This has been back-ported from 6.0 as the problems proved to afflict
5.1 as well.
The fix exposed two new bugs. They were reported as follows.
Bug no 52174: Sometimes wrong plan when reading a MAX value
from non-NULL index
Bug no 52173: Reading NULL value from non-NULL index gives wrong
result in embedded server
Both bugs taken together affect a much smaller class of queries than #47762,
so the fix stays for now.
Optimizer erroneously translated LEFT JOIN into INNER JOIN.
It leads to cutting rows with NULL right side. It happens
because Item_row uses not_null_tables() method form the
base(Item) class and does not calculate 'null tables'
properly. The fix is adding calculation of 'not null tables'
to Item_row.
The crash happens because of discrepancy between values of
conts_tables and join->const_table_map(make_join_statisctics).
Calculation of conts_tables used condition with
HA_STATS_RECORDS_IS_EXACT flag check. Calculation of
join->const_table_map does not use this flag check.
In case of MERGE table without union with index
the table does not become const table and
thus join_read_const_table() is not called
for the table. join->const_table_map supposes
this table is const and later in make_join_select
this table is used for making&calculation const
condition. As table record buffer is not populated
it leads to crash.
The fix is adding a check if an engine supports
HA_STATS_RECORDS_IS_EXACT flag before updating
join->const_table_map.
skipping the following revisions that were merges from branches/zip:
r6543
r6775
------------------------------------------------------------------------
r6749 | vasil | 2010-02-20 18:45:41 +0200 (Sat, 20 Feb 2010) | 5 lines
Changed paths:
M /branches/embedded-1.0/btr/btr0btr.c
M /branches/embedded-1.0/btr/btr0cur.c
M /branches/embedded-1.0/btr/btr0pcur.c
M /branches/embedded-1.0/buf/buf0buf.c
M /branches/embedded-1.0/buf/buf0flu.c
M /branches/embedded-1.0/buf/buf0lru.c
M /branches/embedded-1.0/dict/dict0boot.c
M /branches/embedded-1.0/dict/dict0crea.c
M /branches/embedded-1.0/dict/dict0dict.c
M /branches/embedded-1.0/dict/dict0load.c
M /branches/embedded-1.0/fil/fil0fil.c
M /branches/embedded-1.0/fsp/fsp0fsp.c
M /branches/embedded-1.0/ibuf/ibuf0ibuf.c
M /branches/embedded-1.0/include/btr0btr.h
M /branches/embedded-1.0/include/btr0cur.h
M /branches/embedded-1.0/include/btr0pcur.h
M /branches/embedded-1.0/include/btr0pcur.ic
M /branches/embedded-1.0/include/buf0buf.h
M /branches/embedded-1.0/include/buf0buf.ic
M /branches/embedded-1.0/include/dict0boot.h
M /branches/embedded-1.0/include/fil0fil.h
M /branches/embedded-1.0/include/lock0lock.h
M /branches/embedded-1.0/include/log0log.h
M /branches/embedded-1.0/include/log0log.ic
M /branches/embedded-1.0/include/log0recv.h
M /branches/embedded-1.0/include/mem0dbg.h
M /branches/embedded-1.0/include/mem0dbg.ic
M /branches/embedded-1.0/include/mem0mem.h
M /branches/embedded-1.0/include/mem0mem.ic
M /branches/embedded-1.0/include/os0file.h
M /branches/embedded-1.0/include/os0sync.h
M /branches/embedded-1.0/include/os0sync.ic
M /branches/embedded-1.0/include/os0thread.h
M /branches/embedded-1.0/include/que0que.h
M /branches/embedded-1.0/include/que0que.ic
