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86 lines
3.7 KiB
86 lines
3.7 KiB
5 months ago
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/* Copyright (c) 2015, 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 "m_ctype.h"
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#include "my_command.h"
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#include "mysql/service_command.h"
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#include "sql/srv_session.h"
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/**
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@file
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Command service implementation. For more information please check
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the function comments.
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*/
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/**
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Executes a server command in a session.
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There are two cases. Execution in a physical thread :
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1. initialized by the srv_session service
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2. NOT initialized by the srv_session service
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In case of 1, if there is currently attached session, and it is
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different from the passed one, the former will be automatically
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detached. The session to be used for the execution will then be
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attached. After the command is executed, the attached session will
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not be detached. It will be detached by a next call to run_command()
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with another session as parameter. In other words, for all sessions
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used in a physical thread, there will be at most one in attached
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state.
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In case of 2, the current state (current_thd) will be
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preserved. Then the given session will move to attached state and
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the command will be executed. After the execution the state of the
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session will be changed to detached and the preserved state
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(current_thd) will be restored.
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The client charset is used for commands like COM_QUERY and
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COM_STMT_PREPARE to know how to threat the char* fields. This
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charset will be used until the next call of run_command when it may
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be changed again.
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@param session The session
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@param command The command to be executed.
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@param data The data needed for the command to be executed
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@param client_cs The charset for the string data input(COM_QUERY for example)
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@param callbacks Callbacks to be used by the server to encode data and
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to communicate with the client (plugin) side.
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@param text_or_binary See enum cs_text_or_binary
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@param service_callbacks_ctx Context passed to the command service callbacks
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@return
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0 success
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1 failure
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*/
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int command_service_run_command(Srv_session *session,
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enum enum_server_command command,
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const union COM_DATA *data,
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const CHARSET_INFO *client_cs,
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const struct st_command_service_cbs *callbacks,
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enum cs_text_or_binary text_or_binary,
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void *service_callbacks_ctx) {
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if (!session || !Srv_session::is_valid(session)) return true;
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return session->execute_command(command, data, client_cs, callbacks,
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text_or_binary, service_callbacks_ctx);
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}
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