diff --git a/.drone.yml b/.drone.yml
index 4009b563b4cfd7e42ca58f07014245400f7e5f6d..b71b99e4889d0d59b31afc2091a97e8d77400cd7 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -11,7 +11,7 @@ steps:
   image: gcc
   commands:
   - apt-get update
-  - apt-get install -y cmake build-essential git
+  - apt-get install -y cmake build-essential
   - mkdir debug
   - cd debug
   - cmake .. 
@@ -82,7 +82,7 @@ platform:
 
 steps:
 - name: build
-  image: gcc
+  image: arm32v7/ubuntu:bionic
   commands:
   - apt-get update
   - apt-get install -y cmake build-essential
diff --git a/cmake/version.inc b/cmake/version.inc
index 8035b31cc7a9a391becaacbff22d708177536ce2..a560c7f5988b10cee040078e070316302d5584b7 100755
--- a/cmake/version.inc
+++ b/cmake/version.inc
@@ -4,7 +4,7 @@ PROJECT(TDengine)
 IF (DEFINED VERNUMBER)
   SET(TD_VER_NUMBER ${VERNUMBER})
 ELSE ()
-  SET(TD_VER_NUMBER "2.0.20.0")
+  SET(TD_VER_NUMBER "2.0.20.2")
 ENDIF ()
 
 IF (DEFINED VERCOMPATIBLE)
diff --git a/snap/snapcraft.yaml b/snap/snapcraft.yaml
index 31343ed293c2617a56da57e3893a36b5d3289faf..9c7400c6165f88fec22ac1e811c2b204a3e103ba 100644
--- a/snap/snapcraft.yaml
+++ b/snap/snapcraft.yaml
@@ -1,6 +1,6 @@
 name: tdengine
 base: core18
-version: '2.0.20.0'
+version: '2.0.20.2'
 icon: snap/gui/t-dengine.svg
 summary: an open-source big data platform designed and optimized for IoT. 
 description: |
@@ -72,7 +72,7 @@ parts:
       - usr/bin/taosd
       - usr/bin/taos
       - usr/bin/taosdemo
-      - usr/lib/libtaos.so.2.0.20.0
+      - usr/lib/libtaos.so.2.0.20.2
       - usr/lib/libtaos.so.1
       - usr/lib/libtaos.so
 
diff --git a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulPreparedStatement.java b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulPreparedStatement.java
index f846a1162e4a1e6a84bc7b748718dcc852657de9..f58e3f8cd2406e6372900c2f7b2547a450fb7fe9 100644
--- a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulPreparedStatement.java
+++ b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulPreparedStatement.java
@@ -1,26 +1,15 @@
 package com.taosdata.jdbc.rs;
 
-import com.google.common.collect.Range;
-import com.google.common.collect.RangeSet;
-import com.google.common.collect.TreeRangeSet;
 import com.taosdata.jdbc.TSDBError;
 import com.taosdata.jdbc.TSDBErrorNumbers;
-import com.taosdata.jdbc.utils.SqlSyntaxValidator;
 import com.taosdata.jdbc.utils.Utils;
 
 import java.io.InputStream;
 import java.io.Reader;
 import java.math.BigDecimal;
 import java.net.URL;
-import java.nio.charset.Charset;
 import java.sql.*;
 import java.util.Calendar;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-import java.util.stream.Collectors;
-import java.util.stream.IntStream;
 
 public class RestfulPreparedStatement extends RestfulStatement implements PreparedStatement {
 
diff --git a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/Utils.java b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/Utils.java
index a7cb71ad38c649535acb5f5e7c3b97c2d63c809d..0ce4bd3dc1dc991683a217e70995ef861d82cbd7 100644
--- a/src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/Utils.java
+++ b/src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/Utils.java
@@ -67,7 +67,7 @@ public class Utils {
         findPlaceholderPosition(preparedSql, placeholderPositions);
         findClauseRangeSet(preparedSql, clause, clauseRangeSet);
 
-        return transformSql(preparedSql, parameters, placeholderPositions, clauseRangeSet);
+        return transformSql(rawSql, parameters, placeholderPositions, clauseRangeSet);
     }
 
     private static void findClauseRangeSet(String preparedSql, String[] regexArr, RangeSet<Integer> clauseRangeSet) {
@@ -95,14 +95,14 @@ public class Utils {
 
     /***
      *
-     * @param preparedSql
+     * @param rawSql
      * @param paramArr
      * @param placeholderPosition
      * @param clauseRangeSet
      * @return
      */
-    private static String transformSql(String preparedSql, Object[] paramArr, Map<Integer, Integer> placeholderPosition, RangeSet<Integer> clauseRangeSet) {
-        String[] sqlArr = preparedSql.split("\\?");
+    private static String transformSql(String rawSql, Object[] paramArr, Map<Integer, Integer> placeholderPosition, RangeSet<Integer> clauseRangeSet) {
+        String[] sqlArr = rawSql.split("\\?");
         return IntStream.range(0, sqlArr.length).mapToObj(index -> {
             if (index == paramArr.length)
                 return sqlArr[index];
diff --git a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/SubscribeTest.java b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/SubscribeTest.java
index 11c3de305280a48b690ccdacd2df9751f4b718a9..3a223ed981a7f465386319c3a671782c92bf334f 100644
--- a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/SubscribeTest.java
+++ b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/SubscribeTest.java
@@ -12,6 +12,7 @@ import java.util.Properties;
 import java.util.concurrent.TimeUnit;
 
 public class SubscribeTest {
+
     Connection connection;
     Statement statement;
     String dbName = "test";
@@ -19,62 +20,53 @@ public class SubscribeTest {
     String host = "127.0.0.1";
     String topic = "test";
 
-    @Before
-    public void createDatabase() {
-        try {
-            Class.forName("com.taosdata.jdbc.TSDBDriver");
-            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");
-            connection = DriverManager.getConnection("jdbc:TAOS://" + host + ":0/", properties);
-
-            statement = connection.createStatement();
-            statement.execute("drop database if exists " + dbName);
-            statement.execute("create database if not exists " + dbName);
-            statement.execute("create table if not exists " + dbName + "." + tName + " (ts timestamp, k int, v int)");
-            long ts = System.currentTimeMillis();
-            for (int i = 0; i < 2; i++) {
-                ts += i;
-                String sql = "insert into " + dbName + "." + tName + " values (" + ts + ", " + (100 + i) + ", " + i + ")";
-                statement.executeUpdate(sql);
-            }
-
-        } catch (ClassNotFoundException | SQLException e) {
-            return;
-        }
-    }
-
     @Test
     public void subscribe() {
         try {
             String rawSql = "select * from " + dbName + "." + tName + ";";
-            System.out.println(rawSql);
-//            TSDBSubscribe subscribe = ((TSDBConnection) connection).subscribe(topic, rawSql, false);
+            TSDBConnection conn = connection.unwrap(TSDBConnection.class);
+            TSDBSubscribe subscribe = conn.subscribe(topic, rawSql, false);
+
+            int a = 0;
+            while (true) {
+                TimeUnit.MILLISECONDS.sleep(1000);
+                TSDBResultSet resSet = subscribe.consume();
+                while (resSet.next()) {
+                    for (int i = 1; i <= resSet.getMetaData().getColumnCount(); i++) {
+                        System.out.printf(i + ": " + resSet.getString(i) + "\t");
+                    }
+                    System.out.println("\n======" + a + "==========");
+                }
+                a++;
+                if (a >= 2) {
+                    break;
+                }
+                resSet.close();
+            }
 
-//            int a = 0;
-//            while (true) {
-//                TimeUnit.MILLISECONDS.sleep(1000);
-//                TSDBResultSet resSet = subscribe.consume();
-//                while (resSet.next()) {
-//                    for (int i = 1; i <= resSet.getMetaData().getColumnCount(); i++) {
-//                        System.out.printf(i + ": " + resSet.getString(i) + "\t");
-//                    }
-//                    System.out.println("\n======" + a + "==========");
-//                }
-//                a++;
-//                if (a >= 2) {
-//                    break;
-//                }
-//                resSet.close();
-//            }
-//
-//            subscribe.close(true);
+            subscribe.close(true);
         } catch (Exception e) {
             e.printStackTrace();
         }
     }
 
+    @Before
+    public void createDatabase() throws SQLException {
+        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");
+        connection = DriverManager.getConnection("jdbc:TAOS://" + host + ":0/", properties);
+
+        statement = connection.createStatement();
+        statement.execute("drop database if exists " + dbName);
+        statement.execute("create database if not exists " + dbName);
+        statement.execute("create table if not exists " + dbName + "." + tName + " (ts timestamp, k int, v int)");
+        long ts = System.currentTimeMillis();
+        statement.executeUpdate("insert into " + dbName + "." + tName + " values (" + ts + ", 100, 1)");
+        statement.executeUpdate("insert into " + dbName + "." + tName + " values (" + (ts + 1) + ", 101, 2)");
+    }
+
     @After
     public void close() {
         try {
@@ -86,6 +78,5 @@ public class SubscribeTest {
         } catch (SQLException e) {
             e.printStackTrace();
         }
-
     }
 }
\ No newline at end of file
diff --git a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/InsertSpecialCharacterJniTest.java b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/InsertSpecialCharacterJniTest.java
index e7d327413612edec118a527a35ed4cb7a7630a94..9014e82a9ece395fd3319d00563b9956691e8e8e 100644
--- a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/InsertSpecialCharacterJniTest.java
+++ b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/InsertSpecialCharacterJniTest.java
@@ -345,6 +345,31 @@ public class InsertSpecialCharacterJniTest {
         }
     }
 
+    @Test
+    public void testCase12() throws SQLException {
+        final long now = System.currentTimeMillis();
+        // insert
+        final String sql = "insert into " + tbname1 + "(ts, f1, f2) values(?, 'HelloTDengine', ?)  ; ";
+        try (PreparedStatement pstmt = conn.prepareStatement(sql)) {
+            pstmt.setTimestamp(1, new Timestamp(now));
+            pstmt.setString(2, special_character_str_4);
+            int ret = pstmt.executeUpdate();
+            Assert.assertEquals(1, ret);
+        }
+        // query
+        final String query = "select * from " + tbname1;
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery(query);
+            rs.next();
+            long timestamp = rs.getTimestamp(1).getTime();
+            Assert.assertEquals(now, timestamp);
+            String f1 = new String(rs.getBytes(2));
+            Assert.assertEquals("HelloTDengine", f1);
+            String f2 = rs.getString(3);
+            Assert.assertEquals(special_character_str_4, f2);
+        }
+    }
+
     @Before
     public void before() throws SQLException {
         try (Statement stmt = conn.createStatement()) {
diff --git a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/InsertSpecialCharacterRestfulTest.java b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/InsertSpecialCharacterRestfulTest.java
index 64a0e976846d72631549bd32b2b63558e0466c47..0cbbe76716f7f057f79ad7011e20efa838401e95 100644
--- a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/InsertSpecialCharacterRestfulTest.java
+++ b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/InsertSpecialCharacterRestfulTest.java
@@ -346,6 +346,31 @@ public class InsertSpecialCharacterRestfulTest {
         }
     }
 
