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WL#3700: Handler API change: all index search methods - that is,

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index_read(), index_read_idx(), index_read_last(), and
records_in_range() - instead of 'uint keylen' argument take
'ulonglong keypart_map', a bitmap showing which keyparts are
present in the key value.
Fallback method is provided for handlers that are lagging behind.
This commit is contained in:
serg@janus.mylan
2007-01-29 10:40:26 +01:00
parent 045d704709
commit a07fd5fa8f
58 changed files with 483 additions and 441 deletions
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23
sql/opt_range.h
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@ -37,17 +37,22 @@ class QUICK_RANGE :public Sql_alloc {
public:
char *min_key,*max_key;
uint16 min_length,max_length,flag;
ulonglong min_keypart_map, max_keypart_map;
#ifdef HAVE_purify
uint16 dummy; /* Avoid warnings on 'flag' */
#endif
QUICK_RANGE(); /* Full range */
QUICK_RANGE(const char *min_key_arg,uint min_length_arg,
const char *max_key_arg,uint max_length_arg,
QUICK_RANGE(const char *min_key_arg, uint min_length_arg,
ulonglong min_keypart_map_arg,
const char *max_key_arg, uint max_length_arg,
ulonglong max_keypart_map_arg,
uint flag_arg)
: min_key((char*) sql_memdup(min_key_arg,min_length_arg+1)),
max_key((char*) sql_memdup(max_key_arg,max_length_arg+1)),
min_length((uint16) min_length_arg),
max_length((uint16) max_length_arg),
min_keypart_map(min_keypart_map_arg),
max_keypart_map(max_keypart_map_arg),
flag((uint16) flag_arg)
{
#ifdef HAVE_purify
@ -318,7 +323,8 @@ public:
int reset(void);
int get_next();
void range_end();
int get_next_prefix(uint prefix_length, byte *cur_prefix);
int get_next_prefix(uint prefix_length, ulonglong keypart_map,
byte *cur_prefix);
bool reverse_sorted() { return 0; }
bool unique_key_range();
int init_ror_merged_scan(bool reuse_handler);
@ -605,6 +611,7 @@ private:
byte *tmp_record; /* Temporary storage for next_min(), next_max(). */
byte *group_prefix; /* Key prefix consisting of the GROUP fields. */
uint group_prefix_len; /* Length of the group prefix. */
uint group_key_parts;
byte *last_prefix; /* Prefix of the last group for detecting EOF. */
bool have_min; /* Specify whether we are computing */
bool have_max; /* a MIN, a MAX, or both. */
@ -616,6 +623,7 @@ private:
uint key_infix_len;
DYNAMIC_ARRAY min_max_ranges; /* Array of range ptrs for the MIN/MAX field. */
uint real_prefix_len; /* Length of key prefix extended with key_infix. */
uint real_key_parts;
List<Item_sum> *min_functions;
List<Item_sum> *max_functions;
List_iterator<Item_sum> *min_functions_it;
@ -638,10 +646,11 @@ private:
public:
QUICK_GROUP_MIN_MAX_SELECT(TABLE *table, JOIN *join, bool have_min,
bool have_max, KEY_PART_INFO *min_max_arg_part,
uint group_prefix_len, uint used_key_parts,
KEY *index_info, uint use_index, double read_cost,
ha_rows records, uint key_infix_len,
byte *key_infix, MEM_ROOT *parent_alloc);
uint group_prefix_len, uint group_key_parts,
uint used_key_parts, KEY *index_info, uint
use_index, double read_cost, ha_rows records, uint
key_infix_len, byte *key_infix, MEM_ROOT
*parent_alloc);
~QUICK_GROUP_MIN_MAX_SELECT();
bool add_range(SEL_ARG *sel_range);
void update_key_stat();