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WITH A VARIABLE AND ORDER BY
Bug#16035412 MYSQL SERVER 5.5.29 WRONG SORTING USING COMPLEX INDEX
This is a fix for a regression introduced by Bug#12667154:
Bug#12667154 attempted to fix a performance problem with subqueries
that did filesort. For doing filesort, the optimizer creates a quick
select object to use when building the sort index. This quick select
object was deleted after the first call to create_sort_index(). Thus,
for queries where the subquery was executed multiple times, the quick
object was only used for the first execution. For all later executions
of the subquery, filesort used a complete table scan for building the
sort index. The fix for Bug#12667154 tried to fix this by not deleting
the quick object after the first execution of create_sort_index() so
that it would be re-used for building the sort index by the following
executions of the subquery.
This regression introduced in Bug#12667154 is that due to not deleting
the quick select object after building the sort index, the quick
object could in some cases be used also during the second phase of the
execution of the subquery instead of using the created sort
index. This caused wrong results to be returned.
The fix for this issue is to delete the reference to the select object
after it has been used in create_sort_index(). In this way the select
and quick objects will not be available when doing the second phase
of the execution of the select operation. To ensure that the select
object can be re-used for the following executions of the subquery
we make a copy of the select pointer. This is used for restoring the
select object after the select operation is completed.
mysql-test/suite/innodb/r/innodb_mysql.result:
Changed explain output: The explain now contains "Using where" since we
have restored the select pointer after doing the filesort operation.
sql/sql_select.cc:
Change create_sort_index() so that it always sets the pointer to
the select object to NULL. This is done in order to avoid that the
select->quick object can be used when execution the main part of
the select operation.
sql/sql_select.h:
New member in JOIN_TAB: saved_select. Used by create_sort_index to
make a backup copy of the select pointer.
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Before this fix, configuring the server with:
- performance_schema_events_waits_history_size=0
- performance_schema_events_waits_history_long_size=0
could cause a crash in the performance schema.
These settings to 0 are intended to be valid and supported,
and are in fact working properly in mysql 5.6 and up already.
This fix backports the code fix and test cases from mysql 5.6
to the mysql 5.5 release.
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Problem:
Before the ALTER TABLE statement, the array
dict_index_t::stat_n_diff_key_vals had proper values calculated
and updated. But after the ALTER TABLE statement, all the values
of this array is 0.
Because of this statistics returned by innodb_rec_per_key() is
different before and after the ALTER TABLE statement. Running the
ANALYZE TABLE command populates the statistics correctly.
Solution:
After ALTER TABLE statement, set the flag dict_table_t::stat_initialized
correctly so that the table statistics will be recalculated properly when
the table is next loaded. But note that we still don't choose the loose
index scans. This fix only ensures that an ALTER TABLE does not change
the optimizer plan.
rb://1639 approved by Marko and Jimmy.
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patch to fix post push falures in pb2
bzr merge 5.1->5.5
BUG#15872504 - REMOVE MYSQL-TEST/INCLUDE/GET_BINLOG_DUMP_THREAD_ID.INC
bzr merge 5.1->5.6
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patch to fix post push falures in pb2
BUG#15872504 - REMOVE MYSQL-TEST/INCLUDE/GET_BINLOG_DUMP_THREAD_ID.INC
=== Problem ===
The file named "mysql-test/include/get_binlog_dump_thread_id.inc" is not
used anywhere. In any case, this file does wrong things in the wrong way:
1) The file seems to assume there is only one dump thread, but there may
be many.
2) you can get this information in a much easier way using the command:
"select thread_id from threads where processlist_command="Binlog Dump";"
=== Fix ===
removed file 'mysql-test/include/get_binlog_dump_thread_id.inc'
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RPL_ROW_UNTIL TIMES OUT
patch to fix post push falures in pb2
mysql-test/suite/rpl/r/rpl_row_until.result:
changes to account for the changes made in
corresponding test file.
mysql-test/suite/rpl/t/disabled.def:
disabled test in macosx
mysql-test/suite/rpl/t/rpl_row_until.test:
replaced static relayy log file by an mtr variable
which saves the name of relay log file.
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STDERR
Fix: Added a destination file to mysqldump.
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bzr merge 5.1->5.5
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=== Problem ===
The test is dependent on binlog positions and checks
to see if the command 'START SLAVE' functions correctly
with the 'UNTIL' clause added to it. The 'UNTIL' clause
is added to specify that the slave should start and run
until the SQL thread reaches a given point in the master
binary log or in the slave relay log.