+    @Test
+    public void testCase12() throws SQLException {
+        final long now = System.currentTimeMillis();
+        // insert
+        final String sql = "insert into " + tbname1 + "(ts, f1, f2) values(?, 'HelloTDengine', ?)  ; ";
+        try (PreparedStatement pstmt = conn.prepareStatement(sql)) {
+            pstmt.setTimestamp(1, new Timestamp(now));
+            pstmt.setString(2, special_character_str_4);
+            int ret = pstmt.executeUpdate();
+            Assert.assertEquals(1, ret);
+        }
+        // query
+        final String query = "select * from " + tbname1;
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery(query);
+            rs.next();
+            long timestamp = rs.getTimestamp(1).getTime();
+            Assert.assertEquals(now, timestamp);
+            String f1 = new String(rs.getBytes(2));
+            Assert.assertEquals("HelloTDengine", f1);
+            String f2 = rs.getString(3);
+            Assert.assertEquals(special_character_str_4, f2);
+        }
+    }
+
     @Before
     public void before() throws SQLException {
         try (Statement stmt = conn.createStatement()) {
diff --git a/src/kit/taosdemo/taosdemo.c b/src/kit/taosdemo/taosdemo.c
index 12684c63bc39915b243845d0ac175d8e620e066f..37023913c485f7d02274ed56c2ba103d9562c84c 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -81,7 +81,7 @@ enum QUERY_MODE {
 #define MAX_DB_NAME_SIZE   64
 #define MAX_HOSTNAME_SIZE  64
 #define MAX_TB_NAME_SIZE   64
-#define MAX_DATA_SIZE      (16*1024)
+#define MAX_DATA_SIZE      (16*1024)+20     // max record len: 16*1024, timestamp string and ,('') need extra space
 #define MAX_NUM_DATATYPE   10
 #define OPT_ABORT          1 /* –abort */
 #define STRING_LEN         60000
@@ -188,7 +188,7 @@ typedef struct {
 /* Used by main to communicate with parse_opt. */
 typedef struct SArguments_S {
   char *   metaFile;
-  int      test_mode;
+  uint32_t test_mode;
   char *   host;
   uint16_t port;
   char *   user;
@@ -205,31 +205,31 @@ typedef struct SArguments_S {
   bool     verbose_print;
   bool     performance_print;
   char *   output_file;
-  int      query_mode;
+  uint32_t query_mode;
   char *   datatype[MAX_NUM_DATATYPE + 1];
-  int      len_of_binary;
-  int      num_of_CPR;
-  int      num_of_threads;
-  int64_t  insert_interval;
+  uint32_t len_of_binary;
+  uint32_t num_of_CPR;
+  uint32_t num_of_threads;
+  uint64_t insert_interval;
   int64_t  query_times;
-  int64_t  interlace_rows;
-  int64_t  num_of_RPR;                  // num_of_records_per_req
-  int64_t  max_sql_len;
-  int64_t  num_of_tables;
-  int64_t  num_of_DPT;
+  uint64_t interlace_rows;
+  uint64_t num_of_RPR;                  // num_of_records_per_req
+  uint64_t max_sql_len;
+  uint64_t num_of_tables;
+  uint64_t num_of_DPT;
   int      abort;
   int      disorderRatio;               // 0: no disorder, >0: x%
   int      disorderRange;               // ms or us by database precision
-  int      method_of_delete;
+  uint32_t method_of_delete;
   char **  arg_list;
-  int64_t  totalInsertRows;
-  int64_t  totalAffectedRows;
+  uint64_t totalInsertRows;
+  uint64_t totalAffectedRows;
 } SArguments;
 
 typedef struct SColumn_S {
-  char  field[TSDB_COL_NAME_LEN + 1];
-  char  dataType[MAX_TB_NAME_SIZE];
-  int   dataLen;
+  char      field[TSDB_COL_NAME_LEN + 1];
+  char      dataType[MAX_TB_NAME_SIZE];
+  uint32_t  dataLen;
   char  note[128];
 } StrColumn;
 
@@ -237,50 +237,50 @@ typedef struct SSuperTable_S {
   char         sTblName[MAX_TB_NAME_SIZE+1];
   int64_t      childTblCount;
   bool         childTblExists;          // 0: no, 1: yes
-  int64_t      batchCreateTableNum;     // 0: no batch,  > 0: batch table number in one sql
-  int8_t       autoCreateTable;         // 0: create sub table, 1: auto create sub table
+  uint64_t     batchCreateTableNum;     // 0: no batch,  > 0: batch table number in one sql
+  uint8_t      autoCreateTable;         // 0: create sub table, 1: auto create sub table
   char         childTblPrefix[MAX_TB_NAME_SIZE];
   char         dataSource[MAX_TB_NAME_SIZE+1];  // rand_gen or sample
   char         insertMode[MAX_TB_NAME_SIZE];    // taosc, rest
   int64_t      childTblLimit;
-  int64_t      childTblOffset;
+  uint64_t      childTblOffset;
 
 //  int          multiThreadWriteOneTbl;  // 0: no, 1: yes
-  int64_t      interlaceRows;           //
+  uint64_t     interlaceRows;           //
   int          disorderRatio;           // 0: no disorder, >0: x%
   int          disorderRange;           // ms or us by database precision
-  int64_t      maxSqlLen;               //
+  uint64_t     maxSqlLen;               //
 
-  int64_t      insertInterval;          // insert interval, will override global insert interval
-  int64_t      insertRows;
+  uint64_t     insertInterval;          // insert interval, will override global insert interval
+  uint64_t     insertRows;
   int64_t      timeStampStep;
   char         startTimestamp[MAX_TB_NAME_SIZE];
   char         sampleFormat[MAX_TB_NAME_SIZE];  // csv, json
   char         sampleFile[MAX_FILE_NAME_LEN+1];
   char         tagsFile[MAX_FILE_NAME_LEN+1];
 
-  int          columnCount;
+  uint32_t     columnCount;
   StrColumn    columns[MAX_COLUMN_COUNT];
-  int          tagCount;
+  uint32_t          tagCount;
   StrColumn    tags[MAX_TAG_COUNT];
 
   char*        childTblName;
   char*        colsOfCreateChildTable;
-  int64_t      lenOfOneRow;
-  int64_t      lenOfTagOfOneRow;
+  uint64_t     lenOfOneRow;
+  uint64_t     lenOfTagOfOneRow;
 
   char*        sampleDataBuf;
   //int          sampleRowCount;
   //int          sampleUsePos;
 
-  int          tagSource;    // 0: rand, 1: tag sample
+  uint32_t     tagSource;    // 0: rand, 1: tag sample
   char*        tagDataBuf;
-  int          tagSampleCount;
-  int          tagUsePos;
+  uint32_t     tagSampleCount;
+  uint32_t     tagUsePos;
 
   // statistics
-  int64_t       totalInsertRows;
-  int64_t       totalAffectedRows;
+  uint64_t     totalInsertRows;
+  uint64_t     totalAffectedRows;
 } SSuperTable;
 
 typedef struct {
@@ -307,8 +307,8 @@ typedef struct {
 
 typedef struct SDbCfg_S {
 //  int       maxtablesPerVnode;
-  int       minRows;
-  int       maxRows;
+  uint32_t  minRows;        // 0 means default
+  uint32_t  maxRows;        // 0 means default
   int       comp;
   int       walLevel;
   int       cacheLast;
@@ -327,7 +327,7 @@ typedef struct SDataBase_S {
   char         dbName[MAX_DB_NAME_SIZE];
   bool         drop;  // 0: use exists, 1: if exists, drop then new create
   SDbCfg       dbCfg;
-  int64_t      superTblCount;
+  uint64_t     superTblCount;
   SSuperTable  superTbls[MAX_SUPER_TABLE_COUNT];
 } SDataBase;
 
@@ -345,57 +345,57 @@ typedef struct SDbs_S {
   bool         do_aggreFunc;
   bool         queryMode;
 
-  int          threadCount;
-  int          threadCountByCreateTbl;
-  int          dbCount;
+  uint32_t     threadCount;
+  uint32_t     threadCountByCreateTbl;
+  uint32_t     dbCount;
   SDataBase    db[MAX_DB_COUNT];
 
   // statistics
-  int64_t       totalInsertRows;
-  int64_t       totalAffectedRows;
+  uint64_t     totalInsertRows;
+  uint64_t     totalAffectedRows;
 
 } SDbs;
 
 typedef struct SpecifiedQueryInfo_S {
-  int64_t      queryInterval;  // 0: unlimit  > 0   loop/s
-  int64_t      concurrent;
-  int64_t      sqlCount;
-  int          mode; // 0: sync, 1: async
-  int64_t      subscribeInterval; // ms
-  int64_t      queryTimes;
+  uint64_t     queryInterval;  // 0: unlimit  > 0   loop/s
+  uint64_t     concurrent;
+  uint64_t     sqlCount;
+  uint32_t     mode; // 0: sync, 1: async
+  uint64_t     subscribeInterval; // ms
+  uint64_t     queryTimes;
   int          subscribeRestart;
   int          subscribeKeepProgress;
   char         sql[MAX_QUERY_SQL_COUNT][MAX_QUERY_SQL_LENGTH+1];
   char         result[MAX_QUERY_SQL_COUNT][MAX_FILE_NAME_LEN+1];
   TAOS_SUB*    tsub[MAX_QUERY_SQL_COUNT];
-  int64_t      totalQueried;
+  uint64_t     totalQueried;
 } SpecifiedQueryInfo;
 
 typedef struct SuperQueryInfo_S {
   char         sTblName[MAX_TB_NAME_SIZE+1];
-  int64_t      queryInterval;  // 0: unlimit  > 0   loop/s
-  int          threadCnt;
-  int          mode; // 0: sync, 1: async
-  int64_t      subscribeInterval; // ms
+  uint64_t     queryInterval;  // 0: unlimit  > 0   loop/s
+  uint32_t     threadCnt;
+  uint32_t     mode; // 0: sync, 1: async
+  uint64_t     subscribeInterval; // ms
   int          subscribeRestart;
   int          subscribeKeepProgress;
-  int64_t      queryTimes;
-  int64_t      childTblCount;
+  uint64_t     queryTimes;
+  uint64_t     childTblCount;
   char         childTblPrefix[MAX_TB_NAME_SIZE];
-  int64_t      sqlCount;
+  uint64_t     sqlCount;
   char         sql[MAX_QUERY_SQL_COUNT][MAX_QUERY_SQL_LENGTH+1];
   char         result[MAX_QUERY_SQL_COUNT][MAX_FILE_NAME_LEN+1];
   TAOS_SUB*    tsub[MAX_QUERY_SQL_COUNT];
 
   char*        childTblName;
-  int64_t      totalQueried;
+  uint64_t     totalQueried;
 } SuperQueryInfo;
 
 typedef struct SQueryMetaInfo_S {
   char         cfgDir[MAX_FILE_NAME_LEN+1];
   char         host[MAX_HOSTNAME_SIZE];
   uint16_t     port;
-  struct sockaddr_in serv_addr;
+  struct       sockaddr_in serv_addr;
   char         user[MAX_USERNAME_SIZE];
   char         password[MAX_PASSWORD_SIZE];
   char         dbName[MAX_DB_NAME_SIZE+1];
@@ -403,47 +403,47 @@ typedef struct SQueryMetaInfo_S {
 
   SpecifiedQueryInfo  specifiedQueryInfo;
   SuperQueryInfo    superQueryInfo;
-  int64_t      totalQueried;
+  uint64_t     totalQueried;
 } SQueryMetaInfo;
 
 typedef struct SThreadInfo_S {
-  TAOS *taos;
-  int threadID;
-  char db_name[MAX_DB_NAME_SIZE+1];
-  uint32_t time_precision;
-  char fp[4096];
-  char tb_prefix[MAX_TB_NAME_SIZE];
-  int64_t start_table_from;
-  int64_t end_table_to;
-  int64_t ntables;
-  int64_t data_of_rate;
-  int64_t start_time;
-  char* cols;
-  bool  use_metric;
+  TAOS *    taos;
+  int       threadID;
+  char      db_name[MAX_DB_NAME_SIZE+1];
+  uint32_t  time_precision;
+  char      fp[4096];
+  char      tb_prefix[MAX_TB_NAME_SIZE];
+  uint64_t  start_table_from;
+  uint64_t  end_table_to;
+  uint64_t  ntables;
+  uint64_t  data_of_rate;
+  int64_t   start_time;
+  char*     cols;
+  bool      use_metric;
   SSuperTable* superTblInfo;
 
   // for async insert
-  tsem_t lock_sem;
-  int64_t  counter;
+  tsem_t    lock_sem;
+  int64_t   counter;
   uint64_t  st;
   uint64_t  et;
-  int64_t  lastTs;
+  uint64_t  lastTs;
 
   // sample data
-  int64_t samplePos;
+  int64_t   samplePos;
   // statistics
-  int64_t totalInsertRows;
-  int64_t totalAffectedRows;
+  uint64_t  totalInsertRows;
+  uint64_t  totalAffectedRows;
 
   // insert delay statistics
-  int64_t cntDelay;
-  int64_t totalDelay;
-  int64_t avgDelay;
-  int64_t maxDelay;
-  int64_t minDelay;
+  uint64_t  cntDelay;
+  uint64_t  totalDelay;
+  uint64_t  avgDelay;
+  uint64_t  maxDelay;
+  uint64_t  minDelay;
 
   // query
-  int64_t querySeq;   // sequence number of sql command
+  uint64_t  querySeq;   // sequence number of sql command
 } threadInfo;
 
 #ifdef WINDOWS
@@ -569,7 +569,7 @@ SArguments g_args = {
                      1,               // query_times
                      0,               // interlace_rows;
                      30000,           // num_of_RPR
-                     1024000,         // max_sql_len
+                     (1024*1024),         // max_sql_len
                      10000,           // num_of_tables
                      10000,           // num_of_DPT
                      0,               // abort
@@ -666,11 +666,11 @@ static void printHelp() {
   printf("%s%s%s%s\n", indent, "-q", indent,
           "Query mode -- 0: SYNC, 1: ASYNC. Default is SYNC.");
   printf("%s%s%s%s\n", indent, "-b", indent,
-          "The data_type of columns, default: TINYINT,SMALLINT,INT,BIGINT,FLOAT,DOUBLE,BINARY,NCHAR,BOOL,TIMESTAMP.");
+          "The data_type of columns, default: INT,INT,INT,INT.");
   printf("%s%s%s%s\n", indent, "-w", indent,
           "The length of data_type 'BINARY' or 'NCHAR'. Default is 16");
   printf("%s%s%s%s\n", indent, "-l", indent,
-          "The number of columns per record. Default is 10.");
+          "The number of columns per record. Default is 4.");
   printf("%s%s%s%s\n", indent, "-T", indent,
           "The number of threads. Default is 10.");
   printf("%s%s%s%s\n", indent, "-i", indent,
@@ -725,7 +725,7 @@ static void parse_args(int argc, char *argv[], SArguments *arguments) {
         errorPrint("%s", "\n\t-c need a valid path following!\n");
         exit(EXIT_FAILURE);
       }
-      tstrncpy(configDir, argv[++i], MAX_FILE_NAME_LEN);
+      tstrncpy(configDir, argv[++i], TSDB_FILENAME_LEN);
 
