diff --git a/.gitignore b/.gitignore
index 77c52b2ee2d00da281cc6ddec32d4003c9b90c2b..c5d90eea5042bd069e69420c70d478ef9bd2e2a3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -66,3 +66,14 @@ CMakeError.log
 /test/cfg
 /src/.vs
 *.o
+src/connector/jdbc/.settings/
+tests/comparisonTest/cassandra/cassandratest/.classpath
+tests/comparisonTest/cassandra/cassandratest/.project
+tests/comparisonTest/cassandra/cassandratest/.settings/
+tests/comparisonTest/opentsdb/opentsdbtest/.classpath
+tests/comparisonTest/opentsdb/opentsdbtest/.factorypath
+tests/comparisonTest/opentsdb/opentsdbtest/.project
+tests/comparisonTest/opentsdb/opentsdbtest/.settings/
+tests/examples/JDBC/JDBCDemo/.classpath
+tests/examples/JDBC/JDBCDemo/.project
+tests/examples/JDBC/JDBCDemo/.settings/
diff --git a/packaging/deb/makedeb.sh b/packaging/deb/makedeb.sh
index 55fbd96d3f68b6157d70ac41ca4891d673104a7e..7bcb8562918925afa6e198181b1a9bfca55b09f5 100755
--- a/packaging/deb/makedeb.sh
+++ b/packaging/deb/makedeb.sh
@@ -47,7 +47,6 @@ cp ${compile_dir}/../packaging/cfg/taos.cfg         ${pkg_dir}${install_home_pat
 cp ${compile_dir}/../packaging/deb/taosd            ${pkg_dir}${install_home_path}/init.d
 cp ${compile_dir}/../packaging/tools/post.sh        ${pkg_dir}${install_home_path}/script
 cp ${compile_dir}/../packaging/tools/preun.sh       ${pkg_dir}${install_home_path}/script
-cp ${compile_dir}/build/bin/taosdump                ${pkg_dir}${install_home_path}/bin
 cp ${compile_dir}/build/bin/taosdemo                ${pkg_dir}${install_home_path}/bin
 cp ${compile_dir}/build/bin/taosd                   ${pkg_dir}${install_home_path}/bin
 cp ${compile_dir}/build/bin/taos                    ${pkg_dir}${install_home_path}/bin
diff --git a/packaging/rpm/tdengine.spec b/packaging/rpm/tdengine.spec
index ef02fb90fca722571271207cd21b22f0080f73bb..2fac159b041c7a7eff9a24520203e27d9083c2b5 100644
--- a/packaging/rpm/tdengine.spec
+++ b/packaging/rpm/tdengine.spec
@@ -58,7 +58,6 @@ cp %{_compiledir}/../packaging/tools/preun.sh       %{buildroot}%{homepath}/scri
 cp %{_compiledir}/build/bin/taos                    %{buildroot}%{homepath}/bin
 cp %{_compiledir}/build/bin/taosd                   %{buildroot}%{homepath}/bin
 cp %{_compiledir}/build/bin/taosdemo                %{buildroot}%{homepath}/bin
-cp %{_compiledir}/build/bin/taosdump                %{buildroot}%{homepath}/bin
 cp %{_compiledir}/build/lib/${libfile}              %{buildroot}%{homepath}/driver
 cp %{_compiledir}/../src/inc/taos.h                 %{buildroot}%{homepath}/include
 cp %{_compiledir}/../src/inc/taoserror.h            %{buildroot}%{homepath}/include
@@ -134,7 +133,6 @@ if [ $1 -eq 0 ];then
     ${csudo} rm -f ${bin_link_dir}/taos       || :
     ${csudo} rm -f ${bin_link_dir}/taosd      || :
     ${csudo} rm -f ${bin_link_dir}/taosdemo   || :
-    ${csudo} rm -f ${bin_link_dir}/taosdump   || :
     ${csudo} rm -f ${cfg_link_dir}/*          || :
     ${csudo} rm -f ${inc_link_dir}/taos.h     || :
     ${csudo} rm -f ${inc_link_dir}/taoserror.h     || :
diff --git a/packaging/tools/install.sh b/packaging/tools/install.sh
index ce5c052e97bfbd80e5b394254a64fe790a5f7ad0..0700ed46828674ac0eda71643c65f4b4b462f2cb 100644
--- a/packaging/tools/install.sh
+++ b/packaging/tools/install.sh
@@ -22,6 +22,7 @@ cfg_install_dir="/etc/taos"
 
 bin_link_dir="/usr/bin"
 lib_link_dir="/usr/lib"
+lib64_link_dir="/usr/lib64"
 inc_link_dir="/usr/include"
 
