89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
/* Copyright (c) 2009, 2019, Oracle and/or its affiliates. All rights reserved.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License, version 2.0,
|
|
as published by the Free Software Foundation.
|
|
|
|
This program is also distributed with certain software (including
|
|
but not limited to OpenSSL) that is licensed under separate terms,
|
|
as designated in a particular file or component or in included license
|
|
documentation. The authors of MySQL hereby grant you an additional
|
|
permission to link the program and your derivative works with the
|
|
separately licensed software that they have included with MySQL.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License, version 2.0, for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
|
|
|
|
#ifndef HA_NDBINFO_H
|
|
#define HA_NDBINFO_H
|
|
|
|
#include "sql/handler.h"
|
|
|
|
class ha_ndbinfo : public handler {
|
|
public:
|
|
ha_ndbinfo(handlerton *hton, TABLE_SHARE *table_arg);
|
|
~ha_ndbinfo() override;
|
|
|
|
const char *table_type() const override { return "NDBINFO"; }
|
|
ulonglong table_flags() const override {
|
|
return HA_NO_TRANSACTIONS | HA_NO_BLOBS | HA_NO_AUTO_INCREMENT;
|
|
}
|
|
ulong index_flags(uint, uint, bool) const override { return 0; }
|
|
|
|
int create(const char *name, TABLE *form, HA_CREATE_INFO *create_info,
|
|
dd::Table *table_def) override;
|
|
|
|
int open(const char *name, int mode, uint test_if_locked,
|
|
const dd::Table *table_def) override;
|
|
int close(void) override;
|
|
|
|
int rnd_init(bool scan) override;
|
|
int rnd_end() override;
|
|
int rnd_next(uchar *buf) override;
|
|
int rnd_pos(uchar *buf, uchar *pos) override;
|
|
void position(const uchar *record) override;
|
|
int info(uint) override;
|
|
|
|
THR_LOCK_DATA **store_lock(THD *, THR_LOCK_DATA **to,
|
|
enum thr_lock_type) override {
|
|
return to;
|
|
}
|
|
|
|
bool low_byte_first() const override {
|
|
// Data will be returned in machine format
|
|
#ifdef WORDS_BIGENDIAN
|
|
return false;
|
|
#else
|
|
return true;
|
|
#endif
|
|
}
|
|
|
|
bool get_error_message(int error, String *buf) override;
|
|
|
|
ha_rows estimate_rows_upper_bound() override {
|
|
// Estimate "many" rows to be returned so that filesort
|
|
// allocates buffers properly.
|
|
// Default impl. for this function is otherwise 10 rows
|
|
// in case handler hasn't filled in stats.records
|
|
return HA_POS_ERROR;
|
|
}
|
|
|
|
private:
|
|
void unpack_record(uchar *dst_row);
|
|
|
|
bool is_open(void) const;
|
|
bool is_closed(void) const { return !is_open(); }
|
|
|
|
bool is_offline(void) const;
|
|
|
|
struct ha_ndbinfo_impl &m_impl;
|
|
};
|
|
|
|
#endif
|