();
-            while (rs.next()) {
-                System.out.print(meta.getColumnLabel(1) + ": " + rs.getTimestamp(1) + "\t");
-                System.out.print(meta.getColumnLabel(2) + ": " + rs.getByte(2) + "\t");
-                System.out.print(meta.getColumnLabel(3) + ": " + rs.getShort(3) + "\t");
-                System.out.print(meta.getColumnLabel(4) + ": " + rs.getInt(4) + "\t");
-                System.out.print(meta.getColumnLabel(5) + ": " + rs.getLong(5) + "\t");
-                System.out.println();
-            }
-        }
-    }
+            assertResultSetMetaData(meta);
 
-    @Test
-    public void testCase007() throws SQLException {
-        try (Statement stmt = conn.createStatement()) {
-            long now = System.currentTimeMillis();
-            stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(" + now + ", 254, 65534,4294967294, 18446744073709551614)");
-            ResultSet rs = stmt.executeQuery("select * from us_table where ts = " + now);
-            ResultSetMetaData meta = rs.getMetaData();
             while (rs.next()) {
-                for (int i = 1; i <= meta.getColumnCount(); i++) {
-                    System.out.print(meta.getColumnLabel(i) + ": " + rs.getString(i) + "\t");
-                }
-                System.out.println();
+                Assert.assertEquals(now, rs.getTimestamp(1).getTime());
                 Assert.assertEquals("254", rs.getString(2));
                 Assert.assertEquals("65534", rs.getString(3));
                 Assert.assertEquals("4294967294", rs.getString(4));
                 Assert.assertEquals("18446744073709551614", rs.getString(5));
+                rs.getByte(2);
+            }
         }
     }
+
+    private void assertResultSetMetaData(ResultSetMetaData meta) throws SQLException {
+        Assert.assertEquals(5, meta.getColumnCount());
+        Assert.assertEquals("ts", meta.getColumnLabel(1));
+        Assert.assertEquals("f1", meta.getColumnLabel(2));
+        Assert.assertEquals("f2", meta.getColumnLabel(3));
+        Assert.assertEquals("f3", meta.getColumnLabel(4));
+        Assert.assertEquals("f4", meta.getColumnLabel(5));
     }
 
     @BeforeClass
@@ -146,20 +146,19 @@ public class UnsignedNumberRestfulTest {
         properties.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
         properties.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
         properties.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
+        ts = System.currentTimeMillis();
 
         try {
-            Class.forName("com.taosdata.jdbc.rs.RestfulDriver");
             final String url = "jdbc:TAOS-RS://" + host + ":6041/?user=root&password=taosdata";
             conn = DriverManager.getConnection(url, properties);
-
             Statement stmt = conn.createStatement();
             stmt.execute("drop database if exists unsign_restful");
             stmt.execute("create database if not exists unsign_restful");
             stmt.execute("use unsign_restful");
             stmt.execute("create table us_table(ts timestamp, f1 tinyint unsigned, f2 smallint unsigned, f3 int unsigned, f4 bigint unsigned)");
-            stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(now, 127, 32767,2147483647, 9223372036854775807)");
+            stmt.executeUpdate("insert into us_table(ts,f1,f2,f3,f4) values(" + ts + ", 127, 32767,2147483647, 9223372036854775807)");
             stmt.close();
-        } catch (ClassNotFoundException | SQLException e) {
+        } catch (SQLException e) {
             e.printStackTrace();
         }
     }

src/connector/jdbc/src/test/java/com/taosdata/jdbc/rs/RestfulPreparedStatementTest.java

@@ -10,7 +10,6 @@ import java.sql.*;
 
 public class RestfulPreparedStatementTest {
     private static final String host = "127.0.0.1";
-    //    private static final String host = "master";
     private static Connection conn;
     private static final String sql_insert = "insert into t1 values(?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
     private static PreparedStatement pstmt_insert;
@@ -371,7 +370,6 @@ public class RestfulPreparedStatementTest {
         pstmt_insert.setSQLXML(1, null);
     }
 
-
     @BeforeClass
     public static void beforeClass() {
         try {

src/connector/jdbc/src/test/java/com/taosdata/jdbc/rs/RestfulResultSetTest.java

@@ -18,7 +18,6 @@ import java.text.SimpleDateFormat;
 public class RestfulResultSetTest {
 
     private static final String host = "127.0.0.1";
-
     private static Connection conn;
     private static Statement stmt;
     private static ResultSet rs;
@@ -95,7 +94,8 @@ public class RestfulResultSetTest {
     @Test
     public void getBigDecimal() throws SQLException {
         BigDecimal f1 = rs.getBigDecimal("f1");
-        Assert.assertEquals(1609430400000l, f1.longValue());
+        long actual = (f1 == null) ? 0 : f1.longValue();
+        Assert.assertEquals(1609430400000l, actual);
 
         BigDecimal f2 = rs.getBigDecimal("f2");
         Assert.assertEquals(1, f2.intValue());
@@ -119,7 +119,7 @@ public class RestfulResultSetTest {
     @Test
     public void getBytes() throws SQLException {
         byte[] f1 = rs.getBytes("f1");
-        Assert.assertEquals("2021-01-01 00:00:00.0", new String(f1));
+        Assert.assertEquals("2021-01-01 00:00:00.000", new String(f1));
 
         byte[] f2 = rs.getBytes("f2");
         Assert.assertEquals(1, Ints.fromByteArray(f2));