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255 lines
7.1 KiB
255 lines
7.1 KiB
#ifndef SQL_SERVERS_INCLUDED
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#define SQL_SERVERS_INCLUDED
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/* Copyright (c) 2006, 2017, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#include <stddef.h>
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#include "lex_string.h"
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#include "my_sqlcommand.h"
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#include "sql/sql_cmd.h" // Sql_cmd
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class THD;
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struct MEM_ROOT;
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struct TABLE;
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class FOREIGN_SERVER {
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public:
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char *server_name;
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long port;
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size_t server_name_length;
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char *db, *scheme, *username, *password, *socket, *owner, *host, *sport;
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FOREIGN_SERVER()
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: server_name(NULL),
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port(-1),
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server_name_length(0),
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db(NULL),
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scheme(NULL),
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username(NULL),
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password(NULL),
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socket(NULL),
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owner(NULL),
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host(NULL),
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sport(NULL) {}
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};
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/* cache handlers */
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bool servers_init(bool dont_read_server_table);
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bool servers_reload(THD *thd);
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void servers_free(bool end = 0);
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/* lookup functions */
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FOREIGN_SERVER *get_server_by_name(MEM_ROOT *mem, const char *server_name,
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FOREIGN_SERVER *server_buffer);
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/**
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This class represent server options as set by the parser.
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*/
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class Server_options {
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public:
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static const long PORT_NOT_SET = -1;
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LEX_STRING m_server_name;
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private:
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long m_port;
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LEX_STRING m_host;
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LEX_STRING m_db;
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LEX_STRING m_username;
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LEX_STRING m_password;
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LEX_STRING m_scheme;
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LEX_STRING m_socket;
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LEX_STRING m_owner;
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public:
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void set_port(long port) { m_port = port; }
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void set_host(LEX_STRING host) { m_host = host; }
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void set_db(LEX_STRING db) { m_db = db; }
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void set_username(LEX_STRING username) { m_username = username; }
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void set_password(LEX_STRING password) { m_password = password; }
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void set_scheme(LEX_STRING scheme) { m_scheme = scheme; }
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void set_socket(LEX_STRING socket) { m_socket = socket; }
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void set_owner(LEX_STRING owner) { m_owner = owner; }
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long get_port() const { return m_port; }
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const char *get_host() const { return m_host.str; }
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const char *get_db() const { return m_db.str; }
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const char *get_username() const { return m_username.str; }
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const char *get_password() const { return m_password.str; }
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const char *get_scheme() const { return m_scheme.str; }
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const char *get_socket() const { return m_socket.str; }
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const char *get_owner() const { return m_owner.str; }
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/**
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Reset all strings to NULL and port to PORT_NOT_SET.
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This prepares the structure for being used by a new statement.
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*/
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void reset();
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/**
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Create a cache entry and insert it into the cache.
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@returns false if entry was created and inserted, true otherwise.
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*/
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bool insert_into_cache() const;
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/**
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Update a cache entry.
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@param existing Cache entry to update
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@returns false if the entry was updated, true otherwise.
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*/
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bool update_cache(FOREIGN_SERVER *existing) const;
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/**
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Create a record representing these server options,
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ready to be inserted into the mysql.servers table.
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@param table Table to be inserted into.
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*/
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void store_new_server(TABLE *table) const;
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/**
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Create a record for updating a row in the mysql.servers table.
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@param table Table to be updated.
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@param existing Cache entry represeting the existing values.
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*/
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void store_altered_server(TABLE *table, FOREIGN_SERVER *existing) const;
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};
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/**
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This class has common code for CREATE/ALTER/DROP SERVER statements.
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*/
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class Sql_cmd_common_server : public Sql_cmd {
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protected:
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TABLE *table;
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Sql_cmd_common_server() : table(NULL) {}
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virtual ~Sql_cmd_common_server() {}
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/**
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Check permissions and open the mysql.servers table.
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@param thd Thread context
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@returns false if success, true otherwise
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*/
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bool check_and_open_table(THD *thd);
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};
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/**
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This class implements the CREATE SERVER statement.
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*/
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class Sql_cmd_create_server : public Sql_cmd_common_server {
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/**
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Server_options::m_server_name contains the name of the
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server to create. The remaining Server_options fields
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contain options as set by the parser.
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Unset options are NULL (or PORT_NOT_SET for port).
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*/
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const Server_options *m_server_options;
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public:
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Sql_cmd_create_server(Server_options *server_options)
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: Sql_cmd_common_server(), m_server_options(server_options) {}
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enum_sql_command sql_command_code() const { return SQLCOM_CREATE_SERVER; }
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/**
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Create a new server by inserting a row into the
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mysql.server table and creating a cache entry.
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@param thd Thread context
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@returns false if success, true otherwise
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*/
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bool execute(THD *thd);
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};
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/**
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This class implements the ALTER SERVER statement.
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*/
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class Sql_cmd_alter_server : public Sql_cmd_common_server {
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/**
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Server_options::m_server_name contains the name of the
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server to change. The remaining Server_options fields
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contain changed options as set by the parser.
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Unchanged options are NULL (or PORT_NOT_SET for port).
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*/
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const Server_options *m_server_options;
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public:
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Sql_cmd_alter_server(Server_options *server_options)
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: Sql_cmd_common_server(), m_server_options(server_options) {}
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enum_sql_command sql_command_code() const { return SQLCOM_ALTER_SERVER; }
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/**
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Alter an existing server by updating the matching row in the
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mysql.servers table and updating the cache entry.
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@param thd Thread context
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@returns false if success, true otherwise
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*/
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bool execute(THD *thd);
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};
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/**
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This class implements the DROP SERVER statement.
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*/
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class Sql_cmd_drop_server : public Sql_cmd_common_server {
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/// Name of server to drop
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LEX_STRING m_server_name;
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/// Is this DROP IF EXISTS?
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bool m_if_exists;
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public:
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Sql_cmd_drop_server(LEX_STRING server_name, bool if_exists)
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: Sql_cmd_common_server(),
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m_server_name(server_name),
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m_if_exists(if_exists) {}
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enum_sql_command sql_command_code() const { return SQLCOM_DROP_SERVER; }
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/**
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Drop an existing server by deleting the matching row from the
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mysql.servers table and removing the cache entry.
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@param thd Thread context
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@returns false if success, true otherwise
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*/
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bool execute(THD *thd);
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};
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#endif /* SQL_SERVERS_INCLUDED */
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