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`derived->table' failed in mysql_derived_merge_for_insert
Before "merge" view shoud be inited to maintaing transitive attributes like "multitable".
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The test wasn't restoring log_output properly.
Also added output of query_time in case of wrong result, to
investigate the failure described in MDEV-13408
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the value for tmp_table_size is small
Fixed by making sure that the sort buffer would have atleast MERGEBUFF2 keys.
Also fixed MDEV-13457 by making sure that an empty tree is never dumped to the disk
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Problem
rpl.rpl_mdev-11092 fails in buildbot because after starting slave in
wait_for_slave_sql_error_and_skip.inc slave is started but there may be
chances that we have not skipped the last error and Last_SQL_Errno is
still not zero untill the end of rpl_end.inc , which will compare
Last_SQL_Errno to 0. So in this this case rpl_mdev-11092 fails.
Solution
After starting slave in wait_for_slave_sql_error_and_skip.inc we will wait for
Last_SQL_Errno to become 0.
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Inspired by: https://github.com/devexp-db/mariadb/blob/f27/mariadb-covscan-stroverflow.patch
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Signed-off-by: Daniel Black <daniel.black@au.ibm.com>
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test case
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simplify.
add a test case.
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Corrected the revert.
(cherry picked from commit f637e524bf9b692c3ed46d856e2beac193b42a3e)
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Temporary revert of the VS2008 redist check.
(cherry picked from commit 36ec550fe5fa6b2a997cb39d3b9e33988f525c96)
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Fixed generated mysql_server.wxs not to contain duplicates, or too long ids
(cherry picked from commit bf47fb74dcc3e84057314817c56e6f8e05af094c)
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RPL_SEMI_SYNC_MASTER_CLIENTS=1
Analysis: Uninstalling rpl_semi_sync_slave on slave
will trigger removing the slave logic on Master which
will reduce Rpl_semi_sync_master_clients by one number.
But it happens asynchronously on Master. Having assert
to check this value with zero will have problems on
slow pb2 machines.
Fix: Change assert into wait_for_status_var condition.
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Added matching redist prerequisite check to the server msi installer.
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GROUP BY
Issue 1:
--------
This problem occurs in the following conditions:
1) A UNION is present in the subquery of select list and
handles multiple columns.
2) Query has a GROUP BY.
A temporary table is created to handle the UNION.
Item_field objects are based on the expressions of the
result of the UNION (ie. the fake_select_lex). While
checking validity of the columns in the GROUP BY list, the
columns of the temporary table are checked in
Item_ident::local_column. But the Item_field objects
created for the temporary table don't have information like
the Name_resolution_context that they belong to or whether
they are dependent on an outer query. Since these members
are null, incorrect behavior is caused.
This can happen when such Item objects are cached to apply
the IN-to-EXISTS transform for Item_row.
Solution to Issue 1:
--------------------
Context information of the first select in the UNION will
be assigned to the new Item_field objects.
Issue 2:
--------
This problem occurs in the following conditions:
1) A UNION is present in the subquery of select list.
2) A column in the UNION's first SELECT refers to a table
in the outer-query making it a dependent union.
3) GROUP BY column refers to the outer-referencing column.
While resolving the select list with an outer-reference, an
Item_outer_ref object is created to handle the
outer-query's GROUP BY list. The Item_outer_ref object
replaces the Item_field object in the item tree.
Item_outer_ref::fix_fields will be called only while fixing
the inner references of the outer query.
Before resolving the outer-query, an Item_type_holder
object needs to be created to handle the UNION. But as
explained above, the Item_outer_ref object has not been
fixed yet. Having a fixed Item object is a pre-condition
for creating an Item_type_holder.
Solution to Issue 2:
--------------------
Use the reference (real_item()) of an Item_outer_ref object
instead of the object itself while creating an
Item_type_holder.
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Description: If mysql_stmt_close() encountered error,
it recorded error in prepared statement
but then frees memory assigned to prepared
statement. If mysql_stmt_error() is used
to get error information, it will result
into use after free.
In all cases where mysql_stmt_close() can
fail, error would have been set by
cli_advanced_command in MYSQL structure.
Solution: Don't copy error from MYSQL using set_stmt_errmsg.
There is no automated way to test the fix since
it is in mysql_stmt_close() which does not expect
any reply from server.
Reviewed-By: Georgi Kodinov <georgi.kodinov@oracle.com>
Reviewed-By: Ramil Kalimullin <ramil.kalimullin@oracle.com>
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XML
Post-push fix for build failure on Linux machine
sles11-x86-64bit
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When there are quotes in the USE statement, the mysql client does
not correctly escape them.
The USE statement is processed line by line from the client's parser,
and cannot handle multi-line commands as the server.
The fix is to escape the USE parameters whenever quotes are used.
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XML
DESCRIPTION
===========
LOAD XML INFILE performance becomes painfully slow if the
tags' value has any space(s) in between them. They're
usually kept intentionally for indentation purpose.
ANALYSIS
========
The extra spaces are calling clear_level() many a times
which is having overhead of clearing taglist etc. This can
be avoided altogether by skipping all such spaces.
FIX
===
Trim all the starting whitespaces from the value before
passing it to read_value()
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Backport to 5.5
Current MySQL builds, even on Pushbuild, are not reproducible; they return
different results depending on which directory they are built from (and
Pushbuild uses several different directories). This is because absolute paths
leak into debug information, and even worse, __FILE__. The latter moves code
around enough that we've actually seen sysbench changes on the order of 4% in
some tests.
CMake seemingly insists on using absolute paths, but we can insert our own
layer between CMake and GCC to relativize all paths. Also give the right flags
to get debug information reproducible and turn off build stamping. This makes
the mysqld build 100% bit-for-bit reproducible between runs on my machine,
even when run from different directories.
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SYMLINK CHECK RACE CONDITIONS
ANALYSIS:
=========
A potential defect exists in the handling of CREATE
TABLE .. DATA DIRECTORY/ INDEX DIRECTORY which gives way to
the user to gain access to another user table or a system
table.
FIX:
====
The lstat and fstat output of the target files are now
stored which help in determining the identity of the target
files thus preventing the unauthorized access to other
files.
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- mysqladmin is needed by InnoDB Cluster, add tool to docker/minimal package.
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CLIENT (CONTRIBUTION)
DESCRIPTION:
============
Binary data should be printed as hex in the mysql client
when the option binary-as-hex is enabled.
ANALYSIS:
=========
The fix deals only with mysql command line client.
It does not change, at all, the data sent to the
applications. Printing binary data as hex also
allows to use the output in the where clause
of the query.
FIX:
====
A new option 'binary-as-hex' is introduced to print the
binary contents as hex in the mysql client. The option
is disabled by default. When the option is enabled, we
convert the binary data to hex before printing the
contents irrespective of whether it is in tabular,
xml or html format.
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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)
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(cherry picked from commit 7df8dc750c26ead87c643f87dccba28a66cf3c9b)
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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>
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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.
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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.
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Use cmake variable to adjust shebang to platform.
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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.
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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.
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SSL CONNECTION
Changed MYSQL_OPT_SSL_MODE to be the same as in 5.6 (ABI compatibility).
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THREE BYTES ON X86
Post push fix for resolving main.archive test failure in valgrind.
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