83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
/* Copyright (c) 2008, 2019, 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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/**
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@file storage/perfschema/cursor_by_thread_connect_attr.cc
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Cursor on thread connect attributes.
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*/
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#include "storage/perfschema/cursor_by_thread_connect_attr.h"
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#include <stddef.h>
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#include "storage/perfschema/pfs_buffer_container.h"
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ha_rows cursor_by_thread_connect_attr::get_row_count(void) {
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/*
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The real number of attributes per thread does not matter,
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we only need to hint the optimizer there are many per thread,
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so abusing session_connect_attrs_size_per_thread
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(which is a number of bytes, not attributes)
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*/
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return global_thread_container.get_row_count() *
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session_connect_attrs_size_per_thread;
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}
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cursor_by_thread_connect_attr::cursor_by_thread_connect_attr(
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const PFS_engine_table_share *share)
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: PFS_engine_table(share, &m_pos) {}
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void cursor_by_thread_connect_attr::reset_position(void) {
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m_pos.reset();
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m_next_pos.reset();
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}
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int cursor_by_thread_connect_attr::rnd_next(void) {
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PFS_thread *thread;
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bool has_more_thread = true;
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for (m_pos.set_at(&m_next_pos); has_more_thread; m_pos.next_thread()) {
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thread = global_thread_container.get(m_pos.m_index_1, &has_more_thread);
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if (thread != NULL) {
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if (!make_row(thread, m_pos.m_index_2)) {
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m_next_pos.set_after(&m_pos);
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return 0;
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}
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}
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}
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return HA_ERR_END_OF_FILE;
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}
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int cursor_by_thread_connect_attr::rnd_pos(const void *pos) {
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PFS_thread *thread;
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set_position(pos);
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thread = global_thread_container.get(m_pos.m_index_1);
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if (thread != NULL) {
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return make_row(thread, m_pos.m_index_2);
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}
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return HA_ERR_RECORD_DELETED;
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}
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