95 lines
2.5 KiB
C++
95 lines
2.5 KiB
C++
/* Copyright (c) 2009, 2015, 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 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 St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef HA_NDBINFO_H
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#define HA_NDBINFO_H
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#include <handler.h>
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class ha_ndbinfo: public handler
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{
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public:
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ha_ndbinfo(handlerton *hton, TABLE_SHARE *table_arg);
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~ha_ndbinfo();
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const char *table_type() const { return "NDBINFO"; }
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const char **bas_ext() const {
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static const char *null[] = { NullS };
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return null;
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}
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ulonglong table_flags() const {
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return HA_REC_NOT_IN_SEQ | HA_NO_TRANSACTIONS |
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HA_NO_BLOBS | HA_NO_AUTO_INCREMENT;
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}
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ulong index_flags(uint inx, uint part, bool all_parts) const {
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return 0;
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}
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int create(const char *name, TABLE *form,
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HA_CREATE_INFO *create_info);
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int open(const char *name, int mode, uint test_if_locked);
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int close(void);
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int rnd_init(bool scan);
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int rnd_end();
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int rnd_next(uchar *buf);
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int rnd_pos(uchar *buf, uchar *pos);
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void position(const uchar *record);
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int info(uint);
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THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
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enum thr_lock_type lock_type) {
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return to;
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}
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bool low_byte_first() const {
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// Data will be returned in machine format
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#ifdef WORDS_BIGENDIAN
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return false;
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#else
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return true;
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#endif
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}
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bool get_error_message(int error, String *buf);
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uint8 table_cache_type() {
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// Don't put ndbinfo results in query cache
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return HA_CACHE_TBL_NOCACHE;
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}
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virtual ha_rows estimate_rows_upper_bound() {
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// Estimate "many" rows to be returned so that filesort
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// allocates buffers properly.
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// Default impl. for this function is otherwise 10 rows
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// in case handler hasn't filled in stats.records
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return HA_POS_ERROR;
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}
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private:
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void unpack_record(uchar *dst_row);
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bool is_open(void) const;
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bool is_closed(void) const { return ! is_open(); };
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bool is_offline(void) const;
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struct ha_ndbinfo_impl& m_impl;
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};
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#endif
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