the problem is the same as reported in bug#20835,
so the fix is backport of bug#20835 patch.
mysql-test/r/subselect.result:
test result
mysql-test/t/subselect.test:
test case
returns truncated results
Problem: performig conversion from {INT, DECIMAL, REAL} to CHAR
we incorrectly set its max length in some cases that may lead
to truncated results returned.
Fix: properly set CONVERT({INT, DECIMAL, REAL}, CHAR) result's
max length.
mysql-test/r/ctype_utf8.result:
Fix for bug#36772: When using UTF8, CONVERT with GROUP BY
returns truncated results
- test result.
mysql-test/t/ctype_utf8.test:
Fix for bug#36772: When using UTF8, CONVERT with GROUP BY
returns truncated results
- test case.
sql/item_timefunc.cc:
Fix for bug#36772: When using UTF8, CONVERT with GROUP BY
returns truncated results
- calculating Item_char_typecast::max_length use initial
argument's charset mbmaxlen instead of from_cs->mbmaxlen,
as from_cs may differ in some case (see comment above).
variable settings (rpl_sys)
Problem: under certain conditions (e.g. user variables usage in triggers)
accessing a user defined variable we may use a variables hash table that
belongs to already deleted thread. It happens if
thd= new THD;
has the same address as just deleted thd as we use
if (stored_thd == thd)
to check.
That may lead to unpredictable results, server crash etc.
Fix: use thread_id instead of thd address to distinguish threads.
Note: no simple and repeatable test case.
sql/item_func.cc:
Fix for bug#40770: Server Crash when running with triggers including
variable settings (rpl_sys)
- store and use thd->thread_id to distinguish threads instead of
thread address as it may be the same as just deleted thread had,
i.e. we may get (old_thd == new_thd) after
delete old_thd;
new_thd= new THD;
- set entry_thread_id only when we get a real entry, clear it
if the hash search fails.
sql/item_func.h:
Fix for bug#40770: Server Crash when running with triggers including
variable settings (rpl_sys)
- Item_func_set_user_var::entry_thread_id introduced.
Problem: memory leak occurs when we open a federated table
that has its share in the hash.
Fix: free not used memory.
Note: the fix should NOT be merged to 5.1 (the code changed).
sql/ha_federated.cc:
Fix for bug#40875: Memory leak in FEDERATED handler
- free memory (tmp_share.scheme) allocated in the parse_url()
if it isn't used anymore.
set but is ignored".
This patch makes @@session.max_allowed_packed and
@@session.net_buffer_length read-only as suggested in the bug
report. The user will have to use SET GLOBAL (and reconnect)
to alter the session values of these variables.
The error string ER_VARIABLE_IS_READONLY is introduced.
Tests are modified accordingly.
sql/set_var.cc:
The class sys_var_thd_ulong_session_readonly is introduced as
a specialization of sys_var_thd_ulong implementing a read-only
session variable. The class overrides check() and
check_default() to achieve the read-only property for the
session part of the variable.
sql/set_var.h:
The class sys_var_thd_ulong_session_readonly is introduced as
a specialization of sys_var_thd_ulong implementing a read-only
session variable. The class overrides check() and
check_default() to achieve the read-only property for the
session part of the variable.
sql/share/errmsg.txt:
New error ER_VARIABLE_IS_READONLY.
Cache size is truncated via 32bit ulong in ha_init_key_cache() and
ha_resize_key_cache()
This change fixes the cast to size_t instead of ulong. This cast is safe,
because key_buffer_size parameter is limited to SIZE_T_MAX
That's a Win-specific error.
When we create libmysqld.dll we have many libraries like mysys, dbug,
strings, etc linked into that dll, so the application built upon
this library shouldn't link these libraries to itself, rather use
those inside the dll.
Fixed by redirecting calls into the libmysqld.dll
per-file comments:
dbug/dbug.c
Bug#38293 Libmysqld crash in mysql_library_init if language file missing
fake _db_something definitions added
include/my_dbug.h
Bug#38293 Libmysqld crash in mysql_library_init if language file missing
fake _db_something declarations added
libmysqld/examples/CMakeLists.txt
Bug#38293 Libmysqld crash in mysql_library_init if language file missing
superfluous libraries removed from linking
libmysqld/libmysqld.def
Bug#38293 Libmysqld crash in mysql_library_init if language file missing
set of mysys functions added to the export section
Item_func_div didn't calculate the precision of the result properly.
