diff options
Diffstat (limited to 'sql/ha_heap.h')
| -rw-r--r-- | sql/ha_heap.h | 53 |
1 files changed, 29 insertions, 24 deletions
diff --git a/sql/ha_heap.h b/sql/ha_heap.h index 31126111d9d..0a087fde1b0 100644 --- a/sql/ha_heap.h +++ b/sql/ha_heap.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB +/* Copyright (C) 2000,2004 MySQL AB & MySQL Finland AB & TCX DataKonsult AB This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -15,7 +15,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ -#ifdef __GNUC__ +#ifdef USE_PRAGMA_INTERFACE #pragma interface /* gcc class implementation */ #endif @@ -26,9 +26,13 @@ class ha_heap: public handler { HP_INFO *file; - - public: - ha_heap(TABLE *table): handler(table), file(0) {} + key_map btree_keys; + /* number of records changed since last statistics update */ + uint records_changed; + uint key_stat_version; +public: + ha_heap(TABLE *table): handler(table), file(0), records_changed(0), + key_stat_version(0) {} ~ha_heap() {} const char *table_type() const { return "HEAP"; } const char *index_type(uint inx) @@ -39,57 +43,58 @@ class ha_heap: public handler const char **bas_ext() const; ulong table_flags() const { - return (HA_READ_RND_SAME | HA_NO_INDEX | HA_KEYPOS_TO_RNDPOS | - HA_NO_BLOBS | HA_NULL_KEY | HA_REC_NOT_IN_SEQ | - HA_NO_AUTO_INCREMENT); + return (HA_FAST_KEY_READ | HA_NO_BLOBS | HA_NULL_IN_KEY | + HA_REC_NOT_IN_SEQ | HA_READ_RND_SAME | + HA_CAN_INSERT_DELAYED); } - ulong index_flags(uint inx) const + ulong index_flags(uint inx, uint part, bool all_parts) const { return ((table->key_info[inx].algorithm == HA_KEY_ALG_BTREE) ? - (HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER) : - (HA_ONLY_WHOLE_INDEX | HA_WRONG_ASCII_ORDER | - HA_NOT_READ_PREFIX_LAST)); + HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER | HA_READ_RANGE : + HA_ONLY_WHOLE_INDEX); } - uint max_record_length() const { return HA_MAX_REC_LENGTH; } - uint max_keys() const { return MAX_KEY; } - uint max_key_parts() const { return MAX_REF_PARTS; } - uint max_key_length() const { return HA_MAX_REC_LENGTH; } + const key_map *keys_to_use_for_scanning() { return &btree_keys; } + uint max_supported_keys() const { return MAX_KEY; } + uint max_supported_key_part_length() const { return MAX_KEY_LENGTH; } double scan_time() { return (double) (records+deleted) / 20.0+10; } double read_time(uint index, uint ranges, ha_rows rows) { return (double) rows / 20.0+1; } - virtual bool fast_key_read() { return 1;} int open(const char *name, int mode, uint test_if_locked); int close(void); + void set_keys_for_scanning(void); int write_row(byte * buf); int update_row(const byte * old_data, byte * new_data); int delete_row(const byte * buf); + longlong get_auto_increment(); int index_read(byte * buf, const byte * key, uint key_len, enum ha_rkey_function find_flag); int index_read_idx(byte * buf, uint idx, const byte * key, uint key_len, enum ha_rkey_function find_flag); + int index_read_last(byte * buf, const byte * key, uint key_len); int index_next(byte * buf); int index_prev(byte * buf); int index_first(byte * buf); int index_last(byte * buf); - int rnd_init(bool scan=1); + int rnd_init(bool scan); int rnd_next(byte *buf); int rnd_pos(byte * buf, byte *pos); void position(const byte *record); void info(uint); int extra(enum ha_extra_function operation); - int reset(void); int external_lock(THD *thd, int lock_type); int delete_all_rows(void); - ha_rows records_in_range(int inx, const byte *start_key,uint start_key_len, - enum ha_rkey_function start_search_flag, - const byte *end_key,uint end_key_len, - enum ha_rkey_function end_search_flag); + int disable_indexes(uint mode); + int enable_indexes(uint mode); + int indexes_are_disabled(void); + ha_rows records_in_range(uint inx, key_range *min_key, key_range *max_key); int delete_table(const char *from); int rename_table(const char * from, const char * to); int create(const char *name, TABLE *form, HA_CREATE_INFO *create_info); + void update_create_info(HA_CREATE_INFO *create_info); THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to, enum thr_lock_type lock_type); - +private: + void update_key_stats(); }; |