M /branches/embedded-1.0/include/row0merge.h
M /branches/embedded-1.0/include/row0prebuilt.h
M /branches/embedded-1.0/include/srv0srv.h
M /branches/embedded-1.0/include/sync0sync.h
M /branches/embedded-1.0/include/trx0rseg.h
M /branches/embedded-1.0/include/trx0sys.h
M /branches/embedded-1.0/include/trx0trx.h
M /branches/embedded-1.0/include/trx0types.h
M /branches/embedded-1.0/include/trx0undo.h
M /branches/embedded-1.0/include/trx0xa.h
M /branches/embedded-1.0/include/univ.i
M /branches/embedded-1.0/include/ut0vec.h
M /branches/embedded-1.0/include/ut0vec.ic
M /branches/embedded-1.0/lock/lock0lock.c
M /branches/embedded-1.0/log/log0log.c
M /branches/embedded-1.0/log/log0recv.c
M /branches/embedded-1.0/mem/mem0mem.c
M /branches/embedded-1.0/os/os0file.c
M /branches/embedded-1.0/os/os0thread.c
M /branches/embedded-1.0/page/page0page.c
M /branches/embedded-1.0/rem/rem0rec.c
M /branches/embedded-1.0/row/row0ins.c
M /branches/embedded-1.0/row/row0merge.c
M /branches/embedded-1.0/row/row0prebuilt.c
M /branches/embedded-1.0/row/row0sel.c
M /branches/embedded-1.0/row/row0umod.c
M /branches/embedded-1.0/row/row0undo.c
M /branches/embedded-1.0/row/row0upd.c
M /branches/embedded-1.0/srv/srv0srv.c
M /branches/embedded-1.0/srv/srv0start.c
M /branches/embedded-1.0/sync/sync0sync.c
M /branches/embedded-1.0/trx/trx0sys.c
M /branches/embedded-1.0/trx/trx0trx.c
M /branches/embedded-1.0/trx/trx0undo.c
M /branches/embedded-1.0/ut/ut0mem.c
M /branches/innodb+/btr/btr0btr.c
M /branches/innodb+/btr/btr0cur.c
M /branches/innodb+/btr/btr0pcur.c
M /branches/innodb+/buf/buf0buf.c
M /branches/innodb+/buf/buf0lru.c
M /branches/innodb+/dict/dict0crea.c
M /branches/innodb+/dict/dict0dict.c
M /branches/innodb+/dict/dict0load.c
M /branches/innodb+/handler/ha_innodb.cc
M /branches/innodb+/handler/ha_innodb.h
M /branches/innodb+/handler/handler0alter.cc
M /branches/innodb+/include/btr0btr.h
M /branches/innodb+/include/btr0cur.h
M /branches/innodb+/include/btr0pcur.h
M /branches/innodb+/include/btr0pcur.ic
M /branches/innodb+/include/buf0buf.h
M /branches/innodb+/include/log0log.h
M /branches/innodb+/include/mem0dbg.h
M /branches/innodb+/include/mem0dbg.ic
M /branches/innodb+/include/os0file.h
M /branches/innodb+/include/row0mysql.h
M /branches/innodb+/include/srv0srv.h
M /branches/innodb+/include/sync0sync.h
M /branches/innodb+/include/trx0trx.h
M /branches/innodb+/lock/lock0lock.c
M /branches/innodb+/log/log0log.c
M /branches/innodb+/log/log0recv.c
M /branches/innodb+/mem/mem0dbg.c
M /branches/innodb+/os/os0file.c
M /branches/innodb+/page/page0page.c
M /branches/innodb+/row/row0ins.c
M /branches/innodb+/row/row0mysql.c
M /branches/innodb+/row/row0sel.c
M /branches/innodb+/srv/srv0srv.c
M /branches/innodb+/srv/srv0start.c
M /branches/innodb+/sync/sync0sync.c
M /branches/innodb+_metrics_table/btr/btr0btr.c
M /branches/innodb+_metrics_table/buf/buf0buf.c
M /branches/innodb+_metrics_table/buf/buf0flu.c
M /branches/innodb+_metrics_table/dict/dict0crea.c
M /branches/innodb+_metrics_table/dict/dict0dict.c
M /branches/innodb+_metrics_table/dict/dict0load.c
M /branches/innodb+_metrics_table/handler/ha_innodb.cc
M /branches/innodb+_metrics_table/handler/ha_innodb.h
