including the big commit
commit 305130361bf72726de220f3d2b2787395e10be61
Author: Marc Alff <marc.alff@oracle.com>
Date: Tue Feb 10 11:31:32 2015 +0100
WL#8354 BACKPORT DIGEST IMPROVEMENTS TO MYSQL 5.6
(with the following commits) and related changes in sql/
Performance schema tables are local to a server and they should not
be allowed to be executed by the slave from the relay log.
From 5.6.10, P_S events are not written into the binary log.
But prior to that, from mysql 5.5 onwards, P_S events are written
to the binary log by master.
The following are problematic scenarios:
1. Master 5.5 -> Slave 5.5
========================
A) RBR: Slave crashes
B) SBR: P_S statements are replicated.
2.Master 5.5 -> Slave 5.6
========================
A) RBR: SQL thd generates error
B) SBR : P_S statements are replicated
3. 5.5 binlog executed on a server 5.5 using mysqlbinlog|mysql
=================================================================
A) RBR: Server crash (because of BINLOG'... statement)
B) SBR: P_S statements are executed
4. 5.5 binlog executed on server 5.6 using mysqlbinlog|mysql
================================================================
A) RBR: SQL error (because of BINLOG'... statement)
B) SBR: P_S statements are executed.
The generalized behaviour should be:
a) Slave SQL thread should certainly ignore P_S events read from
the relay log.
b) mysqlbinlog|mysql should replay the binlog succesfully.
DESTRUCTED THD OBJ
Prior to fix, function check_performance_schema() could leave
behind stale pointers in thread local storage, for the following keys:
- THR_THD (used by _current_thd)
- THR_MALLOC (used for memory allocation)
This is an unsafe practice, which can potentially cause crashes,
and that can cause other bugs when code is modified during maintenance.
With this fix, thread local storage keys used temporarily within
function check_performance_schema() are cleaned up after use.
MDEV-4425 Regexp enhancements
Adding ${CMAKE_BINARY_DIR}/pcre into search path for *.h files.
Needed for find pcre.h (which is generated from pcre.h.in) when
build directory != source directory.
* update results
* don't force HA_CREATE_DELAY_KEY_WRITE on all temp tables,
(bad for CREATE ... LIKE) instead imply it in myisam/aria
* restore HA_ERR_TABLE_DEF_CHANGED in archive
* increase the default number of rwlock classes in P_S to fit all our rwlocks
includes:
* remove some remnants of "Bug#14521864: MYSQL 5.1 TO 5.5 BUGS PARTITIONING"
* introduce LOCK_share, now LOCK_ha_data is strictly for engines
* rea_create_table() always creates .par file (even in "frm-only" mode)
* fix a 5.6 bug, temp file leak on dummy ALTER TABLE
