fix bug #571

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);}
 

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 */