diff --git a/include/util/compare.h b/include/util/compare.h
index 461552ca7b..70a8134b35 100644
--- a/include/util/compare.h
+++ b/include/util/compare.h
@@ -13,8 +13,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef _TD_UTIL_COMPARE_H
-#define _TD_UTIL_COMPARE_H
+#ifndef _TD_UTIL_COMPARE_H_
+#define _TD_UTIL_COMPARE_H_
 
 #ifdef __cplusplus
 extern "C" {
@@ -35,67 +35,65 @@ extern "C" {
 #define FLT_GREATEREQUAL(_x, _y) (FLT_EQUAL((_x), (_y)) || ((_x) > (_y)))
 #define FLT_LESSEQUAL(_x, _y)    (FLT_EQUAL((_x), (_y)) || ((_x) < (_y)))
 
-#define PATTERN_COMPARE_INFO_INITIALIZER { '%', '_' }
+#define PATTERN_COMPARE_INFO_INITIALIZER \
+  { '%', '_' }
 
 typedef struct SPatternCompareInfo {
   char matchAll;  // symbol for match all wildcard, default: '%'
   char matchOne;  // symbol for match one wildcard, default: '_'
 } SPatternCompareInfo;
 
-int patternMatch(const char *pattern, const char *str, size_t size, const SPatternCompareInfo *pInfo);
+int32_t patternMatch(const char *pattern, const char *str, size_t size, const SPatternCompareInfo *pInfo);
 
-int WCSPatternMatch(const wchar_t *pattern, const wchar_t *str, size_t size, const SPatternCompareInfo *pInfo);
+int32_t WCSPatternMatch(const wchar_t *pattern, const wchar_t *str, size_t size, const SPatternCompareInfo *pInfo);
 
-
-int32_t taosArrayCompareString(const void* a, const void* b);
+int32_t taosArrayCompareString(const void *a, const void *b);
 
 int32_t setCompareBytes1(const void *pLeft, const void *pRight);
-
 int32_t setCompareBytes2(const void *pLeft, const void *pRight);
-
 int32_t setCompareBytes4(const void *pLeft, const void *pRight);
 int32_t setCompareBytes8(const void *pLeft, const void *pRight);
 
+int32_t compareInt8Val(const void *pLeft, const void *pRight);
+int32_t compareInt16Val(const void *pLeft, const void *pRight);
 int32_t compareInt32Val(const void *pLeft, const void *pRight);
 int32_t compareInt64Val(const void *pLeft, const void *pRight);
 
-int32_t compareInt16Val(const void *pLeft, const void *pRight);
-
-int32_t compareInt8Val(const void *pLeft, const void *pRight);
-
+int32_t compareUint8Val(const void *pLeft, const void *pRight);
+int32_t compareUint16Val(const void *pLeft, const void *pRight);
 int32_t compareUint32Val(const void *pLeft, const void *pRight);
 int32_t compareUint64Val(const void *pLeft, const void *pRight);
 
-int32_t compareUint16Val(const void *pLeft, const void *pRight);
-
-int32_t compareUint8Val(const void* pLeft, const void* pRight);
-
 int32_t compareFloatVal(const void *pLeft, const void *pRight);
-
 int32_t compareDoubleVal(const void *pLeft, const void *pRight);
 
 int32_t compareLenPrefixedStr(const void *pLeft, const void *pRight);
-
 int32_t compareLenPrefixedWStr(const void *pLeft, const void *pRight);
-int32_t compareStrRegexComp(const void* pLeft, const void* pRight);
-int32_t compareStrRegexCompMatch(const void* pLeft, const void* pRight);
-int32_t compareStrRegexCompNMatch(const void* pLeft, const void* pRight);
-int32_t compareFindItemInSet(const void *pLeft, const void* pRight);
+
+int32_t compareStrRegexComp(const void *pLeft, const void *pRight);
+int32_t compareStrRegexCompMatch(const void *pLeft, const void *pRight);
+int32_t compareStrRegexCompNMatch(const void *pLeft, const void *pRight);
+
+int32_t compareFindItemInSet(const void *pLeft, const void *pRight);
+
 int32_t compareInt8ValDesc(const void *pLeft, const void *pRight);
-int32_t compareInt16ValDesc(const void* pLeft, const void* pRight);
-int32_t compareInt32ValDesc(const void* pLeft, const void* pRight);
-int32_t compareInt64ValDesc(const void* pLeft, const void* pRight);
-int32_t compareFloatValDesc(const void* pLeft, const void* pRight);
-int32_t compareDoubleValDesc(const void* pLeft, const void* pRight);
-int32_t compareUint8ValDesc(const void* pLeft, const void* pRight);
-int32_t compareUint16ValDesc(const void* pLeft, const void* pRight);
-int32_t compareUint32ValDesc(const void* pLeft, const void* pRight);
-int32_t compareUint64ValDesc(const void* pLeft, const void* pRight);
-int32_t compareLenPrefixedStrDesc(const void* pLeft, const void* pRight);
-int32_t compareLenPrefixedWStrDesc(const void* pLeft, const void* pRight);
+int32_t compareInt16ValDesc(const void *pLeft, const void *pRight);
+int32_t compareInt32ValDesc(const void *pLeft, const void *pRight);
+int32_t compareInt64ValDesc(const void *pLeft, const void *pRight);
+
+int32_t compareFloatValDesc(const void *pLeft, const void *pRight);
+int32_t compareDoubleValDesc(const void *pLeft, const void *pRight);
+
+int32_t compareUint8ValDesc(const void *pLeft, const void *pRight);
+int32_t compareUint16ValDesc(const void *pLeft, const void *pRight);
+int32_t compareUint32ValDesc(const void *pLeft, const void *pRight);
+int32_t compareUint64ValDesc(const void *pLeft, const void *pRight);
+
+int32_t compareLenPrefixedStrDesc(const void *pLeft, const void *pRight);
+int32_t compareLenPrefixedWStrDesc(const void *pLeft, const void *pRight);
 
