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Merge DS-MRR/CPK improvements into 5.3-main

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This commit is contained in:
Sergey Petrunya
2010-12-13 13:42:40 +03:00
parent 419d524ff9 14ca046833
commit 58b646001a
41 changed files with 3250 additions and 534 deletions
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46
sql/handler.h
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@ -1156,6 +1156,23 @@ typedef void *range_seq_t;
typedef struct st_range_seq_if
{
/*
Get key information
SYNOPSIS
get_key_info()
init_params The seq_init_param parameter
length OUT length of the keys in this range sequence
map OUT key_part_map of the keys in this range sequence
DESCRIPTION
This function is set only when using HA_MRR_FIXED_KEY mode. In that mode,
all ranges are single-point equality ranges that use the same set of key
parts. This function allows the MRR implementation to get the length of
a key, and which keyparts it uses.
*/
void (*get_key_info)(void *init_params, uint *length, key_part_map *map);
/*
Initialize the traversal of range sequence
@ -1285,9 +1302,9 @@ void get_sweep_read_cost(TABLE *table, ha_rows nrows, bool interrupted,
COST_VECT *cost);
/*
The below two are not used (and not handled) in this milestone of this WL
entry because there seems to be no use for them at this stage of
implementation.
Indicates that all scanned ranges will be singlepoint (aka equality) ranges.
The ranges may not use the full key but all of them will use the same number
of key parts.
*/
#define HA_MRR_SINGLE_POINT 1
#define HA_MRR_FIXED_KEY 2
@ -1329,6 +1346,16 @@ void get_sweep_read_cost(TABLE *table, ha_rows nrows, bool interrupted,
*/
#define HA_MRR_NO_NULL_ENDPOINTS 128
/*
The MRR user has materialized range keys somewhere in the user's buffer.
This can be used for optimization of the procedure that sorts these keys
since in this case key values don't have to be copied into the MRR buffer.
In other words, it is guaranteed that after RANGE_SEQ_IF::next() call the
pointer in range->start_key.key will point to a key value that will remain
there until the end of the MRR scan.
*/
#define HA_MRR_MATERIALIZED_KEYS 256
/*
@ -1819,14 +1846,19 @@ public:
inline int ha_index_first(uchar * buf);
inline int ha_index_last(uchar * buf);
inline int ha_index_next_same(uchar *buf, const uchar *key, uint keylen);
/*
TODO: should we make for those functions non-virtual ha_func_name wrappers,
too?
*/
virtual ha_rows multi_range_read_info_const(uint keyno, RANGE_SEQ_IF *seq,
void *seq_init_param,
uint n_ranges, uint *bufsz,
uint *flags, COST_VECT *cost);
virtual ha_rows multi_range_read_info(uint keyno, uint n_ranges, uint keys,
uint *bufsz, uint *flags, COST_VECT *cost);
uint key_parts, uint *bufsz,
uint *flags, COST_VECT *cost);
virtual int multi_range_read_init(RANGE_SEQ_IF *seq, void *seq_init_param,
uint n_ranges, uint mode,
uint n_ranges, uint mode,
HANDLER_BUFFER *buf);
virtual int multi_range_read_next(char **range_info);
virtual int read_range_first(const key_range *start_key,
@ -2185,7 +2217,8 @@ public:
TRUE if the engine supports virtual columns
*/
virtual bool check_if_supported_virtual_columns(void) { return FALSE;}
TABLE* get_table() { return table; }
protected:
/* deprecated, don't use in new engines */
inline void ha_statistic_increment(ulong SSV::*offset) const { }
@ -2378,7 +2411,6 @@ private:
virtual int rename_partitions(const char *path)
{ return HA_ERR_WRONG_COMMAND; }
friend class ha_partition;
friend class DsMrr_impl;
public:
/* XXX to be removed, see ha_partition::partition_ht() */
virtual handlerton *partition_ht() const