M /branches/innodb+_metrics_table/handler/handler0alter.cc
M /branches/innodb+_metrics_table/handler/i_s.cc
M /branches/innodb+_metrics_table/handler/i_s.h
M /branches/innodb+_metrics_table/include/mem0dbg.h
M /branches/innodb+_metrics_table/include/mem0dbg.ic
M /branches/innodb+_metrics_table/include/srv0mon.h
M /branches/innodb+_metrics_table/include/srv0mon.ic
M /branches/innodb+_metrics_table/include/srv0srv.h
M /branches/innodb+_metrics_table/lock/lock0lock.c
M /branches/innodb+_metrics_table/log/log0log.c
M /branches/innodb+_metrics_table/mem/mem0dbg.c
M /branches/innodb+_metrics_table/os/os0file.c
M /branches/innodb+_metrics_table/page/page0zip.c
M /branches/innodb+_metrics_table/row/row0mysql.c
M /branches/innodb+_metrics_table/row/row0purge.c
M /branches/innodb+_metrics_table/row/row0sel.c
M /branches/innodb+_metrics_table/srv/srv0mon.c
M /branches/innodb+_metrics_table/srv/srv0srv.c
M /branches/innodb+_metrics_table/sync/sync0sync.c
M /branches/innodb+_metrics_table/trx/trx0roll.c
M /branches/innodb+_metrics_table/trx/trx0trx.c
M /branches/innodb+_persistent_stats/btr/btr0btr.c
M /branches/innodb+_persistent_stats/buf/buf0buf.c
M /branches/innodb+_persistent_stats/data/data0type.c
M /branches/innodb+_persistent_stats/dict/dict0boot.c
M /branches/innodb+_persistent_stats/dict/dict0crea.c
M /branches/innodb+_persistent_stats/dict/dict0dict.c
M /branches/innodb+_persistent_stats/dict/dict0load.c
M /branches/innodb+_persistent_stats/dict/dict0mem.c
M /branches/innodb+_persistent_stats/fil/fil0fil.c
M /branches/innodb+_persistent_stats/fsp/fsp0fsp.c
M /branches/innodb+_persistent_stats/handler/ha_innodb.cc
M /branches/innodb+_persistent_stats/handler/ha_innodb.h
M /branches/innodb+_persistent_stats/handler/handler0alter.cc
M /branches/innodb+_persistent_stats/ibuf/ibuf0ibuf.c
M /branches/innodb+_persistent_stats/include/btr0pcur.h
M /branches/innodb+_persistent_stats/include/btr0pcur.ic
M /branches/innodb+_persistent_stats/include/db0err.h
M /branches/innodb+_persistent_stats/include/dict0dict.h
M /branches/innodb+_persistent_stats/include/dict0mem.h
M /branches/innodb+_persistent_stats/include/ha_prototypes.h
M /branches/innodb+_persistent_stats/include/lock0lock.h
M /branches/innodb+_persistent_stats/include/log0log.h
M /branches/innodb+_persistent_stats/include/log0recv.h
M /branches/innodb+_persistent_stats/include/mem0dbg.h
M /branches/innodb+_persistent_stats/include/mem0dbg.ic
M /branches/innodb+_persistent_stats/include/os0file.h
M /branches/innodb+_persistent_stats/include/pars0pars.h
M /branches/innodb+_persistent_stats/include/srv0srv.h
M /branches/innodb+_persistent_stats/include/sync0sync.h
M /branches/innodb+_persistent_stats/include/trx0sys.h
M /branches/innodb+_persistent_stats/include/trx0trx.h
M /branches/innodb+_persistent_stats/include/ut0lst.h
M /branches/innodb+_persistent_stats/include/ut0ut.h
M /branches/innodb+_persistent_stats/lock/lock0lock.c
M /branches/innodb+_persistent_stats/log/log0log.c
M /branches/innodb+_persistent_stats/log/log0recv.c
M /branches/innodb+_persistent_stats/mem/mem0dbg.c
M /branches/innodb+_persistent_stats/os/os0file.c
M /branches/innodb+_persistent_stats/page/page0page.c
