SHOW STATUS does not anymore change local status variables (except com_show_status). Global status variables are still updated.
SHOW STATUS are not anymore put in slow query log because of no index usage.

Implemntation done by removing orig_sql_command and moving logic of SHOW STATUS to mysql_excute_command()
This simplifies code and allows us to remove some if statements all over the code.

Upgraded uc_update_queries[] to sql_command_flags and added more bitmaps to better categorize commands.
This allowed some overall simplifaction when testing sql_command.

Fixes bugs:
Bug#10210: running SHOW STATUS increments counters it shouldn't
Bug#19764: SHOW commands end up in the slow log as table scans


mysql-test/r/grant_cache.result:
  Fixed results after SHOW STATUS doesn't anymore affect status variables
mysql-test/r/information_schema.result:
  Added extra test to cover more code
mysql-test/r/query_cache.result:
  Remove resuts from previous tests
mysql-test/r/status.result:
  Added more tests for testing of last_query_cost and how SHOW STATUS affects status variables.
  (Bug#10210)
mysql-test/r/temp_table.result:
  Fixed results after SHOW STATUS doesn't anymore affect status variables
mysql-test/r/union.result:
  Fixed results after SHOW STATUS is not logged to slow query log
  (Bug#19764)
mysql-test/t/events_microsec.test:
  Disable warnings at init
mysql-test/t/information_schema.test:
  Added extra test to cover more code
mysql-test/t/query_cache.test:
  Remove resuts from previous tests
mysql-test/t/status.test:
  Added more tests for testing of last_query_cost and how SHOW STATUS affects status variables.
  (Bug #10210)
sql/mysql_priv.h:
  Added 'sql_command_flags'
sql/sql_class.cc:
  New function add_diff_to_status(), used to update global status variables when using SHOW STATUS
sql/sql_class.h:
  New function 'fill_information_schema_tables()'
  (One could not anymore use fill_derived_tables() for this as only_view_structures() is not relevant for information schema tables)
  Added defines for bit flags in sql_command_flags[]
sql/sql_lex.cc:
  Remove orig_sql_command
sql/sql_lex.h:
  Remove orig_sql_command
sql/sql_parse.cc:
  Rename uc_update_queries -> sql_command_flags.
  Enhanced 'sql_command_flags' to better classify SQL commands
  uc_update_queries[] != 0 is changed to (sql_command_flags[] & CF_CHANGES_DATA)
  lex->orig_sql_command == SQLCOM_END is changed to (sql_command_flags[lex->sql_command] & CF_STATUS_COMMAND) == 0)
  
  Simplify incrementing of thd->status_var.com_stat[] as we don't have to do special handling for SHOW commands.
  
  Split SQLCOM_SELECT handling in mysql_execute_command() to a separate function.
  Added special handling of SHOW STATUS commands in mysql_execute_command() and call common SQLCOM_SELECT handling.
  These changes allows us to easily fix that we save and restore status variables during execution of a SHOW STATUS command.
  Don't log SHOW STATUS commands to slow query log.
  
  This fixes Bug#10210 and Bug#19764 without adding additional 'if' code.
  (The new code is faster than the original as we now have fewer if's than before)
sql/sql_prepare.cc:
  Clean up prepare-check handling of SQLCOM commands by using sql_command_flags[]
  This simplifes code and ensures that code works even if someone forgets to put a new status commands into the switch statement.
sql/sql_select.cc:
  Remove special handling of SHOW STATUS.
  (This is now done in SQLCOM_SHOW_STATUS part in mysql_execute_command())
sql/sql_show.cc:
  Remove orig_sql_command
  Only change sql_command during 'open_normal_and_derived_tables()' (for views) and not for the full duration of generating data.
  Changed 'show status' to use thd->initial_status_var to ensure that the current statement is not affecting the to-be-used values.
  Use thd->fill_information_schema_tables() instead of 'thd->fill_derived_tables()' as the later wrongly checks the value of sql_command.
sql/sql_yacc.yy:
  Remove usage of orig_sql_command.
  One side effect of this is that we need to test for cursors if the current command is a SELECT or a SHOW command.
sql/structs.h:
  Updated comment

into  mysql.com:/home/my/mysql-5.1


include/my_sys.h:
  Auto merged
sql/field.cc:
  Auto merged
sql/ha_ndbcluster.cc:
  Auto merged
sql/ha_ndbcluster_binlog.cc:
  Auto merged
sql/item_strfunc.cc:
  Auto merged
sql/opt_range.cc:
  Auto merged
sql/sql_string.cc:
  Auto merged

Added missing copyright
Indentation and prototype fixes
Fixed compiler warning


include/my_sys.h:
  Fix prototype for my_print_open_files.
  Indentation fixes
mysys/mf_keycache.c:
  Fix that key cache can be compiled without #define THREAD
mysys/my_error.c:
  Indentation cleanups
mysys/my_memmem.c:
  Added missing copyright.
  Fix include files
sql/event.cc:
  unsigned char -> uchar
sql/field.cc:
  unsigned char -> uchar
sql/filesort.cc:
  Indentation fix
sql/ha_ndbcluster.cc:
  unsigned char -> uchar
sql/ha_ndbcluster_binlog.cc:
  unsigned char -> uchar
sql/item_strfunc.cc:
  unsigned char -> uchar
sql/log_event.cc:
  unsigned char -> uchar
sql/opt_range.cc:
  Indentation fixes
sql/sql_crypt.cc:
  unsigned char -> uchar
sql/sql_string.cc:
  unsigned char -> uchar
sql/tztime.cc:
  unsigned char -> uchar
storage/heap/hp_extra.c:
  Clear also next_block (See heap_scan_init)
storage/heap/hp_test2.c:
  Set required struct memeber max_table_size
  (Fixes that hp_test2 works again)
storage/myisam/mi_rsamepos.c:
  Fixed bug in mi_rsame_with_pos
strings/decimal.c:
  Fixed compiler warning

