locking type of temp table
The problem is that INSERT INTO .. SELECT FROM .. and CREATE
TABLE .. SELECT FROM a temporary table could inadvertently
overwrite the locking type of the temporary table. The lock
type of temporary tables should be a write lock by default.
The solution is to reset the lock type of temporary tables
back to its default value after they are used in a statement.
Execution of queries containing the CASE function of
aggregate function like in "SELECT ... CASE ARGV(...) WHEN ..."
crashed the server.
The CASE function caches pointers to concrete comparison
functions for an each pair of types of CASE-WHERE clause
parameters, i.e. for the "CASE INT_RESULT WHERE REAL_RESULT
THEN ... WHERE DECIMAL_RESULT ... END" function call it
caches comparisons for INT_RESULT with REAL_RESULT and
for INT_RESULT with DECIMAL_RESULT. Usually a result
type is known after a call to the fix_fields function,
however, the setup_copy_fields function call may
wrap aggregate items with Item_copy_string that has
STRING_RESULT result type, so setup_copy_fields may
change argument result types of the CASE function after
call to Item_func_case::fix_fields/fix_length_and_dec.
Then the Item_func_case::find_item function tries to
use comparison function for unexpected pair of the
STRING_RESULT and some other type - that caused
an assertion failure of server crash.
The Item_func_case::fix_length_and_dec function has
been modified to take into account possible STRING_RESULT
result type in the presence of aggregate arguments of
the CASE function.
The problem: data file can not be deleted on win because
there is another opened instance of this file.
Data file might be opened twice, on table opening stage and
during write_row execution. We need to close both instances
to satisfy Win.
Added global status variable 'Queries' which represents
total amount of queries executed by server including
statements executed by SPs.
note: It's old behaviour of 'Questions' variable.
Problem was an errornous date that lead to end partition
was before the start, leading to a crash.
Solution was to check greater or equal instead of only
equal between start and end partition.
NOTE: partitioning pruning handles incorrect dates
differently than index lookup, which can give different
results in a partitioned table versus a non partitioned
table for queries having 'bad' dates in the where clause.
Table could be marked dependent because it is
either 1) an inner table of an outer join, or 2) it is a part of
STRAIGHT_JOIN. In case of STRAIGHT_JOIN table->maybe_null should not
be assigned. The fix is to set st_table::maybe_null to 'true' only
for those tables which are used in outer join.
On Winodws FN_DEVCHAR is ':' symbol.
There is a check in mysql_create_table_no_lock() func
on FN_DEVCHAR presence but this code is obsolete and
unnecessary. So the fix is to remove unnecessary code.
The MONTHNAME/DAYNAME functions
returns binary string, so the LOWER/UPPER functions
are not effective on the result of MONTHNAME/DAYNAME call.
Character set of the MONTHNAME/DAYNAME function
result has been changed to connection character set.
- QUICK_INDEX_MERGE_SELECT deinitializes its rnd_pos() scan when it reaches EOF, but we
need to make the deinitialization in QUICK_INDEX_MERGE_SELECT destructor also. This is because
certain execution strategies can stop scanning without reaching EOF, then then try to do a full
table scan on this table. Failure to deinitialize caused the full scan to use (already empty)
table->sort and produce zero records.
compiled --with-debug, due to bug 39828, "autoinc wraps around when offset and
increment > 1". This change should be reverted when that bug is fixed (and a
a few other minor changes to the test as described in comments).
Static disabled plugins|engines and dynamic plugins which installed but disabled
are not visible in I_S PLUGINS|ENGINES tables because they are not stored into
global plugin array.
The fix: add such plugins|engines to plugin array with PLUGIN_IS_DISABLED status.
I_S.ENGINES 'Transactions', 'XA', 'Savepoints' fields have NULL value in this case.
(server crash)
Altering a table with fulltext index[es] which use
pluggable fulltext parser may cause server crash
in debug builds.
The problem was that ALTER TABLE code wrongly assigned
fulltext parser name.
Also fixed that altering a table with fulltext index[es]
leave stale fulltext parser locks, which prevent
fulltext parsers from being uninstalled after
ALTER TABLE.
A follow-up fix for Bug 38839, which exposed a pre-existing bug in the
autoinc handling.
Detailed revision comments:
r2722 | sunny | 2008-10-04 02:48:04 +0300 (Sat, 04 Oct 2008) | 18 lines
branches/5.1: This bug has always existed but was masked by other errors. The
fix for bug# 38839 triggered this bug. When the offset and increment are > 1
we need to calculate the next value taking into consideration the two
variables. Previously we simply assumed they were 1 particularly offset was
never used. MySQL does its own calculation and that's probably why it seemed
to work in the past. We would return what we thought was the correct next
value and then MySQL would recalculate the actual value from that and return
it to the caller (e.g., handler::write_row()). Several new tests have been
added that try and catch some edge cases. The tests exposed a wrap around
error in MySQL next value calculation which was filed as bug 39828. The tests
will need to be updated once MySQL fix that bug.
