MDEV-19210: do not run pre and post scripts as root
Now that we do not pollute systemd's environment but write private
environment files running these as root is not longer required. So
let's drop `PermissionsStartOnly=true`.
Debian adds extra `ExecStartPre=` and `ExecStartPost=`, though.
Use special executable prefix for full privileges there. (See
systemd.service(5) for details.)
MDEV-19210: use environment file in systemd units for _WSREP_START_POSITION
We used to run `systemctl set-environment` to pass
_WSREP_START_POSITION. This is bad because:
* it clutter systemd's environment (yes, pid 1)
* it requires root privileges
* options (like LimitNOFILE=) are not applied
Let's just create an environment file in ExecStartPre=, that is read
before ExecStart= kicks in. We have _WSREP_START_POSITION around for the
main process without any downsides.
The code inside Item_subselect::fix_fields() could fail to check
that left expression had an Item_row, like this:
(('x', 1.0) ,1) IN (SELECT 'x', 1.23 FROM ... UNION ...)
In order to hit the failure, the first SELECT of the subquery had
to be a degenerate no-tables select. In this case, execution will
not enter into Item_in_subselect::create_row_in_to_exists_cond()
and will not check if left_expr is composed of scalars.
But the subquery is a UNION so as a whole it is not degenerate.
We try to create an expression cache for the subquery.
We create a temp.table from left_expr columns. No field is created
for the Item_row. Then, we crash when trying to add an index over a
non-existent field.
Fixed by moving the left_expr cardinality check to a point in
check_and_do_in_subquery_rewrites() which gets executed for all
cases.
It's better to make the check early so we don't have to care about
subquery rewrite code hitting Item_row in left_expr.
MDEV-28998 remove a known reference to a SPIDER_CONN when it is freed
8660e2d...
by
Julius Goryavsky <email address hidden>
MDEV-29893: SST fails when having datadir set to a symlink
SST for mariabackup may not destroy old files if datadir or
other working directory is declared as a symlink due to the lack
of the "-L" option among the find utility options, similarly SST
for rsync in some cases may not transfer data directories if they
are created as symlinks. This fix adds the missing option and
generally unifies the work with find utility options to avoid
failures in the interpretation of directories and regular
expressions.
358209d...
by
Ian Gilfillan <email address hidden>
MDEV-32337 Assertion `pos < table->n_def' failed in dict_table_get_nth_col
While checking for altered column in foreign key constraints,
InnoDB fails to ignore virtual columns. This issue caused
by commit 5f09b53bdb4e973e7c7ec2c53a24c98321223f98(MDEV-31086).