     } else if (strcmp(argv[i], "-h") == 0) {
       if (argc == i+1) {
@@ -967,9 +967,9 @@ static void parse_args(int argc, char *argv[], SArguments *arguments) {
       }
     } else if (strcmp(argv[i], "-D") == 0) {
       arguments->method_of_delete = atoi(argv[++i]);
-      if (arguments->method_of_delete < 0
-              || arguments->method_of_delete > 3) {
-        arguments->method_of_delete = 0;
+      if (arguments->method_of_delete > 3) {
+        errorPrint("%s", "\n\t-D need a valud (0~3) number following!\n");
+        exit(EXIT_FAILURE);
       }
     } else if ((strcmp(argv[i], "--version") == 0) ||
         (strcmp(argv[i], "-V") == 0)){
@@ -1004,17 +1004,17 @@ static void parse_args(int argc, char *argv[], SArguments *arguments) {
                 break;
         printf("\n");
     }
-    printf("# Insertion interval:                %"PRId64"\n",
+    printf("# Insertion interval:                %"PRIu64"\n",
             arguments->insert_interval);
-    printf("# Number of records per req:         %"PRId64"\n",
+    printf("# Number of records per req:         %"PRIu64"\n",
             arguments->num_of_RPR);
-    printf("# Max SQL length:                    %"PRId64"\n",
+    printf("# Max SQL length:                    %"PRIu64"\n",
             arguments->max_sql_len);
     printf("# Length of Binary:                  %d\n", arguments->len_of_binary);
     printf("# Number of Threads:                 %d\n", arguments->num_of_threads);
-    printf("# Number of Tables:                  %"PRId64"\n",
+    printf("# Number of Tables:                  %"PRIu64"\n",
             arguments->num_of_tables);
-    printf("# Number of Data per Table:          %"PRId64"\n",
+    printf("# Number of Data per Table:          %"PRIu64"\n",
             arguments->num_of_DPT);
     printf("# Database name:                     %s\n", arguments->database);
     printf("# Table prefix:                      %s\n", arguments->tb_prefix);
@@ -1191,13 +1191,31 @@ static float rand_float(){
   return randfloat[cursor];
 }
 
+#if 0
+static const char charNum[] = "0123456789";
+
+static void nonrand_string(char *, int) __attribute__ ((unused));   // reserve for debugging purpose
+static void nonrand_string(char *str, int size)
+{
+  str[0] = 0;
+  if (size > 0) {
+    int n;
+    for (n = 0; n < size; n++) {
+      str[n] = charNum[n % 10];
+    }
+    str[n] = 0;
+  }
+}
+#endif
+
 static const char charset[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
+
 static void rand_string(char *str, int size) {
   str[0] = 0;
   if (size > 0) {
     //--size;
     int n;
-    for (n = 0; n < size - 1; n++) {
+    for (n = 0; n < size; n++) {
       int key = abs(rand_tinyint()) % (int)(sizeof(charset) - 1);
       str[n] = charset[key];
     }
@@ -1252,11 +1270,11 @@ static int printfInsertMeta() {
   printf("resultFile:                 \033[33m%s\033[0m\n", g_Dbs.resultFile);
   printf("thread num of insert data:  \033[33m%d\033[0m\n", g_Dbs.threadCount);
   printf("thread num of create table: \033[33m%d\033[0m\n", g_Dbs.threadCountByCreateTbl);
-  printf("top insert interval:        \033[33m%"PRId64"\033[0m\n",
+  printf("top insert interval:        \033[33m%"PRIu64"\033[0m\n",
           g_args.insert_interval);
-  printf("number of records per req:  \033[33m%"PRId64"\033[0m\n",
+  printf("number of records per req:  \033[33m%"PRIu64"\033[0m\n",
           g_args.num_of_RPR);
-  printf("max sql length:             \033[33m%"PRId64"\033[0m\n",
+  printf("max sql length:             \033[33m%"PRIu64"\033[0m\n",
           g_args.max_sql_len);
 
   printf("database count:             \033[33m%d\033[0m\n", g_Dbs.dbCount);
@@ -1318,10 +1336,10 @@ static int printfInsertMeta() {
       }
     }
 
-    printf("  super table count:     \033[33m%"PRId64"\033[0m\n",
+    printf("  super table count:     \033[33m%"PRIu64"\033[0m\n",
         g_Dbs.db[i].superTblCount);
-    for (int64_t j = 0; j < g_Dbs.db[i].superTblCount; j++) {
-      printf("  super table[\033[33m%"PRId64"\033[0m]:\n", j);
+    for (uint64_t j = 0; j < g_Dbs.db[i].superTblCount; j++) {
+      printf("  super table[\033[33m%"PRIu64"\033[0m]:\n", j);
 
       printf("      stbName:           \033[33m%s\033[0m\n",
           g_Dbs.db[i].superTbls[j].sTblName);
@@ -1342,7 +1360,7 @@ static int printfInsertMeta() {
         printf("      childTblExists:    \033[33m%s\033[0m\n",  "error");
       }
 
-      printf("      childTblCount:     \033[33m%"PRId64"\033[0m\n",
+      printf("      childTblCount:     \033[33m%"PRIu64"\033[0m\n",
               g_Dbs.db[i].superTbls[j].childTblCount);
       printf("      childTblPrefix:    \033[33m%s\033[0m\n",
               g_Dbs.db[i].superTbls[j].childTblPrefix);
@@ -1354,11 +1372,11 @@ static int printfInsertMeta() {
         printf("      childTblLimit:     \033[33m%"PRId64"\033[0m\n",
                 g_Dbs.db[i].superTbls[j].childTblLimit);
       }
-      if (g_Dbs.db[i].superTbls[j].childTblOffset >= 0) {
-        printf("      childTblOffset:    \033[33m%"PRId64"\033[0m\n",
+      if (g_Dbs.db[i].superTbls[j].childTblOffset > 0) {
+        printf("      childTblOffset:    \033[33m%"PRIu64"\033[0m\n",
                 g_Dbs.db[i].superTbls[j].childTblOffset);
       }
-      printf("      insertRows:        \033[33m%"PRId64"\033[0m\n",
+      printf("      insertRows:        \033[33m%"PRIu64"\033[0m\n",
               g_Dbs.db[i].superTbls[j].insertRows);
 /*
       if (0 == g_Dbs.db[i].superTbls[j].multiThreadWriteOneTbl) {
@@ -1367,11 +1385,11 @@ static int printfInsertMeta() {
         printf("      multiThreadWriteOneTbl:  \033[33myes\033[0m\n");
       }
       */
-      printf("      interlaceRows:     \033[33m%"PRId64"\033[0m\n",
+      printf("      interlaceRows:     \033[33m%"PRIu64"\033[0m\n",
               g_Dbs.db[i].superTbls[j].interlaceRows);
 
       if (g_Dbs.db[i].superTbls[j].interlaceRows > 0) {
-        printf("      stable insert interval:   \033[33m%"PRId64"\033[0m\n",
+        printf("      stable insert interval:   \033[33m%"PRIu64"\033[0m\n",
             g_Dbs.db[i].superTbls[j].insertInterval);
       }
 
@@ -1379,7 +1397,7 @@ static int printfInsertMeta() {
               g_Dbs.db[i].superTbls[j].disorderRange);
       printf("      disorderRatio:     \033[33m%d\033[0m\n",
               g_Dbs.db[i].superTbls[j].disorderRatio);
-      printf("      maxSqlLen:         \033[33m%"PRId64"\033[0m\n",
+      printf("      maxSqlLen:         \033[33m%"PRIu64"\033[0m\n",
               g_Dbs.db[i].superTbls[j].maxSqlLen);
       printf("      timeStampStep:     \033[33m%"PRId64"\033[0m\n",
               g_Dbs.db[i].superTbls[j].timeStampStep);
@@ -1445,8 +1463,8 @@ static void printfInsertMetaToFile(FILE* fp) {
   fprintf(fp, "resultFile:                 %s\n", g_Dbs.resultFile);
   fprintf(fp, "thread num of insert data:  %d\n", g_Dbs.threadCount);
   fprintf(fp, "thread num of create table: %d\n", g_Dbs.threadCountByCreateTbl);
-  fprintf(fp, "number of records per req:  %"PRId64"\n", g_args.num_of_RPR);
-  fprintf(fp, "max sql length:             %"PRId64"\n", g_args.max_sql_len);
+  fprintf(fp, "number of records per req:  %"PRIu64"\n", g_args.num_of_RPR);
+  fprintf(fp, "max sql length:             %"PRIu64"\n", g_args.max_sql_len);
   fprintf(fp, "database count:          %d\n", g_Dbs.dbCount);
 
   for (int i = 0; i < g_Dbs.dbCount; i++) {
@@ -1503,7 +1521,7 @@ static void printfInsertMetaToFile(FILE* fp) {
       }
     }
 
-    fprintf(fp, "  super table count:     %"PRId64"\n", g_Dbs.db[i].superTblCount);
+    fprintf(fp, "  super table count:     %"PRIu64"\n", g_Dbs.db[i].superTblCount);
     for (int j = 0; j < g_Dbs.db[i].superTblCount; j++) {
       fprintf(fp, "  super table[%d]:\n", j);
 
@@ -1525,7 +1543,7 @@ static void printfInsertMetaToFile(FILE* fp) {
         fprintf(fp, "      childTblExists:    %s\n",  "error");
       }
 
-      fprintf(fp, "      childTblCount:     %"PRId64"\n",
+      fprintf(fp, "      childTblCount:     %"PRIu64"\n",
               g_Dbs.db[i].superTbls[j].childTblCount);
       fprintf(fp, "      childTblPrefix:    %s\n",
               g_Dbs.db[i].superTbls[j].childTblPrefix);
@@ -1533,12 +1551,12 @@ static void printfInsertMetaToFile(FILE* fp) {
               g_Dbs.db[i].superTbls[j].dataSource);
       fprintf(fp, "      insertMode:        %s\n",
               g_Dbs.db[i].superTbls[j].insertMode);
-      fprintf(fp, "      insertRows:        %"PRId64"\n",
+      fprintf(fp, "      insertRows:        %"PRIu64"\n",
               g_Dbs.db[i].superTbls[j].insertRows);
-      fprintf(fp, "      interlace rows:    %"PRId64"\n",
+      fprintf(fp, "      interlace rows:    %"PRIu64"\n",
               g_Dbs.db[i].superTbls[j].interlaceRows);
       if (g_Dbs.db[i].superTbls[j].interlaceRows > 0) {
-        fprintf(fp, "      stable insert interval:   %"PRId64"\n",
+        fprintf(fp, "      stable insert interval:   %"PRIu64"\n",
                 g_Dbs.db[i].superTbls[j].insertInterval);
       }
 /*
@@ -1548,11 +1566,11 @@ static void printfInsertMetaToFile(FILE* fp) {
         fprintf(fp, "      multiThreadWriteOneTbl:  yes\n");
       }
       */
-      fprintf(fp, "      interlaceRows:     %"PRId64"\n",
+      fprintf(fp, "      interlaceRows:     %"PRIu64"\n",
               g_Dbs.db[i].superTbls[j].interlaceRows);
       fprintf(fp, "      disorderRange:     %d\n",  g_Dbs.db[i].superTbls[j].disorderRange);
       fprintf(fp, "      disorderRatio:     %d\n",  g_Dbs.db[i].superTbls[j].disorderRatio);
-      fprintf(fp, "      maxSqlLen:         %"PRId64"\n",
+      fprintf(fp, "      maxSqlLen:         %"PRIu64"\n",
               g_Dbs.db[i].superTbls[j].maxSqlLen);
 
       fprintf(fp, "      timeStampStep:     %"PRId64"\n",
@@ -1613,21 +1631,21 @@ static void printfQueryMeta() {
 
   printf("\n");
   printf("specified table query info:                   \n");
-  printf("query interval: \033[33m%"PRId64" ms\033[0m\n",
+  printf("query interval: \033[33m%"PRIu64" ms\033[0m\n",
       g_queryInfo.specifiedQueryInfo.queryInterval);
-  printf("top query times:\033[33m%"PRId64"\033[0m\n", g_args.query_times);
-  printf("concurrent:     \033[33m%"PRId64"\033[0m\n",
+  printf("top query times:\033[33m%"PRIu64"\033[0m\n", g_args.query_times);
+  printf("concurrent:     \033[33m%"PRIu64"\033[0m\n",
       g_queryInfo.specifiedQueryInfo.concurrent);
-  printf("sqlCount:       \033[33m%"PRId64"\033[0m\n",
+  printf("sqlCount:       \033[33m%"PRIu64"\033[0m\n",
       g_queryInfo.specifiedQueryInfo.sqlCount);
   printf("specified tbl query times:\n");
-  printf("                \033[33m%"PRId64"\033[0m\n",
+  printf("                \033[33m%"PRIu64"\033[0m\n",
       g_queryInfo.specifiedQueryInfo.queryTimes);
 
   if (SUBSCRIBE_TEST == g_args.test_mode) {
     printf("mod:            \033[33m%d\033[0m\n",
         g_queryInfo.specifiedQueryInfo.mode);
-    printf("interval:       \033[33m%"PRId64"\033[0m\n",
+    printf("interval:       \033[33m%"PRIu64"\033[0m\n",
         g_queryInfo.specifiedQueryInfo.subscribeInterval);
     printf("restart:        \033[33m%d\033[0m\n",
         g_queryInfo.specifiedQueryInfo.subscribeRestart);
@@ -1635,27 +1653,27 @@ static void printfQueryMeta() {
         g_queryInfo.specifiedQueryInfo.subscribeKeepProgress);
   }
 
