diff --git a/src/inc/sql.y b/src/inc/sql.y
index bf3c184a0f6e753e60a695c3f83744677be7bc08..b24902d678ad1cf4db7a645b3eeedc76a734c892 100755
--- a/src/inc/sql.y
+++ b/src/inc/sql.y
@@ -236,6 +236,7 @@ create_table_args(A) ::= AS select(S). {
 
 %type column{TAOS_FIELD}
 %type columnlist{tFieldList*}
+%destructor columnlist {tFieldListDestroy($$);}
 columnlist(A) ::= columnlist(X) COMMA column(Y).  {A = tFieldListAppend(X, &Y);   }
 columnlist(A) ::= column(X).                      {A = tFieldListAppend(NULL, &X);}
 
diff --git a/src/util/src/sql.c b/src/util/src/sql.c
index b402c85ca971c2f78b0a9509ed52d30f1ed6ad3d..8cf76d44ab3800a771dbd8a2f0667b954069f8db 100644
--- a/src/util/src/sql.c
+++ b/src/util/src/sql.c
@@ -1004,6 +1004,11 @@ static void yy_destructor(
     case 235: /* grouplist */
 {
 tVariantListDestroy((yypminor->yy216));
+}
+      break;
+    case 213: /* columnlist */
+{
+tFieldListDestroy((yypminor->yy151));
 }
       break;
     case 214: /* select */