diff --git a/tests/examples/c/apitest.c b/tests/examples/c/apitest.c
index a482e2902e2ef635c9ec1b35e249806d17ba9fbb..f881b5b20cbfa4dd7b389bf0b2a81ae5a93a8b62 100644
--- a/tests/examples/c/apitest.c
+++ b/tests/examples/c/apitest.c
@@ -852,7 +852,6 @@ void verify_prepare3(TAOS* taos) {
   int         rows = 0;
   int         num_fields = taos_num_fields(result);
   TAOS_FIELD *fields = taos_fetch_fields(result);
-  char        temp[256] = {0};
 
   // fetch the records row by row
   while ((row = taos_fetch_row(result))) {