M /branches/innodb+_persistent_stats/pars/pars0pars.c
M /branches/innodb+_persistent_stats/row/row0merge.c
M /branches/innodb+_persistent_stats/row/row0mysql.c
M /branches/innodb+_persistent_stats/row/row0sel.c
M /branches/innodb+_persistent_stats/row/row0umod.c
M /branches/innodb+_persistent_stats/row/row0upd.c
M /branches/innodb+_persistent_stats/srv/srv0srv.c
M /branches/innodb+_persistent_stats/srv/srv0start.c
M /branches/innodb+_persistent_stats/sync/sync0sync.c
M /branches/innodb+_persistent_stats/trx/trx0i_s.c
M /branches/innodb+_persistent_stats/trx/trx0sys.c
M /branches/innodb+_persistent_stats/trx/trx0trx.c
M /branches/innodb+_persistent_stats/ut/ut0ut.c
M /branches/innofts+/handler/ha_innodb.cc
M /branches/innofts+/handler/i_s.cc
M /branches/innofts+/handler/i_s.h
M /branches/innofts+/include/fut0fut.h
M /branches/performance_schema/btr/btr0sea.c
M /branches/performance_schema/buf/buf0buf.c
M /branches/performance_schema/dict/dict0dict.c
M /branches/performance_schema/fil/fil0fil.c
M /branches/performance_schema/handler/ha_innodb.cc
M /branches/performance_schema/include/srv0srv.h
M /branches/performance_schema/include/sync0rw.h
M /branches/performance_schema/include/sync0rw.ic
M /branches/performance_schema/include/sync0sync.h
M /branches/performance_schema/include/sync0sync.ic
M /branches/performance_schema/include/sync0types.h
M /branches/performance_schema/log/log0log.c
M /branches/performance_schema/srv/srv0srv.c
M /branches/performance_schema/sync/sync0rw.c
M /branches/performance_schema/trx/trx0i_s.c
M /branches/performance_schema/trx/trx0purge.c
M /branches/plugin-2.0/buf/buf0buf.c
M /branches/plugin-2.0/buf/buf0lru.c
M /branches/plugin-2.0/dict/dict0boot.c
M /branches/plugin-2.0/dict/dict0crea.c
M /branches/plugin-2.0/dict/dict0dict.c
M /branches/plugin-2.0/dict/dict0load.c
M /branches/plugin-2.0/dict/dict0mem.c
M /branches/plugin-2.0/fil/fil0fil.c
M /branches/plugin-2.0/fsp/fsp0fsp.c
M /branches/plugin-2.0/handler/ha_innodb.cc
M /branches/plugin-2.0/handler/ha_innodb.h
M /branches/plugin-2.0/handler/handler0alter.cc
M /branches/plugin-2.0/ibuf/ibuf0ibuf.c
M /branches/plugin-2.0/include/dict0mem.h
M /branches/plugin-2.0/include/ha_prototypes.h
M /branches/plugin-2.0/include/lock0lock.h
M /branches/plugin-2.0/include/log0log.h
M /branches/plugin-2.0/include/log0recv.h
M /branches/plugin-2.0/include/mem0dbg.h
M /branches/plugin-2.0/include/mem0dbg.ic
M /branches/plugin-2.0/include/os0file.h
M /branches/plugin-2.0/include/row0mysql.h
M /branches/plugin-2.0/include/srv0srv.h
M /branches/plugin-2.0/include/sync0sync.h
M /branches/plugin-2.0/include/trx0sys.h
M /branches/plugin-2.0/include/trx0trx.h
M /branches/plugin-2.0/lock/lock0lock.c
M /branches/plugin-2.0/log/log0log.c
M /branches/plugin-2.0/log/log0recv.c
M /branches/plugin-2.0/mem/mem0dbg.c
M /branches/plugin-2.0/os/os0file.c
M /branches/plugin-2.0/page/page0page.c
M /branches/plugin-2.0/row/row0merge.c
M /branches/plugin-2.0/row/row0mysql.c
M /branches/plugin-2.0/row/row0sel.c
M /branches/plugin-2.0/row/row0umod.c
M /branches/plugin-2.0/row/row0upd.c
M /branches/plugin-2.0/srv/srv0srv.c
M /branches/plugin-2.0/srv/srv0start.c
M /branches/plugin-2.0/sync/sync0sync.c
