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a05a610d60
This was done to make it clear that a update_row() should not change the row. This was not done for handler::write_row() as this function still needs to update auto_increment values in the row. This should at some point be moved to handler::ha_write_row() after which write_row can also have const arguments.
113 lines
3 KiB
C++
113 lines
3 KiB
C++
/* Copyright (c) 2008, 2011, 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 as published by
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the Free Software Foundation; version 2 of the License.
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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 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 Foundation,
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51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
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#ifndef TABLE_THREADS_H
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#define TABLE_THREADS_H
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#include "pfs_column_types.h"
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#include "cursor_by_thread.h"
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struct PFS_thread;
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/**
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\addtogroup Performance_schema_tables
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@{
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*/
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/**
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A row of PERFORMANCE_SCHEMA.THREADS.
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*/
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struct row_threads
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{
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/** Column THREAD_ID. */
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ulonglong m_thread_internal_id;
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/** Column PROCESSLIST_ID. */
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ulonglong m_processlist_id;
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/** Column NAME. */
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const char* m_name;
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/** Length in bytes of @c m_name. */
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uint m_name_length;
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/** Column PROCESSLIST_USER. */
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char m_username[USERNAME_LENGTH];
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/** Length in bytes of @c m_username. */
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uint m_username_length;
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/** Column PROCESSLIST_HOST. */
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char m_hostname[HOSTNAME_LENGTH];
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/** Length in bytes of @c m_hostname. */
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uint m_hostname_length;
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/** Column PROCESSLIST_DB. */
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char m_dbname[NAME_LEN];
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/** Length in bytes of @c m_dbname. */
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uint m_dbname_length;
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/** Column PROCESSLIST_COMMAND. */
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int m_command;
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/** Column PROCESSLIST_TIME. */
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time_t m_start_time;
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/** Column PROCESSLIST_STATE. */
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const char* m_processlist_state_ptr;
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/** Length in bytes of @c m_processlist_state_ptr. */
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uint m_processlist_state_length;
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/** Column PROCESSLIST_INFO. */
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const char* m_processlist_info_ptr;
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/** Length in bytes of @c m_processlist_info_ptr. */
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uint m_processlist_info_length;
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/** Column INSTRUMENTED. */
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bool *m_enabled_ptr;
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/** Column PARENT_THREAD_ID. */
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ulonglong m_parent_thread_internal_id;
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};
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/** Table PERFORMANCE_SCHEMA.THREADS. */
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class table_threads : public cursor_by_thread
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{
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public:
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/** Table share */
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static PFS_engine_table_share m_share;
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/** Table builder */
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static PFS_engine_table* create();
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protected:
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virtual int read_row_values(TABLE *table,
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unsigned char *buf,
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Field **fields,
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bool read_all);
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virtual int update_row_values(TABLE *table,
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const unsigned char *old_buf,
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const unsigned char *new_buf,
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Field **fields);
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protected:
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table_threads();
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public:
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~table_threads()
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{}
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private:
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virtual void make_row(PFS_thread *pfs);
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/** Table share lock. */
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static THR_LOCK m_table_lock;
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/** Current row. */
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row_threads m_row;
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/** True if the current row exists. */
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bool m_row_exists;
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};
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/** @} */
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#endif
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