 #install main path
@@ -165,7 +166,6 @@ function install_bin() {
     ${csudo} rm -f ${bin_link_dir}/taos     || :
     ${csudo} rm -f ${bin_link_dir}/taosd    || :
     ${csudo} rm -f ${bin_link_dir}/taosdemo || :
-    ${csudo} rm -f ${bin_link_dir}/taosdump || :
     ${csudo} rm -f ${bin_link_dir}/rmtaos   || :
     ${csudo} rm -f ${bin_link_dir}/tarbitrator   || :
 
@@ -174,7 +174,6 @@ function install_bin() {
     #Make link
     [ -x ${install_main_dir}/bin/taos ] && ${csudo} ln -s ${install_main_dir}/bin/taos ${bin_link_dir}/taos                      || :
     [ -x ${install_main_dir}/bin/taosd ] && ${csudo} ln -s ${install_main_dir}/bin/taosd ${bin_link_dir}/taosd                   || :
-    [ -x ${install_main_dir}/bin/taosdump ] && ${csudo} ln -s ${install_main_dir}/bin/taosdump ${bin_link_dir}/taosdump          || :
     [ -x ${install_main_dir}/bin/taosdemo ] && ${csudo} ln -s ${install_main_dir}/bin/taosdemo ${bin_link_dir}/taosdemo          || :
     [ -x ${install_main_dir}/bin/remove.sh ] && ${csudo} ln -s ${install_main_dir}/bin/remove.sh ${bin_link_dir}/rmtaos          || :
     [ -x ${install_main_dir}/bin/tarbitrator ] && ${csudo} ln -s ${install_main_dir}/bin/tarbitrator ${bin_link_dir}/tarbitrator || :
@@ -189,6 +188,7 @@ function install_bin() {
 function install_lib() {
     # Remove links
     ${csudo} rm -f ${lib_link_dir}/libtaos.*         || :
+    ${csudo} rm -f ${lib64_link_dir}/libtaos.*       || :
     #${csudo} rm -rf ${v15_java_app_dir}              || :
 
     ${csudo} cp -rf ${script_dir}/driver/* ${install_main_dir}/driver && ${csudo} chmod 777 ${install_main_dir}/driver/*  
@@ -196,6 +196,9 @@ function install_lib() {
     ${csudo} ln -s ${install_main_dir}/driver/libtaos.* ${lib_link_dir}/libtaos.so.1
     ${csudo} ln -s ${lib_link_dir}/libtaos.so.1 ${lib_link_dir}/libtaos.so
     
+    ${csudo} ln -s ${install_main_dir}/driver/libtaos.* ${lib64_link_dir}/libtaos.so.1       || :
+    ${csudo} ln -s ${lib64_link_dir}/libtaos.so.1 ${lib64_link_dir}/libtaos.so               || :
+        
 	  #if [ "$verMode" == "cluster" ]; then
     #    # Compatible with version 1.5
     #    ${csudo} mkdir -p ${v15_java_app_dir}
diff --git a/packaging/tools/makepkg.sh b/packaging/tools/makepkg.sh
index 1cb412d9dd227d791cd904e247bf86237d59263b..1d65dd8069d1faf960d4b73100a162558b2ea7b8 100755
--- a/packaging/tools/makepkg.sh
+++ b/packaging/tools/makepkg.sh
@@ -36,7 +36,7 @@ if [ "$pagMode" == "lite" ]; then
   strip ${build_dir}/bin/taos
   bin_files="${build_dir}/bin/taosd ${build_dir}/bin/taos ${script_dir}/remove.sh"
 else 
-  bin_files="${build_dir}/bin/taosd ${build_dir}/bin/taos ${build_dir}/bin/taosdemo ${build_dir}/bin/taosdump ${build_dir}/bin/tarbitrator ${script_dir}/remove.sh"
+  bin_files="${build_dir}/bin/taosd ${build_dir}/bin/taos ${build_dir}/bin/taosdemo ${build_dir}/bin/tarbitrator ${script_dir}/remove.sh"
 fi
 
 lib_files="${build_dir}/lib/libtaos.so.${version}"
diff --git a/packaging/tools/post.sh b/packaging/tools/post.sh
index cffe06e30c116ae8a4faa01a0afd44c055322359..e9a742e63219e87dce4d8e82904f3c538403eb0d 100755
--- a/packaging/tools/post.sh
+++ b/packaging/tools/post.sh
@@ -21,6 +21,7 @@ inc_dir="/usr/local/taos/include"
 cfg_install_dir="/etc/taos"
 bin_link_dir="/usr/bin"
 lib_link_dir="/usr/lib"
+lib64_link_dir="/usr/lib64"
 inc_link_dir="/usr/include"
 
 service_config_dir="/etc/systemd/system"
@@ -74,16 +75,19 @@ function install_include() {
 
 function install_lib() {
     ${csudo} rm -f ${lib_link_dir}/libtaos* || :
+    ${csudo} rm -f ${lib64_link_dir}/libtaos* || :
     
