Bug#39848 events_bugs fails sporadically on pushbuild
(missing rows in table event_log)
Details: Reimplement the subtest for BUG 28924
- check if the number of rows within the table
event_log changes but don't print rows
because the number varies depending on
load on testing box
- shift DROP USER befor DROP EVENT
= Subtest fits again to old bug
- remove no more needed comments + variables
Bug#39863 events_bugs fails sporadically on pushbuild
(extra processes in I_S.PROCESSLIST)
Details: Abort with appropriate message to the protocol if
release_lock() does not has the intended effect.
This cannot prevent problems caused by the probably
buggy release_lock() but it reveals if we had a
problem in this area.
Bug#39978 main.events_bugs does not clean up
Detail: Restore global.event_scheduler = ON at end of test
Bug#39569 events_bugs fails sporadically on pushbuild
(should have failed with errno 1539)
Detail: Set $wait_timeout to 4 instead of 2
- Fix two instabilities (result sets pulled from processlist in
subtest for bug 16407) which were found during tests with high
parallel I/O load
- Minor improvements of formatting
Details:
- Add comments
- Remove tabs and trailing blanks
- Add line breaks for better readability
- Updated slow_query_log_file_basic and general_log_file basis instead of the func version as
the func version run good but the basic versions fail.
- Sent innodb.test to dev@innodb.com.
- variables.test has differences probably due to a bug in mtr or in the SET statement (see bug#39369).
- general_log_file_basic.test and slow_query_log_file_bsaic.test have differences, which might be
produced by the new mtr (see bug#38124).
manually resolved conflicts:
Text conflict in client/mysqltest.c
Contents conflict in mysql-test/include/have_bug25714.inc
Text conflict in mysql-test/include/have_ndbapi_examples.inc
Text conflict in mysql-test/mysql-test-run.pl
Text conflict in mysql-test/suite/parts/inc/partition_check_drop.inc
Text conflict in mysql-test/suite/parts/inc/partition_layout.inc
Text conflict in mysql-test/suite/parts/inc/partition_layout_check1.inc
Text conflict in mysql-test/suite/parts/inc/partition_layout_check2.inc
Text conflict in mysql-test/suite/parts/r/partition_alter1_1_2_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_alter1_1_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_alter1_2_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_alter2_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_alter3_innodb.result
Text conflict in mysql-test/suite/parts/r/partition_alter3_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_basic_innodb.result
Text conflict in mysql-test/suite/parts/r/partition_basic_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_basic_symlink_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_engine_myisam.result
Text conflict in mysql-test/suite/parts/r/partition_syntax_myisam.result
Text conflict in mysql-test/suite/rpl_ndb/t/disabled.def
Text conflict in mysql-test/t/disabled.def
mysqltest disconnect/connect-combo could be so
quick that connect would hit the server before
it had processed the disconnect. Since that
resulted in one more concurrent connection than
we meant to have, global or per-user
max-user-connections could be exceeded.
This could lead to "random" failures in tests
that set those limits.
client/mysqltest.c:
Retry max-connect-retries times if connect in
connect_n_handle_errors() unexpectedly fails
on connection-limit as this could be a race.
Break out code that checks for expected --errors
into its own function.
mysql-test/r/mysqltest.result:
show that we throw a warning if test expects a SQL-state from
a command (diff_files, ...) that clearly can't produce one.
mysql-test/t/disabled.def:
re-enable user_limits
mysql-test/t/mysqltest.test:
show that we throw a warning if test expects a SQL-state from
a command (diff_files, ...) that clearly can't produce one.
Problem 1: tests often fail in pushbuild with a timeout when waiting
for the slave to start/stop/receive error.
Fix 1: Updated the wait_for_slave_* macros in the following way:
- The timeout is increased by a factor ten
- Refactored the macros so that wait_for_slave_param does the work for
the other macros.
Problem 2: Tests are often incorrectly written, lacking a
source include/wait_for_slave_to_[start|stop].inc.
Fix 2: Improved the chance to get it right by adding
include/start_slave.inc and include/stop_slave.inc, and updated tests
to use these.