-  for (int64_t i = 0; i < g_queryInfo.specifiedQueryInfo.sqlCount; i++) {
-    printf("  sql[%"PRId64"]: \033[33m%s\033[0m\n",
+  for (uint64_t i = 0; i < g_queryInfo.specifiedQueryInfo.sqlCount; i++) {
+    printf("  sql[%"PRIu64"]: \033[33m%s\033[0m\n",
         i, g_queryInfo.specifiedQueryInfo.sql[i]);
   }
   printf("\n");
   printf("super table query info:\n");
-  printf("query interval: \033[33m%"PRId64"\033[0m\n",
+  printf("query interval: \033[33m%"PRIu64"\033[0m\n",
       g_queryInfo.superQueryInfo.queryInterval);
   printf("threadCnt:      \033[33m%d\033[0m\n",
       g_queryInfo.superQueryInfo.threadCnt);
-  printf("childTblCount:  \033[33m%"PRId64"\033[0m\n",
+  printf("childTblCount:  \033[33m%"PRIu64"\033[0m\n",
       g_queryInfo.superQueryInfo.childTblCount);
   printf("stable name:    \033[33m%s\033[0m\n",
       g_queryInfo.superQueryInfo.sTblName);
-  printf("stb query times:\033[33m%"PRId64"\033[0m\n",
+  printf("stb query times:\033[33m%"PRIu64"\033[0m\n",
       g_queryInfo.superQueryInfo.queryTimes);
 
   if (SUBSCRIBE_TEST == g_args.test_mode) {
     printf("mod:            \033[33m%d\033[0m\n",
         g_queryInfo.superQueryInfo.mode);
-    printf("interval:       \033[33m%"PRId64"\033[0m\n",
+    printf("interval:       \033[33m%"PRIu64"\033[0m\n",
         g_queryInfo.superQueryInfo.subscribeInterval);
     printf("restart:        \033[33m%d\033[0m\n",
         g_queryInfo.superQueryInfo.subscribeRestart);
@@ -1663,7 +1681,7 @@ static void printfQueryMeta() {
         g_queryInfo.superQueryInfo.subscribeKeepProgress);
   }
 
-  printf("sqlCount:       \033[33m%"PRId64"\033[0m\n",
+  printf("sqlCount:       \033[33m%"PRIu64"\033[0m\n",
       g_queryInfo.superQueryInfo.sqlCount);
   for (int i = 0; i < g_queryInfo.superQueryInfo.sqlCount; i++) {
     printf("  sql[%d]: \033[33m%s\033[0m\n",
@@ -2272,7 +2290,7 @@ static int calcRowLen(SSuperTable*  superTbls) {
 
 static int getChildNameOfSuperTableWithLimitAndOffset(TAOS * taos,
         char* dbName, char* sTblName, char** childTblNameOfSuperTbl,
-        int64_t* childTblCountOfSuperTbl, int64_t limit, int64_t offset) {
+        uint64_t* childTblCountOfSuperTbl, int64_t limit, uint64_t offset) {
 
   char command[BUFFER_SIZE] = "\0";
   char limitBuf[100] = "\0";
@@ -2283,7 +2301,7 @@ static int getChildNameOfSuperTableWithLimitAndOffset(TAOS * taos,
   char* childTblName = *childTblNameOfSuperTbl;
 
   if (offset >= 0) {
-    snprintf(limitBuf, 100, " limit %"PRId64" offset %"PRId64"",
+    snprintf(limitBuf, 100, " limit %"PRId64" offset %"PRIu64"",
             limit, offset);
   }
 
@@ -2349,11 +2367,11 @@ static int getChildNameOfSuperTableWithLimitAndOffset(TAOS * taos,
 
 static int getAllChildNameOfSuperTable(TAOS * taos, char* dbName,
         char* sTblName, char** childTblNameOfSuperTbl,
-        int64_t* childTblCountOfSuperTbl) {
+        uint64_t* childTblCountOfSuperTbl) {
 
     return getChildNameOfSuperTableWithLimitAndOffset(taos, dbName, sTblName,
             childTblNameOfSuperTbl, childTblCountOfSuperTbl,
-            -1, -1);
+            -1, 0);
 }
 
 static int getSuperTableFromServer(TAOS * taos, char* dbName,
@@ -2689,7 +2707,7 @@ static int createDatabasesAndStables() {
       printf("\ncreate database %s success!\n\n", g_Dbs.db[i].dbName);
     }
 
-    debugPrint("%s() LN%d supertbl count:%"PRId64"\n",
+    debugPrint("%s() LN%d supertbl count:%"PRIu64"\n",
             __func__, __LINE__, g_Dbs.db[i].superTblCount);
 
     int validStbCount = 0;
@@ -2748,15 +2766,15 @@ static void* createTable(void *sarg)
   int len = 0;
   int batchNum = 0;
 
-  verbosePrint("%s() LN%d: Creating table from %"PRId64" to %"PRId64"\n",
+  verbosePrint("%s() LN%d: Creating table from %"PRIu64" to %"PRIu64"\n",
           __func__, __LINE__,
           pThreadInfo->start_table_from, pThreadInfo->end_table_to);
 
-  for (int64_t i = pThreadInfo->start_table_from;
+  for (uint64_t i = pThreadInfo->start_table_from;
           i <= pThreadInfo->end_table_to; i++) {
     if (0 == g_Dbs.use_metric) {
       snprintf(buffer, buff_len,
-              "create table if not exists %s.%s%"PRId64" %s;",
+              "create table if not exists %s.%s%"PRIu64" %s;",
               pThreadInfo->db_name,
               g_args.tb_prefix, i,
               pThreadInfo->cols);
@@ -2787,7 +2805,7 @@ static void* createTable(void *sarg)
         }
         len += snprintf(buffer + len,
                 buff_len - len,
-                "if not exists %s.%s%"PRId64" using %s.%s tags %s ",
+                "if not exists %s.%s%"PRIu64" using %s.%s tags %s ",
                 pThreadInfo->db_name, superTblInfo->childTblPrefix,
                 i, pThreadInfo->db_name,
                 superTblInfo->sTblName, tagsValBuf);
@@ -2811,7 +2829,7 @@ static void* createTable(void *sarg)
 
     int64_t  currentPrintTime = taosGetTimestampMs();
     if (currentPrintTime - lastPrintTime > 30*1000) {
-      printf("thread[%d] already create %"PRId64" - %"PRId64" tables\n",
+      printf("thread[%d] already create %"PRIu64" - %"PRIu64" tables\n",
               pThreadInfo->threadID, pThreadInfo->start_table_from, i);
       lastPrintTime = currentPrintTime;
     }
@@ -2879,7 +2897,7 @@ static int startMultiThreadCreateChildTable(
     startFrom = t_info->end_table_to + 1;
     t_info->use_metric = true;
     t_info->cols = cols;
-    t_info->minDelay = INT64_MAX;
+    t_info->minDelay = UINT64_MAX;
     pthread_create(pids + i, NULL, createTable, t_info);
   }
 
@@ -2945,7 +2963,7 @@ static void createChildTables() {
 
       snprintf(tblColsBuf + len, MAX_SQL_SIZE - len, ")");
 
-      verbosePrint("%s() LN%d: dbName: %s num of tb: %"PRId64" schema: %s\n",
+      verbosePrint("%s() LN%d: dbName: %s num of tb: %"PRIu64" schema: %s\n",
               __func__, __LINE__,
               g_Dbs.db[i].dbName, g_args.num_of_tables, tblColsBuf);
       startMultiThreadCreateChildTable(
@@ -3073,7 +3091,7 @@ static int readSampleFromCsvFileToMem(
     }
 
     if (readLen > superTblInfo->lenOfOneRow) {
-      printf("sample row len[%d] overflow define schema len[%"PRId64"], so discard this row\n",
+      printf("sample row len[%d] overflow define schema len[%"PRIu64"], so discard this row\n",
               (int32_t)readLen, superTblInfo->lenOfOneRow);
       continue;
     }
@@ -3316,7 +3334,7 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
   if (threads2 && threads2->type == cJSON_Number) {
     g_Dbs.threadCountByCreateTbl = threads2->valueint;
   } else if (!threads2) {
-    g_Dbs.threadCountByCreateTbl = g_args.num_of_threads;
+    g_Dbs.threadCountByCreateTbl = 1;
   } else {
     errorPrint("%s() LN%d, failed to read json, threads2 not found\n",
             __func__, __LINE__);
@@ -3325,6 +3343,11 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
 
   cJSON* gInsertInterval = cJSON_GetObjectItem(root, "insert_interval");
   if (gInsertInterval && gInsertInterval->type == cJSON_Number) {
+    if (gInsertInterval->valueint <0) {
+      errorPrint("%s() LN%d, failed to read json, insert interval input mistake\n",
+            __func__, __LINE__);
+      goto PARSE_OVER;
+    }
     g_args.insert_interval = gInsertInterval->valueint;
   } else if (!gInsertInterval) {
     g_args.insert_interval = 0;
@@ -3336,13 +3359,19 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
 
   cJSON* interlaceRows = cJSON_GetObjectItem(root, "interlace_rows");
   if (interlaceRows && interlaceRows->type == cJSON_Number) {
+    if (interlaceRows->valueint < 0) {
+      errorPrint("%s() LN%d, failed to read json, interlace_rows input mistake\n",
+        __func__, __LINE__);
+      goto PARSE_OVER;
+
+    }
     g_args.interlace_rows = interlaceRows->valueint;
 
     // rows per table need be less than insert batch
     if (g_args.interlace_rows > g_args.num_of_RPR) {
-      printf("NOTICE: interlace rows value %"PRId64" > num_of_records_per_req %"PRId64"\n\n",
+      printf("NOTICE: interlace rows value %"PRIu64" > num_of_records_per_req %"PRIu64"\n\n",
               g_args.interlace_rows, g_args.num_of_RPR);
-      printf("        interlace rows value will be set to num_of_records_per_req %"PRId64"\n\n",
+      printf("        interlace rows value will be set to num_of_records_per_req %"PRIu64"\n\n",
               g_args.num_of_RPR);
       printf("        press Enter key to continue or Ctrl-C to stop.");
       (void)getchar();
@@ -3358,9 +3387,14 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
 
   cJSON* maxSqlLen = cJSON_GetObjectItem(root, "max_sql_len");
   if (maxSqlLen && maxSqlLen->type == cJSON_Number) {
+    if (maxSqlLen->valueint < 0) {
+      errorPrint("%s() LN%d, failed to read json, max_sql_len input mistake\n",
+        __func__, __LINE__);
+      goto PARSE_OVER;
+    }
     g_args.max_sql_len = maxSqlLen->valueint;
   } else if (!maxSqlLen) {
-    g_args.max_sql_len = 1024000;
+    g_args.max_sql_len = (1024*1024);
   } else {
     errorPrint("%s() LN%d, failed to read json, max_sql_len input mistake\n",
         __func__, __LINE__);
@@ -3369,9 +3403,14 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
 