The result of 5/0.0001 is 5000 so we have to add decimals of the divisor
to the planned precision.
per-file comments:
mysql-test/r/type_newdecimal.result
Bug#31616 div_precision_increment description looks wrong
test result fixed
mysql-test/t/type_newdecimal.test
Bug#31616 div_precision_increment description looks wrong
test case
sql/item_func.cc
Bug#31616 div_precision_increment description looks wrong
precision must be increased with args[1]->decimals parameter
The function thd_security_context allocates memory on an unprotected MEM_ROOT if the
message length becomes longer than requested and the initial buffer memory needs to
be reallocated.
This patch fixes the design error by copying parts of the reallocated buffer
to the destination buffer. This works because the destination buffer isn't
owned by the String object and thus isn't freed when a new buffer is allocated.
Any new memory allocated by the String object is reclaimed when the object
is destroyed at the end of the function call.
sql_view.cc: required_view_parameters has been decreased by 2
(not by 1) because its value was incorrect: 16 instead of 15
(minor performance issue).
sql/sql_view.cc:
sql_view.cc: required_view_parameters has been decreased by 2
(not by 1) because its value was incorrect: 16 instead of 15
(minor performance issue).
missing after downgrade
Obsolete arc/ directory and view .frm file backup support
has been removed by the patch for bug 17823. However, that
bugfix caused a problem with "live downgrades" of the
server: if we rename some view 4 times under 5.1.29/5.0.72
and then try to rename it under 5.1.28/5.0.70 on the same
database, the server fails with a error:
query 'RENAME TABLE ... TO ...' failed: 6: Error on
delete of '....frm-0001' (Errcode: 2)
Also .frm file of that view may be lost (renamed to .frm~).
The server failed because it tried to rename latest 3
backup .frm files renaming the view: the server used an
integer value of the "revision" field of .frm file to
extract those file names. After the fix for bug 17823 those
files were not created/maintained any more, however the
"revision" field was incremented as usual. So, the server
failed renaming non existent files.
This fix solves the problem by removing the support for
"revision" .frm file field:
1. New server silently ignores existent "revision" fields
in old .frm files and never write it down;
2. Old server assumes, that missing "revision" field in new
.frm files means default value of 0.
3. Accordingly to the fix for bug 17823 the new server
drops arc/ directory on alter/rename view, so after
"live downgrade" old server begins maintenance of the
arc/ directory from scratch without conflicts with .frm
files.
sql/parse_file.cc:
Bug #40021: Renaming view fails, archived .frm for view is
missing after downgrade
1. static write_parameter(): the old_version parameter
and the section for FILE_OPTIONS_REV have been re moved.
2. write_parameter(): the max_versions parameter has been
removed;
3. sql_create_definition_file(): removal of dead code;
4. rename_in_schema_file(): revision and num_view_backups
parameters and dead code have been removed;
5. File_parser::parse(): FILE_OPTIONS_REV section has been
removed.
sql/parse_file.h:
Bug #40021: Renaming view fails, archived .frm for view is
missing after downgrade
1. The FILE_OPTIONS_REV constant has been removed.
2. sql_create_definition_file and rename_in_schema_file
functions: obsolete versions, revision and
num_view_backups parameters have been removed.
sql/sql_db.cc:
Bug #40021: Renaming view fails, archived .frm for view is
missing after downgrade
Commentary update.
sql/sql_trigger.cc:
Bug #40021: Renaming view fails, archived .frm for view is
missing after downgrade
sql_create_definition_file() calls have been updates to
new parameter lists.
sql/sql_view.cc:
Bug #40021: Renaming view fails, archived .frm for view is
missing after downgrade
1. The mysql_create_view function code is used for both
CREATE VIEW and ALTER queries, but query cache is
necessary for ALTER command only. Check for a non first
view revision has been replaced with a direct check for
ALTER query.
2. The num_view_backups global constant has been removed.
3. view_parameters: the "revision" .frm field support has
been removed.
