WSL wasn't keeping stack of renamed files
(https://github.com/microsoft/WSL/issues/8443)
resulting in the fstat calls in os_file_set_size returning
ENOENT and no fallocate fallback being possible.
Users reported MySQL was ok, and it used my_seek to
determine the size. We copy this concept here to avoid
the WSL bug.
MDEV-28871: Assert ... failed in JOIN::dbug_verify_sj_inner_tables...
optimize_semi_joins() calls update_sj_state() to update semi-join
optimization state in the JOIN class.
greedy_search() algorithm considers different join prefixes,
and then picks one table to put into the join prefix.
Most of the semi-join optimization state is in the table's entry
in the join->positions[cur_prefix_size].
However, it also needs to call update_sj_state() to update the
semi-join optimization state in the JOIN class.
There is one exception, which is the cause of this bug: when we're
inside optimize_semi_join_nests() and are optimizing a subquery,
optimize_semi_joins() does nothing, it doesn't call update_sj_state().
MDEV-26544 Assertion `part_share->auto_inc_initialized' failed in ha_partition::get_auto_increment on INSERT
The partition storage engine ignores return (error) values of
handler::info(). As a result, a query that should be aborted is
not aborted and then the server violates the assertion.
MDEV-29011 Server crash in spider_db_open_item_cond with XOR operator
Item_func_xor and Item_cond are both derived class of Item_bool_func.
Spider converts *Item_func_xor to *Item_cond and then calls the member
function argument_list(), which Item_func_xor does not implement.
