Merge branch 'feature/os' of https://github.com/taosdata/TDengine into feature/os

src/inc/taosdef.h

@@ -194,9 +194,9 @@ static FORCE_INLINE bool isNull(const char *val, int32_t type) {
     case TSDB_DATA_TYPE_DOUBLE:
       return *(uint64_t *)val == TSDB_DATA_DOUBLE_NULL;
     case TSDB_DATA_TYPE_NCHAR:
-      return *(uint32_t*) varDataVal(val) == TSDB_DATA_NCHAR_NULL;
+      return varDataLen(val) == sizeof(int32_t) && *(uint32_t*) varDataVal(val) == TSDB_DATA_NCHAR_NULL;
     case TSDB_DATA_TYPE_BINARY:
-      return *(uint8_t *) varDataVal(val) == TSDB_DATA_BINARY_NULL;
+      return varDataLen(val) == sizeof(int8_t) && *(uint8_t *) varDataVal(val) == TSDB_DATA_BINARY_NULL;
     default:
       return false;
   };

src/tsdb/src/tsdbRead.c

@@ -2284,7 +2284,7 @@ void filterPrepare(void* expr, void* param) {
   if (pInfo->optr == TSDB_RELATION_IN) {
     pInfo->q = (char*) pCond->arr;
   } else {
-    pInfo->q = calloc(1, pSchema->bytes);
+    pInfo->q = calloc(1, pSchema->bytes + TSDB_NCHAR_SIZE);   // to make sure tonchar does not cause invalid write, since the '\0' needs at least sizeof(wchar_t) space.
     tVariantDump(pCond, pInfo->q, pSchema->type, true);
   }
 }