simple_select:
SELECT ... target_list...
{
...
n->targetList =$3;
...
}
修改为：
simple_select:
SELECT ... target_list...
{
...
n->targetList =$3;
...
if ( n->targetList->head->data.ptr_value == NULL)
fprintf(stderr,"ptr_value is NULL);
else
fprintf(stderr,"ptr_values is not NULL);
}
可以编译通过。运行中显示 "ptr_value is NULL"
本文转自健哥的数据花园博客园博客，原文链接：http://www.cnblogs.com/gaojian/archive/2012/09/10/2678671.html，如需转载请自行联系原作者