Problem 3: The the built-in test language command
wait_for_slave_to_stop is a misnomer (does not wait for the slave io
thread) and does not give as much debug info in case of failure as
the otherwise equivalent macro
source include/wait_for_slave_sql_to_stop.inc
Fix 3: Replaced all calls to the built-in command by a call to the
macro.
Problem 4: Some, but not all, of the wait_for_slave_* macros had an
implicit connection slave. This made some tests confusing to read,
and made it more difficult to use the macro in circular replication
scenarios, where the connection named master needs to wait.
Fix 4: Removed the implicit connection slave from all
wait_for_slave_* macros, and updated tests to use an explicit
connection slave where necessary.
Problem 5: The macros wait_slave_status.inc and wait_show_pattern.inc
were unused. Moreover, using them is difficult and error-prone.
Fix 5: remove these macros.
Problem 6: log_bin_trust_function_creators_basic failed when running
tests because it assumed @@global.log_bin_trust_function_creators=1,
and some tests modified this variable without resetting it to its
original value.
Fix 6: All tests that use this variable have been updated so that
they reset the value at end of test.
mysql-test/extra/rpl_tests/rpl_extraMaster_Col.test:
Replaced wait_for_slave_to_stop by include/wait_for_slave_sql_to_stop.inc
mysql-test/extra/rpl_tests/rpl_extraSlave_Col.test:
Replaced wait_for_slave_to_stop by include/wait_for_slave_sql_to_stop.inc
Added connection slave since includ/wait_for_slave_sql_to_stop.inc
does not do that anymore.
mysql-test/extra/rpl_tests/rpl_log.test:
Replaced start slave+wait_slave_status by start_slave.inc
mysql-test/include/reset_master_and_slave.inc:
replaced start/stop slave by start_slave.inc/stop_slave.inc
mysql-test/include/sync_slave_io_with_master.inc:
Improved comments and error message.
mysql-test/include/wait_for_slave_io_to_stop.inc:
Refactored to use wait_for_slave_param.inc.
Removed connection slave.
mysql-test/include/wait_for_slave_param.inc:
- Improved usage instructions
- Added more debug info in case of timeout
- Added parameters $slave_param_comparison, $slave_timeout,
$slave_keep_connection, $slave_error_message
mysql-test/include/wait_for_slave_sql_error.inc:
Refactored to use wait_for_slave_param.inc.
Removed connection slave.
mysql-test/include/wait_for_slave_sql_to_start.inc:
Refactored to use wait_for_slave_param.inc.
Removed connection slave.
mysql-test/include/wait_for_slave_sql_to_stop.inc:
Refactored to use wait_for_slave_param.inc.
Removed connection slave.
mysql-test/include/wait_for_slave_to_start.inc:
Refactored to use wait_for_slave_param.inc.
Removed connection slave.
mysql-test/include/wait_for_slave_to_stop.inc:
Refactored to use wait_for_slave_param.inc.
Removed connection slave.
mysql-test/include/wait_show_pattern.inc:
Removed unused (and error-prone) file
mysql-test/include/wait_slave_status.inc:
Removed unused (and error-prone) file
mysql-test/suite/binlog/t/binlog_auto_increment_bug33029.test:
Renamed $keep_connection to $slave_keep_connection.
mysql-test/suite/rpl/t/rpl_bug26395.test:
Replace stop slave by stop_slave.inc
mysql-test/suite/rpl/t/rpl_circular_for_4_hosts.test:
Replace start/stop slave by start_slave.inc/stop_slave.inc.
Replace wait_for_slave_param by wait_for_slave_sql_to_stop.inc.
mysql-test/suite/rpl/t/rpl_dual_pos_advance.test:
Renamed $keep_connection to $slave_keep_connection.
mysql-test/suite/rpl/t/rpl_flushlog_loop.test:
Replace wait_slave_status by start_slave.inc
mysql-test/suite/rpl/t/rpl_idempotency.test:
Added connection slave since wait_for_slave_sql_to_stop.inc does not
do that any more.
mysql-test/suite/rpl/t/rpl_incident.test:
Replaced wait_for_slave_to_stop by wait_for_slave_sql_to_stop.inc
mysql-test/suite/rpl/t/rpl_init_slave.test:
Replaced start/stop slave by start_slave.inc/stop_slave.inc.
