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Merged, most likely needs post-merge fix

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This commit is contained in:
sergefp@mysql.com
2003-11-21 00:27:54 +03:00
parent 5e46a05960 4016048d81
commit 30b3c3bf1b
16 changed files with 1927 additions and 151 deletions
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105
sql/sql_select.cc
View File

@ -32,7 +32,8 @@
const char *join_type_str[]={ "UNKNOWN","system","const","eq_ref","ref",
"MAYBE_REF","ALL","range","index","fulltext",
"ref_or_null","unique_subquery","index_subquery"
"ref_or_null","unique_subquery","index_subquery",
"index_merge"
};
const key_map key_map_empty(0);
@ -116,7 +117,7 @@ static int join_read_next_same_or_null(READ_RECORD *info);
static COND *make_cond_for_table(COND *cond,table_map table,
table_map used_table);
static Item* part_of_refkey(TABLE *form,Field *field);
static uint find_shortest_key(TABLE *table, const key_map *usable_keys);
uint find_shortest_key(TABLE *table, const key_map *usable_keys);
static bool test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,
ha_rows select_limit, bool no_changes);
static int create_sort_index(THD *thd, JOIN *join, ORDER *order,
@ -3417,7 +3418,7 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond)
with key reading */
if (tab->needed_reg.is_clear_all() && tab->type != JT_EQ_REF
&& tab->type != JT_FT && (tab->type != JT_REF ||
(uint) tab->ref.key == tab->quick->index))
(uint) tab->ref.key == tab->quick->index))
{
sel->quick=tab->quick; // Use value from get_quick_...
sel->quick_keys.clear_all();
@ -6745,7 +6746,7 @@ static int test_if_order_by_key(ORDER *order, TABLE *table, uint idx,
return reverse;
}
static uint find_shortest_key(TABLE *table, const key_map *usable_keys)
uint find_shortest_key(TABLE *table, const key_map *usable_keys)
{
uint min_length= (uint) ~0;
uint best= MAX_KEY;
@ -6879,6 +6880,9 @@ test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,ha_rows select_limit,
}
else if (select && select->quick) // Range found by opt_range
{
/* assume results are not ordered when index merge is used */
if (select->quick->get_type() == QUICK_SELECT_I::QS_TYPE_INDEX_MERGE)
DBUG_RETURN(0);
ref_key= select->quick->index;
ref_key_parts= select->quick->used_key_parts;
}
@ -6913,6 +6917,10 @@ test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,ha_rows select_limit,
}
else
{
/*
We have verified above that select->quick is not
index_merge quick select.
*/
select->quick->index= new_ref_key;
select->quick->init();
}
@ -6934,10 +6942,13 @@ test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,ha_rows select_limit,
*/
if (!select->quick->reverse_sorted())
{
if (table->file->index_flags(ref_key) & HA_NOT_READ_PREFIX_LAST)
if (table->file->index_flags(ref_key) & HA_NOT_READ_PREFIX_LAST ||
(select->quick->get_type() ==
QUICK_SELECT_I::QS_TYPE_INDEX_MERGE))
DBUG_RETURN(0); // Use filesort
// ORDER BY range_key DESC
QUICK_SELECT_DESC *tmp=new QUICK_SELECT_DESC(select->quick,
// ORDER BY range_key DESC
QUICK_SELECT_DESC *tmp=new QUICK_SELECT_DESC((QUICK_RANGE_SELECT*)(select->quick),
used_key_parts);
if (!tmp || tmp->error)
{
@ -7079,8 +7090,11 @@ create_sort_index(THD *thd, JOIN *join, ORDER *order,
{
select->quick=tab->quick;
tab->quick=0;
/* We can only use 'Only index' if quick key is same as ref_key */
if (table->key_read && (uint) tab->ref.key != select->quick->index)
/*
We can only use 'Only index' if quick key is same as ref_key
