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47 lines
1.3 KiB
C
Executable file
47 lines
1.3 KiB
C
Executable file
#ifndef VTQ_INCLUDED
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#define VTQ_INCLUDED
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/* Copyright (c) 2016, MariaDB Corporation.
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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
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
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/**
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VTQ stands for 'versioning transaction query': InnoDB system table that holds
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transaction IDs, their corresponding times and other transaction-related
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data which is used for transaction order resolution. When versioned table
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marks its records lifetime with transaction IDs, VTQ is used to get their
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actual timestamps. */
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enum vtq_field_t
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{
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VTQ_ALL = 0,
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VTQ_TRX_ID,
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VTQ_COMMIT_ID,
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VTQ_BEGIN_TS,
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VTQ_COMMIT_TS,
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VTQ_ISO_LEVEL
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};
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struct vtq_record_t
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{
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ulonglong trx_id;
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ulonglong commit_id;
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timeval begin_ts;
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timeval commit_ts;
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uchar iso_level;
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};
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#endif /* VTQ_INCLUDED */
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