diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index da5bd7d3cc5bc752105e288bf5976fd5ed42a7f3..0bcddcf5f8d43c480d5b6caab594ede95786a7fe 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -431,6 +431,7 @@ int32_t handleUserDefinedFunc(SSqlObj* pSql, struct SSqlInfo* pInfo) {
   const char *msg2 = "path is too long";
   const char *msg3 = "invalid outputtype";
   const char *msg4 = "invalid script";
+  const char *msg5 = "invalid dyn lib";
   SSqlCmd *pCmd = &pSql->cmd;
 
   switch (pInfo->type) {
@@ -444,6 +445,10 @@ int32_t handleUserDefinedFunc(SSqlObj* pSql, struct SSqlInfo* pInfo) {
       }
 
       createInfo->name.z[createInfo->name.n] = 0;
+      // funcname's naming rule is same to column 
+      if (validateColumnName(createInfo->name.z) != TSDB_CODE_SUCCESS) {
+        return  invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg1);
+      }
 
       strdequote(createInfo->name.z);
 
@@ -463,10 +468,16 @@ int32_t handleUserDefinedFunc(SSqlObj* pSql, struct SSqlInfo* pInfo) {
       if (ret) {
         return ret;
       }
-      //distinguish  *.lua and *.so
+      //validate *.lua or .so
       int32_t pathLen = (int32_t)strlen(createInfo->path.z);
-      if ((pathLen > 3) && (0 == strncmp(createInfo->path.z + pathLen - 3, "lua", 3)) && !isValidScript(buf, len)) {
+      if ((pathLen > 4) && (0 == strncmp(createInfo->path.z + pathLen - 4, ".lua", 4)) && !isValidScript(buf, len)) {
         return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg4);
+      } else if (pathLen > 3 && (0 == strncmp(createInfo->path.z + pathLen - 3, ".so", 3))) {
+        void *handle = taosLoadDll(createInfo->path.z);
+        taosCloseDll(handle);
+        if (handle == NULL) {
+          return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg5);
+        }
       }
 
       //TODO CHECK CODE
diff --git a/src/kit/shell/src/shellEngine.c b/src/kit/shell/src/shellEngine.c
index 51a25d59c4550e955e37e6a67430a56a57a6d8bc..ef3a2458a07ba7ab3ad516566e1a38a32526146b 100644
--- a/src/kit/shell/src/shellEngine.c
+++ b/src/kit/shell/src/shellEngine.c
@@ -255,8 +255,12 @@ int32_t shellRunCommand(TAOS* con, char* command) {
     }
 
     if (c == '\\') {
-      esc = true;
-      continue;
+      if (quote != 0 && (*command == '_' || *command == '\\')) {
+        //DO nothing 
+      } else {
+        esc = true;
+        continue;
+      }
     }
 
     if (quote == c) {
diff --git a/src/util/src/tcompare.c b/src/util/src/tcompare.c
index 1b980a4a1dc864da142f8ccdeb4104b5d06fde46..47cc75131802fce5c72e7fdd3ae6675d34917a8c 100644
--- a/src/util/src/tcompare.c
+++ b/src/util/src/tcompare.c
@@ -262,6 +262,7 @@ int patternMatch(const char *patterStr, const char *str, size_t size, const SPat
     c1 = str[j++];
 
     if (j <= size) {
+      if (c == '\\' && patterStr[i] == '_' && c1 == '_') { i++; continue; }
       if (c == c1 || tolower(c) == tolower(c1) || (c == pInfo->matchOne && c1 != 0)) {
         continue;
       }
diff --git a/src/util/src/tsocket.c b/src/util/src/tsocket.c
index 77941cba82010a9187227b4740c4100680577403..8d69a87e77bff594e7a99b2a63d4d849214eebe9 100644
--- a/src/util/src/tsocket.c
+++ b/src/util/src/tsocket.c
@@ -488,7 +488,7 @@ SOCKET taosOpenTcpServerSocket(uint32_t ip, uint16_t port) {
     return -1;
   }
 
-  if (listen(sockFd, 10) < 0) {
+  if (listen(sockFd, 1024) < 0) {
     uError("listen tcp server socket failed, 0x%x:%hu(%s)", ip, port, strerror(errno));
     taosCloseSocket(sockFd);
     return -1;
diff --git a/src/util/src/tutil.c b/src/util/src/tutil.c
index f8a97ff7cd04ac6888806f69f53dbc0188aaa8cd..ae10dd265a5f94d2a2f3a30888b917b617dec84e 100644
--- a/src/util/src/tutil.c
+++ b/src/util/src/tutil.c
@@ -64,12 +64,15 @@ int32_t strRmquote(char *z, int32_t len){
     int32_t j = 0;
     for (uint32_t k = 1; k < len - 1; ++k) {
       if (z[k] == '\\' || (z[k] == delim && z[k + 1] == delim)) {
+        if (z[k] == '\\' && z[k + 1] == '_') {
+          //match '_' self
+        } else {
           z[j] = z[k + 1];
-  
-        cnt++;
-        j++;
-        k++;
-        continue;
+          cnt++;
+          j++;
+          k++;
+          continue;
+        }
       }
   
       z[j] = z[k];
diff --git a/tests/script/fullGeneralSuite.sim b/tests/script/fullGeneralSuite.sim
index 5b5a911558b5eb1d27f34fb10590a3b9ff52658c..9f46b078475806292239e49fcbec80f5957e4eb4 100644
--- a/tests/script/fullGeneralSuite.sim
+++ b/tests/script/fullGeneralSuite.sim
@@ -221,3 +221,4 @@ run general/stream/table_replica1_vnoden.sim
 run general/stream/metrics_replica1_vnoden.sim
 run general/db/show_create_db.sim
 run general/db/show_create_table.sim
+run general/parser/like.sim