   cJSON* numRecPerReq = cJSON_GetObjectItem(root, "num_of_records_per_req");
   if (numRecPerReq && numRecPerReq->type == cJSON_Number) {
+    if (numRecPerReq->valueint < 0) {
+      errorPrint("%s() LN%d, failed to read json, num_of_records_per_req input mistake\n",
+        __func__, __LINE__);
+      goto PARSE_OVER;
+    }
     g_args.num_of_RPR = numRecPerReq->valueint;
   } else if (!numRecPerReq) {
-    g_args.num_of_RPR = INT64_MAX;
+    g_args.num_of_RPR = UINT64_MAX;
   } else {
     errorPrint("%s() LN%d, failed to read json, num_of_records_per_req not found\n",
         __func__, __LINE__);
@@ -3531,7 +3570,7 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
     if (minRows && minRows->type == cJSON_Number) {
       g_Dbs.db[i].dbCfg.minRows = minRows->valueint;
     } else if (!minRows) {
-      g_Dbs.db[i].dbCfg.minRows = -1;
+      g_Dbs.db[i].dbCfg.minRows = 0;    // 0 means default
     } else {
      printf("ERROR: failed to read json, minRows not found\n");
      goto PARSE_OVER;
@@ -3541,7 +3580,7 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
     if (maxRows && maxRows->type == cJSON_Number) {
       g_Dbs.db[i].dbCfg.maxRows = maxRows->valueint;
     } else if (!maxRows) {
-      g_Dbs.db[i].dbCfg.maxRows = -1;
+      g_Dbs.db[i].dbCfg.maxRows = 0;    // 0 means default
     } else {
      printf("ERROR: failed to read json, maxRows not found\n");
      goto PARSE_OVER;
@@ -3686,7 +3725,7 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
 
       cJSON* count = cJSON_GetObjectItem(stbInfo, "childtable_count");
       if (!count || count->type != cJSON_Number || 0 >= count->valueint) {
-        errorPrint("%s() LN%d, failed to read json, childtable_count not found\n",
+        errorPrint("%s() LN%d, failed to read json, childtable_count input mistake\n",
                 __func__, __LINE__);
         goto PARSE_OVER;
       }
@@ -3840,12 +3879,17 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
 */
       cJSON* interlaceRows = cJSON_GetObjectItem(stbInfo, "interlace_rows");
       if (interlaceRows && interlaceRows->type == cJSON_Number) {
+        if (interlaceRows->valueint < 0) {
+          errorPrint("%s() LN%d, failed to read json, interlace rows input mistake\n",
+            __func__, __LINE__);
+          goto PARSE_OVER;
+        }
         g_Dbs.db[i].superTbls[j].interlaceRows = interlaceRows->valueint;
         // rows per table need be less than insert batch
         if (g_Dbs.db[i].superTbls[j].interlaceRows > g_args.num_of_RPR) {
-          printf("NOTICE: db[%d].superTbl[%d]'s interlace rows value %"PRId64" > num_of_records_per_req %"PRId64"\n\n",
+          printf("NOTICE: db[%d].superTbl[%d]'s interlace rows value %"PRIu64" > num_of_records_per_req %"PRIu64"\n\n",
                   i, j, g_Dbs.db[i].superTbls[j].interlaceRows, g_args.num_of_RPR);
-          printf("        interlace rows value will be set to num_of_records_per_req %"PRId64"\n\n",
+          printf("        interlace rows value will be set to num_of_records_per_req %"PRIu64"\n\n",
                   g_args.num_of_RPR);
           printf("        press Enter key to continue or Ctrl-C to stop.");
           (void)getchar();
@@ -3888,6 +3932,11 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
 
       cJSON* insertRows = cJSON_GetObjectItem(stbInfo, "insert_rows");
       if (insertRows && insertRows->type == cJSON_Number) {
+        if (insertRows->valueint < 0) {
+          errorPrint("%s() LN%d, failed to read json, insert_rows input mistake\n",
+                __func__, __LINE__);
+          goto PARSE_OVER;
+        }
         g_Dbs.db[i].superTbls[j].insertRows = insertRows->valueint;
       } else if (!insertRows) {
         g_Dbs.db[i].superTbls[j].insertRows = 0x7FFFFFFFFFFFFFFF;
@@ -3900,8 +3949,13 @@ static bool getMetaFromInsertJsonFile(cJSON* root) {
       cJSON* insertInterval = cJSON_GetObjectItem(stbInfo, "insert_interval");
       if (insertInterval && insertInterval->type == cJSON_Number) {
         g_Dbs.db[i].superTbls[j].insertInterval = insertInterval->valueint;
+        if (insertInterval->valueint < 0) {
+          errorPrint("%s() LN%d, failed to read json, insert_interval input mistake\n",
+                __func__, __LINE__);
+          goto PARSE_OVER;
+        }
       } else if (!insertInterval) {
-        verbosePrint("%s() LN%d: stable insert interval be overrided by global %"PRId64".\n",
+        verbosePrint("%s() LN%d: stable insert interval be overrided by global %"PRIu64".\n",
                 __func__, __LINE__, g_args.insert_interval);
         g_Dbs.db[i].superTbls[j].insertInterval = g_args.insert_interval;
       } else {
@@ -3982,6 +4036,11 @@ static bool getMetaFromQueryJsonFile(cJSON* root) {
 
   cJSON* gQueryTimes = cJSON_GetObjectItem(root, "query_times");
   if (gQueryTimes && gQueryTimes->type == cJSON_Number) {
+    if (gQueryTimes->valueint < 0) {
+      errorPrint("%s() LN%d, failed to read json, query_times input mistake\n",
+        __func__, __LINE__);
+      goto PARSE_OVER;
+    }
     g_args.query_times = gQueryTimes->valueint;
   } else if (!gQueryTimes) {
     g_args.query_times = 1;
@@ -4009,10 +4068,10 @@ static bool getMetaFromQueryJsonFile(cJSON* root) {
     goto PARSE_OVER;
   }
 
-  // super_table_query
+  // specified_table_query
   cJSON *specifiedQuery = cJSON_GetObjectItem(root, "specified_table_query");
   if (!specifiedQuery) {
-    g_queryInfo.specifiedQueryInfo.concurrent = 0;
+    g_queryInfo.specifiedQueryInfo.concurrent = 1;
     g_queryInfo.specifiedQueryInfo.sqlCount = 0;
   } else if (specifiedQuery->type != cJSON_Object) {
     printf("ERROR: failed to read json, super_table_query not found\n");
@@ -4028,6 +4087,12 @@ static bool getMetaFromQueryJsonFile(cJSON* root) {
     cJSON* specifiedQueryTimes = cJSON_GetObjectItem(specifiedQuery,
         "query_times");
     if (specifiedQueryTimes && specifiedQueryTimes->type == cJSON_Number) {
+      if (specifiedQueryTimes->valueint < 0) {
+        errorPrint("%s() LN%d, failed to read json, query_times input mistake\n",
+          __func__, __LINE__);
+        goto PARSE_OVER;
+
+      }
       g_queryInfo.specifiedQueryInfo.queryTimes = specifiedQueryTimes->valueint;
     } else if (!specifiedQueryTimes) {
       g_queryInfo.specifiedQueryInfo.queryTimes = g_args.query_times;
@@ -4039,13 +4104,14 @@ static bool getMetaFromQueryJsonFile(cJSON* root) {
 
     cJSON* concurrent = cJSON_GetObjectItem(specifiedQuery, "concurrent");
     if (concurrent && concurrent->type == cJSON_Number) {
-      g_queryInfo.specifiedQueryInfo.concurrent = concurrent->valueint;
-      if (g_queryInfo.specifiedQueryInfo.concurrent <= 0) {
-        errorPrint("%s() LN%d, query sqlCount %"PRId64" or concurrent %"PRId64" is not correct.\n",
-              __func__, __LINE__, g_queryInfo.specifiedQueryInfo.sqlCount,
+      if (concurrent->valueint <= 0) {
+        errorPrint("%s() LN%d, query sqlCount %"PRIu64" or concurrent %"PRIu64" is not correct.\n",
+              __func__, __LINE__,
+              g_queryInfo.specifiedQueryInfo.sqlCount,
               g_queryInfo.specifiedQueryInfo.concurrent);
         goto PARSE_OVER;
       }
+      g_queryInfo.specifiedQueryInfo.concurrent = concurrent->valueint;
     } else if (!concurrent) {
       g_queryInfo.specifiedQueryInfo.concurrent = 1;
     }
@@ -4149,7 +4215,7 @@ static bool getMetaFromQueryJsonFile(cJSON* root) {
   // sub_table_query
   cJSON *superQuery = cJSON_GetObjectItem(root, "super_table_query");
   if (!superQuery) {
-    g_queryInfo.superQueryInfo.threadCnt = 0;
+    g_queryInfo.superQueryInfo.threadCnt = 1;
     g_queryInfo.superQueryInfo.sqlCount = 0;
   } else if (superQuery->type != cJSON_Object) {
     printf("ERROR: failed to read json, sub_table_query not found\n");
@@ -4165,6 +4231,11 @@ static bool getMetaFromQueryJsonFile(cJSON* root) {
 
     cJSON* superQueryTimes = cJSON_GetObjectItem(superQuery, "query_times");
     if (superQueryTimes && superQueryTimes->type == cJSON_Number) {
+      if (superQueryTimes->valueint < 0) {
+        errorPrint("%s() LN%d, failed to read json, query_times input mistake\n",
+          __func__, __LINE__);
+        goto PARSE_OVER;
+      }
       g_queryInfo.superQueryInfo.queryTimes = superQueryTimes->valueint;
     } else if (!superQueryTimes) {
       g_queryInfo.superQueryInfo.queryTimes = g_args.query_times;
@@ -4176,6 +4247,12 @@ static bool getMetaFromQueryJsonFile(cJSON* root) {
 
     cJSON* threads = cJSON_GetObjectItem(superQuery, "threads");
     if (threads && threads->type == cJSON_Number) {
+      if (threads->valueint <= 0) {
+        errorPrint("%s() LN%d, failed to read json, threads input mistake\n",
+          __func__, __LINE__);
+        goto PARSE_OVER;
+
+      }
       g_queryInfo.superQueryInfo.threadCnt = threads->valueint;
     } else if (!threads) {
       g_queryInfo.superQueryInfo.threadCnt = 1;
@@ -4215,10 +4292,15 @@ static bool getMetaFromQueryJsonFile(cJSON* root) {
       g_queryInfo.superQueryInfo.mode = SYNC_QUERY_MODE;
     }
 
-    cJSON* subinterval = cJSON_GetObjectItem(superQuery, "interval");
-    if (subinterval && subinterval->type == cJSON_Number) {
-      g_queryInfo.superQueryInfo.subscribeInterval = subinterval->valueint;
-    } else if (!subinterval) {
+    cJSON* superInterval = cJSON_GetObjectItem(superQuery, "interval");
+    if (superInterval && superInterval->type == cJSON_Number) {
+      if (superInterval->valueint < 0) {
+        errorPrint("%s() LN%d, failed to read json, interval input mistake\n",
+            __func__, __LINE__);
+        goto PARSE_OVER;
+      }
+      g_queryInfo.superQueryInfo.subscribeInterval = superInterval->valueint;
+    } else if (!superInterval) {
       //printf("failed to read json, subscribe interval no found\n");
       //goto PARSE_OVER;
       g_queryInfo.superQueryInfo.subscribeInterval = 10000;
@@ -4438,11 +4520,11 @@ static int64_t generateRowData(char* recBuf, int64_t timestamp, SSuperTable* stb
   char  *pstr = recBuf;
   int64_t maxLen = MAX_DATA_SIZE;
 
-  dataLen += snprintf(pstr + dataLen, maxLen - dataLen, "(%" PRId64 ", ", timestamp);
+  dataLen += snprintf(pstr + dataLen, maxLen - dataLen, "(%" PRId64 ",", timestamp);
 