 #ifdef __cplusplus
 }
 #endif
 
-#endif  /*_TD_UTIL_COMPARE_H*/
+#endif /*_TD_UTIL_COMPARE_H_*/
diff --git a/source/util/src/compare.c b/source/util/src/compare.c
index f2d320fde0..a1c1625c34 100644
--- a/source/util/src/compare.c
+++ b/source/util/src/compare.c
@@ -16,13 +16,13 @@
 #define _GNU_SOURCE
 #define _XOPEN_SOURCE
 #define _DEFAULT_SOURCE
-
 #include "os.h"
-#include "types.h"
+
 #include "compare.h"
-#include "ulog.h"
-#include "thash.h"
 #include "regex.h"
+#include "thash.h"
+#include "types.h"
+#include "ulog.h"
 
 int32_t setCompareBytes1(const void *pLeft, const void *pRight) {
   return NULL != taosHashGet((SHashObj *)pRight, pLeft, 1) ? 1 : 0;
@@ -228,7 +228,7 @@ int32_t compareLenPrefixedWStrDesc(const void* pLeft, const void* pRight) {
  *      '_': Matches one character
  *
  */
-int patternMatch(const char *patterStr, const char *str, size_t size, const SPatternCompareInfo *pInfo) {
+int32_t patternMatch(const char *patterStr, const char *str, size_t size, const SPatternCompareInfo *pInfo) {
   char c, c1;
 
   int32_t i = 0;
@@ -289,7 +289,7 @@ int patternMatch(const char *patterStr, const char *str, size_t size, const SPat
   return (str[j] == 0 || j >= size) ? TSDB_PATTERN_MATCH : TSDB_PATTERN_NOMATCH;
 }
 
-int WCSPatternMatch(const wchar_t *patterStr, const wchar_t *str, size_t size, const SPatternCompareInfo *pInfo) {
+int32_t WCSPatternMatch(const wchar_t *patterStr, const wchar_t *str, size_t size, const SPatternCompareInfo *pInfo) {
   wchar_t c, c1;
   wchar_t matchOne = L'_';  // "_"
   wchar_t matchAll = L'%';  // "%"
@@ -360,11 +360,11 @@ int32_t compareStrRegexComp(const void* pLeft, const void* pRight) {
   memcpy(str, varDataVal(pLeft), sz);
   str[sz] = 0;
 
-  int errCode = 0;
+  int32_t errCode = 0;
   regex_t regex;
   char    msgbuf[256] = {0};
 
-  int cflags = REG_EXTENDED;
+  int32_t cflags = REG_EXTENDED;
   if ((errCode = regcomp(&regex, pattern, cflags)) != 0) {
     regerror(errCode, &regex, msgbuf, sizeof(msgbuf));
     uError("Failed to compile regex pattern %s. reason %s", pattern, msgbuf);
diff --git a/source/util/src/tskiplist.c b/source/util/src/tskiplist.c
index 00263d7bce..328d3da5a4 100644
--- a/source/util/src/tskiplist.c
+++ b/source/util/src/tskiplist.c
@@ -13,11 +13,13 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
-#include "tskiplist.h"
+
 #include "os.h"
+
 #include "compare.h"
-#include "ulog.h"
+#include "tskiplist.h"
 #include "tutil.h"
+#include "ulog.h"
 
 static int                initForwardBackwardPtr(SSkipList *pSkipList);
 static SSkipListNode *    getPriorNode(SSkipList *pSkipList, const char *val, int32_t order, SSkipListNode **pCur);
@@ -52,11 +54,17 @@ SSkipList *tSkipListCreate(uint8_t maxLevel, uint8_t keyType, uint16_t keyLen, _
   pSkipList->flags = flags;
   pSkipList->keyFn = fn;
   pSkipList->seed = rand();
+
+#if 0 
+  // the function getkeycomparfunc is defined in common
   if (comparFn == NULL) {
     pSkipList->comparFn = getKeyComparFunc(keyType, TSDB_ORDER_ASC);
   } else {
     pSkipList->comparFn = comparFn;
   }
+#else
+  pSkipList->comparFn = comparFn;
+#endif
 
   if (initForwardBackwardPtr(pSkipList) < 0) {
     tSkipListDestroy(pSkipList);
diff --git a/tests/test/c/create_table.c b/tests/test/c/create_table.c
index b8d8123380..74dd3f4535 100644
--- a/tests/test/c/create_table.c
+++ b/tests/test/c/create_table.c
@@ -182,7 +182,7 @@ void *threadFunc(void *param) {
     exit(1);
   }
 
-  pError("====before thread:%d, table range: %"PRId64 " - %"PRId64 "\n",
+  pPrint("====before thread:%d, table range: %"PRId64 " - %"PRId64 "\n",
 			  pInfo->threadIndex,
 			  pInfo->tableBeginIndex,
 			  pInfo->tableEndIndex);
@@ -190,7 +190,7 @@ void *threadFunc(void *param) {
   pInfo->tableBeginIndex += startOffset;
   pInfo->tableEndIndex   += startOffset;
 
-  pError("====after thread:%d, table range: %"PRId64 " - %"PRId64 "\n",
+  pPrint("====after thread:%d, table range: %"PRId64 " - %"PRId64 "\n",
 			  pInfo->threadIndex,
 			  pInfo->tableBeginIndex,
 			  pInfo->tableEndIndex);