M /branches/plugin-2.0/trx/trx0i_s.c
M /branches/plugin-2.0/trx/trx0sys.c
M /branches/plugin-2.0/trx/trx0trx.c
M /branches/zip/btr/btr0btr.c
M /branches/zip/btr/btr0cur.c
M /branches/zip/btr/btr0pcur.c
M /branches/zip/buf/buf0buf.c
M /branches/zip/buf/buf0lru.c
M /branches/zip/dict/dict0boot.c
M /branches/zip/dict/dict0crea.c
M /branches/zip/dict/dict0dict.c
M /branches/zip/dict/dict0load.c
M /branches/zip/fsp/fsp0fsp.c
M /branches/zip/handler/ha_innodb.cc
M /branches/zip/handler/ha_innodb.h
M /branches/zip/handler/handler0alter.cc
M /branches/zip/include/btr0btr.h
M /branches/zip/include/btr0cur.h
M /branches/zip/include/btr0pcur.h
M /branches/zip/include/btr0pcur.ic
M /branches/zip/include/buf0buf.h
M /branches/zip/include/dict0boot.h
M /branches/zip/include/fil0fil.h
M /branches/zip/include/log0log.h
M /branches/zip/include/log0log.ic
M /branches/zip/include/log0recv.h
M /branches/zip/include/mem0dbg.h
M /branches/zip/include/mem0dbg.ic
M /branches/zip/include/mem0mem.h
M /branches/zip/include/mem0mem.ic
M /branches/zip/include/os0file.h
M /branches/zip/include/que0que.h
M /branches/zip/include/que0que.ic
M /branches/zip/include/row0mysql.h
M /branches/zip/include/srv0srv.h
M /branches/zip/include/sync0sync.h
M /branches/zip/include/trx0rseg.h
M /branches/zip/include/trx0trx.h
M /branches/zip/include/trx0types.h
M /branches/zip/include/univ.i
M /branches/zip/lock/lock0lock.c
M /branches/zip/log/log0log.c
M /branches/zip/log/log0recv.c
M /branches/zip/mem/mem0dbg.c
M /branches/zip/mem/mem0mem.c
M /branches/zip/os/os0file.c
M /branches/zip/page/page0page.c
M /branches/zip/rem/rem0rec.c
M /branches/zip/row/row0ins.c
M /branches/zip/row/row0merge.c
M /branches/zip/row/row0mysql.c
M /branches/zip/row/row0sel.c
M /branches/zip/row/row0umod.c
M /branches/zip/srv/srv0srv.c
M /branches/zip/srv/srv0start.c
M /branches/zip/sync/sync0sync.c
M /branches/zip/trx/trx0rseg.c
M /branches/zip/trx/trx0trx.c
Non-functional change: update copyright year to 2010 of the files
that have been modified after 2010-01-01 according to svn.
for f in $(svn log -v -r{2010-01-01}:HEAD |grep "^ M " |cut -b 16- |sort -u) ; do sed -i "" -E 's/(Copyright \(c\) [0-9]{4},) [0-9]{4}, (.*Innobase Oy.+All Rights Reserved)/\1 2010, \2/' $f ; done
------------------------------------------------------------------------
r6795 | calvin | 2010-03-11 06:29:35 +0200 (Thu, 11 Mar 2010) | 4 lines
Changed paths:
M /branches/plugin-2.0/CMakeLists.txt
branches/plugin-2.0: take the CMake file from MySQL.
The CMake files are significantly changed in MySQL 5.5
to have cross-platform support.
------------------------------------------------------------------------
r6796 | calvin | 2010-03-11 06:38:24 +0200 (Thu, 11 Mar 2010) | 4 lines
Changed paths:
A /branches/plugin-1.1 (from /branches/plugin-2.0:6795)
D /branches/plugin-2.0
branches/plugin-1.1: Rename the branch from plugin-2.0 to
plugin-1.1, to be used with MySQL 5.5.
------------------------------------------------------------------------
r6797 | calvin | 2010-03-11 06:45:29 +0200 (Thu, 11 Mar 2010) | 4 lines
Changed paths:
M /branches/plugin-1.1/include/univ.i
branches/plugin-1.1: change the version number to 1.1.0.