Replaced save_master_pos;connection slave;sync_with_master by
sync_slave_with_master.
mysql-test/suite/rpl/t/rpl_log_pos.test:
Replaced start/stop slave by start_slave.inc/stop_slave.inc.
Replaced wait_for_slave_param by other wait_for_slave_* macros.
mysql-test/suite/rpl/t/rpl_packet.test:
Replaced start/stop slave by start_slave.inc/stop_slave.inc.
mysql-test/suite/rpl/t/rpl_row_inexist_tbl.test:
Replaced start/stop slave by start_slave.inc/stop_slave.inc.
mysql-test/suite/rpl/t/rpl_row_stop_middle_update.test:
Replaced start/stop slave by start_slave.inc/stop_slave.inc.
mysql-test/suite/rpl/t/rpl_row_until.test:
Replaced start/stop slave by start_slave.inc/stop_slave.inc.
Replaced save_master_pos;connection slave;sync_with_master by
sync_slave_with_master.
mysql-test/suite/rpl/t/rpl_server_id1.test:
Replaced start/stop slave by start_slave.inc/stop_slave.inc.
mysql-test/suite/rpl/t/rpl_slave_grp_exec.test:
Replaced start/stop slave by start_slave.inc/stop_slave.inc.
mysql-test/suite/rpl/t/rpl_slave_skip.test:
Replaced start/stop slave by start_slave.inc/stop_slave.inc.
mysql-test/suite/rpl/t/rpl_slave_status.test:
Replaced start/stop slave by start_slave.inc/stop_slave.inc.
mysql-test/suite/rpl/t/rpl_sp.test:
Restore @@global.log_bin_trust_function_creators at end of test.
mysql-test/suite/rpl/t/rpl_sp_effects.test:
Restore @@global.log_bin_trust_function_creators at end of test.
mysql-test/suite/rpl/t/rpl_stm_until.test:
Replaced start/stop slave by start_slave.inc/stop_slave.inc.
Replaced save_master_pos;connection slave;sync_with_master by
sync_slave_with_master.
mysql-test/suite/rpl_ndb/t/rpl_ndb_basic.test:
Replaced start slave by start_slave.inc.
Added explicit connection slave since wait_for_slave_sql_to_stop.inc
does not do that anymore.
mysql-test/t/disabled.def:
Disabled failing test.
mysql-test/t/func_time.test:
Restore @@global.log_bin_trust_function_creators at end of test.
mysql-test/t/grant.test:
Restore @@global.log_bin_trust_function_creators at end of test.
mysql-test/t/grant2.test:
Restore @@global.log_bin_trust_function_creators at end of test.
mysql-test/t/innodb_notembedded.test:
Restore @@global.log_bin_trust_function_creators at end of test.
mysql-test/t/log_bin_trust_function_creators_func.test:
Restore @@global.log_bin_trust_function_creators at end of test.
Clean up at end of test by dropping the created user.
mysql-test/t/query_cache.test:
Restore @@global.log_bin_trust_function_creators at end of test.
mysql-test/t/query_cache_notembedded.test:
Restore @@global.log_bin_trust_function_creators at end of test.
mysql-test/t/rpl_init_slave_func.test:
Replaced start/stop slave by start_slave.inc/stop_slave.inc.
mysql-test/t/timezone2.test:
Restore @@global.log_bin_trust_function_creators at end of test.
This is not a fix, it just disables the erroneous test cases.
mysql-test/t/disabled.def:
Disabled a number of new tests that contain sleeps and that
have not been checked for race conditions. At least some of
them contain race conditions.
Made the test innodb_max_dirty_pages_pct_func clean up after itself.
mysql-test/r/innodb_max_dirty_pages_pct_func.result:
Updated result file.
mysql-test/t/disabled.def:
Fixed BUG#37906
mysql-test/t/innodb_max_dirty_pages_pct_func.test:
Made the test clean up after itself.