   for (int i = 0; i < stbInfo->columnCount; i++) {
-    if ((0 == strncasecmp(stbInfo->columns[i].dataType, "binary", 6))
-            || (0 == strncasecmp(stbInfo->columns[i].dataType, "nchar", 5))) {
+    if ((0 == strncasecmp(stbInfo->columns[i].dataType, "BINARY", strlen("BINARY")))
+            || (0 == strncasecmp(stbInfo->columns[i].dataType, "NCHAR", strlen("NCHAR")))) {
       if (stbInfo->columns[i].dataLen > TSDB_MAX_BINARY_LEN) {
         errorPrint( "binary or nchar length overflow, max size:%u\n",
                 (uint32_t)TSDB_MAX_BINARY_LEN);
@@ -4455,47 +4537,47 @@ static int64_t generateRowData(char* recBuf, int64_t timestamp, SSuperTable* stb
         return -1;
       }
       rand_string(buf, stbInfo->columns[i].dataLen);
-      dataLen += snprintf(pstr + dataLen, maxLen - dataLen, "\'%s\', ", buf);
+      dataLen += snprintf(pstr + dataLen, maxLen - dataLen, "\'%s\',", buf);
       tmfree(buf);
     } else if (0 == strncasecmp(stbInfo->columns[i].dataType,
-                "int", 3)) {
+                "INT", 3)) {
       dataLen += snprintf(pstr + dataLen, maxLen - dataLen,
-              "%d, ", rand_int());
+              "%d,", rand_int());
     } else if (0 == strncasecmp(stbInfo->columns[i].dataType,
-                "bigint", 6)) {
+                "BIGINT", 6)) {
       dataLen += snprintf(pstr + dataLen, maxLen - dataLen,
-              "%"PRId64", ", rand_bigint());
+              "%"PRId64",", rand_bigint());
     }  else if (0 == strncasecmp(stbInfo->columns[i].dataType,
-                "float", 5)) {
+                "FLOAT", 5)) {
       dataLen += snprintf(pstr + dataLen, maxLen - dataLen,
-              "%f, ", rand_float());
+              "%f,", rand_float());
     }  else if (0 == strncasecmp(stbInfo->columns[i].dataType,
-                "double", 6)) {
+                "DOUBLE", 6)) {
       dataLen += snprintf(pstr + dataLen, maxLen - dataLen,
-              "%f, ", rand_double());
+              "%f,", rand_double());
     }  else if (0 == strncasecmp(stbInfo->columns[i].dataType,
-                "smallint", 8)) {
+                "SMALLINT", 8)) {
       dataLen += snprintf(pstr + dataLen, maxLen - dataLen,
-          "%d, ", rand_smallint());
+          "%d,", rand_smallint());
     }  else if (0 == strncasecmp(stbInfo->columns[i].dataType,
-          "tinyint", strlen("tinyint"))) {
+          "TINYINT", strlen("TINYINT"))) {
       dataLen += snprintf(pstr + dataLen, maxLen - dataLen,
-          "%d, ", rand_tinyint());
+          "%d,", rand_tinyint());
     }  else if (0 == strncasecmp(stbInfo->columns[i].dataType,
-          "bool", strlen("bool"))) {
+          "BOOL", strlen("BOOL"))) {
       dataLen += snprintf(pstr + dataLen, maxLen - dataLen,
-          "%d, ", rand_bool());
+          "%d,", rand_bool());
     }  else if (0 == strncasecmp(stbInfo->columns[i].dataType,
-          "timestamp", strlen("timestamp"))) {
+          "TIMESTAMP", strlen("TIMESTAMP"))) {
       dataLen += snprintf(pstr + dataLen, maxLen - dataLen,
-          "%"PRId64", ", rand_bigint());
+          "%"PRId64",", rand_bigint());
     }  else {
       errorPrint( "No support data type: %s\n", stbInfo->columns[i].dataType);
       return -1;
     }
   }
 
-  dataLen -= 2;
+  dataLen -= 1;
   dataLen += snprintf(pstr + dataLen, maxLen - dataLen, ")");
 
   verbosePrint("%s() LN%d, recBuf:\n\t%s\n", __func__, __LINE__, recBuf);
@@ -4522,31 +4604,31 @@ static int64_t generateData(char *recBuf, char **data_type,
   }
 
   for (int i = 0; i < c; i++) {
-    if (strcasecmp(data_type[i % c], "tinyint") == 0) {
-      pstr += sprintf(pstr, ", %d", rand_tinyint() );
-    } else if (strcasecmp(data_type[i % c], "smallint") == 0) {
-      pstr += sprintf(pstr, ", %d", rand_smallint());
-    } else if (strcasecmp(data_type[i % c], "int") == 0) {
-      pstr += sprintf(pstr, ", %d", rand_int());
-    } else if (strcasecmp(data_type[i % c], "bigint") == 0) {
-      pstr += sprintf(pstr, ", %" PRId64, rand_bigint());
-    } else if (strcasecmp(data_type[i % c], "float") == 0) {
-      pstr += sprintf(pstr, ", %10.4f", rand_float());
-    } else if (strcasecmp(data_type[i % c], "double") == 0) {
+    if (strcasecmp(data_type[i % c], "TINYINT") == 0) {
+      pstr += sprintf(pstr, ",%d", rand_tinyint() );
+    } else if (strcasecmp(data_type[i % c], "SMALLINT") == 0) {
+      pstr += sprintf(pstr, ",%d", rand_smallint());
+    } else if (strcasecmp(data_type[i % c], "INT") == 0) {
+      pstr += sprintf(pstr, ",%d", rand_int());
+    } else if (strcasecmp(data_type[i % c], "BIGINT") == 0) {
+      pstr += sprintf(pstr, ",%" PRId64, rand_bigint());
+    } else if (strcasecmp(data_type[i % c], "FLOAT") == 0) {
+      pstr += sprintf(pstr, ",%10.4f", rand_float());
+    } else if (strcasecmp(data_type[i % c], "DOUBLE") == 0) {
       double t = rand_double();
-      pstr += sprintf(pstr, ", %20.8f", t);
-    } else if (strcasecmp(data_type[i % c], "bool") == 0) {
+      pstr += sprintf(pstr, ",%20.8f", t);
+    } else if (strcasecmp(data_type[i % c], "BOOL") == 0) {
       bool b = taosRandom() & 1;
-      pstr += sprintf(pstr, ", %s", b ? "true" : "false");
-    } else if (strcasecmp(data_type[i % c], "binary") == 0) {
+      pstr += sprintf(pstr, ",%s", b ? "true" : "false");
+    } else if (strcasecmp(data_type[i % c], "BINARY") == 0) {
       char *s = malloc(lenOfBinary);
       rand_string(s, lenOfBinary);
-      pstr += sprintf(pstr, ", \"%s\"", s);
+      pstr += sprintf(pstr, ",\"%s\"", s);
       free(s);
-    } else if (strcasecmp(data_type[i % c], "nchar") == 0) {
+    } else if (strcasecmp(data_type[i % c], "NCHAR") == 0) {
       char *s = malloc(lenOfBinary);
       rand_string(s, lenOfBinary);
-      pstr += sprintf(pstr, ", \"%s\"", s);
+      pstr += sprintf(pstr, ",\"%s\"", s);
       free(s);
     }
 
@@ -4569,7 +4651,7 @@ static int prepareSampleDataForSTable(SSuperTable *superTblInfo) {
   sampleDataBuf = calloc(
             superTblInfo->lenOfOneRow * MAX_SAMPLES_ONCE_FROM_FILE, 1);
   if (sampleDataBuf == NULL) {
-      errorPrint("%s() LN%d, Failed to calloc %"PRId64" Bytes, reason:%s\n",
+      errorPrint("%s() LN%d, Failed to calloc %"PRIu64" Bytes, reason:%s\n",
               __func__, __LINE__,
               superTblInfo->lenOfOneRow * MAX_SAMPLES_ONCE_FROM_FILE,
               strerror(errno));
@@ -4620,18 +4702,17 @@ static int64_t execInsert(threadInfo *pThreadInfo, char *buffer, int k)
   return affectedRows;
 }
 
-static void getTableName(char *pTblName, threadInfo* pThreadInfo, int64_t tableSeq)
+static void getTableName(char *pTblName, threadInfo* pThreadInfo, uint64_t tableSeq)
 {
   SSuperTable* superTblInfo = pThreadInfo->superTblInfo;
   if (superTblInfo) {
-    if ((superTblInfo->childTblOffset >= 0)
-            && (superTblInfo->childTblLimit > 0)) {
+    if (superTblInfo->childTblLimit > 0) {
         snprintf(pTblName, TSDB_TABLE_NAME_LEN, "%s",
             superTblInfo->childTblName +
             (tableSeq - superTblInfo->childTblOffset) * TSDB_TABLE_NAME_LEN);
     } else {
 
-        verbosePrint("[%d] %s() LN%d: from=%"PRId64" count=%"PRId64" seq=%"PRId64"\n",
+        verbosePrint("[%d] %s() LN%d: from=%"PRIu64" count=%"PRIu64" seq=%"PRIu64"\n",
                 pThreadInfo->threadID, __func__, __LINE__,
                 pThreadInfo->start_table_from,
                 pThreadInfo->ntables, tableSeq);
@@ -4639,31 +4720,31 @@ static void getTableName(char *pTblName, threadInfo* pThreadInfo, int64_t tableS
             superTblInfo->childTblName + tableSeq * TSDB_TABLE_NAME_LEN);
     }
   } else {
-    snprintf(pTblName, TSDB_TABLE_NAME_LEN, "%s%"PRId64"",
+    snprintf(pTblName, TSDB_TABLE_NAME_LEN, "%s%"PRIu64"",
         g_args.tb_prefix, tableSeq);
   }
 }
 
 static int64_t generateDataTail(
         SSuperTable* superTblInfo,
-        int64_t batch, char* buffer, int64_t remainderBufLen, int64_t insertRows,
+        uint64_t batch, char* buffer, int64_t remainderBufLen, int64_t insertRows,
         int64_t startFrom, int64_t startTime, int64_t *pSamplePos, int64_t *dataLen) {
-  int64_t len = 0;
-  int ncols_per_record = 1; // count first col ts
+  uint64_t len = 0;
+  uint32_t ncols_per_record = 1; // count first col ts
 
   char *pstr = buffer;
 
   if (superTblInfo == NULL) {
-    int datatypeSeq = 0;
+    uint32_t datatypeSeq = 0;
     while(g_args.datatype[datatypeSeq]) {
         datatypeSeq ++;
         ncols_per_record ++;
     }
   }
 
-  verbosePrint("%s() LN%d batch=%"PRId64"\n", __func__, __LINE__, batch);
+  verbosePrint("%s() LN%d batch=%"PRIu64"\n", __func__, __LINE__, batch);
 
-  int64_t k = 0;
+  uint64_t k = 0;
   for (k = 0; k < batch;) {
     char data[MAX_DATA_SIZE];
     memset(data, 0, MAX_DATA_SIZE);
@@ -4738,7 +4819,7 @@ static int64_t generateDataTail(
       remainderBufLen -= retLen;
     }
 
-    verbosePrint("%s() LN%d len=%"PRId64" k=%"PRId64" \nbuffer=%s\n",
+    verbosePrint("%s() LN%d len=%"PRIu64" k=%"PRIu64" \nbuffer=%s\n",
             __func__, __LINE__, len, k, buffer);
 
     startFrom ++;
@@ -4820,12 +4901,12 @@ static int generateSQLHead(char *tableName, int32_t tableSeq,
 }
 
 static int64_t generateInterlaceDataBuffer(
-        char *tableName, int64_t batchPerTbl, int64_t i, int64_t batchPerTblTimes,
-        int64_t tableSeq,
+        char *tableName, uint64_t batchPerTbl, uint64_t i, uint64_t batchPerTblTimes,
+        uint64_t tableSeq,
         threadInfo *pThreadInfo, char *buffer,
-        int64_t insertRows,
+        uint64_t insertRows,
         int64_t startTime,
-        int64_t *pRemainderBufLen)
+        uint64_t *pRemainderBufLen)
 {
   assert(buffer);
   char *pstr = buffer;
@@ -4838,7 +4919,7 @@ static int64_t generateInterlaceDataBuffer(
     return 0;
   }
   // generate data buffer
-  verbosePrint("[%d] %s() LN%d i=%"PRId64" buffer:\n%s\n",
+  verbosePrint("[%d] %s() LN%d i=%"PRIu64" buffer:\n%s\n",
             pThreadInfo->threadID, __func__, __LINE__, i, buffer);
 
   pstr += headLen;
@@ -4846,7 +4927,7 @@ static int64_t generateInterlaceDataBuffer(
 
   int64_t dataLen = 0;
 
-  verbosePrint("[%d] %s() LN%d i=%"PRId64" batchPerTblTimes=%"PRId64" batchPerTbl = %"PRId64"\n",
+  verbosePrint("[%d] %s() LN%d i=%"PRIu64" batchPerTblTimes=%"PRIu64" batchPerTbl = %"PRIu64"\n",
             pThreadInfo->threadID, __func__, __LINE__,
             i, batchPerTblTimes, batchPerTbl);
 
@@ -4868,7 +4949,7 @@ static int64_t generateInterlaceDataBuffer(
     pstr += dataLen;
     *pRemainderBufLen -= dataLen;
   } else {
-    debugPrint("%s() LN%d, generated data tail: %"PRId64", not equal batch per table: %"PRId64"\n",
+    debugPrint("%s() LN%d, generated data tail: %"PRIu64", not equal batch per table: %"PRIu64"\n",
             __func__, __LINE__, k, batchPerTbl);
     pstr -= headLen;
     pstr[0] = '\0';
@@ -4963,10 +5044,10 @@ static void* syncWriteInterlace(threadInfo *pThreadInfo) {
   // TODO: prompt tbl count multple interlace rows and batch
   //
 
-  int64_t maxSqlLen = superTblInfo?superTblInfo->maxSqlLen:g_args.max_sql_len;
+  uint64_t maxSqlLen = superTblInfo?superTblInfo->maxSqlLen:g_args.max_sql_len;
   char* buffer = calloc(maxSqlLen, 1);
   if (NULL == buffer) {
-    errorPrint( "%s() LN%d, Failed to alloc %"PRId64" Bytes, reason:%s\n",
+    errorPrint( "%s() LN%d, Failed to alloc %"PRIu64" Bytes, reason:%s\n",
               __func__, __LINE__, maxSqlLen, strerror(errno));
     return NULL;
   }
@@ -4978,18 +5059,18 @@ static void* syncWriteInterlace(threadInfo *pThreadInfo) {
 
   int64_t nTimeStampStep = superTblInfo?superTblInfo->timeStampStep:DEFAULT_TIMESTAMP_STEP;
 
