[TD-5134]<fix> fix runtime error

src/client/src/tscSQLParser.c

@@ -3363,9 +3363,16 @@ static int32_t doExtractColumnFilterInfo(SSqlCmd* pCmd, SQueryInfo* pQueryInfo,
   int32_t bufLen = 0;
   if (IS_NUMERIC_TYPE(pRight->value.nType)) {
     bufLen = 60;
+  } else {
+    /*
+     * make memory sanitizer happy;
+     */
+    if (pRight->value.nLen == 0) {
+      bufLen = pRight->value.nLen + 2; 
     } else {
       bufLen = pRight->value.nLen + 1; 
     }
+  }
 
   if (pExpr->tokenId == TK_LE || pExpr->tokenId == TK_LT) {
     retVal = tVariantDump(&pRight->value, (char*)&pColumnFilter->upperBndd, colType, false);