4. sql_create_definition_file and rename_in_schema_file
function calls have been updates to new parameter lists.
sql/table.h:
Bug #40021: Renaming view fails, archived .frm for view is
missing after downgrade
TABLE_LIST: the revision field has been removed.
status
The problem appears to be a race condition, when service is being
stopped right after startup. We set the service status to SERVICE_RUNNING
way too early it cannot yet handle stop requests - initialization has
not finished and hEventShutdown that signals server to stop is not yet
created. If somebody issues "net stop MySQL" at this time, MySQL is not
informed about the stop and continues to run as usual, while
NTService::ServiceMain() stucks forever waiting for mysql's "main" thread
to finish.
Solution is to remain in SERVICE_START_PENDING status until after server
initialization is fully complete and only then change the status to
SERVICE_RUNNING. In SERVICE_START_PENDING we do not accept service control
requests, i.e it is not possible to stop service in that time.
sql/mysqld.cc:
Set service status to running after all initialization is complete
sql/nt_servc.cc:
New method SetRunning() to be called by application
to set service status to SERVICE_RUNNING when apllication
has finished initialization.
sql/nt_servc.h:
New method SetRunning() to be called by application
when initialization completes
issue 'The storage engine for the table doesn't support check' note for I_S tables
mysql-test/r/mysqlcheck.result:
test result
mysql-test/t/mysqlcheck.test:
test case
sql/sql_table.cc:
issue 'The storage engine for the table doesn't support check' note for I_S tables
table->partition_info is unitialized when we open frm file only.
The fix is check share->partition_info_len which is set on
frm opening stage.
mysql-test/r/information_schema_part.result:
test result
mysql-test/t/information_schema_part.test:
test case
sql/sql_show.cc:
table->partition_info is unitialized when we open frm file only.
The fix is check share->partition_info_len which is set on
frm opening stage.
VARIABLE_VALUE field is decreased to 1024 symbols.
(affected I_S tables: GLOBAL_VARIABLES, SESSION_VARIABLES,
GLOBAL_STATUS, SESSION_STATUS).
The only variable which can be longer than 1024 is
init_connect. The variable will be truncated with warning.
Additional fix:
Added where condition filter which speed up queries which
have where condition with expressions which use VARIABLE_NAME
field.
mysql-test/r/information_schema.result:
test result
mysql-test/r/show_check.result:
result fix
mysql-test/suite/funcs_1/r/is_columns_is.result:
result fix
mysql-test/t/information_schema.test:
test case
sql/sql_show.cc:
VARIABLE_VALUE field is decreased to 1024 symbols.
(affected I_S tables: GLOBAL_VARIABLES, SESSION_VARIABLES,
GLOBAL_STATUS, SESSION_STATUS).
The only variable which can be longer than 1024 is
init_connect. The variable will be truncated with warning.
Additional fix:
Added where condition filter which speed up queries which
have where condition with expressions which use VARIABLE_NAME
field.
changed 'charset', 'collation' field length from 64 to MY_CS_NAME_SIZE(32)
in tables:
SCHEMATA, TABLES, COLUMNS, CHARACTER_SETS,
COLLATIONS, COLLATION_CHARACTER_SET_APPLICABILITY
mysql-test/r/create.result:
result fix
mysql-test/r/information_schema.result:
result fix
mysql-test/r/show_check.result:
result fix
mysql-test/suite/funcs_1/r/is_character_sets.result:
result fix
mysql-test/suite/funcs_1/r/is_collation_character_set_applicability.result:
result fix
mysql-test/suite/funcs_1/r/is_collations.result:
result fix
mysql-test/suite/funcs_1/r/is_columns.result:
result fix
mysql-test/suite/funcs_1/r/is_columns_is.result:
result fix
mysql-test/suite/funcs_1/r/is_routines.result:
result fix
mysql-test/suite/funcs_1/r/is_schemata.result:
result fix
mysql-test/suite/funcs_1/r/is_tables.result:
result fix
sql/sql_show.cc:
changed 'charset', 'collation' field length from 64 to MY_CS_NAME_SIZE(32)
in tables:
SCHEMATA, TABLES, COLUMNS, CHARACTER_SETS,
COLLATIONS, COLLATION_CHARACTER_SET_APPLICABILITY
additional fix: ROUTINES.SQL_MODE is changed to be VARCHAR(addon for Bug#29153)
With fix for bug 25951 index hints are ignored for fulltext
searches, as handling of fulltext indexes is different from
handling regular indexes. Meaning it is not possible to
implement true index hints support for fulltext indexes within
the scope of current fulltext architecture.