------------------------------------------------------------------------
All numeric operators and functions on integer, floating point
and DECIMAL values now throw an 'out of range' error rather
than returning an incorrect value or NULL, when the result is
out of supported range for the corresponding data type.
Some test cases in the test suite had to be updated
accordingly either because the test case itself relied on a
value returned in case of a numeric overflow, or because a
numeric overflow was the root cause of the corresponding bugs.
The latter tests are no longer relevant, since the expressions
used to trigger the corresponding bugs are not valid anymore.
However, such test cases have been adjusted and kept "for the
record".
reverse DNS lookup of "localhost" returns "broadcasthost" on Snow Leopard, and NULL on most others.
Simply ignore the output, as this is not an essential part of UDF testing.
Corrected some packaging bugs:
- install mysqlservices library
- install libmysqlclient_r.so.{16,16.0.0} as links
to libmysqlclient.so
- install libmysqld-debug.a
- install my_safe_process, my_safe_kill and
symlinks to mysql-test-run.pl (mtr, mysql-test-run)
into correct place ${INSTALL_MYSQLTESTDIR}
for InnoDB
The class Field_bit_as_char stores the metadata for the
field incorrecly because bytes_in_rec and bit_len are set
to (field_length + 7 ) / 8 and 0 respectively, while
Field_bit has the correct values field_length / 8 and
field_length % 8.
Solved the problem by re-computing the values for the
metadata based on the field_length instead of using the
bytes_in_rec and bit_len variables.
To handle compatibility with old server, a table map
flag was added to indicate that the bit computation is
exact. If the flag is clear, the slave computes the
number of bytes required to store the bit field and
compares that instead, effectively allowing replication
*without conversion* from any field length that require
the same number of bytes to store.
definition at engine
If a single ALTER TABLE contains both DROP INDEX and ADD INDEX using
the same index name (a.k.a. index modification) we need to disable
in-place alter table because we can't ask the storage engine to have
two copies of the index with the same name even temporarily (if we
first do the ADD INDEX and then DROP INDEX) and we can't modify
indexes that are needed by e.g. foreign keys if we first do
DROP INDEX and then ADD INDEX.
Fixed the problem by disabling in-place ALTER TABLE for these cases.
the same way as BTR_INSERT and BTR_DELETE_MARK: only perform (buffer)
the operation when the page is not in the buffer pool.
BTR_INSERT, BTR_DELETE_MARK, BTR_DELETE: Make the documentation say that
these flags are ignored when the page is in the buffer pool.
enum row_search_result: Remove ROW_NOT_DELETED, which
BTR_CUR_DELETE_FAILED was mapped to.
enum btr_cur_method: Remove BTR_CUR_DELETE_FAILED. The
btr_cur_search_to_nth_level() will no longer attempt to execute the
BTR_DELETE when the page is in the buffer pool.
row_search_index_entry(): Remove the mapping from
BTR_CUR_DELETE_FAILED to ROW_NOT_DELETED. The caller will have to
attempt purge when the record is in the buffer pool.
row_purge_remove_sec_if_poss_leaf(): Attempt to purge the record if it
was found in the buffer pool.
This addresses Issue #466.
rb://268
In BUG#49562 we fixed the case where numeric user var events
would not serialize the flag stating whether the value was signed
or unsigned (unsigned_flag). This fixed the case that the slave
would get an overflow while treating the unsigned values as
signed.
In this bug, we find that the unsigned_flag can sometimes change
between the moment that the user value is recorded for binlogging
purposes and the actual binlogging time. Since we take the
unsigned_flag from the runtime variable data, at binlogging time,
and the variable value is comes from the copy taken earlier in
the execution, there may be inconsistency in the
User_var_log_event between the variable value and its
unsigned_flag.
We fix this by also copying the unsigned_flag of the
user_var_entry when its value is copied, for binlogging
purposes. Later, at binlogging time, we use the copied
unsigned_flag and not the one in the runtime user_var_entry
instance.
Non-determinism of the test was caused by lack of setting a proper value to hb period,
actually fixed by BUG@50767.
These fixes aim at possible non-determinism in comparison of received
hb events by master and slave in the circular part of the test.