-  int insert_interval =
+  uint64_t insert_interval =
       superTblInfo?superTblInfo->insertInterval:g_args.insert_interval;
-  int64_t st = 0;
-  int64_t et = 0xffffffff;
+  uint64_t st = 0;
+  uint64_t et = UINT64_MAX;
 
-  int64_t lastPrintTime = taosGetTimestampMs();
-  int64_t startTs = taosGetTimestampMs();
-  int64_t endTs;
+  uint64_t lastPrintTime = taosGetTimestampMs();
+  uint64_t startTs = taosGetTimestampMs();
+  uint64_t endTs;
 
-  int64_t tableSeq = pThreadInfo->start_table_from;
+  uint64_t tableSeq = pThreadInfo->start_table_from;
 
-  debugPrint("[%d] %s() LN%d: start_table_from=%"PRId64" ntables=%"PRId64" insertRows=%"PRId64"\n",
+  debugPrint("[%d] %s() LN%d: start_table_from=%"PRIu64" ntables=%"PRIu64" insertRows=%"PRIu64"\n",
           pThreadInfo->threadID, __func__, __LINE__, pThreadInfo->start_table_from,
           pThreadInfo->ntables, insertRows);
 
@@ -5021,7 +5102,7 @@ static void* syncWriteInterlace(threadInfo *pThreadInfo) {
     }
     // generate data
     memset(buffer, 0, maxSqlLen);
-    int64_t remainderBufLen = maxSqlLen;
+    uint64_t remainderBufLen = maxSqlLen;
 
     char *pstr = buffer;
 
@@ -5040,7 +5121,7 @@ static void* syncWriteInterlace(threadInfo *pThreadInfo) {
         return NULL;
       }
 
-      int64_t oldRemainderLen = remainderBufLen;
+      uint64_t oldRemainderLen = remainderBufLen;
       int64_t generated = generateInterlaceDataBuffer(
         tableName, batchPerTbl, i, batchPerTblTimes,
         tableSeq,
@@ -5521,15 +5602,15 @@ static void startMultiThreadInsertData(int threads, char* db_name,
   int startFrom;
 
   if (superTblInfo) {
-    int limit, offset;
+    int64_t limit;
+    uint64_t offset;
 
     if ((NULL != g_args.sqlFile) && (superTblInfo->childTblExists == TBL_NO_EXISTS) &&
             ((superTblInfo->childTblOffset != 0) || (superTblInfo->childTblLimit >= 0))) {
       printf("WARNING: offset and limit will not be used since the child tables not exists!\n");
     }
 
-    if ((superTblInfo->childTblExists == TBL_ALREADY_EXISTS)
-            && (superTblInfo->childTblOffset >= 0)) {
+    if (superTblInfo->childTblExists == TBL_ALREADY_EXISTS) {
       if ((superTblInfo->childTblLimit < 0)
           || ((superTblInfo->childTblOffset + superTblInfo->childTblLimit)
             > (superTblInfo->childTblCount))) {
@@ -5574,7 +5655,7 @@ static void startMultiThreadInsertData(int threads, char* db_name,
       exit(-1);
     }
 
-    int64_t childTblCount;
+    uint64_t childTblCount;
     getChildNameOfSuperTableWithLimitAndOffset(
         taos,
         db_name, superTblInfo->sTblName,
@@ -5613,7 +5694,7 @@ static void startMultiThreadInsertData(int threads, char* db_name,
     t_info->superTblInfo = superTblInfo;
 
     t_info->start_time = start_time;
-    t_info->minDelay = INT64_MAX;
+    t_info->minDelay = UINT64_MAX;
 
     if ((NULL == superTblInfo) ||
             (0 == strncasecmp(superTblInfo->insertMode, "taosc", 5))) {
@@ -5658,7 +5739,7 @@ static void startMultiThreadInsertData(int threads, char* db_name,
 
   int64_t totalDelay = 0;
   int64_t maxDelay = 0;
-  int64_t minDelay = INT64_MAX;
+  int64_t minDelay = UINT64_MAX;
   int64_t cntDelay = 1;
   double  avgDelay = 0;
 
@@ -5762,11 +5843,11 @@ static void *readTable(void *sarg) {
   printf("%d records:\n", totalData);
   fprintf(fp, "| QFunctions |    QRecords    |   QSpeed(R/s)   |  QLatency(ms) |\n");
 
-  for (int j = 0; j < n; j++) {
+  for (uint64_t j = 0; j < n; j++) {
     double totalT = 0;
-    int count = 0;
-    for (int i = 0; i < num_of_tables; i++) {
-      sprintf(command, "select %s from %s%d where ts>= %" PRId64,
+    uint64_t count = 0;
+    for (uint64_t i = 0; i < num_of_tables; i++) {
+      sprintf(command, "select %s from %s%"PRIu64" where ts>= %" PRIu64,
               aggreFunc[j], tb_prefix, i, sTime);
 
       double t = taosGetTimestampMs();
@@ -6002,8 +6083,8 @@ static void *specifiedTableQuery(void *sarg) {
   int queryTimes = g_queryInfo.specifiedQueryInfo.queryTimes;
 
   int totalQueried = 0;
-  int64_t  lastPrintTime = taosGetTimestampMs();
-  int64_t  startTs = taosGetTimestampMs();
+  uint64_t  lastPrintTime = taosGetTimestampMs();
+  uint64_t  startTs = taosGetTimestampMs();
 
   while(queryTimes --) {
     if (g_queryInfo.specifiedQueryInfo.queryInterval && (et - st) <
@@ -6049,10 +6130,10 @@ static void *specifiedTableQuery(void *sarg) {
 
     et = taosGetTimestampMs();
 
-    int64_t  currentPrintTime = taosGetTimestampMs();
-    int64_t  endTs = taosGetTimestampMs();
+    uint64_t  currentPrintTime = taosGetTimestampMs();
+    uint64_t  endTs = taosGetTimestampMs();
     if (currentPrintTime - lastPrintTime > 30*1000) {
-      debugPrint("%s() LN%d, endTs=%"PRId64"ms, startTs=%"PRId64"ms\n",
+      debugPrint("%s() LN%d, endTs=%"PRIu64"ms, startTs=%"PRIu64"ms\n",
           __func__, __LINE__, endTs, startTs);
       printf("thread[%d] has currently completed queries: %d, QPS: %10.6f\n",
                     pThreadInfo->threadID,
@@ -6149,7 +6230,7 @@ static void *superTableQuery(void *sarg) {
       }
     }
     et = taosGetTimestampMs();
-    printf("####thread[%"PRId64"] complete all sqls to allocate all sub-tables[%"PRId64" - %"PRId64"] once queries duration:%.4fs\n\n",
+    printf("####thread[%"PRId64"] complete all sqls to allocate all sub-tables[%"PRIu64" - %"PRIu64"] once queries duration:%.4fs\n\n",
             taosGetSelfPthreadId(),
             pThreadInfo->start_table_from,
             pThreadInfo->end_table_to,
@@ -6415,7 +6496,7 @@ static void *superSubscribe(void *sarg) {
       }
     }
     //et = taosGetTimestampMs();
-    //printf("========thread[%"PRId64"] complete all sqls to super table once queries duration:%.4fs\n", taosGetSelfPthreadId(), (double)(et - st)/1000.0);
+    //printf("========thread[%"PRIu64"] complete all sqls to super table once queries duration:%.4fs\n", taosGetSelfPthreadId(), (double)(et - st)/1000.0);
   } while(0);
 
   // start loop to consume result
@@ -6481,7 +6562,7 @@ static void *specifiedSubscribe(void *sarg) {
   do {
     //if (g_queryInfo.specifiedQueryInfo.queryInterval && (et - st) < g_queryInfo.specifiedQueryInfo.queryInterval) {
     //  taosMsleep(g_queryInfo.specifiedQueryInfo.queryInterval- (et - st)); // ms
-    //  //printf("========sleep duration:%"PRId64 "========inserted rows:%d, table range:%d - %d\n", (1000 - (et - st)), i, pThreadInfo->start_table_from, pThreadInfo->end_table_to);
+    //  //printf("========sleep duration:%"PRIu64 "========inserted rows:%d, table range:%d - %d\n", (1000 - (et - st)), i, pThreadInfo->start_table_from, pThreadInfo->end_table_to);
     //}
 
     //st = taosGetTimestampMs();
@@ -6501,7 +6582,7 @@ static void *specifiedSubscribe(void *sarg) {
       }
     }
     //et = taosGetTimestampMs();
-    //printf("========thread[%"PRId64"] complete all sqls to super table once queries duration:%.4fs\n", taosGetSelfPthreadId(), (double)(et - st)/1000.0);
+    //printf("========thread[%"PRIu64"] complete all sqls to super table once queries duration:%.4fs\n", taosGetSelfPthreadId(), (double)(et - st)/1000.0);
   } while(0);
 
   // start loop to consume result
@@ -6571,8 +6652,9 @@ static int subscribeTestProcess() {
   //==== create sub threads for query from super table
   if ((g_queryInfo.specifiedQueryInfo.sqlCount <= 0) ||
           (g_queryInfo.specifiedQueryInfo.concurrent <= 0)) {
-    errorPrint("%s() LN%d, query sqlCount %"PRId64" or concurrent %"PRId64" is not correct.\n",
-              __func__, __LINE__, g_queryInfo.specifiedQueryInfo.sqlCount,
+    errorPrint("%s() LN%d, query sqlCount %"PRIu64" or concurrent %"PRIu64" is not correct.\n",
+              __func__, __LINE__,
+              g_queryInfo.specifiedQueryInfo.sqlCount,
               g_queryInfo.specifiedQueryInfo.concurrent);
     exit(-1);
   }
diff --git a/src/kit/taosdump/taosdump.c b/src/kit/taosdump/taosdump.c
index 96a1cd16f8f724efbee8780a72bcfadea4121be1..f7cb3e93d1c5f45113b2f05b5f99b31a7feffc63 100644
--- a/src/kit/taosdump/taosdump.c
+++ b/src/kit/taosdump/taosdump.c
@@ -99,11 +99,13 @@ enum _describe_table_index {
   TSDB_MAX_DESCRIBE_METRIC
 };
 
+#define COL_NOTE_LEN    128
+
 typedef struct {
   char field[TSDB_COL_NAME_LEN + 1];
   char type[16];
   int length;
-  char note[128];
+  char note[COL_NOTE_LEN];
 } SColDes;
 
 typedef struct {
@@ -523,7 +525,7 @@ int main(int argc, char *argv[]) {
 
   /* Parse our arguments; every option seen by parse_opt will be
      reflected in arguments. */
-  if (argc > 1)
+  if (argc > 2)
     parse_args(argc, argv, &g_args);
 
