While a replica may be reading events from the
primary, the primary is killed. Left to its own
devices, the IO thread may or may not stop in
error, depending on what it is doing when its
connection to the primary is killed (e.g. a
failed read results in an error, whereas if the
IO thread is idly waiting for events when the
connection dies, it will enter into a reconnect
loop and reconnect). MDEV-32168 changed the test
to always wait for the reconnect, thus breaking
the error case, as the IO thread would be stopped
at a time of expecting it to be running.

The fix is to manually stop/start the IO thread
to ensure it is in a consistent state.

Note that rpl_domain_id_filter_master_crash.test
will need additional changes after fixing MDEV-33268

Reviewed By:
============
Kristian Nielsen <knielsen@knielsen-hq.org>

This patch introduces the following behaviour for Linux while
maintaining old behaviour for Windows:

Ctrl + C (sigint) clears the current buffer and redraws the prompt.
Ctrl-C no longer exits the client if no query is running.
Ctrl-C kills the current running query if there is one. If there is an
error communicating with the server while trying to issue a KILL QUERY,
the client exits. This is in line with the past behaviour of Ctrl-C.
On Linux Ctrl-D can be used to close the client.
On Windows Ctrl-C and Ctrl-BREAK still exits the client if no query is running.
Windows can also exit the client via \q<enter> or exit<enter>.

== Implementation details ==
The Linux implementation has two corner cases, based on which library is
used: libreadline or libedit, both are handled in code to achieve the
same user experience.

Additional code is taken from MySQL, ensuring there is identical
behaviour on Windows, to MySQL's mysql client implementation for other
CTRL- related signals.

* The CTRL_CLOSE, CTRL_LOGOFF, CTRL_SHUTDOWN will issue the equivalent
  of CTRL-C and "end" the program. This ensures that the query is killed
  when the client is closed by closing the terminal, logging off the
  user or shutting down the system. The latter two signals are not sent
  for interactive applications, but it handles the case when a user has
  defined a service to use mysql client to issue a command. See
  https://learn.microsoft.com/en-us/windows/console/handlerroutine

This patch is built on top of the initial work done by Anel Husakovic
<anel@mariadb.org>.
Closes #2815

Modified `federatedx_io_mysql::actual_query` to set the time zone to '+00:00' only upon establishing a new connection instead of with each query execution.

This patch corrects the fix for MDEV-32569. The latter has not taken into
account the fact not each statement uses the SELECT_LEX structure. In
particular CALL statements do not use such structure. However the parameter
passed to the stored procedure used in such a statement may require an
invocation of Type_std_attributes::agg_item_set_converter().

Approved by Oleksandr Byelkin <sanja@mariadb.com>

os_file_set_size(): Let us invoke the Linux system call fallocate(2)
directly, because the GNU libc posix_fallocate() implements a fallback
that writes to the file 1 byte every 4096 or fewer bytes. In one
environment, invoking fallocate() directly would lead to 4 times the
file growth rate during ALTER TABLE. Presumably, what happened was
that the NFS server used a smaller allocation block size than 4096 bytes
and therefore created a heavily fragmented sparse file when
posix_fallocate() was used. For example, extending a file by 4 MiB
would create 1,024 file fragments. When the file is actually being
written to with data, it would be "unsparsed".

The built-in EOPNOTSUPP fallback in os_file_set_size() writes a buffer
of 1 MiB of NUL bytes. This was always used on musl libc and other
Linux implementations of posix_fallocate().

Modify the NS_ZERO state in the JSON number parser to allow
exponential notation with a zero coefficient (e.g. 0E-4).

The NS_ZERO state transition on 'E' was updated to move to the
NS_EX state rather than returning a syntax error. Similar change
was made for the NS_ZE1 (negative zero) starter state.

This allows accepted number grammar to include cases like:

- 0E4
- -0E-10

which were previously disallowed. Numeric parsing remains
the same for all other states.

Test cases are added to func_json.test to validate parsing for
various exponential numbers starting with zero coefficients.

All new code of the whole pull request, including one or several files
that are either new files or modified ones, are contributed under the
BSD-new license. I am contributing on behalf of my employer Amazon Web
Services.

It's ok to run these tests without ubsan too, and we get some tests
for free.

