71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
/* Copyright (c) 2018, 2019, Alibaba 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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#ifndef SQL_INVENTORY_INVENTORY_HINT_INCLUDED
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#define SQL_INVENTORY_INVENTORY_HINT_INCLUDED
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#include "my_inttypes.h"
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#define IC_HINT_COMMIT (1U << 0)
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#define IC_HINT_ROLLBACK (1U << 1)
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#define IC_HINT_TARGET (1U << 2)
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class THD;
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class String;
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namespace im {
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class Inventory_hint {
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public:
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explicit Inventory_hint() : m_flags(0), m_target_rows(0) {}
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~Inventory_hint() {}
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void specify(ulonglong hint) { m_flags |= hint; }
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bool is_specified(ulonglong hint) { return hint & m_flags; }
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ulonglong get_target_rows() { return m_target_rows; }
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void set_target_rows(ulonglong value) { m_target_rows = value; }
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virtual void print(const THD *thd, String *str);
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private:
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ulonglong m_flags;
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ulonglong m_target_rows;
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};
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/**
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Precheck the inventory hint whether it's reasonable.
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*/
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extern bool disable_inventory_hint(THD *thd, Inventory_hint *hint);
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extern void process_inventory_target_hint(THD *thd, Inventory_hint *hint);
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extern void process_inventory_transactional_hint(THD *thd,
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Inventory_hint *hint);
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} /* namespace im */
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#endif
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