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Merge branch '10.2' into 10.3

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This commit is contained in:
Oleksandr Byelkin
2020-12-23 19:28:02 +01:00
parent fa1aef39eb 8d8370e31d
commit 25561435e0
115 changed files with 1936 additions and 1234 deletions
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24
sql/opt_range.cc
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@ -7175,6 +7175,30 @@ SEL_TREE *Item_func_in::get_func_mm_tree(RANGE_OPT_PARAM *param,
if (array->count > NOT_IN_IGNORE_THRESHOLD || !value_item)
DBUG_RETURN(0);
/*
If this is "unique_key NOT IN (...)", do not consider it sargable (for
any index, not just the unique one). The logic is as follows:
- if there are only a few constants, this condition is not selective
(unless the table is also very small in which case we won't gain
anything)
- If there are a lot of constants, the overhead of building and
processing enormous range list is not worth it.
*/
if (param->using_real_indexes)
{
key_map::Iterator it(field->key_start);
uint key_no;
while ((key_no= it.next_bit()) != key_map::Iterator::BITMAP_END)
{
KEY *key_info= &field->table->key_info[key_no];
if (key_info->user_defined_key_parts == 1 &&
(key_info->flags & HA_NOSAME))
{
DBUG_RETURN(0);
}
}
}
/* Get a SEL_TREE for "(-inf|NULL) < X < c_0" interval. */
uint i=0;
do