when there are no up-to-date system tables to support it:
 - initialize the scheduler before reporting "Ready for connections".
   This ensures that warnings, if any, are printed before "Ready for
   connections", and this message is not mangled.
 - do not abort the scheduler if there are no system tables
 - check the tables once at start up, remember the status and disable
   the scheduler if the tables are not up to date.
   If one attempts to use the scheduler with bad tables,
   issue an error message.
 - clean up the behaviour of the module under LOCK TABLES and pre-locking
   mode
 - make sure implicit commit of Events DDL works as expected.
 - add more tests


Collateral clean ups in the events code.

This patch fixes Bug#23631 Events: SHOW VARIABLES doesn't work 
when mysql.event is damaged


mysql-test/r/events.result:
  Update results.
mysql-test/r/events_bugs.result:
  Update results.
mysql-test/r/events_restart_phase1.result:
  Update results.
mysql-test/r/events_restart_phase2.result:
  Update results.
mysql-test/r/events_restart_phase3.result:
  Update results.
mysql-test/r/events_scheduling.result:
  Update results.
mysql-test/r/events_time_zone.result:
  Update results.
mysql-test/t/events.test:
  Add new tests for tampering with mysql.event and some more
  tests for sub-statements, LOCK TABLES mode and pre-locking.
mysql-test/t/events_bugs.test:
  Move the non-concurrent part of test for Bug 16420 to this file.
mysql-test/t/events_restart_phase1.test:
  Rewrite events_restart_* tests to take into account that now
  we check mysql.event table only once, at server startup.
mysql-test/t/events_restart_phase2.test:
  Rewrite events_restart_* tests to take into account that now
  we check mysql.event table only once, at server startup.
mysql-test/t/events_restart_phase3.test:
  Rewrite events_restart_* tests to take into account that now
  we check mysql.event table only once, at server startup.
mysql-test/t/events_scheduling.test:
  Add more coverage for event_scheduler global variable.
mysql-test/t/events_time_zone.test:
  Move the non-concurrent part of the tests for Bug 16420 to 
  events_bugs.test
sql/event_data_objects.cc:
  Move update_timing_fields functionality to Event_db_repository.
  Make loading of events from a table record more robust to tampering
  with the table - now we do not check mysql.event on every table open.
sql/event_data_objects.h:
  Cleanup.
sql/event_db_repository.cc:
  Now Event_db_repository is responsible for table I/O only.
  All the logic of events DDL is handled outside, in Events class please
  refer to the added test coverage to see how this change affected
  the behavior of Event Scheduler.
  Dependency on sp_head.h and sp.h removed.
  Make this module robust to tweaks with mysql.event table.
  Move check_system_tables from events.cc to this file
sql/event_db_repository.h:
  Cleanup declarations (remove unused ones, change return type to bool
  from int).
sql/event_queue.cc:
  Update to adapt to the new start up scheme of the Event Scheduler.
sql/event_queue.h:
  Cleanup declarations.
sql/event_scheduler.cc:
  Make all the error messages uniform:
  [SEVERITY] Event Scheduler: [user][schema.event] message
  Using append_identifier for error logging was an overkill - we may 
  need it only if the system character set may have NUL (null character)
  as part of a valid identifier, this is currently never the case, 
  whereas additional quoting did not look nice in the log.
sql/event_scheduler.h:
  Cleanup the headers.
sql/events.cc:
  Use a different start up procedure of Event Scheduler:
  - at start up, try to check the system tables first.
  If they are not up-to-date, disable the scheduler.
  - try to load all the active events. In case of a load error, abort
  start up.
  - do not parse an event on start up. Parsing only gives some information
  about event validity, but far not all.
  Consolidate the business logic of Events DDL in this module.
  Now opt_event_scheduler may change after start up and thus is protected
  by LOCK_event_metadata mutex.
sql/events.h:
  Use all-static-data-members approach to implement Singleton pattern.
sql/mysqld.cc:
  New invocation scheme of Events. Move some logic to events.cc.
  Initialize the scheduler before reporting "Ready for connections".
sql/set_var.cc:
  Clean up sys_var_thd_sql_mode::symbolic_mode_representation
  to work with a LEX_STRING.
  Move more logic related to @@events_scheduler global variable to Events
  module.
sql/set_var.h:
  Update declarations.
sql/share/errmsg.txt:
  If someone tampered with mysql.event table after the server has
  started we no longer give him/her a complete report what was actually 
  broken. Do not send the user to look at the error log in such case,
  as there is nothing there (check_table_intact is not executed).
sql/sp_head.cc:
  Update to a new declaration of 
  sys_var_thd_sql_mode::symbolic_mode_representation
sql/sql_db.cc:
  New invocation scheme of Events module.
sql/sql_parse.cc:
  Move more logic to Events module. Make sure that we are consistent
  in the way access rights are checked for Events DDL: always
  after committing the current transaction and checking the system tables.
sql/sql_show.cc:
  Update to the new declarations of 
  sys_var_thd_sql_mode::symbolic_mode_representation
sql/sql_test.cc:
  New invocation scheme of events.
sql/table.cc:
  mysql.event is a system table.
  Update check_table_intact to be concurrent, more verbose, and less smart.
sql/table.h:
  Add a helper method.
mysql-test/r/events_trans.result:
  New BitKeeper file ``mysql-test/r/events_trans.result''
mysql-test/t/events_trans.test:
  New BitKeeper file ``mysql-test/t/events_trans.test'':
  test cases for Event Scheduler that require a transactional
  storage engine.