The failing test case is depending on unnecessary status variable output
which changes based on build configuration. By reducing the output the test
becomes more stable.
mysql-test/r/status.result:
Modified test case
mysql-test/t/disabled.def:
Enabled status.test
mysql-test/t/status.test:
Modified test case.
into bodhi.(none):/opt/local/work/mysql-5.1-27430
Makefile.am:
Auto merged
include/my_global.h:
Auto merged
mysql-test/include/mix1.inc:
Auto merged
sql/item.cc:
Auto merged
sql/my_decimal.h:
Auto merged
sql/mysqld.cc:
Auto merged
sql/set_var.cc:
Auto merged
sql/set_var.h:
Auto merged
sql/sp.cc:
Auto merged
sql/sp_head.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/sql_update.cc:
Auto merged
sql/share/errmsg.txt:
Auto merged
sql/sql_yacc.yy:
Auto merged
libmysqld/CMakeLists.txt:
Manual merge.
libmysqld/lib_sql.cc:
Manual merge.
mysql-test/t/disabled.def:
Manual merge.
max_heap_table_size_basic_32, query_cache_size_basic_32 and
tmp_table_size_basic_32 tests have been disabled according to
bug #36522.
mysql-test/t/disabled.def:
max_heap_table_size_basic_32, query_cache_size_basic_32 and
tmp_table_size_basic_32 tests have been disabled according to
bug #36522.
FLUSH STATUS doesn't clear the values of the global status variables.
The test case is reduced to testing session local Com-variables until
FLUSH GLOBAL STATUS is implemented.
mysql-test/r/status.result:
Reduce test to testing session status until 'FLUSH GLOBAL STATUS' is
implemented.
mysql-test/t/disabled.def:
Enable main.status.test.
mysql-test/t/status.test:
Reduce test to testing session status until 'FLUSH GLOBAL STATUS' is
implemented.
- a 64 bit compile warning in embedded
- disabled the new (and failing tests for Bug#36522
libmysqld/lib_sql.cc:
Fixed: win64 warning
mysql-test/t/disabled.def:
Disabled the new (and failing) tests for 36522
Enable previously disabled test cases which were tested against
the embedded build. The test cases are modified so that they require
non-embedded build.
mysql-test/t/disabled.def:
Re-enabled event_scheduler_basic and event_scheduler_func since
these tests aren't suppose to work in embedded build anyway.
mysql-test/t/event_scheduler_basic.test:
Require that this test isn't run on embedded build
mysql-test/t/event_scheduler_func.test:
Require that this test isn't run on embedded build
mysql-test/r/query_cache_wlock_invalidate_func.result:
Adjusted test. Query cache doesn't support multiple statements and thus
using a delimiter change won't work.
mysql-test/t/disabled.def:
Enabled the query_cache_wlock_invalidate_func test.
mysql-test/t/query_cache_wlock_invalidate_func.test:
Adjusted test. Query cache doesn't support multiple statements and thus
using a delimiter change won't work.
mysql-test/r/group_concat_max_len_func.result:
Properly restore global group_concat_max_len value at end of test
mysql-test/t/disabled.def:
Re-disable user_limits test; it is still failing randomly (bug 33696)
mysql-test/t/group_concat_max_len_func.test:
Update test results
into ramayana.hindu.god:/home/tsmith/m/bk/build/51
mysql-test/mysql-test-run.pl:
Auto merged
mysql-test/suite/funcs_1/datadict/processlist_val.inc:
Auto merged
mysql-test/t/disabled.def:
Auto merged
mysql-test/suite/rpl/t/disabled.def:
SCCS merged
Enable back the disabled test case.
mysql-test/include/mix1.inc:
Fix a race condition in the test, causing a sporadic failure.
mysql-test/r/innodb_mysql.result:
Update test case result.
mysql-test/t/disabled.def:
Enable the test case innodb_mysql.
sql/sql_parse.cc:
Fix the random failure of innodb_mysql test. The failure is not
random any more after a patch for Bug 12713 added asserts around
handler commit.
into bodhi.(none):/opt/local/work/mysql-5.1-27430
include/my_global.h:
Auto merged
mysql-test/r/grant.result:
Auto merged
mysql-test/t/disabled.def:
Auto merged
mysql-test/t/grant.test:
Auto merged
sql/item.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/mysqld.cc:
Auto merged
sql/set_var.cc:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
sql/table.h:
Auto merged
storage/myisam/mi_create.c:
Auto merged
tests/mysql_client_test.c:
Auto merged
sql/share/errmsg.txt:
Manual merge.
