XID cache is now based on lock-free hash.
Also fixed lf_hash_destroy() to call alloc destructor.
Note that previous implementation had race condition when thread was accessing
XA owned by different thread. This new implementation doesn't fix it either.
Review fixes:
- Coding style
- Fix bad .result file
- Fix test to be tolerant of different timing.
- Fix test to give better info in case of unexpected timing.
Merge from Percona Server enforced use of a specific storage engine
authored by Stewart Smith.
Modified to be session variable and modifiable only by SUPER. Use
similar implementation as default_storage_engine.
fixed embedded server tests
MDEV-7009: SET STATEMENT min_examined_row_limit has no effect
MDEV-6948:SET STATEMENT gtid_domain_id = ... FOR has no effect (same for gtid_seq_no and server_id)
old values of SET STATENENT variables now saved in its own Query_arena and restored later
MASTER_GTID_WAIT function needs some status to evaluate its use.
master_gtid_wait_count indicates how many times the function is called.
master_gtid_wait_time indicates how much time in microseconds occurred
waiting (or timing out)
master_gtid_timeouts indicates how many time times this function timed
out rather than all successful gtids events being available.
INFORMATION_SCHEMA.SYSTEM_VARIABLES.DEFAULT_VALUE had broken values on
big endian.
Default value is internally stored as longlong, while I_S references it's
pointer (longlong *) according to variable type (e.g. int, my_bool, etc). This
works well on little endian, but on big endian we always get 0 for such
variables.
Added a SESSION-only system variable "wsrep_dirty_reads" to allow SELECT
queries to pass even when the node is not prepared to accept queries
(wsrep_ready=OFF). Added a test case.
The code in binlog group commit around wait_for_commit that controls commit
order, did the wakeup of subsequent commits early, as soon as a following
transaction is put into the group commit queue, but before any such commit has
actually taken place. This causes problems with too early wakeup of
transactions that need to wait for prior to commit, but do not take part in
the binlog group commit for one reason or the other.
This patch solves the problem, by moving the wakeup to happen only after the
binlog group commit is completed.
This requires a new solution to ensure that transactions that arrive later
than the leader are still able to participate in group commit. This patch
introduces a flag wait_for_commit::commit_started. When this is set, a waiter
can queue up itself in the group commit queue.
This way, effectively the wait_for_prior_commit() is skipped only for
transactions that participate in group commit, so that skipping the wait is
safe. Other transactions still wait as needed for correctness.
The method subselect_union_engine::no_rows() must take
into account the fact that now unit->fake_select_lex is
NULL for for select_union_direct objects.
* ignore the OPTIMIZER_SWITCH_ENGINE_CONDITION_PUSHDOWN bit
* issue a deprecation warning on 'engine_condition_pushdown=on'
* remove unused remains of the old pre-5.5 engine_condition_pushdown variable
* split my_var class in three - base my_var and two descencants, move
properties into descendants, remove if(), create a virtual method instead
* factor out the common code in the select_var_ident parser rule
Added MAX_STATEMENT_TIME user variable to automaticly kill queries after a given time limit has expired.
- Added timer functions based on pthread_cond_timedwait
- Added kill_handlerton() to signal storage engines about kill/timeout
- Added support for GRANT ... MAX_STATEMENT_TIME=#
- Copy max_statement_time to current user, if stored in mysql.user
- Added status variable max_statement_time_exceeded
- Added KILL_TIMEOUT
- Removed digest hash from performance schema tests as they change all the time.
- Updated test results that changed because of the new user variables or new fields in mysql.user
This functionallity is inspired by work done by Davi Arnaut at twitter.
Test case is copied from Davi's work.
Documentation can be found at
https://kb.askmonty.org/en/how-to-limittimeout-queries/
mysql-test/r/mysqld--help.result:
Updated for new help message
mysql-test/suite/perfschema/r/all_instances.result:
Added new mutex
mysql-test/suite/sys_vars/r/max_statement_time_basic.result:
Added testing of max_statement_time
mysql-test/suite/sys_vars/t/max_statement_time_basic.test:
Added testing of max_statement_time
mysql-test/t/max_statement_time.test:
Added testing of max_statement_time
mysys/CMakeLists.txt:
Added thr_timer
mysys/my_init.c:
mysys/mysys_priv.h:
Added new mutex and condition variables
Added new mutex and condition variables
mysys/thr_timer.c:
Added timer functions based on pthread_cond_timedwait()
This can be compiled with HAVE_TIMER_CREATE to benchmark agains timer_create()/timer_settime()
sql/lex.h:
Added MAX_STATEMENT_TIME
sql/log_event.cc:
Safety fix (timeout should be threated as an interrupted query)
sql/mysqld.cc:
Added support for timers
Added status variable max_statement_time_exceeded
sql/share/errmsg-utf8.txt:
Added ER_QUERY_TIMEOUT
sql/signal_handler.cc:
Added support for KILL_TIMEOUT
sql/sql_acl.cc:
Added support for GRANT ... MAX_STATEMENT_TIME=#
Copy max_statement_time to current user
sql/sql_class.cc:
Added timer functionality to THD.
Added thd_kill_timeout()
sql/sql_class.h:
Added timer functionality to THD.
Added KILL_TIMEOUT
Added max_statement_time variable in similar manner as long_query_time was done.
sql/sql_connect.cc:
Added handling of max_statement_time_exceeded
sql/sql_parse.cc:
Added starting and stopping timers for queries.
sql/sql_show.cc:
Added max_statement_time_exceeded for user/connects status in MariaDB 10.0
sql/sql_yacc.yy:
Added support for GRANT ... MAX_STATEMENT_TIME=# syntax, to be enabled in 10.0
sql/structs.h:
Added max_statement_time user resource
sql/sys_vars.cc:
Added max_statement_time variables
mysql-test/suite/roles/create_and_drop_role_invalid_user_table.test
Removed test as we require all fields in mysql.user table.
scripts/mysql_system_tables.sql
scripts/mysql_system_tables_data.sql
scripts/mysql_system_tables_fix.sql
Updated mysql.user with new max_statement_time field
