diff --git a/src/inc/sdb.h b/src/inc/sdb.h
index 389aecfb7b6a3ea047251d45d853b8f3e873021d..a0e0a1b2f2e8815f5425a65f6f793fad4b0bc847 100644
--- a/src/inc/sdb.h
+++ b/src/inc/sdb.h
@@ -105,7 +105,7 @@ extern SSdbPeer *sdbPeer[];
 
 #endif
 
-void *sdbOpenTable(int maxRows, int32_t maxRowSize, char *name, char keyType, char *directory,
+void *sdbOpenTable(int maxRows, int32_t maxRowSize, char *name, uint8_t keyType, char *directory,
                    void *(*appTool)(char, void *, char *, int, int *));
 
 void *sdbGetRow(void *handle, void *key);
diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index c1820a5b9c79ecad82bccd951e4bfb1a7c605768..d3634219aa69f3618e338fa2f4181b2d9019012c 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -664,7 +664,7 @@ typedef struct {
   uint32_t destId;
   char     meterId[TSDB_UNI_LEN];
   char     empty[3];
-  char     msgType;
+  uint8_t  msgType;
   int32_t  msgLen;
   uint8_t  content[0];
 } SIntMsg;
diff --git a/src/rpc/src/trpc.c b/src/rpc/src/trpc.c
index 9f006ab05a9612a1ca2f6f8e3e790156938bf423..4aa3e12cf1beb4789c6333885f2a02f266131efe 100755
--- a/src/rpc/src/trpc.c
+++ b/src/rpc/src/trpc.c
@@ -31,8 +31,6 @@
 #include "tutil.h"
 #include "lz4.h"
 
-#pragma GCC diagnostic ignored "-Wpointer-to-int-cast"
-
 typedef struct _msg_node {
   struct _msg_node *next;
   void *            ahandle;
@@ -58,7 +56,7 @@ typedef struct {
   uint16_t           tranId;         // outgoing transcation ID, for build message
   uint16_t           outTranId;      // outgoing transcation ID
   uint16_t           inTranId;
-  char               outType;
+  uint8_t            outType;
   char               inType;
   char               closing;
   char               rspReceived;
@@ -203,7 +201,7 @@ static STaosHeader* taosDecompressRpcMsg(STaosHeader* pHeader, SSchedMsg* pSched
   //tDump(pHeader->content, msgLen);
   
   if (buf) {
-    int32_t originalLen = LZ4_decompress_safe(pHeader->content + overhead, buf + sizeof(STaosHeader),
+    int32_t originalLen = LZ4_decompress_safe((const char*)(pHeader->content + overhead), buf + sizeof(STaosHeader),
         msgLen - overhead, contLen);
     
     memcpy(buf, pHeader, sizeof(STaosHeader));
@@ -220,6 +218,8 @@ static STaosHeader* taosDecompressRpcMsg(STaosHeader* pHeader, SSchedMsg* pSched
     tError("failed to allocate memory to decompress msg, contLen:%d, reason:%s", contLen, strerror(errno));
     pSchedMsg->msg = NULL;
   }
+
+  return NULL;
 }
 
 char *taosBuildReqHeader(void *param, char type, char *msg) {
@@ -245,7 +245,10 @@ char *taosBuildReqHeader(void *param, char type, char *msg) {
   pHeader->sourceId = pConn->ownId;
   pHeader->destId = pConn->peerId;
   pHeader->port = 0;
+
+#pragma GCC diagnostic ignored "-Wpointer-to-int-cast"
   pHeader->uid = (uint32_t)pConn + (uint32_t)getpid();
+#pragma GCC diagnostic warning "-Wpointer-to-int-cast"
 
   memcpy(pHeader->meterId, pConn->meterId, tListLen(pHeader->meterId));
 
@@ -276,7 +279,11 @@ char *taosBuildReqMsgWithSize(void *param, char type, int size) {
 
   pHeader->sourceId = pConn->ownId;
   pHeader->destId = pConn->peerId;
+
+#pragma GCC diagnostic ignored "-Wpointer-to-int-cast"
   pHeader->uid = (uint32_t)pConn + (uint32_t)getpid();
+#pragma GCC diagnostic warning "-Wpointer-to-int-cast"
+
   memcpy(pHeader->meterId, pConn->meterId, tListLen(pHeader->meterId));
 
   return (char *)pHeader->content;
diff --git a/src/sdb/inc/sdbint.h b/src/sdb/inc/sdbint.h
index 3327c1f7317cc6483346a7a7a7259b88a69ef6f7..c5b4f4e4aeccf6bd8664e067e7d74146e023b10b 100644
--- a/src/sdb/inc/sdbint.h
+++ b/src/sdb/inc/sdbint.h
@@ -127,7 +127,7 @@ typedef struct {
 } SMnodeStatus;
 
 typedef struct {
-  char     dbId;
+  uint8_t  dbId;
   char     type;
   uint64_t version;
   short    dataLen;
diff --git a/src/sdb/src/sdbEngine.c b/src/sdb/src/sdbEngine.c
index c115f3c3c0aa933211e14beeb5a11dd99fcade19..0efa81866f3b683b4027662a6b3d015e74d391ce 100644
--- a/src/sdb/src/sdbEngine.c
+++ b/src/sdb/src/sdbEngine.c
@@ -287,7 +287,7 @@ sdb_exit1:
   return -1;
 }
 
-void *sdbOpenTable(int maxRows, int32_t maxRowSize, char *name, char keyType, char *directory,
+void *sdbOpenTable(int maxRows, int32_t maxRowSize, char *name, uint8_t keyType, char *directory,
                    void *(*appTool)(char, void *, char *, int, int *)) {
   SSdbTable *pTable = (SSdbTable *)malloc(sizeof(SSdbTable));
   if (pTable == NULL) return NULL;