The test uses hard coded values for MASTER_LOG_POS and
RELAY_LOG_POS, instead of extracting it using
query_get_value() function. There is a test
'rpl.rpl_row_until' which does the similar thing but uses
query_get_value() function to set the values of
MASTER_LOG_POS/ RELAY_LOG_POS. To be precise,
rpl.rpl_row_until is a modified version of
engines/func.rpl_row_until.test.
The use of hard coded values may lead the slave to stop at a position
which may differ from the expected position in the binlog file,
an example being the failure of engines/funcs.rpl_row_until in
mysql-5.1 given as:
"query 'select * from t2' failed. Table 'test.t2' doesn't exist".
In this case, the slave actually ran a couple of extra commands
as a result of which the slave first deleted the table and then
ran a select query on table, leading to the above mentioned failure.
=== Fix ===
1) Fixed the code for failure seen in rpl.rpl_row_until.
This test was also failing although the symptoms of
failure were different.
2) Copied the contents from rpl.rpl_row_until into
into engines/funcs.rpl.rpl_row_until.
3) Updated engines/funcs.rpl_row_until.result accordingly.
mysql-test/suite/engines/funcs/r/rpl_row_until.result:
modified to accomodate the changes in corresponding
test file.
mysql-test/suite/engines/funcs/t/disabled.def:
removed from the list of disabled tests.
mysql-test/suite/engines/funcs/t/rpl_row_until.test:
fixed rpl.rpl_row_until and copied its content to
engines/funcs.rpl_row_until. The reason being both
are same tests but rpl.rpl_row_until is an
updated version.
mysql-test/suite/rpl/t/disabled.def:
removed from the list of disabled tests.
sql/sql_repl.cc:
Added a check to catch an improper combination
of arguements passed to 'START SLAVE UNTIL'. Earlier,
START SLAVE UNTIL MASTER_LOG_FILE='master-bin.000001',
MASTER_LOG_POS=561, RELAY_LOG_POS=12;
passed. It is now detected and an error is reported.
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RPL_ROTATE_LOGS has been failing sporadically in what seems a
problem related to routines that update the coordinates. However,
the test lacks proper assert statments and because of this the
debug information upon failure simply points to the content
mismatch between the test and the result file.
Not as a solution, but as a improvement to the test to better
debug this failure, new assert statments were added to the test.
@rpl_rotate_logs.test
Added new assert statments reducing the
dependency on the result file.
@rpl_rotate_logs.result
Added new content to the result file to
match the test changes
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Problem: The problem with the test is that the slave returns
from start_slave.inc call too early before the list
is actually actualised. This caused the slave stale
data to be reported.
Fix: Added a wait in the test till the slave's IO status is
changed to "Waiting for master to send event" which
which ensures the list is correctly updated.
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DURING A DELETE OPERATION
The converted implicit lock should wait for the prior conflicting lock if found.
rb://1437 approved by Marko
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SIGSTOP/SIGCONT
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When a binlog is replayed into a server, e.g.:
$ mysqlbinlog binlog.000001 | mysql
it sets a pseudo slave mode on the client connection in order to server
be able to read binlog events, there is, a format description event is
needed to correctly read following events.
Also this pseudo slave mode applies to the current connection
replication rules that are needed to correctly apply binlog events.
If a binlog dump is sourced on a connection, this pseudo slave mode will
remains after it, what will apply unexpected rules from customer
perspective to following commands.
Added a new SET statement to binlog dump that will unset pseudo slave
mode at the end of dump file.
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OF MTR
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MYSQLDUMP OUTPUT
A patch is pushed on this bug. A result mismatch
occured for the test main.ddl_i18n_utf8 in
x86_64 gcov build of linux in pb2. This commit is
to modify ddl_i18n_utf8.result to match the
changes made for the bug.
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MYSQLDUMP OUTPUT
A patch is pushed on this bug. A result mismatch
occured for the test main.ddl_i18n_koi8r in
x86_64 gcov build of linux in pb2. This commit is
to modify ddl_i18n_koi8r.result to match the
changes made for the bug.
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MYSQLDUMP OUTPUT
Problem: mysqldump when used with option --routines, dumps
all the routines of the specified database into
output. The statements in this output are written
in such a way that they are version safe using C
style version commenting (of the format
/*!<version num> <sql statement>*/). If a semicolon
is present right before closing of the comment in
dump output, it results in a syntax error while
importing.
Solution: Version comments for dumped routines are
specifically to protect the ones older than 5.0.