and in index_merge 'Only index' cannot be used
*/
if (table->key_read && ((uint) tab->ref.key != select->quick->index))
{
table->key_read=0;
table->file->extra(HA_EXTRA_NO_KEYREAD);
@ -8880,12 +8894,15 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
JOIN_TAB *tab=join->join_tab+i;
TABLE *table=tab->table;
char buff[512],*buff_ptr=buff;
char buff1[512], buff2[512];
char buff1[512], buff2[512], buff3[512];
char keylen_str_buf[64];
char derived_name[64];
String tmp1(buff1,sizeof(buff1),cs);
String tmp2(buff2,sizeof(buff2),cs);
String tmp3(buff3,sizeof(buff3),cs);
tmp1.length(0);
tmp2.length(0);
tmp3.length(0);
item_list.empty();
item_list.push_back(new Item_int((int32)
@ -8894,7 +8911,13 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
strlen(join->select_lex->type),
cs));
if (tab->type == JT_ALL && tab->select && tab->select->quick)
tab->type= JT_RANGE;
{
if (tab->select->quick->get_type() ==
QUICK_SELECT_I::QS_TYPE_INDEX_MERGE)
tab->type = JT_INDEX_MERGE;
else
tab->type = JT_RANGE;
}
if (table->derived_select_number)
{
/* Derived table name generation */
@ -8930,10 +8953,14 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
if (tab->ref.key_parts)
{
KEY *key_info=table->key_info+ tab->ref.key;
register uint length;
item_list.push_back(new Item_string(key_info->name,
strlen(key_info->name),
system_charset_info));
item_list.push_back(new Item_int((int32) tab->ref.key_length));
length= longlong2str(tab->ref.key_length, keylen_str_buf, 10) -
keylen_str_buf;
item_list.push_back(new Item_string(keylen_str_buf, length,
system_charset_info));
for (store_key **ref=tab->ref.key_copy ; *ref ; ref++)
{
if (tmp2.length())
@ -8945,18 +8972,60 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
else if (tab->type == JT_NEXT)
{
KEY *key_info=table->key_info+ tab->index;
register uint length;
item_list.push_back(new Item_string(key_info->name,
strlen(key_info->name),cs));
item_list.push_back(new Item_int((int32) key_info->key_length));
length= longlong2str(key_info->key_length, keylen_str_buf, 10) -
keylen_str_buf;
item_list.push_back(new Item_string(keylen_str_buf,
length,
system_charset_info));
item_list.push_back(item_null);
}
else if (tab->select && tab->select->quick)
{
KEY *key_info=table->key_info+ tab->select->quick->index;
item_list.push_back(new Item_string(key_info->name,
strlen(key_info->name),cs));
item_list.push_back(new Item_int((int32) tab->select->quick->
max_used_key_length));
if (tab->select->quick->get_type() ==
QUICK_SELECT_I::QS_TYPE_INDEX_MERGE)
{
QUICK_INDEX_MERGE_SELECT *quick_imerge=
(QUICK_INDEX_MERGE_SELECT*)tab->select->quick;
QUICK_RANGE_SELECT *quick;
List_iterator_fast<QUICK_RANGE_SELECT> it(quick_imerge->
quick_selects);
while ((quick= it++))
{
KEY *key_info= table->key_info + quick->index;
register uint length;
if (tmp3.length())
tmp3.append(',');
tmp3.append(key_info->name);
if (tmp2.length())
tmp2.append(',');
length= longlong2str(quick->max_used_key_length, keylen_str_buf,
10) -
keylen_str_buf;
tmp2.append(keylen_str_buf, length);
}
}
else
{
KEY *key_info= table->key_info + tab->select->quick->index;
register uint length;
tmp3.append(key_info->name);
length= longlong2str(tab->select->quick->max_used_key_length,
keylen_str_buf, 10) -
keylen_str_buf;
tmp2.append(keylen_str_buf, length);
}
item_list.push_back(new Item_string(tmp3.ptr(),tmp3.length(),cs));
item_list.push_back(new Item_string(tmp2.ptr(),tmp2.length(),cs));
item_list.push_back(item_null);
}
else