PageBulk::init(): Unnecessary reserves the extent before
allocating a page for bulk insert. btr_page_alloc()
capable of handing the extending of tablespace.

Fixed typo in mysql_admin_table which cused call of
close_unused_temporary_table_instances alwas for the first table
instead of the current table.

Added ASSERT that close_unused_temporary_table_instances should not
remove all instances of user created temporary table.

The failure described in MDEV-32997 is happening a bit too often and
polluting the CI results.

The spider init bug fixes remove any race conditions during spider
init.

Also remove the add_suppressions in spider/bugfix.mdev_27575 which is
a similar issue.

second part of the fix by Rainer Orth

When the host is not specified, it defaults to localhost.

A new column was introduced to the show index output in 10.6 in
f691d986

Thus we update the check of the number of columns to be at least 13,
rather than exactly 13.

Also backport an err number and format from 10.5 for better error
messages when the column number is wrong.

There are a large number of uses of `strerror` in the codebase,
the local declaration in `storage/connect/tabvct.cpp` is the only one.

Given that none is needed elsewhere, I conclude that this instance can
simply be removed.

initialize THD::rand in THD::init() not in THD::THD(),
because the former is also called when a THD is reused -
in COM_CHANGE_USER and in taking a THD from the cache.

Also use current cycle timer for more unpreditability

Item_float::neg() did not preserve the "presentation" from "this".
So
  CAST(-1e0 AS UNSIGNED)  -- cast from double to unsigned
changes its meaning to:
  CAST(-1 AS UNSIGNED)  -- cast signed to undigned

Fixing Item_float::neg() to construct the new value for
Item_float::presentation as follows:
- if the old value starts with minus, then the minus is truncated:
  '-2e0' -> '2e0'
- otherwise, minus sign followed by its old value:
  '1e0'  -> '-1e0'

The bitmap is temporarily flipped to ~0 for the sake of checking all
fields. It needs to be restored because it will be reused in second
and subsequent ps execution.

Fix by Rainer Orth

Fix by Rainer Orth

With the result like

encryption.innochecksum 'debug'   [ skipped ] combination not found

instead of

*** ERROR: Could not run encryption.innochecksum with 'debug' combination(s)

In commit b4ff6456 the
signature of mysql_show_var_func was changed, but not all functions
of that type were adjusted.

When the server is configured with `cmake -DWITH_ASAN=ON` and
compiled with clang, runtime errors would be flagged for invoking
functions through an incompatible function pointer.

Reviewed by: Michael 'Monty' Widenius

If a query contained a CTE whose name coincided with the name of one of
the base tables used in the specification of the CTE and the query had at
least two references to this CTE in the specifications of other CTEs then
processing of the query led to unlimited recursion that ultimately caused
a crash of the server.

Any secondary non-recursive reference to a CTE requires creation of a copy
of the CTE specification. All the references to CTEs in this copy must be
resolved. If the specification contains a reference to a base table whose
name coincides with the name of then CTE then it should be ensured that
this reference in no way can be resolved against the name of the CTE.

wsrep_plugin_init(), wsrep_plugin_deinit(): Remove these dummy functions
in order to fix an error that would be flagged by cmake -DWITH_UBSAN=ON
when using clang.

wsrep_show_ready(), wsrep_show_bf_aborts(): Correct the signature.

If a query has a HAVING clause that contains a predicate with a constant
IN subquery whose lef part in its turn is a subquery and the predicate is
subject to pushdown from HAVING to WHERE then execution of the query could
cause a crash of the server.

The cause of the problem was the missing implementation of the walk()
method for the class Item_in_optimizer. As a result in some cases the left
operand of the Item_in_optimizer condition could be traversed twice by
the walk procedure. For many call-back functions used as an argument of
this procedure it does not matter. Yet it matters for the call-back
function cleanup_excluding_immutables_processor() used in pushdown of
predicates from HAVING to WHERE. If the processed item is marked with
the IMMUTABLE_FL flag then the processor just removes this flag, otherwise
it performs cleanup of the item making it unfixed. If an item is marked
with an the IMMUTABLE_FL and it traversed with this processor twice then
it becomes unfixed after the second traversal though the flag indicates
that the item should not be cleaned up.

