diff --git a/src/kit/taosdemo/taosdemo.c b/src/kit/taosdemo/taosdemo.c
index 1d77a6bb6395d7b171a3d79ee75df27ec1826f34..4d8c64d8b319072c857ac800fdc5672c3b05214c 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -908,6 +908,7 @@ int main(int argc, char *argv[]) {
     }
     pthread_join(read_id, NULL);
     taos_close(rInfo->taos);
+    free(rInfo);
   }
 
   taos_cleanup();
diff --git a/src/query/src/qParserImpl.c b/src/query/src/qParserImpl.c
index d0839b3dc4faf18535a1cef58315f5c420128cf1..2efd4f76ea3f3efbbc1c52df4de2e743b65908f3 100644
--- a/src/query/src/qParserImpl.c
+++ b/src/query/src/qParserImpl.c
@@ -279,7 +279,7 @@ tSQLExpr *tSqlExprCreate(tSQLExpr *pLeft, tSQLExpr *pRight, int32_t optrType) {
     pExpr->nSQLOptr = optrType;
     pExpr->pLeft = pLeft;
 
-    if (pRight == NULL) {
+    if (pLeft != NULL && pRight == NULL) {
       pRight = calloc(1, sizeof(tSQLExpr));
     }