晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
| DIR:/usr/include/mysql/server/private/ |
| Current File : //usr/include/mysql/server/private/grant.h |
/*
Copyright (c) 2020, MariaDB Corporation.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
#ifndef SQL_GRANT_INCLUDED
#define SQL_GRANT_INCLUDED
#include "lex_string.h"
#include "privilege.h"
class LEX_COLUMN;
class Lex_ident_sys;
class Table_ident;
/*
Represents the object name in this standard SQL grammar:
GRANT <object privileges> ON <object name>
*/
class Grant_object_name
{
public:
enum Type
{
STAR, // ON *
IDENT_STAR, // ON db.*
STAR_STAR, // ON *.*
TABLE_IDENT // ON db.name
};
Lex_cstring m_db;
Table_ident *m_table_ident;
Type m_type;
public:
Grant_object_name(Table_ident *table_ident)
:m_table_ident(table_ident),
m_type(TABLE_IDENT)
{ }
Grant_object_name(const LEX_CSTRING &db, Type type)
:m_db(db),
m_table_ident(NULL),
m_type(type)
{ }
privilege_t all_privileges_by_type() const;
};
/*
Represents standard SQL statements described by:
- <grant privilege statement>
- <revoke privilege statement>
*/
class Grant_privilege
{
protected:
List<LEX_COLUMN> m_columns;
Lex_cstring m_db;
privilege_t m_object_privilege;
privilege_t m_column_privilege_total;
bool m_all_privileges;
public:
Grant_privilege()
:m_object_privilege(NO_ACL),
m_column_privilege_total(NO_ACL),
m_all_privileges(false)
{ }
Grant_privilege(privilege_t privilege, bool all_privileges)
:m_object_privilege(privilege),
m_column_privilege_total(NO_ACL),
m_all_privileges(all_privileges)
{ }
void add_object_privilege(privilege_t privilege)
{
m_object_privilege|= privilege;
}
bool add_column_privilege(THD *thd, const Lex_ident_sys &col,
privilege_t privilege);
bool add_column_list_privilege(THD *thd, List<Lex_ident_sys> &list,
privilege_t privilege);
bool set_object_name(THD *thd,
const Grant_object_name &ident,
SELECT_LEX *sel,
privilege_t with_grant_option);
const List<LEX_COLUMN> & columns() const { return m_columns; }
};
#endif // SQL_GRANT_INCLUDED
|