70 lines
2.6 KiB
C++
70 lines
2.6 KiB
C++
/* Copyright (c) 2000, 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 <sys/types.h>
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#include "my_dbug.h"
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#include "my_inttypes.h"
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#include "storage/myisam/myisamdef.h"
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/*
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** Find current row with read on position or read on key
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** If inx >= 0 find record using key
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** Return values:
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** 0 = Ok.
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** HA_ERR_KEY_NOT_FOUND = Row is deleted
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** HA_ERR_END_OF_FILE = End of file
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*/
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int mi_rsame(MI_INFO *info, uchar *record, int inx) {
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DBUG_TRACE;
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if (inx != -1 && !mi_is_key_active(info->s->state.key_map, inx)) {
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set_my_errno(HA_ERR_WRONG_INDEX);
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return HA_ERR_WRONG_INDEX;
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}
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if (info->lastpos == HA_OFFSET_ERROR || info->update & HA_STATE_DELETED) {
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set_my_errno(HA_ERR_KEY_NOT_FOUND);
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return HA_ERR_KEY_NOT_FOUND; /* No current record */
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}
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info->update &= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
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/* Read row from data file */
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if (fast_mi_readinfo(info)) return my_errno();
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if (inx >= 0) {
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info->lastinx = inx;
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info->lastkey_length =
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_mi_make_key(info, (uint)inx, info->lastkey, record, info->lastpos);
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if (info->s->concurrent_insert)
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mysql_rwlock_rdlock(&info->s->key_root_lock[inx]);
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(void)_mi_search(info, info->s->keyinfo + inx, info->lastkey, USE_WHOLE_KEY,
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SEARCH_SAME, info->s->state.key_root[inx]);
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if (info->s->concurrent_insert)
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mysql_rwlock_unlock(&info->s->key_root_lock[inx]);
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}
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if (!(*info->read_record)(info, info->lastpos, record)) return 0;
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if (my_errno() == HA_ERR_RECORD_DELETED) set_my_errno(HA_ERR_KEY_NOT_FOUND);
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return my_errno();
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} /* mi_rsame */
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