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062f8eb37d
the information about index algorithm was stored in two places inconsistently split between both. BTREE index could have key->algorithm == HA_KEY_ALG_BTREE, if the user explicitly specified USING BTREE or HA_KEY_ALG_UNDEF, if not. RTREE index had key->algorithm == HA_KEY_ALG_RTREE and always had key->flags & HA_SPATIAL FULLTEXT index had key->algorithm == HA_KEY_ALG_FULLTEXT and always had key->flags & HA_FULLTEXT HASH index had key->algorithm == HA_KEY_ALG_HASH or HA_KEY_ALG_UNDEF long unique index always had key->algorithm == HA_KEY_ALG_LONG_HASH In this commit: All indexes except BTREE and HASH always have key->algorithm set, HA_SPATIAL and HA_FULLTEXT flags are not used anymore (except for storage to keep frms backward compatible). As a side effect ALTER TABLE now detects FULLTEXT index renames correctly
100 lines
4 KiB
C++
100 lines
4 KiB
C++
/* Copyright (c) 2005, 2010, 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 02110-1335 USA */
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#include "thr_lock.h" /* THR_LOCK */
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#include "handler.h" /* handler */
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#include "table.h" /* TABLE_SHARE */
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#include "sql_const.h" /* MAX_KEY */
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/*
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Shared structure for correct LOCK operation
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*/
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struct st_blackhole_share {
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THR_LOCK lock;
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uint use_count;
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uint table_name_length;
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char table_name[1];
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};
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/*
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Class definition for the blackhole storage engine
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"Dumbest named feature ever"
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*/
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class ha_blackhole final : public handler
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{
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THR_LOCK_DATA lock; /* MySQL lock */
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st_blackhole_share *share;
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public:
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ha_blackhole(handlerton *hton, TABLE_SHARE *table_arg);
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~ha_blackhole() = default;
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/*
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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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*/
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ulonglong table_flags() const override
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{
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return(HA_NULL_IN_KEY | HA_CAN_FULLTEXT | HA_CAN_SQL_HANDLER |
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HA_BINLOG_STMT_CAPABLE | HA_BINLOG_ROW_CAPABLE |
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HA_CAN_INDEX_BLOBS | HA_AUTO_PART_KEY | HA_CAN_ONLINE_BACKUPS |
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HA_FILE_BASED | HA_CAN_GEOMETRY | HA_CAN_INSERT_DELAYED);
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}
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ulong index_flags(uint inx, uint part, bool all_parts) const override
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{
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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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}
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/* The following defines can be increased if necessary */
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#define BLACKHOLE_MAX_KEY MAX_KEY /* 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 3500 /* Like in InnoDB */
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uint max_supported_keys() const override { return BLACKHOLE_MAX_KEY; }
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uint max_supported_key_length() const override { return BLACKHOLE_MAX_KEY_LENGTH; }
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uint max_supported_key_part_length() const override { return BLACKHOLE_MAX_KEY_LENGTH; }
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int open(const char *name, int mode, uint test_if_locked) override;
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int close(void) override;
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int truncate() override;
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int rnd_init(bool scan) override;
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int rnd_next(uchar *buf) override;
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int rnd_pos(uchar * buf, uchar *pos) override;
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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) override;
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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) override;
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int index_read_last_map(uchar * buf, const uchar * key, key_part_map keypart_map) override;
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int index_next(uchar * buf) override;
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int index_prev(uchar * buf) override;
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int index_first(uchar * buf) override;
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int index_last(uchar * buf) override;
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void position(const uchar *record) override;
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int info(uint flag) override;
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int external_lock(THD *thd, int lock_type) override;
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int create(const char *name, TABLE *table_arg,
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HA_CREATE_INFO *create_info) override;
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THR_LOCK_DATA **store_lock(THD *thd,
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THR_LOCK_DATA **to,
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enum thr_lock_type lock_type) override;
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int delete_table(const char *name) override
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{
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return 0;
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}
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private:
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int write_row(const uchar *buf) override;
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int update_row(const uchar *old_data, const uchar *new_data) override;
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int delete_row(const uchar *buf) override;
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};
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