WL#4165 Prepared statements: validation
WL#4166 Prepared statements: automatic re-prepare
Fixes
Bug#27430 Crash in subquery code when in PS and table DDL changed after PREPARE
Bug#27690 Re-execution of prepared statement after table was replaced with a view crashes
Bug#27420 A combination of PS and view operations cause error + assertion on shutdown
The basic idea of the patch is to keep track of table metadata between
prepared statement prepare and execute. If some table used in the statement
has changed, the prepared statement is re-prepared before execution.
See WL#4165 and WL#4166 contents and comments in the code for details
of the implementation.
include/my_global.h:
Remove 'register' keyword to avoid warnings when swapping large structures
that don't fit into a register. Any modern compiler is capable of placing
a variable in a register when that would benefit performance.
mysql-test/r/ps_1general.result:
Update test results: since now we re-prepare automatically,
more correct results are produced in prepare-ddl-execute scenario.
mysql-test/r/query_cache_merge.result:
Ensure that the table definition cache is large enough for
the test to pass in --ps-protocol
mysql-test/r/trigger.result:
Update test results to reflect automatic statement reprepare.
mysql-test/t/disabled.def:
Enable ps_ddl.test, which now passes.
mysql-test/t/ps_1general.test:
Since now we re-execute prepared statements after DDL successfully,
change the test to produce repeatable results. Remove expectancy of
an error in one place where now we automatically reprepare the prepared
statement.
mysql-test/t/query_cache_merge.test:
Ensure the table definition cache is large enough for the test to pass
in --ps-protocol
mysql-test/t/trigger.test:
Sinc
sql/item.cc:
Implement Item_param "copy" functionality, used at re-prepare of
a prepared statement.
We copy the type of the original parameter, and move the assigned value,
if any. Sic, the value is "moved", since it can be quite big --
e.g. in case we deal with a LONG DATA parameter.
It's essential to move the value from the old parameter since
at the time of re-prepare the client packet with the necessary information
may be not available.
sql/item.h:
Declare a new method used for reprepare.
sql/my_decimal.h:
Implement "swap()" functionality of class my_decimal to be
able to easily swap two decimal values.
sql/mysql_priv.h:
Declare enum_metadata_type.
sql/mysqld.cc:
Implement a status variable for the number of reprepared statements.
sql/sql_base.cc:
Implement metadata version validation.
sql/share/errmsg.txt:
Add two new error messages: ER_NEED_REPREPARE and ER_PS_REBIND.
The first error (theoretically) never reaches the user.
It is issued by the metadata validation framework when a metadata version
has changed between prepare and execute. Later on it's intercepted
and the statement is automatically re-prepared. Only if the error
has occurred repeatedly MAX_REPREPARE_ATTEMTS (3) times do we
return it to the user.
The second error is issued when after re-prepare we discover
that the metadata we sent over to the client using the binary
protocol differs drammatically from the new result set metadata
that the reprepared statement produces (e.g. number of result
set columns is different).
sql/sql_class.cc:
Implement metadata version validation framework.
sql/sql_class.h:
Declarations for metadata version validation framework.
sql/sql_parse.cc:
Mark commands for which we must invalidate and reprepare a prepared
statement when metadata has changed.
sql/sql_prepare.cc:
Implement WL#4165 and WL#4166 (limited support of metadata validation
and re-prepare).
sql/table.h:
Implement metadata validation.
tests/mysql_client_test.c:
Add a test case for WL#4166
Enable back the disabled test case.
mysql-test/t/disabled.def:
Enable the test case innodb_mysql.
sql/sql_parse.cc:
Fix the random failure of innodb_mysql test. The failure is not
random any more after a patch for Bug 12713 added asserts around
handler commit.
Mtr restarts servers because an option file exist for slave.
The option file for slave forces to skip test.foo table for replication.
But really test case does not invlved test.foo table at all.