mysql-test/r/events.result:
  Fix spelling.
mysql-test/r/events_bugs.result:
  Fix spelling.
mysql-test/r/ps.result:
  Fix spelling.
mysql-test/t/events.test:
  Fix spelling.
mysql-test/t/events_bugs.test:
  Fix spelling.
mysql-test/t/ps.test:
  Fix spelling.
sql/sql_yacc.yy:
  Fix spelling.
sql/share/errmsg.txt:
  Fix spelling.

include/typelib.h:
  Fix a compile warning. char *x is actually updated if
  it's found in the typelib (a peculiar way to return
  canonical value in case of a partial match)
mysys/typelib.c:
  Fix a warning.
sql/item_func.cc:
  Fix a compile-time warning.

into  bodhi.local:/opt/local/work/mysql-5.1-c1

the lexer API which internally uses  unsigned char variables to
address its state map. The implementation of the lexer should be
internal to the lexer, and not influence the rest of the code.


sql/event_data_objects.cc:
  Clean up unnecessary type casts.
sql/event_data_objects.h:
  Clean up unnecessary type casts.
sql/ha_ndbcluster.cc:
  Clean up unnecessary type casts.
sql/mysql_priv.h:
  Clean up unnecessary type casts.
sql/partition_info.h:
  Clean up unnecessary type casts.
sql/sp.cc:
  Clean up unnecessary type casts.
sql/sp_head.cc:
  Clean up unnecessary type casts.
sql/sp_head.h:
  Clean up unnecessary type casts.
sql/sql_lex.cc:
  Clean up unnecessary type casts.
sql/sql_lex.h:
  Clean up unnecessary type casts.
sql/sql_parse.cc:
  Clean up unnecessary type casts.
sql/sql_partition.cc:
  Clean up unnecessary type casts.
sql/sql_partition.h:
  Clean up unnecessary type casts.
sql/sql_prepare.cc:
  Clean up unnecessary type casts.
sql/sql_trigger.cc:
  Clean up unnecessary type casts.
sql/sql_view.cc:
  Clean up unnecessary type casts.
sql/sql_yacc.yy:
  Clean up unnecessary type casts.
sql/table.cc:
  Clean up unnecessary type casts.
sql/table.h:
  Clean up unnecessary type casts.

into  kpdesk.mysql.com:/home/thek/dev/mysql-5.1-runtime

mysql-test/r/sp.result:
  Corrected error in test case:
  - 1.84e+19 converted to unsigned bigint should be converted to
    1840000000000000000 < 18446744073709551615.
  - This fails on windows and the failing test is extracted to a new
    bugreport.

include/mysql_h.ic:
  Change find_type family to accept const TYPELIB*.
  This sort of change can not break the ABI.

into  kpdesk.mysql.com:/home/thek/dev/mysql-5.1-runtime


mysql-test/t/sp.test:
  Auto merged
sql/item_func.cc:
  Auto merged
mysql-test/r/sp.result:
  null merge

- 1.84e+15 converted to unsigned bigint should be
  18400000000000000000 < 18446744073709551615.
- The test will still fail on windows, and is extracted
  into a new bug report.