Even though the HB periods ratio was choosen to be as high as 10, it's still incorrect
to compare number of hb-events basing only a relation between their periods.
Yet another issue is relatively short 60 secs timeout of wait_for_status_var.inc
makes valgrind runs to fail.
Fixed with deploying wait_for_slave_io_to_start afront of calling wait_for_status_var.
The test is made runnable only with MIXED binlog-format as it has close to 1 min
total exec time and there is nothing format specific in it.
DDL no longer aborts mysql_lock_tables(), and hence
we no longer need to support need_reopen flag of this
call.
Remove the flag, and all the code in the server
that was responsible for handling the case when
it was set. This allowed to simplify:
open_and_lock_tables_derived(), the delayed thread,
multi-update.
Rename MYSQL_LOCK_IGNORE_FLUSH to MYSQL_OPEN_IGNORE_FLUSH,
since we now only support this flag in open_table().
Rename MYSQL_LOCK_PERF_SCHEMA to MYSQL_LOCK_LOG_TABLE,
to avoid confusion.
Move the wait for the global read lock for cases
when we do updates in SELECT f1() or DO (UPDATE) to
open_table() from mysql_lock_tables(). When waiting
for the read lock, we could raise need_reopen flag,
which is no longer present in mysql_lock_tables().
Since the block responsible for waiting for GRL
was moved, MYSQL_LOCK_IGNORE_GLOBAL_READ_LOCK
was renamed to MYSQL_OPEN_IGNORE_GLOBAL_READ_LOCK.
This deadlock could occour betweeen one connection executing
SET GLOBAL EVENT_SCHEDULER= ON and another executing SET GLOBAL
EVENT_SCHEDULER= OFF. The bug was introduced by WL#4738.
The first connection would hold LOCK_event_metadata (protecting
the global variable) while trying to lock LOCK_global_system_variables
starting the event scheduler thread (in THD:init()).
The second connection would hold LOCK_global_system_variables
while trying to get LOCK_event_scheduler after stopping the event
scheduler inside event_scheduler_update().
This patch fixes the problem by not using LOCK_event_metadata to
protect the event_scheduler variable. It is still protected using
LOCK_global_system_variables. This fixes the deadlock as it removes
one of the two mutexes used to produce it.
However, this patch opens up the possibility that the event_scheduler
variable and the real event_scheduler state can become out of sync
(e.g. variable = OFF, but scheduler running). But this can only
happen under very unlikely conditions - two concurrent SET GLOBAL
statments, with one thread interrupted at the exact wrong moment.
This is preferable to having the possibility of a deadlock.
This patch also fixes a bug where it was possible to exit create_event()
without releasing LOCK_event_metadata if running out of memory during
its exection.
No test case added since a repeatable test case would have required
excessive use of new sync points. Instead we rely on the fact that
this bug was easily reproduceable using RGQ tests.
When building the script directory using a CMake-based build, both the
variables in config.h.cmake (including PLUGINDIR) and the variables in
CMakeList.txt (which includes pkgplugindir).
However, for autotools-based builds, only pkgplugindir is substituted,
which means that the plugin-path is not substituted.
This patch solves the problem by using pkgplugindir, which works on both
CMake-based and autotools-based builds, instead of PLUGINDIR.
SunStudio
SunStudio compilers of late warn about methods that might hide
methods in base classes due to the use of overloading combined
with overriding. SunStudio also warns about variables defined
in local socpe or method arguments that have the same name as
a member attribute of the class.
This patch renames methods that might hide base class methods,
to make it easier both for humans and compilers to see what is
actually called. It also renames variables in local scope.
which was cloned from branches/zip revision 6237 as branches/plugin-2.0,
in order to work with MySQL 5.5.
Skip revision 6240: update the version number to 2.0.0
------------------------------------------------------------------------
r6290 | calvin | 2009-12-10 02:26:45 -0600 (Thu, 10 Dec 2009) | 26 lines
branches/plugin-2.0: merge of r2877 from MySQL
This is r2877 in mysql-next-mr tree, backported from 6.0.