When the import is done on 5.0 or later versions,
entire create statement gets executed as all the
check conditions at the beginning of the comments
are cleared. Since the trade off is between the
performance of newer versions which are more in
use and protection of very old versions which are
no longer supported, it is proposed that these
comments be removed altogether to maintain
stability of the versions supported.
client/mysqldump.c:
Bug#14463669 FAILURE TO CORRECTLY PARSE ROUTINES IN
MYSQLDUMP OUTPUT
Output of mysqldump is derived by getting the queries from
show create and appending version comments to them.
query_str is the variable used to store the final string.
Since it is no longer required, its declaration and
manipulations made on it are deleted. At the step where
output is printed, query_str is replaced with the original
query string derived from 'show create'.
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This bug is fixed by Bug#14251529. Only testcase from the
contribution is used.
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- no need to use --skip-ndb in collections files anymore, since long but
more clear logic after recent mtr.pl fixes. ndb tests are never run in MySQL Server
unless explicitly requested
- remove sys_vars.ndb_log_update_as_write_basic.test and sys_vars.ndb_log_updated_only_basic.result since MySQL Server does not have those
options.
- Only sys_vars.have_ndbcluster_basic left since MySQL Server has that variable hardcoded.
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rb://1411 approved by Marko
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- remove unused hack to turn on extra suites based on current directory name
- remove 4 your old debug printout of "vardir: <dir>"
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- improve the logic that decides when ndbcluster should be enabled and the extra
test suites for MySQL Cluster should be added. Should be consistent and logical now ;)
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from MySQL 5.6 into MySQL 5.5
Will close Bug#14515889 BACKPORT OF INNODB DEADLOCK LOGGING TO 5.5
The original implementation is in
vasil.dimov@oracle.com-20101213120811-k2ldtnao2t6zrxfn
Approved by: Jimmy (rb:1535)
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BTR_LIFT_PAGE_UP()
btr_lift_page_up() writes wrong page number (different by -1) for upper than father page.
But in almost all of the cases, the father page should be root page, no upper
pages. It is very rare path.
In addition the leaf page should not be lifted unless the father page is root.
Because the branch pages should not become the leaf pages.
rb://1336 approved by Marko Makela.
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BTR_LIFT_PAGE_UP()
btr_lift_page_up() writes wrong page number (different by -1) for upper than father page.
But in almost all of the cases, the father page should be root page, no upper
pages. It is very rare path.
In addition the leaf page should not be lifted unless the father page is root.
Because the branch pages should not become the leaf pages.
rb://1336 approved by Marko Makela.
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Follow up patch to address the pb2 failures.
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Follow up patch to address the pb2 failures.
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Checks added to return and error when inappropriate
geometry type is stored in a field.
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MDEV-11 - Modifed tests and result files to use explicit column lists
in INSERT and SELECT statements
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backports
from MariaDB 10.0.
The bug in mdev-3948 was an instance of the problem fixed by Sergey's patch
in 10.0 - namely that the range optimizer could change table->[read | write]_set,
and not restore it.
revno: 3471
committer: Sergey Petrunya <psergey@askmonty.org>
branch nick: 10.0-serg-fix-imerge
timestamp: Sat 2012-11-03 12:24:36 +0400
message:
# MDEV-3817: Wrong result with index_merge+index_merge_intersection, InnoDB table, join, AND and OR conditions
Reconcile the fixes from:
#
# guilhem.bichot@oracle.com-20110805143029-ywrzuz15uzgontr0
# Fix for BUG#12698916 - "JOIN QUERY GIVES WRONG RESULT AT 2ND EXEC. OR
# AFTER FLUSH TABLES [-INT VS NULL]"
#
# guilhem.bichot@oracle.com-20111209150650-tzx3ldzxe1yfwji6
# Fix for BUG#12912171 - ASSERTION FAILED: QUICK->HEAD->READ_SET == SAVE_READ_SET
# and
#
and related fixes from: BUG#1006164, MDEV-376:
Now, ROR-merged QUICK_RANGE_SELECT objects make no assumptions about the values
of table->read_set and table->write_set.
Each QUICK_ROR_SELECT has (and had before) its own column bitmap, but now, all
QUICK_ROR_SELECT's functions that care: reset(), init_ror_merged_scan(), and
get_next() will set table->read_set when invoked and restore it back to what
it was before the call before they return.
This allows to avoid the mess when somebody else modifies table->read_set for
some reason.
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executing a query from MyISAM table
don't write a key value into the record buffer - a key length can be larger then the record length.
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