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/* Copyright (C) 2005 MySQL AB
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#ifdef USE_PRAGMA_INTERFACE
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#pragma interface /* gcc class implementation */
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Shared structure for correct LOCK operation
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struct st_blackhole_share {
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uint table_name_length;
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Class definition for the blackhole storage engine
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"Dumbest named feature ever"
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class ha_blackhole: public handler
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THR_LOCK_DATA lock; /* MySQL lock */
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st_blackhole_share *share;
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ha_blackhole(handlerton *hton, TABLE_SHARE *table_arg);
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/* The name that will be used for display purposes */
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const char *table_type() const { return "BLACKHOLE"; }
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The name of the index type that will be used for display
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don't implement this method unless you really have indexes
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const char *index_type(uint key_number);
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const char **bas_ext() const;
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uint64_t table_flags() const
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return(HA_NULL_IN_KEY | HA_CAN_FULLTEXT | HA_CAN_SQL_HANDLER |
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HA_BINLOG_STMT_CAPABLE |
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HA_CAN_INDEX_BLOBS | HA_AUTO_PART_KEY |
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HA_FILE_BASED | HA_CAN_GEOMETRY | HA_CAN_INSERT_DELAYED);
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ulong index_flags(uint inx, uint part, bool all_parts) const
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return ((table_share->key_info[inx].algorithm == HA_KEY_ALG_FULLTEXT) ?
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0 : HA_READ_NEXT | HA_READ_PREV | HA_READ_RANGE |
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HA_READ_ORDER | HA_KEYREAD_ONLY);
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/* The following defines can be increased if necessary */
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#define BLACKHOLE_MAX_KEY 64 /* Max allowed keys */
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#define BLACKHOLE_MAX_KEY_SEG 16 /* Max segments for key */
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#define BLACKHOLE_MAX_KEY_LENGTH 1000
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uint max_supported_keys() const { return BLACKHOLE_MAX_KEY; }
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uint max_supported_key_length() const { return BLACKHOLE_MAX_KEY_LENGTH; }
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uint max_supported_key_part_length() const { return BLACKHOLE_MAX_KEY_LENGTH; }
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int open(const char *name, int mode, uint test_if_locked);
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int write_row(uchar * buf);
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int rnd_init(bool scan);
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int rnd_next(uchar *buf);
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int rnd_pos(uchar * buf, uchar *pos);
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int index_read_map(uchar * buf, const uchar * key, key_part_map keypart_map,
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enum ha_rkey_function find_flag);
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int index_read_idx_map(uchar * buf, uint idx, const uchar * key,
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key_part_map keypart_map,
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enum ha_rkey_function find_flag);
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int index_read_last_map(uchar * buf, const uchar * key, key_part_map keypart_map);
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int index_next(uchar * buf);
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int index_prev(uchar * buf);
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int index_first(uchar * buf);
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int index_last(uchar * buf);
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void position(const uchar *record);
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int external_lock(THD *thd, int lock_type);
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int create(const char *name, TABLE *table_arg,
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HA_CREATE_INFO *create_info);
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THR_LOCK_DATA **store_lock(THD *thd,
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enum thr_lock_type lock_type);