So option file can be removed and mtr will not restart servers for test case.
BitKeeper/deleted/.del-rpl_view-slave.opt:
Rename: mysql-test/t/rpl_view-slave.opt -> BitKeeper/deleted/.del-rpl_view-slave.opt
mysql-test/t/disabled.def:
updated
Added --log-slave-updates because test requires it.
The events based on LOAD DATA INFILE masked by --replace_regex instead restarting of slave.
Added waiting start and stop of slave after START|STOP SLAVE statements.
mysql-test/r/rpl_log.result:
updated result file
mysql-test/t/disabled.def:
updated disabled.def
mysql-test/t/rpl_log-slave.opt:
updated option for slave
mysql-test/t/rpl_log.test:
updated test
into mysql1000.(none):/home/andrei/MySQL/MERGE/5.1-main2rpl
client/mysqltest.c:
Auto merged
mysql-test/t/disabled.def:
Auto merged
sql/slave.cc:
Auto merged
sql/slave.h:
Auto merged
sql/sql_class.cc:
Auto merged
into kaamos.(none):/data/src/opt/mysql-5.1-opt
client/mysql.cc:
Auto merged
client/mysqldump.c:
Auto merged
configure.in:
Auto merged
include/my_global.h:
Auto merged
libmysql/libmysql.c:
Auto merged
libmysqld/lib_sql.cc:
Auto merged
mysql-test/include/mix1.inc:
Auto merged
mysql-test/r/create.result:
Auto merged
mysql-test/r/func_str.result:
Auto merged
mysql-test/r/innodb.result:
Auto merged
mysql-test/r/innodb_mysql.result:
Auto merged
mysql-test/r/select.result:
Auto merged
mysql-test/r/subselect.result:
Auto merged
mysql-test/t/create.test:
Auto merged
mysql-test/t/disabled.def:
Auto merged
sql/filesort.cc:
Auto merged
sql/handler.cc:
Auto merged
sql/item.cc:
Auto merged
sql/item.h:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_func.cc:
Auto merged
sql/item_func.h:
Auto merged
sql/item_sum.cc:
Auto merged
sql/log.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/mysqld.cc:
Auto merged
sql/set_var.cc:
Auto merged
sql/sp.cc:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_plugin.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
storage/ndb/src/kernel/blocks/backup/Backup.hpp:
Auto merged
tests/mysql_client_test.c:
Auto merged
mysql-test/r/func_time.result:
Manual merge.
mysql-test/r/view.result:
Manual merge.
mysql-test/t/view.test:
Manual merge.
scripts/mysql_config.sh:
Manual merge.
sql-common/client.c:
Manual merge.
sql/sql_parse.cc:
Manual merge.
into quad.:/mnt/raid/alik/MySQL/devel/5.1-rt-merged
client/mysqltest.c:
Auto merged
mysql-test/r/view.result:
Auto merged
sql/ha_ndbcluster.cc:
Auto merged
sql/ha_ndbcluster_binlog.cc:
Auto merged
sql/handler.cc:
Auto merged
sql/log_event.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/mysqld.cc:
Auto merged
sql/set_var.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_connect.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
tests/mysql_client_test.c:
Auto merged
mysql-test/suite/rpl_ndb/t/disabled.def:
Manually merged.
mysql-test/t/disabled.def:
Manually merged.
Bug#34678 @@debug variable's incremental mode
The problem is that the per-thread debugging settings stack wasn't
being deallocated before the thread termination, leaking the stack
memory. The chosen solution is to push a new state if the current
is set to the initial settings and pop it (free) once the thread
finishes.
dbug/dbug.c:
Move dbug parser out of _db_set_ to a separate function and
make _db_set_ push a new stack if the corrent one is set to
the initial settings.
dbug/user.r:
Update DBUG_SET description.
mysql-test/t/disabled.def:
Re-enable test case which triggered the leak.
mysys/my_thr_init.c:
Pop a pushed state, nop if stack is empty.
sql/set_var.cc:
Handle incremental debug settings.
mysql-test/r/variables_debug.result:
Add new test case result for Bug#34678
mysql-test/t/variables_debug.test:
Add new test case for Bug#34678
