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Merge mysql.com:/home/gluh/MySQL/Merge/5.0-opt

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into  mysql.com:/home/gluh/MySQL/Merge/5.1-opt
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gluh@eagle.(none)
2007-02-02 10:25:45 +04:00
parent 1096dbd5fa d1185aaeaf
commit 7849d31923
32 changed files with 693 additions and 63 deletions
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14
sql/opt_range.cc
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@@ -219,6 +219,8 @@ public:
}
inline void merge_flags(SEL_ARG *arg) { maybe_flag|=arg->maybe_flag; }
inline void maybe_smaller() { maybe_flag=1; }
/* Return true iff it's a single-point null interval */
inline bool is_null_interval() { return maybe_null && max_value[0] == 1; }
inline int cmp_min_to_min(SEL_ARG* arg)
{
return sel_cmp(field,min_value, arg->min_value, min_flag, arg->min_flag);
@@ -560,7 +562,8 @@ public:
bool is_ror_scan;
/* Number of ranges in the last checked tree->key */
uint n_ranges;
};
uint8 first_null_comp; /* first null component if any, 0 - otherwise */
} PARAM;
class TABLE_READ_PLAN;
class TRP_RANGE;
@@ -7016,6 +7019,7 @@ check_quick_select(PARAM *param,uint idx,SEL_ARG *tree, bool update_tbl_stats)
DBUG_ENTER("check_quick_select");
param->is_ror_scan= FALSE;
param->first_null_comp= 0;
if (!tree)
DBUG_RETURN(HA_POS_ERROR); // Can't use it
@@ -7116,6 +7120,7 @@ check_quick_keys(PARAM *param,uint idx,SEL_ARG *key_tree,
ha_rows records=0, tmp;
uint tmp_min_flag, tmp_max_flag, keynr, min_key_length, max_key_length;
char *tmp_min_key, *tmp_max_key;
uint8 save_first_null_comp= param->first_null_comp;
param->max_key_part=max(param->max_key_part,key_tree->part);
if (key_tree->left != &null_element)
@@ -7153,6 +7158,9 @@ check_quick_keys(PARAM *param,uint idx,SEL_ARG *key_tree,
param->is_ror_scan= FALSE;
}
if (!param->first_null_comp && key_tree->is_null_interval())
param->first_null_comp= key_tree->part+1;
if (key_tree->next_key_part &&
key_tree->next_key_part->part == key_tree->part+1 &&
key_tree->next_key_part->type == SEL_ARG::KEY_RANGE)
@@ -7196,7 +7204,8 @@ check_quick_keys(PARAM *param,uint idx,SEL_ARG *key_tree,
(param->table->key_info[keynr].flags & (HA_NOSAME | HA_END_SPACE_KEY)) ==
HA_NOSAME &&
min_key_length == max_key_length &&
!memcmp(param->min_key,param->max_key,min_key_length))
!memcmp(param->min_key,param->max_key,min_key_length) &&
!param->first_null_comp)
{
tmp=1; // Max one record
param->n_ranges++;
@@ -7271,6 +7280,7 @@ check_quick_keys(PARAM *param,uint idx,SEL_ARG *key_tree,
return tmp;
records+=tmp;
}
param->first_null_comp= save_first_null_comp;
return records;
}