     ${csudo} ln -s ${lib_dir}/libtaos.* ${lib_link_dir}/libtaos.so.1
     ${csudo} ln -s ${lib_link_dir}/libtaos.so.1 ${lib_link_dir}/libtaos.so
+    
+    ${csudo} ln -s ${lib_dir}/libtaos.* ${lib64_link_dir}/libtaos.so.1           || :
+    ${csudo} ln -s ${lib64_link_dir}/libtaos.so.1 ${lib64_link_dir}/libtaos.so   || :
 }
 
 function install_bin() {
     # Remove links
     ${csudo} rm -f ${bin_link_dir}/taos     || :
     ${csudo} rm -f ${bin_link_dir}/taosd    || :
-    ${csudo} rm -f ${bin_link_dir}/taosdump || :
     ${csudo} rm -f ${bin_link_dir}/taosdemo || :
     ${csudo} rm -f ${bin_link_dir}/rmtaos   || :
 
@@ -92,7 +96,6 @@ function install_bin() {
     #Make link
     [ -x ${bin_dir}/taos ] && ${csudo} ln -s ${bin_dir}/taos ${bin_link_dir}/taos             || :
     [ -x ${bin_dir}/taosd ] && ${csudo} ln -s ${bin_dir}/taosd ${bin_link_dir}/taosd          || :
-    [ -x ${bin_dir}/taosdump ] && ${csudo} ln -s ${bin_dir}/taosdump ${bin_link_dir}/taosdump || :
     [ -x ${bin_dir}/taosdemo ] && ${csudo} ln -s ${bin_dir}/taosdemo ${bin_link_dir}/taosdemo || :
 #   [ -x ${bin_dir}/remove.sh ] && ${csudo} ln -s ${bin_dir}/remove.sh ${bin_link_dir}/rmtaos || :
 }
diff --git a/src/connector/jdbc/deploy-pom.xml b/src/connector/jdbc/deploy-pom.xml
new file mode 100755
index 0000000000000000000000000000000000000000..b73bb010e06341cbfd473c7356e3cbe88d30139c
--- /dev/null
+++ b/src/connector/jdbc/deploy-pom.xml
@@ -0,0 +1,218 @@
+<!-- This xml is used for deploy taos-jdbcdriver to maven reprository, change name to pom.xml if you need to deploy new driver to maven reprository -->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>com.taosdata.jdbc</groupId>
+  <artifactId>taos-jdbcdriver</artifactId>
+  <version>2.0.0-SNAPSHOT</version>
+  <packaging>jar</packaging>
+
+
+  <name>JDBCDriver</name>
+  <url>https://github.com/taosdata/TDengine/tree/master/src/connector/jdbc</url>
+  <description>TDengine JDBC Driver</description>
+
+
+  <licenses>
+    <license>
+      <name>GNU AFFERO GENERAL PUBLIC LICENSE Version 3</name>
+      <url>https://github.com/taosdata/TDengine/blob/master/LICENSE</url>
+      <distribution>repo</distribution>
+    </license>
+  </licenses>
+
+  <scm>
+    <connection>scm:git:git://github.com/taosdata/TDengine.git</connection>
+    <developerConnection>scm:git:git@github.com:taosdata/TDengine.git</developerConnection>
+    <url>https://github.com/taosdata/TDengine/tree/master/src/connector/jdbc</url>
+    <tag>HEAD</tag>
+  </scm>
+
+  <developers>
+    <developer>
+      <name>taosdata</name>
+      <email>support@taosdata.com</email>
+      <organization>https://www.taosdata.com/</organization>
+      <organizationUrl>https://www.taosdata.com/</organizationUrl>
+    </developer>
+  </developers>
+
+
+  <dependencies>
+    <dependency>
+      <groupId>commons-logging</groupId>
+      <artifactId>commons-logging</artifactId>
+      <version>1.2</version>
+      <exclusions>
+        <exclusion>
+          <groupId>*</groupId>
+          <artifactId>*</artifactId>
+        </exclusion>
+      </exclusions>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-lang3</artifactId>
+      <version>3.5</version>
+    </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.13</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <version>3.0.0</version>
+        <configuration>
+          <descriptors>
+            <descriptor>src/main/assembly/assembly-jar.xml</descriptor>
+          </descriptors>
+        </configuration>
+        <executions>
+          <execution>
+            <id>make-assembly</id>
+            <phase>package</phase>
+            <goals>
+              <goal>single</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.6.1</version>
+        <configuration>
+          <encoding>UTF-8</encoding>
+          <source>11</source>
+          <target>11</target>
+          <debug>true</debug>
+          <showDeprecation>true</showDeprecation>
+        </configuration>
+      </plugin>
+
+
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-source-plugin</artifactId>
+        <version>3.2.1</version>
+        <executions>
+          <execution>
+            <id>attach-sources</id>
+            <goals>
+              <goal>jar</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-javadoc-plugin</artifactId>
+        <version>3.2.0</version>
+        <configuration>
+          <encoding>UTF-8</encoding>
+          <charset>UTF-8</charset>
+          <docencoding>UTF-8</docencoding>
+        </configuration>
+        <executions>
+          <execution>
+            <id>attach-javadocs</id>
+            <goals>
+              <goal>jar</goal>
+            </goals>
+            <configuration>
+              <doclint>none</doclint>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-gpg-plugin</artifactId>
+        <version>1.6</version>
+        <executions>
+          <execution>
+            <id>sign-artifacts</id>
+            <phase>verify</phase>
+            <goals>
+              <goal>sign</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-deploy-plugin</artifactId>
+        <version>2.8.2</version>
+        <executions>
+          <execution>
+            <id>default-deploy</id>
+            <phase>deploy</phase>
+            <goals>
+              <goal>deploy</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-plugin</artifactId>
+        <version>2.22.2</version>
+        <configuration>
+          <skipTests>true</skipTests>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.sonatype.plugins</groupId>
+        <artifactId>nexus-staging-maven-plugin</artifactId>
+        <version>1.6.7</version>
+        <extensions>true</extensions>
+        <configuration>
+          <serverId>ossrh-td</serverId>
+          <nexusUrl>https://oss.sonatype.org/</nexusUrl>
+          <autoReleaseAfterClose>true</autoReleaseAfterClose>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-release-plugin</artifactId>
+        <version>2.5.3</version>
+        <configuration>
+          <localCheckout>true</localCheckout>
+          <pushChanges>false</pushChanges>
+          <mavenExecutorId>forked-path</mavenExecutorId>
+          <arguments>-Dgpg.passphrase=${gpg.passphrase}</arguments>
+        </configuration>
+        <dependencies>
+          <dependency>
+            <groupId>org.apache.maven.scm</groupId>
+            <artifactId>maven-scm-provider-gitexe</artifactId>
+            <version>1.11.2</version>
+          </dependency>
+        </dependencies>
+      </plugin>
+
+    </plugins>
+  </build>
+
+  <distributionManagement>
+    <snapshotRepository>
+      <id>ossrh-td</id>
+      <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+    </snapshotRepository>
+    <repository>
+      <id>ossrh-td</id>
+      <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
+    </repository>
+  </distributionManagement>
+
+</project>
diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index 5837aed25908751e7925276ed87ba6af9291af29..ac7d44b1a6cb4294ae76788adf56fca1396b9ee9 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -1345,7 +1345,7 @@ int32_t mnodeRetrieveShowSuperTables(SShowObj *pShow, char *data, int32_t rows,
 
     pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
   
-    int16_t len = strnlen(stableName, TSDB_DB_NAME_LEN - 1);
+    int16_t len = strnlen(stableName, TSDB_TABLE_NAME_LEN - 1);
     *(int16_t*) pWrite = len;
     pWrite += sizeof(int16_t); // todo refactor
   
diff --git a/src/mnode/src/mnodeVgroup.c b/src/mnode/src/mnodeVgroup.c
index b3acf5d4d0836c3f7c422957cd15d3597e8dd199..bfeff1f4cbecdadc967854c1da58039749a481a0 100644
--- a/src/mnode/src/mnodeVgroup.c
+++ b/src/mnode/src/mnodeVgroup.c
@@ -309,7 +309,7 @@ void mnodeUpdateVgroupStatus(SVgObj *pVgroup, SDnodeObj *pDnode, SVnodeLoad *pVl
   for (int32_t i = 0; i < pVgroup->numOfVnodes; ++i) {
     SVnodeGid *pVgid = &pVgroup->vnodeGid[i];
     if (pVgid->pDnode == pDnode) {
-      mTrace("dnode:%d, receive status from dnode, vgId:%d status is %d", pVgroup->vgId, pDnode->dnodeId, pVgid->role);
+      mTrace("dnode:%d, receive status from dnode, vgId:%d status is %d", pDnode->dnodeId, pVgroup->vgId, pVgid->role);
       pVgid->role = pVload->role;
       if (pVload->role == TAOS_SYNC_ROLE_MASTER) {
         pVgroup->inUse = i;