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44 lines
1.8 KiB
44 lines
1.8 KiB
#ifndef PFS_BATCH_MODE_INCLUDED
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#define PFS_BATCH_MODE_INCLUDED
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/* Copyright (c) 2018, 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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#include "sql/row_iterator.h"
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/// A RAII class to handle turning on batch mode in front of scanning a row
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/// iterator, and then turn it back off afterwards (on destruction).
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///
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/// Use this when scanning an iterator, e.g. using a for loop. See the comments
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/// on RowIterator::StartPSIBatchMode for more details.
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class PFSBatchMode {
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public:
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explicit PFSBatchMode(RowIterator *iterator) : m_iterator(iterator) {
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m_iterator->StartPSIBatchMode();
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}
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~PFSBatchMode() { m_iterator->EndPSIBatchModeIfStarted(); }
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private:
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RowIterator *m_iterator;
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};
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#endif /* PFS_BATCH_MODE_INCLUDED */
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