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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:
unknown
2007-01-29 10:40:26 +01:00
parent 6e1ba88418
commit 4e8b49d656
58 changed files with 483 additions and 441 deletions
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42
storage/myisam/mi_range.c
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@@ -21,13 +21,10 @@
#include "myisamdef.h"
#include "rt_index.h"
static ha_rows _mi_record_pos(MI_INFO *info,const byte *key,uint key_len,
enum ha_rkey_function search_flag);
static double _mi_search_pos(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *key,
uint key_len,uint nextflag,my_off_t pos);
static uint _mi_keynr(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *page,
uchar *keypos,uint *ret_max_key);
static ha_rows _mi_record_pos(MI_INFO *, const byte *, ulonglong,
enum ha_rkey_function);
static double _mi_search_pos(MI_INFO *,MI_KEYDEF *,uchar *, uint,uint,my_off_t);
static uint _mi_keynr(MI_INFO *info,MI_KEYDEF *,uchar *, uchar *,uint *);
/*
Estimate how many records there is in a given range
@@ -47,9 +44,8 @@ static uint _mi_keynr(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *page,
number Estimated number of rows
*/
ha_rows mi_records_in_range(MI_INFO *info, int inx, key_range *min_key,
key_range *max_key)
ha_rows mi_records_in_range(MI_INFO *info, int inx,
key_range *min_key, key_range *max_key)
{
ha_rows start_pos,end_pos,res;
DBUG_ENTER("mi_records_in_range");
@@ -87,7 +83,7 @@ ha_rows mi_records_in_range(MI_INFO *info, int inx, key_range *min_key,
}
key_buff= info->lastkey+info->s->base.max_key_length;
start_key_len= _mi_pack_key(info,inx, key_buff,
(uchar*) min_key->key, min_key->length,
(uchar*) min_key->key, min_key->keypart_map,
(HA_KEYSEG**) 0);
res= rtree_estimate(info, inx, key_buff, start_key_len,
myisam_read_vec[min_key->flag]);
@@ -97,14 +93,12 @@ ha_rows mi_records_in_range(MI_INFO *info, int inx, key_range *min_key,
#endif
case HA_KEY_ALG_BTREE:
default:
start_pos= (min_key ?
_mi_record_pos(info, min_key->key, min_key->length,
min_key->flag) :
(ha_rows) 0);
end_pos= (max_key ?
_mi_record_pos(info, max_key->key, max_key->length,
max_key->flag) :
info->state->records+ (ha_rows) 1);
start_pos= (min_key ? _mi_record_pos(info, min_key->key,
min_key->keypart_map, min_key->flag)
: (ha_rows) 0);
end_pos= (max_key ? _mi_record_pos(info, max_key->key,
max_key->keypart_map, max_key->flag)
: info->state->records + (ha_rows) 1);
res= (end_pos < start_pos ? (ha_rows) 0 :
(end_pos == start_pos ? (ha_rows) 1 : end_pos-start_pos));
if (start_pos == HA_POS_ERROR || end_pos == HA_POS_ERROR)
@@ -122,21 +116,21 @@ ha_rows mi_records_in_range(MI_INFO *info, int inx, key_range *min_key,
/* Find relative position (in records) for key in index-tree */
static ha_rows _mi_record_pos(MI_INFO *info, const byte *key, uint key_len,
static ha_rows _mi_record_pos(MI_INFO *info, const byte *key,
ulonglong keypart_map,
enum ha_rkey_function search_flag)
{
uint inx=(uint) info->lastinx, nextflag;
uint inx=(uint) info->lastinx, nextflag, key_len;
MI_KEYDEF *keyinfo=info->s->keyinfo+inx;
uchar *key_buff;
double pos;
DBUG_ENTER("_mi_record_pos");
DBUG_PRINT("enter",("search_flag: %d",search_flag));
DBUG_ASSERT(keypart_map);
if (key_len == 0)
key_len=USE_WHOLE_KEY;
key_buff=info->lastkey+info->s->base.max_key_length;
key_len=_mi_pack_key(info,inx,key_buff,(uchar*) key,key_len,
key_len=_mi_pack_key(info,inx,key_buff,(uchar*) key, keypart_map,
(HA_KEYSEG**) 0);
DBUG_EXECUTE("key",_mi_print_key(DBUG_FILE,keyinfo->seg,
(uchar*) key_buff,key_len););