   argp_parse(&argp, argc, argv, 0, 0, &g_args);
@@ -1188,16 +1190,16 @@ int taosGetTableDes(char* dbName, char *table, STableDef *tableDes, TAOS* taosCo
       case TSDB_DATA_TYPE_BINARY: {
         memset(tableDes->cols[i].note, 0, sizeof(tableDes->cols[i].note));
         tableDes->cols[i].note[0] = '\'';
-        char tbuf[COMMAND_SIZE];
-        converStringToReadable((char *)row[0], length[0], tbuf, COMMAND_SIZE);
+        char tbuf[COL_NOTE_LEN];
+        converStringToReadable((char *)row[0], length[0], tbuf, COL_NOTE_LEN);
         char* pstr = stpcpy(&(tableDes->cols[i].note[1]), tbuf);
         *(pstr++) = '\'';
         break;
       }
       case TSDB_DATA_TYPE_NCHAR: {
         memset(tableDes->cols[i].note, 0, sizeof(tableDes->cols[i].note));
-        char tbuf[COMMAND_SIZE];
-        convertNCharToReadable((char *)row[0], length[0], tbuf, COMMAND_SIZE);
+        char tbuf[COL_NOTE_LEN-2];    // need reserve 2 bytes for ' ' 
+        convertNCharToReadable((char *)row[0], length[0], tbuf, COL_NOTE_LEN);
         sprintf(tableDes->cols[i].note, "\'%s\'", tbuf);
         break;
       }
diff --git a/src/rpc/src/rpcMain.c b/src/rpc/src/rpcMain.c
index db3c72c2fc8a1a1c326c37974bfde0741f93004b..2ec508f050ea7cf916f8b1c1e6ff37d18fb96523 100644
--- a/src/rpc/src/rpcMain.c
+++ b/src/rpc/src/rpcMain.c
@@ -295,7 +295,7 @@ void *rpcOpen(const SRpcInit *pInit) {
       return NULL;
     }
   } else {
-    pRpc->pCache = rpcOpenConnCache(pRpc->sessions, rpcCloseConn, pRpc->tmrCtrl, pRpc->idleTime * 30); 
+    pRpc->pCache = rpcOpenConnCache(pRpc->sessions, rpcCloseConn, pRpc->tmrCtrl, pRpc->idleTime * 20); 
     if ( pRpc->pCache == NULL ) {
       tError("%s failed to init connection cache", pRpc->label);
       rpcClose(pRpc);
diff --git a/tests/pytest/crash_gen/valgrind_taos.supp b/tests/pytest/crash_gen/valgrind_taos.supp
index 5eb5403395f4956bd2c6332e58566ccfe4ccc56a..a00b2d830c2e4a3261fcb6fc9a1769b2b583799f 100644
--- a/tests/pytest/crash_gen/valgrind_taos.supp
+++ b/tests/pytest/crash_gen/valgrind_taos.supp
@@ -17332,3 +17332,168 @@
    fun:PyVectorcall_Call
    fun:_PyEval_EvalFrameDefault
 }
+{
+   <insert_a_suppression_name_here>
+   Memcheck:Leak
+   match-leak-kinds: definite
+   fun:malloc
+   fun:lib_build_and_cache_attr
+   fun:lib_getattr
+   fun:_PyEval_EvalFrameDefault
+   fun:_PyFunction_Vectorcall
+   fun:_PyEval_EvalFrameDefault
+   fun:_PyEval_EvalCodeWithName
+   fun:PyEval_EvalCode
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   fun:PyVectorcall_Call
+   fun:_PyEval_EvalFrameDefault
+}
+{
+   <insert_a_suppression_name_here>
+   Memcheck:Leak
+   match-leak-kinds: definite
+   fun:malloc
+   fun:lib_build_and_cache_attr
+   fun:lib_getattr
+   obj:/usr/bin/python3.8
+   fun:_PyEval_EvalFrameDefault
+   fun:_PyFunction_Vectorcall
+   fun:_PyEval_EvalFrameDefault
+   obj:/usr/bin/python3.8
+   fun:_PyEval_EvalFrameDefault
+   fun:PyEval_EvalCode
+   obj:/usr/bin/python3.8
+   fun:_PyEval_EvalFrameDefault
+   fun:_PyEval_EvalCodeWithName
+}
+{
+   <insert_a_suppression_name_here>
+   Memcheck:Leak
+   match-leak-kinds: definite
+   fun:malloc
+   fun:_my_Py_InitModule
+   fun:lib_getattr
+   fun:b_init_cffi_1_0_external_module
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   fun:PyObject_CallMethod
+   fun:_cffi_init
+   fun:PyInit__bcrypt
+   fun:_PyImport_LoadDynamicModuleWithSpec
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   fun:PyVectorcall_Call
+   fun:_PyEval_EvalFrameDefault
+}
+{
+   <insert_a_suppression_name_here>
+   Memcheck:Leak
+   match-leak-kinds: definite
+   fun:malloc
+   fun:_PyObject_GC_New
+   fun:lib_getattr
+   fun:ffi_internal_new
+   fun:b_init_cffi_1_0_external_module
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   fun:PyObject_CallMethod
+   fun:_cffi_init
+   fun:PyInit__bcrypt
+   fun:_PyImport_LoadDynamicModuleWithSpec
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   fun:PyVectorcall_Call
+}
+{
+   <insert_a_suppression_name_here>
+   Memcheck:Leak
+   match-leak-kinds: definite
+   fun:malloc
+   fun:lib_build_cpython_func.isra.87
+   fun:lib_build_and_cache_attr
+   fun:lib_getattr
+   obj:/usr/bin/python3.8
+   fun:_PyEval_EvalFrameDefault
+   fun:_PyFunction_Vectorcall
+   fun:_PyEval_EvalFrameDefault
+   obj:/usr/bin/python3.8
+   fun:_PyEval_EvalFrameDefault
+   obj:/usr/bin/python3.8
+   fun:_PyEval_EvalFrameDefault
+}
+{
+   <insert_a_suppression_name_here>
+   Memcheck:Leak
+   match-leak-kinds: definite
+   fun:malloc
+   fun:lib_build_and_cache_attr
+   fun:lib_getattr
+   obj:/usr/bin/python3.8
+   fun:_PyEval_EvalFrameDefault
+   fun:_PyFunction_Vectorcall
+   fun:_PyEval_EvalFrameDefault
+   obj:/usr/bin/python3.8
+   fun:_PyEval_EvalFrameDefault
+   obj:/usr/bin/python3.8
+   fun:_PyEval_EvalFrameDefault
+   fun:_PyEval_EvalCodeWithName
+}
+{
+   <insert_a_suppression_name_here>
+   Memcheck:Leak
+   match-leak-kinds: definite
+   fun:malloc
+   fun:_my_Py_InitModule
+   fun:b_init_cffi_1_0_external_module
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   fun:PyObject_CallMethod
+   fun:_cffi_init
+   fun:PyInit__bcrypt
+   fun:_PyImport_LoadDynamicModuleWithSpec
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   fun:PyVectorcall_Call
+   fun:_PyEval_EvalFrameDefault
+}
+{
+   <insert_a_suppression_name_here>
+   Memcheck:Leak
+   match-leak-kinds: definite
+   fun:malloc
+   fun:_my_Py_InitModule
+   fun:b_init_cffi_1_0_external_module
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   fun:PyObject_CallMethod
+   fun:PyInit__openssl
+   fun:_PyImport_LoadDynamicModuleWithSpec
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   fun:PyVectorcall_Call
+   fun:_PyEval_EvalFrameDefault
+}
+{
+   <insert_a_suppression_name_here>
+   Memcheck:Leak
+   match-leak-kinds: definite
+   fun:malloc
+   fun:_PyObject_GC_New
+   fun:ffi_internal_new
+   fun:b_init_cffi_1_0_external_module
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   fun:PyObject_CallMethod
+   fun:_cffi_init
+   fun:PyInit__bcrypt
+   fun:_PyImport_LoadDynamicModuleWithSpec
+   obj:/usr/bin/python3.8
+   obj:/usr/bin/python3.8
+   fun:PyVectorcall_Call
+}
\ No newline at end of file
diff --git a/tests/pytest/fulltest.sh b/tests/pytest/fulltest.sh
index 3a6e0d5ba2e1a2504619cf060dbc7afa901d5218..54eef466289e1f052d0f22b9b74873051c9229c8 100755
--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -23,6 +23,7 @@ python3 ./test.py -f insert/insertIntoTwoTables.py
 python3 ./test.py -f insert/before_1970.py
 python3 bug2265.py
 python3 ./test.py -f insert/bug3654.py
+python3 ./test.py -f insert/insertDynamicColBeforeVal.py
 
 #table
 python3 ./test.py -f table/alter_wal0.py
diff --git a/tests/pytest/insert/insertDynamicColBeforeVal.py b/tests/pytest/insert/insertDynamicColBeforeVal.py
new file mode 100644
index 0000000000000000000000000000000000000000..4b596049d16a194b37b2e48e9c7dc521a20b3282
--- /dev/null
+++ b/tests/pytest/insert/insertDynamicColBeforeVal.py
@@ -0,0 +1,136 @@
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        tdSql.prepare()
+        tdSql.execute("drop database if exists db")
+        tdSql.execute("create database  if not exists db keep 3650")
+        tdSql.execute("use db")
+
+        tdLog.printNoPrefix("==========step1:create table")
+        tdSql.execute(
+            "create table stb1 (ts timestamp, c11 int, c12 float ) TAGS(t11 int, t12 int )"
+        )
+
+        tdLog.printNoPrefix("==========step2:insert data with new syntax")
+        tdSql.execute(
+            "insert into t1 using stb1(t11, t12) tags(11, 12) (ts, c11, c12) values (now, 10, 20)"
+        )
+
+        # case for tag-value
+        tdSql.execute(
+            "insert into t2 using stb1(t11) tags(21) (ts, c11, c12) values (now-1m, 11, 21)"
+        )
+        tdSql.execute(
+            "insert into t3 using stb1 tags(31, 32) (ts, c11, c12) values (now-2m, 12, 22)"
+        )
+        tdSql.error(
+            "insert into t4 using stb1(t11, t12)  (ts, c11, c12) values (now-3m, 13, 23)"
+        )
+        tdSql.error(
+            "insert into t5 using stb1(t11, t12) tags() (ts, c11, c12) values (now-4m, 14, 24)"
+        )
+        tdSql.error(
+            "insert into t6 using stb1(t11, t12) tags(41) (ts, c11, c12) values (now-5m, 15, 25)"
+        )
+        tdSql.error(
+            "insert into t7 using stb1(t12) tags(51, 52) (ts, c11, c12) values (now-6m, 16, 26)"
+        )
+        tdSql.execute(
+            "insert into t8 using stb1(t11, t12) tags('61', 62) (ts, c11, c12) values (now-7m, 17, 27)"
+        )
+
+
+        # case for col-value
+        tdSql.execute(
+            "insert into t9 using stb1(t11, t12) tags(71, 72) values (now-8m, 18, 28)"
+        )
+        tdSql.error(
+            "insert into t10 using stb1(t11, t12) tags(81, 82) (ts, c11, c12) values ()"
+        )
+        tdSql.error(
+            "insert into t11 using stb1(t11, t12) tags(91, 92) (ts, c11, c12) "
+        )
+        tdSql.error(
+            "insert into t12 using stb1(t11, t12) tags(101, 102) values (now-9m, 19)"
+        )
+        tdSql.error(
+            "insert into t13 using stb1(t11, t12) tags(111, 112) (ts, c11) values (now-10m, 110, 210)"
+        )
+        tdSql.error(
+            "insert into t14 using stb1(t11, t12) tags(121, 122) (ts, c11, c12) values (now-11m, 111)"
+        )
+        tdSql.execute(
+            "insert into t15 using stb1(t11, t12) tags(131, 132) (ts, c11, c12) values (now-12m, NULL , 212)"
+        )
+        tdSql.execute(
+            "insert into t16 using stb1(t11, t12) tags(141, 142) (ts, c11, c12) values (now-13m, 'NULL', 213)"
+        )
+        tdSql.error(
+            "insert into t17 using stb1(t11, t12) tags(151, 152) (ts, c11, c12) values (now-14m, Nan, 214)"
+        )
+        tdSql.error(
+            "insert into t18 using stb1(t11, t12) tags(161, 162) (ts, c11, c12) values (now-15m, 'NaN', 215)"
+        )
+        tdSql.execute(
+            "insert into t19 using stb1(t11, t12) tags(171, 172) (ts, c11) values (now-16m, 216)"
+        )
+        tdSql.error(
+            "insert into t20 using stb1(t11, t12) tags(181, 182) (c11, c12) values (117, 217)"
+        )
+
+        # multi-col_value
+        tdSql.execute(
+            "insert into t21 using stb1(t11, t12) tags(191, 192) (ts, c11, c12) values (now-17m, 118, 218)(now-18m, 119, 219)"
+        )
+        tdSql.execute(
+            "insert into t22 using stb1(t11, t12) tags(201, 202) values (now-19m, 120, 220)(now-19m, 121, 221)"
+        )
+        tdSql.error(
+            "insert into t23 using stb1(t11, t12) tags(211, 212) values (now-20m, 122, 222) (ts, c11, c12) values (now-21m, 123, 223)"
+        )
+        tdSql.error(
+            "insert into t24 using stb1(t11, t12) tags(221, 222) (ts, c11, c12) values (now-22m, 124, 224) (ts, c11, c12) values (now-23m, 125, 225)"
+        )
+        tdSql.execute(
+            "insert into t25 (ts, c11, c12) using stb1(t11, t12) tags(231, 232) values (now-24m, 126, 226)(now-25m, 127, 227)"
+        )
+        tdSql.error(
+            "insert into t26 (ts, c11, c12) values (now-24m, 128, 228)(now-25m, 129, 229) using stb1(t11, t12) tags(241, 242) "
+        )
+        tdSql.error(
+            "insert into t27 (ts, c11, c12) values (now-24m, 130, 230) using stb1(t11, t12) tags(251, 252) "
+        )
+
+        tdSql.query("show tables")
+        tdSql.checkRows(21)
+
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
\ No newline at end of file
diff --git a/tests/pytest/util/sql.py b/tests/pytest/util/sql.py
index ba9cb4d53d2ee733f4b087d7c4067e816cf8d112..8f62c5932b71049e97375ef6c57ecb563d204844 100644
--- a/tests/pytest/util/sql.py
+++ b/tests/pytest/util/sql.py
@@ -136,6 +136,11 @@ class TDSql:
     def checkData(self, row, col, data):
         self.checkRowCol(row, col) 
         if self.queryResult[row][col] != data:            
+            if self.cursor.istype(col, "TIMESTAMP") and self.queryResult[row][col] == datetime.datetime.fromisoformat(data):
+                tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
+                            (self.sql, row, col, self.queryResult[row][col], data))
+                return
+
             if str(self.queryResult[row][col]) == str(data):
                 tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
                             (self.sql, row, col, self.queryResult[row][col], data))