It was possible to issue an ALTER TABLE ADD PRIMARY KEY on
an partitioned InnoDB table that failed and crashed the server.
The problem was that it succeeded to create the PK on at least
one partition, and then failed on a subsequent partition, due to
duplicate key violation. Since the partitions that already had added
the PK was not reverted all partitions was not consistent with the
table definition, which caused the crash.
The solution was to add a revert step to ha_partition::add_index()
that dropped the index for the already succeeded partitions, on failure.
by a function and column
The bugreport reveals two different bugs about grouping
on a function:
1) grouping by the TIME_TO_SEC function result caused
a server crash or wrong results and
2) grouping by the function returning a blob caused
an unexpected "Duplicate entry" error and wrong
result.
Details for the 1st bug:
TIME_TO_SEC() returns NULL if its argument is invalid (empty
string for example). Thus its nullability depends not only
on the nullability of its arguments but also on their values.
Fixed by (overoptimistically) setting TIME_TO_SEC() to be
nullable despite the nullability of its arguments.
Details for the 2nd bug:
The server is unable to create indices on blobs without
explicit blob key part length. However, this fact was
ignored for blob function result fields of GROUP BY
intermediate tables.
Fixed by disabling GROUP BY index creation for blob
function result fields like regular blob fields.
Adds deprecation warning for the mysqlbinlog options
--base64-output=always and --base64-output.
A warning is printed when the flags are used,
and also when running mysqlbinlog --help.
The problem was that the warnings risen by a trigger were not cleared upon
successful completion. The warnings should be cleared if the trigger completes
successfully.
The fix is to skip merging warnings into caller's Warning Info for triggers.
main.mysqltest skipped on Windows because a perl intentionally does exit(1)
Use exit(2), as exit(1) on Windows is indistinguishable from failing to
execute perl.
data dictionary confusion
On file systems with case insensitive file names, and
lower_case_table_names set to '2', the server could crash
due to a table definition cache inconsistency. This is
the default setting on MacOSX, but may also be set and
used on MS Windows.
The bug is caused by using two different strategies for
creating the hash key for the table definition cache, resulting
in failure to look up an entry which is present in the cache,
or failure to delete an existing entry. One strategy was to
use the real table name (with case preserved), and the other
to use a normalized table name (i.e a lower case version).
This is manifested in two cases. One is during 'DROP DATABASE',
where all known files are removed. The removal from
the table definition cache is done via a generated list of
TABLE_LIST with keys (wrongly) created using the case preserved
name. The other is during CREATE TABLE, where the cache lookup
is also (wrongly) based on the case preserved name.
The fix was to use only the normalized table name when
creating hash keys.
After the fix for
Bug #55077 Assertion failed: width > 0 && to != ((void *)0), file .\dtoa.c
we no longer try to allocate a string of length 'field_length'
so the asserts are relevant only for ZEROFILL columns.
sql_show.cc during rqg_info_schema test on Windows".
Ensure we do not access freed memory when filling
information_schema.views when one of the views
could not be properly opened.
thd->in_sub_stmt || (thd->state..
OPTIMIZE TABLE is not directly supported by InnoDB. Instead,
recreate and analyze of the table is done. After recreate,
the table is closed and locks are released before the table
is reopened and locks re-acquired for the analyze phase.
This assertion was triggered if OPTIMIZE TABLE failed to
acquire thr_lock locks before starting the analyze phase.
The assertion tests (among other things) that there no
active statement transaction. However, as part of acquiring
the thr_lock lock, external_lock() is called for InnoDB
tables and this causes a statement transaction to be started.
If thr_multi_lock() later fails (e.g. due to timeout),
the failure handling code causes this assert to be triggered.
This patch fixes the problem by doing rollback of the
current statement transaction in case open_ltable (used by
OPTIMIZE TABLE) fails to acquire thr_lock locks.
Test case added to lock_sync.test.
Only wait for a single debug signal at a time as the signal state
is global. Also, do not activate the query cache debug sync points
if the thread has no associated THD session.
Issue an error if user specifies multiple commands to run.
Also there was an unnoticed bug that DO_CHECK was actually 0 which lead
to wrong actions in some cases.
The mysqlcheck.test contained commands with the suspicious meaning
for the above reason. Extra commands removed from there.
per-file commands:
client/mysqlcheck.c
Bug#35269 mysqlcheck behaves different depending on order of parameters
Drop with an error if multiple commands.
mysql-test/r/mysqlcheck.result
Bug#35269 mysqlcheck behaves different depending on order of parameters
result completed.
mysql-test/t/mysqlcheck.test
Bug#35269 mysqlcheck behaves different depending on order of parameters
testcase added.
not-working commands removed from some mysqlcheck calls.
The problem was that threads waiting on the query cache lock
are not easily seen due to the lack of a state indicating that
the thread is waiting on the said lock. This made it difficult
for users to quickly spot (for example, via SHOW PROCESSLIST)
a query cache contention problem.
The solution is to update the thread state when the query cache
lock needs to be acquired. Whenever the lock is to be acquired,
the thread state is updated to "Waiting for query cache lock"
and is reset once the lock is granted or the wait is interrupted.
The intention is to make query cache related hangs more evident.
To further investigate query cache related locking problems, one
may use PERFORMANCE_SCHEMA to track the overhead associated with
the locking bits and determine which particular lock is being a
contention point.
The coalesce function returned DATETIME type due to a DATETIME argument, but
since it's not a date/time function it can't return correct int value for
it. Nevertheless Item_datetime_cache was chosen to cache coalesce's result
and that led to a wrong result.
Now Item_datetime_cache is used only for those function that could return
correct int representation of DATETIME values.
discover its existence".
The problem was that user without any privileges on
routine was able to find out whether it existed or not.
DROP FUNCTION and DROP PROCEDURE statements were
checking if routine being dropped existed and reported
ER_SP_DOES_NOT_EXIST error/warning before checking
if user had enough privileges to drop it.
This patch solves this problem by changing code not to
check if routine exists before checking if user has enough
privileges to drop it. Moreover we no longer perform this
check using a separate call instead we rely on
sp_drop_routine() returning SP_KEY_NOT_FOUND if routine
doesn't exist.
This change also simplifies one of upcoming patches
refactoring global read lock implementation.
The subtime function wasn't able to produce correct int representation of
its result. For constant expressions the Item_datetime_cache is used to
speedup evaluation and Item_datetime_cache expects underlying item to return
correct int representation of DATETIME value. These two factors combined led
to a wrong query result.
Now the Item_func_add_time has function val_datetime which performs the
calculation and saves result into given MYSQL_TIME struct, it also sets
null_value to appropriate value. val_int and val_str member functions
convert the result obtained from val_datetime to int or string respectively
and returns it.
