diff --git a/source/libs/command/src/command.c b/source/libs/command/src/command.c
index 8429e04a3e..27a43f7523 100644
--- a/source/libs/command/src/command.c
+++ b/source/libs/command/src/command.c
@@ -513,21 +513,18 @@ void appendColumnFields(char* buf, int32_t* len, STableCfg* pCfg) {
     int typeLen  = strlen(type);
     if (TSDB_DATA_TYPE_VARCHAR == pSchema->type || TSDB_DATA_TYPE_VARBINARY == pSchema->type ||
         TSDB_DATA_TYPE_GEOMETRY == pSchema->type) {
-      snprintf(type + typeLen, LTYPE_LEN - typeLen, "(%d)", (int32_t)(pSchema->bytes - VARSTR_HEADER_SIZE));
+      typeLen += tsnprintf(type + typeLen, LTYPE_LEN - typeLen, "(%d)", (int32_t)(pSchema->bytes - VARSTR_HEADER_SIZE));
     } else if (TSDB_DATA_TYPE_NCHAR == pSchema->type) {
-      snprintf(type + typeLen, LTYPE_LEN - typeLen, "(%d)",
+      typeLen += snprintf(type + typeLen, LTYPE_LEN - typeLen, "(%d)",
                (int32_t)((pSchema->bytes - VARSTR_HEADER_SIZE) / TSDB_NCHAR_SIZE));
     }
 
     if (useCompress(pCfg->tableType) && pCfg->pSchemaExt) {
-      typeLen = strlen(type);
-      snprintf(type + typeLen, LTYPE_LEN - typeLen, " ENCODE \'%s\'",
+      typeLen += tsnprintf(type + typeLen, LTYPE_LEN - typeLen, " ENCODE \'%s\'",
                columnEncodeStr(COMPRESS_L1_TYPE_U32(pCfg->pSchemaExt[i].compress)));
-      typeLen = strlen(type);
-      snprintf(type + typeLen, LTYPE_LEN - typeLen, " COMPRESS \'%s\'",
+      typeLen += tsnprintf(type + typeLen, LTYPE_LEN - typeLen, " COMPRESS \'%s\'",
                columnCompressStr(COMPRESS_L2_TYPE_U32(pCfg->pSchemaExt[i].compress)));
-      typeLen = strlen(type);
-      snprintf(type + typeLen, LTYPE_LEN - typeLen, " LEVEL \'%s\'",
+      typeLen += tsnprintf(type + typeLen, LTYPE_LEN - typeLen, " LEVEL \'%s\'",
                columnLevelStr(COMPRESS_L2_TYPE_LEVEL_U32(pCfg->pSchemaExt[i].compress)));
     }
     if (!(pSchema->flags & COL_IS_KEY)) {
diff --git a/source/libs/scheduler/src/schUtil.c b/source/libs/scheduler/src/schUtil.c
index e6945dac89..b68f665200 100644
--- a/source/libs/scheduler/src/schUtil.c
+++ b/source/libs/scheduler/src/schUtil.c
@@ -306,7 +306,7 @@ uint64_t schGenUUID(void) {
       qError("Failed to get the system uid, reason:%s", tstrerror(TAOS_SYSTEM_ERROR(errno)));
     }
   }
-ßßß
+
   int64_t  ts = taosGetTimestampMs();
   uint64_t pid = taosGetPId();
   int32_t  val = atomic_add_fetch_32(&requestSerialId, 1);
diff --git a/source/os/src/osString.c b/source/os/src/osString.c
index f2cadb3924..18da778227 100644
--- a/source/os/src/osString.c
+++ b/source/os/src/osString.c
@@ -712,16 +712,23 @@ int32_t taosAscii2Hex(const char *z, uint32_t n, void **data, uint32_t *size) {
 }
 
 int64_t tsnprintf(char *dst, int64_t size, const char *format, ...) {
-    if (size <= 0 || size > SIZE_MAX) return 0;
+  if (size <= 0) return 0;
+  if (size == 1) {
+    dst[0] = '\0';
+    return 0;
+  }
+  if (size > SIZE_MAX) {
+    size = SIZE_MAX;
+  }
 
-    int64_t ret;
-    va_list args;
-    va_start(args, format);
-    ret = vsnprintf(dst, size, format, args);
-    va_end(args );
-    if (ret >= size) {
-        return size - 1;
-    } else {
-        return ret;
-    }
+  int64_t ret;
+  va_list args;
+  va_start(args, format);
+  ret = vsnprintf(dst, size, format, args);
+  va_end(args);
+  if (ret >= size) {
+    return size - 1;
+  } else {
+    return ret;
+  }
 }