54 lines
2.0 KiB
C++
54 lines
2.0 KiB
C++
/* Copyright (c) 2000, 2018, 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 <stddef.h>
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#include "my_inttypes.h"
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#include "my_thread_local.h"
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#include "storage/myisammrg/myrg_def.h"
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/* Read last row with the same key as the previous read. */
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int myrg_rlast(MYRG_INFO *info, uchar *buf, int inx) {
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MYRG_TABLE *table;
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MI_INFO *mi;
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int err;
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if (_myrg_init_queue(info, inx, HA_READ_KEY_OR_PREV)) return my_errno();
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for (table = info->open_tables; table < info->end_table; table++) {
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if ((err = mi_rlast(table->table, NULL, inx))) {
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if (err == HA_ERR_END_OF_FILE) continue;
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return err;
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}
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/* adding to queue */
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queue_insert(&(info->by_key), (uchar *)table);
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}
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/* We have done a read in all tables */
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info->last_used_table = table;
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if (!info->by_key.elements) return HA_ERR_END_OF_FILE;
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mi = (info->current_table = (MYRG_TABLE *)queue_top(&(info->by_key)))->table;
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return _myrg_mi_read_record(mi, buf);
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}
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