-------------------------------------------------------------
Bug#24509 - 2048 file descriptor limit on windows needs increasing, also
WL#3049 - improved Windows I/O
The patch replaces the use of the POSIX I/O interfaces in mysys on Windows with
the Win32 API calls (CreateFile, WriteFile, etc). The Windows HANDLE for the open
file is stored in the my_file_info struct, along with a flag for append mode
because the Windows API does not support opening files in append mode in all cases)
The default max open files has been increased to 16384 and can be increased further
by setting --max-open-files=<value> during the server start.
Another major change in this patch that almost all Windows specific file IO code
has been moved to a new file my_winfile.c, greatly reducing the amount of code
in #ifdef blocks within mysys, thus improving readability.
Minor enhancements:
- my_(f)stat() is changed to use __stati64 structure with 64 file size
and timestamps. It will return correct file size now (C runtime implementation
used to report outdated information)
- my_lock on Windows is prepared to handle additional timeout parameter
- after review : changed __WIN__ to _WIN32 in the new and changed code.
------------------------------------------------------------------------
r6291 | calvin | 2009-12-10 02:31:27 -0600 (Thu, 10 Dec 2009) | 14 lines
branches/plugin-2.0: merge of r2887.3.31 from MySQL
This is r2887.3.31 in mysql-next-mr tree, backported from 6.0.
Backport of:
----------------------------------------------------------
revno: 2630.22.8
committer: Konstantin Osipov <konstantin@mysql.com>
branch nick: mysql-6.0-runtime
timestamp: Sun 2008-08-10 18:49:52 +0400
message:
Get rid of typedef struct for the most commonly used types:
TABLE, TABLE_SHARE, LEX. This simplifies use of tags
and forward declarations.
------------------------------------------------------------------------
r6292 | calvin | 2009-12-10 02:40:55 -0600 (Thu, 10 Dec 2009) | 41 lines
branches/plugin-2.0: merge of r2936 from MySQL
This is r2936 in mysql-next-mr tree, backported from 6.0.
Backport of:
-------------------------------------------------------------
revno: 2877
committer: Davi Arnaut <Davi.Arnaut@Sun.COM>
branch nick: 35164-6.0
timestamp: Wed 2008-10-15 19:53:18 -0300
message:
Bug#35164: Large number of invalid pthread_attr_setschedparam calls
Bug#37536: Thread scheduling causes performance degradation at low thread count
Bug#12702: Long queries take 100% of CPU and freeze other applications under Windows
The problem is that although having threads with different priorities
yields marginal improvements [1] in some platforms [2], relying on some
statically defined priorities (QUERY_PRIOR and WAIT_PRIOR) to play well
(or to work at all) with different scheduling practices and disciplines
is, at best, a shot in the dark as the meaning of priority values may
change depending on the scheduling policy set for the process.
Another problem is that increasing priorities can hurt other concurrent
(running on the same hardware) applications (such as AMP) by causing
starvation problems as MySQL threads will successively preempt lower
priority processes. This can be evidenced by Bug#12702.
The solution is to not change the threads priorities and rely on the
system scheduler to perform its job. This also enables a system admin
to increase or decrease the scheduling priority of the MySQL process,
if intended.
Furthermore, the internal wrappers and code for changing the priority
of threads is being removed as they are now unused and ancient.
1. Due to unintentional side effects. On Solaris this could artificially
help benchmarks as calling the priority changing syscall millions of
times is more beneficial than the actual setting of the priority.
2. Where it actually works. It has never worked on Linux as the default
scheduling policy SCHED_OTHER only accepts the static priority 0.
------------------------------------------------------------------------
r6293 | calvin | 2009-12-10 02:45:27 -0600 (Thu, 10 Dec 2009) | 13 lines
branches/plugin-2.0: merge of r2938 from MySQL
This is r2938 in mysql-next-mr tree, backported from 6.0.
Backport of:
----------------------------------------------------------------------
ChangeSet@1.2571, 2008-04-08 12:30:06+02:00, vvaintroub@wva. +122 -0
Bug#32082 : definition of VOID in my_global.h conflicts with Windows
SDK headers
VOID macro is now removed. Its usage is replaced with void cast.
In some cases, where cast does not make much sense (pthread_*, printf,
hash_delete, my_seek), cast is ommited.
------------------------------------------------------------------------