BitKeeper/deleted/.del-events_restart_phase0.log:
  Delete: mysql-test/t/events_restart_phase0.log
BitKeeper/deleted/.del-events_restart_phase0.result:
  Delete: mysql-test/t/events_restart_phase0.result
BitKeeper/deleted/.del-events_restart_phase0.result~7954c29cea87c6f7:
  Delete: mysql-test/r/events_restart_phase0.result

into  naruto.:C:/cpp/mysql-5.0-runtime


mysql-test/r/sp.result:
  manual merge
mysql-test/t/sp.test:
  manual merge
sql/item_func.cc:
  manual merge

into  naruto.:C:/cpp/mysql-5.1-runtime

into  naruto.:C:/cpp/mysql-5.1-runtime


sql/item_func.cc:
  Auto merged
mysql-test/r/sp.result:
  manual merge
mysql-test/t/sp.test:
  manual merge

to not collide with the recently introduced thread scheduler module.


mysql-test/r/events.result:
  Update test results with new error texts (SCHEDULER -> Event Scheduler,
  grammar).
sql/event_data_objects.cc:
  SCHEDULER -> Event Scheduler.
sql/event_queue.cc:
  SCHEDULER -> Event Scheduler.
sql/event_scheduler.cc:
  SCHEDULER -> Event Scheduler.
sql/events.cc:
  SCHEDULER -> Event Scheduler.
sql/share/errmsg.txt:
  SCHEDULER -> Event Scheduler. Fix English grammar.

sql/sql_servers.cc:
  It's not a fatal error if we can not open mysql.servers table
  (the start up process continues).

A larger patch is to come, this is to exclude rudimentary changes
from it.


sql/event_data_objects.cc:
  Whitespace change.
sql/event_data_objects.h:
  Remove debug allocators - we have safemalloc.
sql/event_db_repository.cc:
  Whitespace change.
sql/event_db_repository.h:
  Whitespace change.
sql/event_queue.cc:
  Remove an unused structure. Whitespace change.
sql/event_queue.h:
  Whitespace.
sql/event_scheduler.cc:
  Whitespace change.
sql/event_scheduler.h:
  Add comments. Whitespace change.
sql/events.cc:
  Whitespace change.
sql/events.h:
  Trivial cleanups.

into  bodhi.local:/opt/local/work/mysql-5.1-runtime

mysql-test/t/events_logs_tests.test:
  Try to fix a race condition that breaks this test on Windows.

into  bodhi.local:/opt/local/work/mysql-5.1-runtime

into  bodhi.local:/opt/local/work/mysql-5.0-runtime

sql/event_data_objects.cc:
  Fix Windows 64 bit build warnings. No better fix exists at the moment.

scripts/mysql_system_tables.sql:
  Add time_zone to the list of mysql.event columns.
scripts/mysql_system_tables_fix.sql:
  Update after a bad merge: now mysql_system_tables_fix contains
  only alter definitions, no CREATE definitions (single definition
  source approach that was implemented by Magnus).

into  naruto.:C:/cpp/mysql-5.1-runtime


sql/item_func.cc:
  Auto merged
mysql-test/r/sp.result:
  Manual merge
mysql-test/t/sp.test:
  Manuel merge

into  bk-internal.mysql.com:/data0/bk/mysql-5.1-opt


sql/sql_insert.cc:
  Auto merged

  After merge fix.


sql/sql_insert.cc:
  After merge fix.

into  moonbone.local:/mnt/gentoo64/work/test-5.1-opt-mysql


mysql-test/r/trigger.result:
  Auto merged
mysql-test/t/trigger.test:
  Auto merged
sql/sql_insert.cc:
  Manually merged.

  Removed wrong fix for the bug#27006.
  The bug was added by the fix for the bug#19978 and fixed by Monty on 2007/02/21.
trigger.test, trigger.result:
  Corrected test case for the bug#27006.


sql/sql_insert.cc:
  Removed wrong fix for the bug#27006.
  The bug was added by the fix for the bug#19978 and fixed by Monty on 2007/02/21.
mysql-test/t/trigger.test:
  Corrected test case for the bug#27006.
mysql-test/r/trigger.result:
  Corrected test case for the bug#27006.