Approved by Oleksandr Byelkin <sanja@mariadb.com>

Problem:

sp_cache erroneously looked up fully qualified SP names (e.g. `DB`.`SP`),
in case insensitive style. It was wrong, because only the "name"
part is always case insensitive, while the "db" part should be compared
according to lower_case_table_names (case sensitively for 0,
case insensitively for 1 and 2).

Fix:

Adding a "casedn_name" parameter make_qname() to tell
if the name part should be lower cased:
  `DB1`.`SP` -> "DB1.SP"  (when casedn_name=false)
  `DB1`.`SP` -> "DB1.sp"  (when casedn_name=true)
and using make_qname() with casedn_name=true when creating
sp_cache hash lookup keys.

Details:

As a result, it now works as follows:
- sp_head::m_db is converted to lower case if lower_case_table_names>0
  during the sp_name initialization phase. So when make_qname() is called,
  sp_head::m_db is already normalized. There are no changes in here.

- The initialization phase of sp_head when creating sp_head::m_qname
  now calls make_qname() with casedn_name=true,
  so sp_head::m_name gets written to sp_head::m_qname in lower case.

- sp_cache_lookup() now also calls make_qname() with casedn_name=true,
  so sp_head::m_name gets written to the temporary lookup key in lower case.

- sp_cache::m_hashtable now uses case sensitive comparison

Part#1 A non-functional change

Changing the signature of Identifier_chain2::make_qname() from

  bool make_qname(MEM_ROOT *mem_root, LEX_CSTRING *dst) const;

to

  LEX_CSTRING make_qname(MEM_ROOT *mem_root) const;

Now the result is returned as LEX_CSTRING from the function rather than
is passed as a parameter.
The return value {NULL,0} means "EOM".

This is a requirement step to fix and merge easier
  MDEV-33019 The database part is not case sensitive in SP names

The original MDEV-31991 commit commend:

- Moving some of Database_qualified_name methods into a new class
  Identifier_chain2.

- Changing the data type of the following variables from
  Database_qualified_name to Identifier_chain2:

  * q_pkg_proc in LEX::call_statement_start()
  * q_pkg_func in LEX::make_item_func_call_generic()

Rationale:

The data type of Database_qualified_name::m_db will be changed
to Lex_ident_db soon. So Database_qualified_name won't be able
to store the `pkg.routine` part of `db.pkg.routine` any more,
because `pkg` must not depend on lower-case-table-names.

MDEV-31003 has introduced second execution for SELECTs that execute
under ps-protocol. The following tests in galera suites do not support
this mode of execution, disable it:

  galera.MDEV-27862
  galera.galera_log_output_csv
  galera.galera_query_cache
  galera.galera_query_cache_sync_wait
  galera_3nodes_sr.GCF-336
  galera_3nodes_sr.galera_sr_isolate_master
  galera_sr.galera_sr_large_fragment
  galera_sr.galera_sr_many_fragments
Signed-off-by: Julius Goryavsky <julius.goryavsky@mariadb.com>

Modified galera_sr.mysql-wsrep-features#165 test to be deterministic:
Added one wait condition to catch execution state after --send command.
Changed another wait condition to better match the execution state of the test thread.
Signed-off-by: Julius Goryavsky <julius.goryavsky@mariadb.com>

Loopback interface might not be configured, thus do not test it.
Signed-off-by: Julius Goryavsky <julius.goryavsky@mariadb.com>

AES block cipher mode CTR is available at the moment
only from OpenSSL 1.0.1. Do not run this testcase
using CTR combination if it is not available.
Signed-off-by: Julius Goryavsky <julius.goryavsky@mariadb.com>

Could not reproduce and bug report is incomplete i.e. there
is no error logs to analyze and 10.4 branch commit where
failure was seen is not mentioned. Enable test to get more information.
Signed-off-by: Julius Goryavsky <julius.goryavsky@mariadb.com>

Test case changes only to wait expected membership and
streaming replication status.
Signed-off-by: Julius Goryavsky <julius.goryavsky@mariadb.com>

ASAN uses *a lot* more stack. use not_asan.inc for tests
that recursively put a lot of data on the stack

In spider_db_mbase_util::print_item_func(), if the sql item_func has
an UNKNOWN_FUNC type, by default the spider group by handler (gbh)
transform infix to prefix. But regexp should remain infix, so we add
an if condition to account for this.