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Merge branch '10.4' into 10.5

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This commit is contained in:
Yuchen Pei
2023-12-07 16:38:00 +11:00
parent ddd5449c57 66fafdb922
commit 13dd787530
39 changed files with 754 additions and 141 deletions
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45
sql/opt_range.cc
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@@ -15010,13 +15010,6 @@ int QUICK_GROUP_MIN_MAX_SELECT::init()
{
if (group_prefix) /* Already initialized. */
return 0;
/*
We allocate one byte more to serve the case when the last field in
the buffer is compared using uint3korr (e.g. a Field_newdate field)
*/
if (!(last_prefix= (uchar*) alloc_root(&alloc, group_prefix_len+1)))
return 1;
/*
We may use group_prefix to store keys with all select fields, so allocate
enough space for it.
@@ -15273,8 +15266,7 @@ void QUICK_GROUP_MIN_MAX_SELECT::update_key_stat()
QUICK_GROUP_MIN_MAX_SELECT::reset()
DESCRIPTION
Initialize the index chosen for access and find and store the prefix
of the last group. The method is expensive since it performs disk access.
Initialize the index chosen for access.
RETURN
0 OK
@@ -15296,12 +15288,6 @@ int QUICK_GROUP_MIN_MAX_SELECT::reset(void)
}
if (quick_prefix_select && quick_prefix_select->reset())
DBUG_RETURN(1);
result= file->ha_index_last(record);
if (result == HA_ERR_END_OF_FILE)
DBUG_RETURN(0);
/* Save the prefix of the last group. */
key_copy(last_prefix, record, index_info, group_prefix_len);
DBUG_RETURN(0);
}
@@ -15347,34 +15333,20 @@ int QUICK_GROUP_MIN_MAX_SELECT::get_next()
#else
int result;
#endif
int is_last_prefix= 0;
DBUG_ENTER("QUICK_GROUP_MIN_MAX_SELECT::get_next");
/*
Loop until a group is found that satisfies all query conditions or the last
group is reached.
Loop until a group is found that satisfies all query conditions or
there are no satisfying groups left
*/
do
{
result= next_prefix();
/*
Check if this is the last group prefix. Notice that at this point
this->record contains the current prefix in record format.
*/
if (!result)
{
is_last_prefix= key_cmp(index_info->key_part, last_prefix,
group_prefix_len);
DBUG_ASSERT(is_last_prefix <= 0);
}
else
{
if (result == HA_ERR_KEY_NOT_FOUND)
continue;
if (result != 0)
break;
}
/*
At this point this->record contains the current prefix in record format.
*/
if (have_min)
{
min_res= next_min();
@@ -15403,8 +15375,7 @@ int QUICK_GROUP_MIN_MAX_SELECT::get_next()
HA_READ_KEY_EXACT);
result= have_min ? min_res : have_max ? max_res : result;
} while ((result == HA_ERR_KEY_NOT_FOUND || result == HA_ERR_END_OF_FILE) &&
is_last_prefix != 0);
} while (result == HA_ERR_KEY_NOT_FOUND || result == HA_ERR_END_OF_FILE);
if (result == HA_ERR_KEY_NOT_FOUND)
result= HA_ERR_END_OF_FILE;