The problem is that prior to fix for bug 25951, some useful
index hints still could be given for boolean mode searches.
This patch implements special index hints support for fulltext
indexes with the following characteristics:
- all index hints are still ignored for NLQ mode searches -
it cannot work without an index;
- for 5.1 and up index hints FOR ORDER BY and FOR GROUP BY are
still ignored for fulltext indexes;
- boolean mode searches honor USE/FORCE/IGNORE INDEX hints;
- as opposed to index hints for regular indexes, index hints
for fulltext BOOLEAN mode searches affect the usage of the
index for the whole query.
mysql-test/r/fulltext.result:
A test case for BUG#38842.
mysql-test/t/fulltext.test:
A test case for BUG#38842.
sql/item_func.cc:
For boolean mode searches, which can work without fulltext
index, use keys_in_use_for_query bitmap instead of keys_in_use.
The effect is that boolean mode searches now honor index hints.
on tables with partitions
Problem was that the handler function try_semi_consistent_read
was not propagated to the innodb handler.
Solution was to implement that function in the partitioning
handler.
mysql-test/r/partition_innodb.result:
Bug#40595: Non-matching rows not released with READ-COMMITTED
on tables with partitions
Updated test result.
mysql-test/t/partition_innodb.test:
Bug#40595: Non-matching rows not released with READ-COMMITTED
on tables with partitions
Added test case for bug#40595.
Note: the replace_regex is taking long time. I have not found
any better regex (it takes time using 'sed' too).
sql/ha_partition.cc:
Bug#40595: Non-matching rows not released with READ-COMMITTED
on tables with partitions
Added function to the partitioning handler for handling
semi consistent reads (unlock_row was already implemented,
and this is needed for unlock_row to work properly in innodb).
It uses pruning for optimizing the call.
sql/ha_partition.h:
Bug#40595: Non-matching rows not released with READ-COMMITTED
on tables with partitions
Added function to the partitioning handler for handling
semi consistent reads (unlock_row was already implemented,
and this is needed for unlock_row to work properly in innodb).
Innodb monitor could cause a server crash because of invalid access to a
shared variable in a concurrent environment.
This patch adds a guard to protect against crashes but not against
inconsistent values because of performance reasons.
sql/sql_class.cc:
* Attempt snapshot of static memory pointer proc_info to avoid null pointers.
The convert_constant_item function converts a constant to integer using
field for condition like 'field = a_constant'. In some cases the
convert_constant_item is called for a subquery when outer select is already
being executed, so convert_constant_item saves field's value to prevent its
corruption. For EXPLAIN and at the prepare phase field's value isn't
initialized yet, thus when convert_constant_item tries to restore saved
value it fails assertion.
Now the convert_constant_item doesn't save/restore field's value if it's
haven't been read yet. Outer constant values are always saved.
mysql-test/r/explain.result:
Added a test case for the bug#37870.
mysql-test/t/explain.test:
Added a test case for the bug#37870.
sql/item_cmpfunc.cc:
Bug#37870: Usage of uninitialized value caused failed assertion.
Now the convert_constant_item doesn't save/restore field's value if it's
haven't been read yet. Outer constant values are always saved.
order by
Problem was that the first index read was unordered,
and the next was ordered, resulting in use of
uninitialized data.
Solution was to use the correct variable to see if
the 'next' call should be ordered or not.
mysql-test/r/partition.result:
Bug#40494: MYSQL server crashes on range access with
partitioning and order by
Added test case for the bug.
mysql-test/t/partition.test:
Bug#40494: MYSQL server crashes on range access with
partitioning and order by
Added test case for the bug.
sql/ha_partition.cc:
Bug#40494: MYSQL server crashes on range access with
partitioning and order by
Used the wrong variable to decide to continue with
ordered or unordered scan.