One good side effect of this fix is that dict_table_t size has been
reduced by 8 bytes because we have moved the autoinc_increment field to
the row_prebuilt_t structure. See review-board for a detailed discussion.
rb://3
Bug #39438: Testcase for Bug#39436 crashes on 5.1 in fil_space_get_latch
Detailed revision comments:
r2719 | vasil | 2008-10-03 18:17:28 +0300 (Fri, 03 Oct 2008) | 49 lines
branches/5.1:
Fix Bug#39438 Testcase for Bug#39436 crashes on 5.1 in fil_space_get_latch
In ha_innobase::info() - do not try to get the free space for a tablespace
which has been discarded with ALTER TABLE ... DISCARD TABLESPACE or if the
.ibd file is missing for some other reason.
ibd_file_missing and tablespace_discarded are manipulated only in
row_discard_tablespace_for_mysql() and in row_import_tablespace_for_mysql()
and the manipulation is protected/surrounded by
row_mysql_lock_data_dictionary()/row_mysql_unlock_data_dictionary() thus we
do the same in ha_innobase::info() when checking the values of those members
to avoid race conditions. I have tested the code-path with UNIV_DEBUG and
UNIV_SYNC_DEBUG.
rb://20
Reviewed by: Inaam, Calvin
Approved by: Heikki
Bug#38231: Innodb crash in lock_reset_all_on_table() on TRUNCATE + LOCK / UNLOCK
branches/5.1:
Fix Bug#38231 Innodb crash in lock_reset_all_on_table() on TRUNCATE + LOCK / UNLOCK
In TRUNCATE TABLE and discard tablespace: do not remove table-level S
and X locks and do not assert on such locks not being wait locks.
Leave such locks alone.
Approved by: Heikki (rb://14)
Bug #38839: auto increment does not work properly with InnoDB after update
Detailed revision comments:
r2609 | sunny | 2008-08-24 01:19:05 +0300 (Sun, 24 Aug 2008) | 12 lines
branches/5.1: Fix for MySQL Bug#38839. Reset the statement level last
value field in prebuilt. This field tracks the last value in an autoincrement
interval. We use this value to check whether we need to update a table's
AUTOINC counter, if the value written to a table is less than this value
then we avoid updating the table's AUTOINC value in order to reduce
mutex contention. If it's not reset (e.g., after a DELETE statement) then
there is the possibility of missing updates to the table's AUTOINC counter
resulting in a subsequent duplicate row error message under certain
conditions (see the test case for details).
Bug #38839 - auto increment does not work properly with InnoDB after update
Bug #35537: Innodb doesn't increment handler_update and handler_delete
Detailed revision comments:
r2388 | vasil | 2008-03-27 14:02:34 +0200 (Thu, 27 Mar 2008) | 7 lines
branches/5.1:
Swap the order in which mysql_thd, mysql_query_str and *mysql_query_str
are checked for non-NULL.
Suggested by: Marko
r2421 | calvin | 2008-04-24 15:32:30 +0300 (Thu, 24 Apr 2008) | 6 lines
branches/5.1: Fix bug#35537 - Innodb doesn't increment handler_update
and handler_delete
Add the calls to ha_statistic_increment() in ha_innobase::delete_row()
and ha_innobase::update_row().
The test
1. did not verify that CREATE FUNCTION shall fails in a case of active binlog
and @@log_bin_trust_function_creators is zero if there is no DETERMINISTIC qualifier
and super user privilege;
2. contained an explit warning on that CREATE FUNCTION actually succeeded whereas
it was supposed to fail;
3. did not demand the bin-log be set ON even though it has contained the opt file
explictily setting the name for the binlog file.
Fixed 1-3 with modifying the test accordingly.
IF(..., CAST(longtext AS UNSIGNED), signed_val)
(was: LEFT JOIN on inline view crashes server)
Select from a LONGTEXT column wrapped with an expression
like "IF(..., CAST(longtext_column AS UNSIGNED), smth_signed)"
failed an assertion or crashed the server. IFNULL function was
affected too.
LONGTEXT column item has a maximum length of 32^2-1 bytes,
at the same time this is a maximum possible length of any
MySQL item. CAST(longtext_column AS UNSIGNED) returns some
unsigned numeric result of length 32^2-1, so the result of
IF/IFNULL function of this number and some other signed number
will have text length of (32^2-1)+1=32^2 (one byte for the
minus sign) - there is integer overflow, and the length is
equal to zero. That caused assert/crash.
CAST AS UNSIGNED function has been modified to limit maximal
length of resulting number to 67 (maximal length of DECIMAL
and two characters for minus sign and dot).
