Description: If libmysql is compiled with WITH_SSL=NO,
--ssl-* are not useful.
Solution: 1. Restricted WITH_SSL to values : bundled | yes | system
2. Made "bundled" as default value for WITH_SSL. Also,
not specifying WITH_SSL or even specifying WITH_SSL=no
will be treated as/converted to WITH_SSL=bundled.
Reviewed-By: Tor Didriksen <tor.didriksen@oracle.com>
Reviewed-By: Georgi Kodinov <georgi.kodinov@oracle.com>
(cherry picked from commit 3eb2058be34d1a21771fe89ff1a0c08f156899bc)
Description: If libmysql is compiled with WITH_SSL=NO,
--ssl-* are not useful.
Solution: 1. Restricted WITH_SSL to values : bundled | yes | system
2. Made "bundled" as default value for WITH_SSL. Also,
not specifying WITH_SSL or even specifying WITH_SSL=no
will be treated as/converted to WITH_SSL=bundled.
Reviewed-By: Tor Didriksen <tor.didriksen@oracle.com>
Reviewed-By: Georgi Kodinov <georgi.kodinov@oracle.com>
The code that chooses between materialization of a non-correlated
IN subquery and its transformation into an EXISTS correlated
subquery assumes that the execution plan for the outer select
has been already built. However it was not always so if subqueries
occurred in the expressions used for ref access to tables of
the outer select. A call of the function create_ref_for_key() in
get_best_combination() could trigger a premature execution of
the above mentioned code when the execution plan structures for
the outer select were not fully built. This could cause a crash
of the server.
The fix postpones the calls of create_ref_for_key() until the
structures for the execution plan is fully built.
The motivation for this is that Perl is moving towards not having
current directory ./ in @INC by default. This is causing
mysql-test-run.pl to fail in latest Debian Unstable:
https://lists.debian.org/debian-devel-announce/2016/08/msg00013.html
However, we have `use "lib"`, there is no need for current directory
in @INC, except for a gross hack. In mtr_cases.pm, there is a
`require "mtr_misc.pl"`, which hides mtr_misc.pl away in mtr_cases
namespace. And things only work because mysql-test-run.pl loads it
with a different name, `require "lib/mtr_misc.pl"`! (Perl will
`require` only once for each unique filename).
Fix this by only using `require` in main program, and referencing
functions with :: scope from other namespaces. For multi-use in
different namespaces, proper `use` modules should be used.
Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org>
FROM THE CURRENT DIRECTORY
DESCRIPTION
===========
When 'mysqlaccess' tool is run, it reads (and executes) the
content of its configuration file 'mysqlaccess.conf' from
the current directory. This is not a recommended behaviour
as someone with ill intentions can insert malicious
instructions into this file which could be executed
whenever this tool is run.
ANALYSIS
========
The configuration file is presently looked for, in the
following folders (in given order):
1. Current directory
2. SYSCONFDIR //This gets expanded
3. /etc/
Owing to the reasons mentioned above, we should not permit
the file to be in the current directory. Since the other
two folders are assumed to be accessible only to authorized
people, the config file is safe to be read from there.
FIX
===
Modified the script so that it looks for the config file
now in the following two folders (in the given order):
1. SYSCONFDIR
2. /etc/
If it's absent from above locations but present in current
directory, an error is thrown asking the user to move the
file to one of the above locations and retry.
NOTE
====
The location paths and their precedence are not documented
for this tool. It needs to be noted as part of the
associated documentation.
PRIVILEGE.
Backport from mysql-5.7 to mysql-5.5 and mysql-5.6.
BUG#13969578: TEMPORARY TABLE IN A DATABASE ON A READ-ONLY
INSTANCE CAN BE OVERWRITTEN
Analysis:
========
Creation or modification of a persistent table by a non-super user
is NOT ALLOWED in read_only mode. Only TEMPORARY tables are allowed
to be created or modified in read_only mode. But the creation of
a persistent table was being allowed when a temporary table of
the same name existed.
The routine which denies updating a non-temporary table in a
read_only mode does not handle the case of creation of a regular
table when a temporary table of the same exists.
Fix:
===
Handled the condition where an attempt is made to create a persistent
table having the same name as that of the temporary table. Hence
the creation of a persistent table by a non-super user when a
temporary table of the same exists is denied under read_only mode.
Also fixed a wrong result for a test case for mdev-7691
(the alternative one).
The test cases for all these bug have materialized semi-joins used
inside dependent sub-queries.
The patch actually reverts the change inroduced by Monty in 2003.
It looks like this change is not valid anymore after the implementation
of semi-joins.
Adjusted output from EXPLAIN for many other test cases.
The test was unnecessarily depending on InnoDB purge, which can
sometimes fail to proceed.
Let us rewrite the test to use BEGIN;INSERT;ROLLBACK to cause the
immediate removal of the desired records.