into  bodhi.local:/opt/local/work/mysql-5.1-runtime


mysql-test/r/sp.result:
  Auto merged
mysql-test/t/sp.test:
  Auto merged
sql/field.cc:
  Auto merged
sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/sp_head.cc:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_show.cc:
  Auto merged
sql/sql_table.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged

into  bodhi.local:/opt/local/work/mysql-5.1-runtime


include/my_global.h:
  Auto merged
mysql-test/mysql-test-run.pl:
  Auto merged
mysql-test/r/events_scheduling.result:
  Auto merged
BitKeeper/deleted/.del-init_db.sql~a77d572c39d5a1f8:
  Auto merged
BitKeeper/deleted/.del-mysql_create_system_tables.sh:
  Auto merged
mysql-test/r/query_cache.result:
  Auto merged
mysql-test/r/view.result:
  Auto merged
mysql-test/t/events_scheduling.test:
  Auto merged
mysql-test/t/grant_cache.test:
  Auto merged
mysql-test/t/query_cache.test:
  Auto merged
mysql-test/t/view.test:
  Auto merged
scripts/mysql_system_tables_fix.sql:
  Auto merged
sql/event_db_repository.cc:
  Auto merged
sql/event_queue.cc:
  Auto merged
sql/field.cc:
  Auto merged
sql/handler.cc:
  Auto merged
sql/handler.h:
  Auto merged
sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_subselect.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/sp.cc:
  Auto merged
sql/sp_head.cc:
  Auto merged
sql/sp_head.h:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_help.cc:
  Auto merged
sql/sql_lex.cc:
  Auto merged
sql/sql_lex.h:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_prepare.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_show.cc:
  Auto merged
sql/sql_table.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
sql/table.cc:
  Auto merged
sql/share/errmsg.txt:
  Auto merged
sql/tztime.cc:
  Auto merged
storage/innobase/handler/ha_innodb.cc:
  Auto merged
storage/myisam/ha_myisam.cc:
  Auto merged
storage/myisam/ha_myisam.h:
  Auto merged
mysql-test/r/skip_grants.result:
  Manualmerge.
mysql-test/r/sp.result:
  Manualmerge.
mysql-test/t/skip_grants.test:
  Manualmerge.
mysql-test/t/sp.test:
  Manualmerge.
sql/event_data_objects.cc:
  Manualmerge.

into  bodhi.local:/opt/local/work/mysql-5.0-runtime


sql/field.cc:
  Auto merged
sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/sp_head.cc:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_show.cc:
  Auto merged
sql/sql_table.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
mysql-test/r/sp.result:
  SCCS merged
mysql-test/t/sp.test:
  SCCS merged

mysql-test/r/sp.result:
  Manual merge.
  - lowercase 'default' changes to uppercase 'DEFAULT'
sql/item_func.cc:
  Manual merge
  - shared tables is handled differently in 5.1.
  - Use of LEX_STRING instead of char*.
  - Dummy table allocated differently.

include/config-win.h: SIZEOF_INT
include/my_global.h: win64 fix
support-files/Makefile.am: automake magic


dbug/dbug.c:
  unused variable removed
include/config-win.h:
  SIZEOF_INT
include/my_global.h:
  win64 fix
support-files/Makefile.am:
  automake magic

into  janus.mylan:/usr/home/serg/Abk/mysql-5.1


sql/sql_insert.cc:
  Auto merged

s/ulonglong/key_part_map/, comments


include/heap.h:
  wl#3700 - post-review fixes:
  s/ulonglong/key_part_map/
include/my_base.h:
  wl#3700 - post-review fixes:
  s/ulonglong/key_part_map/
include/myisam.h:
  wl#3700 - post-review fixes:
  s/ulonglong/key_part_map/
include/myisammrg.h:
  wl#3700 - post-review fixes:
  s/ulonglong/key_part_map/
sql/event_db_repository.cc:
  wl#3700 - post-review fixes:
  s/ulonglong/key_part_map/
sql/ha_partition.cc:
  wl#3700 - post-review fixes:
  s/ulonglong/key_part_map/
sql/ha_partition.h:
  wl#3700 - post-review fixes:
  s/ulonglong/key_part_map/
sql/sql_select.h:
  wl#3700 - post-review fixes:
  remove tab_to_keypart_map()

  Post-merge fix.


sql/sql_insert.cc:
  Post-merge fix.

into  janus.mylan:/usr/home/serg/Abk/mysql-5.1


sql/mysql_priv.h:
  Auto merged
sql/opt_range.cc:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_help.cc:
  Auto merged
sql/sql_insert.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/table.cc:
  Auto merged
sql/table.h:
  Auto merged
storage/myisam/ha_myisam.cc:
  Auto merged

into  moonbone.local:/mnt/gentoo64/work/test-5.1-opt-mysql


mysql-test/r/trigger.result:
  Auto merged
mysql-test/t/trigger.test:
  Auto merged
sql/sql_insert.cc:
  Manually merged