diff options
Diffstat (limited to 'sql/handler.h')
| -rw-r--r-- | sql/handler.h | 166 |
1 files changed, 152 insertions, 14 deletions
diff --git a/sql/handler.h b/sql/handler.h index fb1904f23dc..31a40d6ce31 100644 --- a/sql/handler.h +++ b/sql/handler.h @@ -30,6 +30,10 @@ #define USING_TRANSACTIONS +#if MAX_KEY > 128 +#error MAX_KEY is too large. Values up to 128 are supported. +#endif + // the following is for checking tables #define HA_ADMIN_ALREADY_DONE 1 @@ -601,8 +605,9 @@ struct handlerton SHOW_COMP_OPTION state; /* - Historical number used for frm file to determine the correct storage engine. - This is going away and new engines will just use "name" for this. + Historical number used for frm file to determine the correct + storage engine. This is going away and new engines will just use + "name" for this. */ enum legacy_db_type db_type; /* @@ -1138,6 +1143,12 @@ public: Interval returned by get_auto_increment() and being consumed by the inserter. */ + /* Statistics variables */ + ulonglong rows_read; + ulonglong rows_changed; + /* One bigger than needed to avoid to test if key == MAX_KEY */ + ulonglong index_rows_read[MAX_KEY+1]; + Discrete_interval auto_inc_interval_for_cur_row; /** Number of reserved auto-increment intervals. Serves as a heuristic @@ -1156,7 +1167,10 @@ public: locked(FALSE), implicit_emptied(0), pushed_cond(0), next_insert_id(0), insert_id_for_cur_row(0), auto_inc_intervals_count(0) - {} + { + reset_statistics(); + } + virtual ~handler(void) { DBUG_ASSERT(locked == FALSE); @@ -1278,10 +1292,16 @@ public: virtual void print_error(int error, myf errflag); virtual bool get_error_message(int error, String *buf); uint get_dup_key(int error); + void reset_statistics() + { + rows_read= rows_changed= 0; + bzero(index_rows_read, sizeof(index_rows_read)); + } virtual void change_table_ptr(TABLE *table_arg, TABLE_SHARE *share) { table= table_arg; table_share= share; + reset_statistics(); } virtual double scan_time() { return ulonglong2double(stats.data_file_length) / IO_SIZE + 2; } @@ -1390,22 +1410,23 @@ public: } /** @brief - Positions an index cursor to the index specified in the handle. Fetches the - row if available. If the key value is null, begin at the first key of the - index. + Positions an index cursor to the index specified in the + handle. Fetches the row if available. If the key value is null, + begin at the first key of the index. */ +protected: virtual int index_read_map(uchar * buf, const uchar * key, key_part_map keypart_map, enum ha_rkey_function find_flag) { uint key_len= calculate_key_len(table, active_index, key, keypart_map); - return index_read(buf, key, key_len, find_flag); + return index_read(buf, key, key_len, find_flag); } /** @brief - Positions an index cursor to the index specified in the handle. Fetches the - row if available. If the key value is null, begin at the first key of the - index. + Positions an index cursor to the index specified in the + handle. Fetches the row if available. If the key value is null, + begin at the first key of the index. */ virtual int index_read_idx_map(uchar * buf, uint index, const uchar * key, key_part_map keypart_map, @@ -1430,6 +1451,79 @@ public: uint key_len= calculate_key_len(table, active_index, key, keypart_map); return index_read_last(buf, key, key_len); } + inline void update_index_statistics() + { + index_rows_read[active_index]++; + rows_read++; + } +public: + + /* Similar functions like the above, but does statistics counting */ + inline int ha_index_read_map(uchar * buf, const uchar * key, + key_part_map keypart_map, + enum ha_rkey_function find_flag) + { + int error= index_read_map(buf, key, keypart_map, find_flag); + if (!error) + update_index_statistics(); + return error; + } + inline int ha_index_read_idx_map(uchar * buf, uint index, const uchar * key, + key_part_map keypart_map, + enum ha_rkey_function find_flag) + { + int error= index_read_idx_map(buf, index, key, keypart_map, find_flag); + if (!error) + { + rows_read++; + index_rows_read[index]++; + } + return error; + } + inline int ha_index_next(uchar * buf) + { + int error= index_next(buf); + if (!error) + update_index_statistics(); + return error; + } + inline int ha_index_prev(uchar * buf) + { + int error= index_prev(buf); + if (!error) + update_index_statistics(); + return error; + } + inline int ha_index_first(uchar * buf) + { + int error= index_first(buf); + if (!error) + update_index_statistics(); + return error; + } + inline int ha_index_last(uchar * buf) + { + int error= index_last(buf); + if (!error) + update_index_statistics(); + return error; + } + inline int ha_index_next_same(uchar *buf, const uchar *key, uint keylen) + { + int error= index_next_same(buf, key, keylen); + if (!error) + update_index_statistics(); + return error; + } + inline int ha_index_read_last_map(uchar * buf, const uchar * key, + key_part_map keypart_map) + { + int error= index_read_last_map(buf, key, keypart_map); + if (!error) + update_index_statistics(); + return error; + } + virtual int read_multi_range_first(KEY_MULTI_RANGE **found_range_p, KEY_MULTI_RANGE *ranges, uint range_count, bool sorted, HANDLER_BUFFER *buffer); @@ -1443,6 +1537,7 @@ public: void ft_end() { ft_handler=NULL; } virtual FT_INFO *ft_init_ext(uint flags, uint inx,String *key) { return NULL; } +private: virtual int ft_read(uchar *buf) { return HA_ERR_WRONG_COMMAND; } virtual int rnd_next(uchar *buf)=0; virtual int rnd_pos(uchar * buf, uchar *pos)=0; @@ -1453,11 +1548,50 @@ public: handlers for random position. */ virtual int rnd_pos_by_record(uchar *record) - { - position(record); - return rnd_pos(record, ref); - } + { + position(record); + return rnd_pos(record, ref); + } virtual int read_first_row(uchar *buf, uint primary_key); +public: + + /* Same as above, but with statistics */ + inline int ha_ft_read(uchar *buf) + { + int error= ft_read(buf); + if (!error) + rows_read++; + return error; + } + inline int ha_rnd_next(uchar *buf) + { + int error= rnd_next(buf); + if (!error) + rows_read++; + return error; + } + inline int ha_rnd_pos(uchar *buf, uchar *pos) + { + int error= rnd_pos(buf, pos); + if (!error) + rows_read++; + return error; + } + inline int ha_rnd_pos_by_record(uchar *buf) + { + int error= rnd_pos_by_record(buf); + if (!error) + rows_read++; + return error; + } + inline int ha_read_first_row(uchar *buf, uint primary_key) + { + int error= read_first_row(buf, primary_key); + if (!error) + rows_read++; + return error; + } + /** The following 3 function is only needed for tables that may be internal temporary tables during joins. @@ -1626,6 +1760,9 @@ public: virtual bool is_crashed() const { return 0; } virtual bool auto_repair() const { return 0; } + void update_global_table_stats(); + void update_global_index_stats(); + #define CHF_CREATE_FLAG 0 #define CHF_DELETE_FLAG 1 #define CHF_RENAME_FLAG 2 @@ -1944,6 +2081,7 @@ private: { return HA_ERR_WRONG_COMMAND; } virtual int rename_partitions(const char *path) { return HA_ERR_WRONG_COMMAND; } + friend class ha_partition; }; |