While writing comments if database object names has a new
line character, then next line is considered a command, rather
than a comment.
This patch fixes the way comments are constructed in mysqldump.
(cherry picked from commit 1099f9d17b1c697c2760f86556f5bae7d202b444)
While writing comments if database object names has a new
line character, then next line is considered a command, rather
than a comment.
This patch fixes the way comments are constructed in mysqldump.
FT_BOOLEAN_CHECK_SYNTAX_STRING
ISSUE: my_isalnum macro used for checking if character is
alphanumeric dereferences uninitialized pointer
in default character set structure resulting in
server exiting abnormally.
FIX: Used standard isalnum function instead of macro my_isalnum.
failed with SELECT SQ, TEXT field
The functon find_all_keys does call Item_subselect::walk, which calls walk() for the subquery
The issue is that when a field is represented by Item_outer_ref(Item_direct_ref(Item_copy_string( ...))).
Item_copy_string does have a pointer to an Item_field in Item_copy::item but does not implement Item::walk method, so we are not
able to set the bitmap for that field. This is the reason why the assert fails.
Fixed by adding the walk method to Item_copy class.
MYSQL_OPT_SSL_MODE option introduced.
It is set in case of --ssl-mode=REQUIRED and permits only SSL connection.
(cherry picked from commit 3b2d28578c526f347f5cfe763681eff365731f99)
mysqld_safe is working on real files, however passing these file paths
as is to mysqld as options gives different meaning when paths are
relative.
mysqld_safe uses current working directory as basedir for relative paths,
while mysqld uses $datadir as basedir.
THREE BYTES ON X86
Analysis:
=========
The macro uint3korr reads 4 bytes of data instead of 3 on
on x86 machines.
Multiple definitions were created for this macro for
optimization in WIN32. The idea was to optimize reading of
3 byte ints by reading an ordinary int and masking away the
unused byte. However this is an undefined behavior. It will
be an issue unless users are aware of allocating an extra
byte for using this macro.
Fix:
====
Removing the definition which reads 4 bytes of data. The
only definition of this macro would now read just 3 bytes
of data thus prohibiting the usage of an extra byte.
Note:
=====
This is a backport of Patches #5 and #6 for Bug#17922198.
mysql_client uses some inline assembly code to switch thread stacks.
This works, however tools that perform backtrace get confused to fix
this we write a specific constant to signify bottom of stack. This
constant is needed when compiling with CLang as well.
This is essentially a backport of the 10.0
commit 203f4d4193
that fixes a bug and silences a GCC 6.3.0 warning
about a left shift of a signed integer.
Missing parenthesis in a macro definition caused wrong operation
in the Query_cache::send_result_to_client() statement
thd->query_plan_flags= (thd->query_plan_flags & ~QPLAN_QC_NO) | QPLAN_QC;
This would expand to
thd->query_plan_flags= (thd->query_plan_flags & ~1) << 6 | 1 << 5;
which would shift the flags by 6 and clear an unrelated flag, instead
of clearing the flag (1 << 6).
Provide more useful progress reporting of crash recovery.
recv_sys_t::progress_time: The time of the last report.
recv_scan_print_counter: Remove.
log_group_read_log_seg(): After after each I/O request,
report progress if needed.
recv_apply_hashed_log_recs(): At the start of each batch,
if there are pages to be recovered, issue a message.
The function posix_fallocate() as well as the Linux system call
fallocate() can return EINTR when the operation was interrupted
by a signal. In that case, keep retrying the operation, except
if InnoDB shutdown has been initiated.
Description:
============
If you have a relay log index file that has ended up with
some relay log files that do not exists, then RESET SLAVE
ALL is not enough to get back to a clean state.
Analysis:
=========
In the bug scenario slave server is in stopped state and
some of the relay logs got deleted but the relay log index
file is not updated.
During slave server restart replication initialization fails
as some of the required relay logs are missing. User
executes RESET SLAVE/RESET SLAVE ALL command to start a
clean slave. As per the documentation RESET SLAVE command
clears the master info and relay log info repositories,
deletes all the relay log files, and starts a new relay log
file. But in a scenario where the slave server's
Relay_log_info object is not initialized slave will not
purge the existing relay logs. Hence the index file still
remains in a bad state. Users will not be able to start
the slave unless these files are cleared.
Fix:
===
RESET SLAVE/RESET SLAVE ALL commands should do the cleanup
even in a scenario where Relay_log_info object
initialization failed.
Backported a flag named 'error_on_rli_init_info' which is
required to identify slave's Relay_log_info object
initialization failure. This flag exists in MySQL-5.6
onwards as part of BUG#14021292 fix.
During RESET SLAVE/RESET SLAVE ALL execution this flag
indicates the Relay_log_info initialization failure.
In such a case open the relay log index/relay log files
and do the required clean up.