  Fixed failing test case
field.cc, item_cmpfunc.cc, select.result:
  After merge fix


mysql-test/r/select.result:
  After merge fix
mysql-test/r/rpl_stm_log.result:
  Fixed failing test case
sql/item_cmpfunc.cc:
  After merge fix
sql/field.cc:
  After merge fix
mysql-test/extra/rpl_tests/rpl_log.test:
  Fixed failing test case

configure.in:
  Auto merged
client/mysqlbinlog.cc:
  Auto merged
mysql-test/mysql-test-run.pl:
  Auto merged
mysql-test/r/archive.result:
  Auto merged
mysql-test/r/auto_increment.result:
  Auto merged
mysql-test/r/cast.result:
  Auto merged
mysql-test/r/ctype_utf8.result:
  Auto merged
mysql-test/r/func_group.result:
  Auto merged
mysql-test/r/func_str.result:
  Auto merged
mysql-test/r/func_time.result:
  Auto merged
mysql-test/r/multi_update.result:
  Auto merged
mysql-test/r/ndb_lock.result:
  Auto merged
mysql-test/r/replace.result:
  Auto merged
mysql-test/r/union.result:
  Auto merged
mysql-test/t/archive.test:
  Auto merged
mysql-test/t/auto_increment.test:
  Auto merged
mysql-test/t/delayed.test:
  Auto merged
mysql-test/t/func_time.test:
  Auto merged
mysql-test/t/multi_update.test:
  Auto merged
mysql-test/t/ndb_lock.test:
  Auto merged
mysql-test/t/select.test:
  Auto merged
sql/field.cc:
  Auto merged
sql/ha_ndbcluster.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_strfunc.cc:
  Auto merged
sql/item_timefunc.cc:
  Auto merged
sql/opt_range.cc:
  Auto merged
sql/opt_sum.cc:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_insert.cc:
  Auto merged
sql/sql_lex.cc:
  Auto merged
sql/sql_lex.h:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_select.h:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
sql/structs.h:
  Auto merged
storage/archive/ha_archive.cc:
  Auto merged
tests/mysql_client_test.c:
  Auto merged

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

    my_atomic_XX_t -> intXX, no implicit locking anymore
    simplified framework, support for requested cleanups


dbug/dbug.c:
  compiler warning
include/atomic/nolock.h:
  my_atomic_XX_t -> intXX
include/atomic/rwlock.h:
  my_atomic_XX_t -> intXX, no implicit locking anymore
include/atomic/x86-gcc.h:
  my_atomic_XX_t -> intXX, no implicit locking anymore
include/atomic/x86-msvc.h:
  my_atomic_XX_t -> intXX
  simplified defines
  support for cleanups
include/my_atomic.h:
  my_atomic_XX_t -> intXX, no implicit locking anymore
  simplified framework, support for requested cleanups
unittest/examples/no_plan-t.c:
  compiler warning
unittest/mysys/Makefile.am:
  fix for dependencies
unittest/mysys/my_atomic-t.c:
  my_atomic_XX_t -> intXX, no implicit locking anymore
unittest/mytap/tap.c:
  cosmetic fix

storage/ndb/src/ndbapi/ndberror.c:
  postmerge fix

into  clam.ndb.mysql.com:/space/pekka/ndb/version/my51-bug19285


storage/ndb/src/ndbapi/NdbBlob.cpp:
  SCCS merged
storage/ndb/src/ndbapi/ndberror.c:
  use local

ndb/src/ndbapi/NdbBlob.cpp:
  bug#19285 minor fixes
ndb/src/ndbapi/ndberror.c:
  bug#19285 minor fixes

into  clam.ndb.mysql.com:/space/pekka/ndb/version/my51-bug19285


storage/ndb/include/ndbapi/NdbBlob.hpp:
  manual merge
storage/ndb/include/ndbapi/NdbScanOperation.hpp:
  SCCS merged
storage/ndb/src/ndbapi/NdbBlob.cpp:
  SCCS merged
storage/ndb/src/ndbapi/NdbBlobImpl.hpp:
  manual merge
storage/ndb/src/ndbapi/ndberror.c:
  use local - add 4275 afterwards
storage/ndb/test/ndbapi/testBlobs.cpp:
  automerge

into moonbone.local:/work/tmp_merge-5.0-opt-mysql


configure.in:
  Auto merged
mysql-test/mysql-test-run.pl:
  Auto merged
mysql-test/r/archive.result:
  Auto merged
mysql-test/r/auto_increment.result:
  Auto merged
mysql-test/r/ndb_lock.result:
  Auto merged
mysql-test/r/rpl_log.result:
  Auto merged
mysql-test/t/archive.test:
  Auto merged
mysql-test/t/auto_increment.test:
  Auto merged
mysql-test/t/ndb_lock.test:
  Auto merged
mysql-test/t/rpl_log.test:
  Auto merged
sql/ha_archive.cc:
  Auto merged
sql/ha_ndbcluster.cc:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/sql_lex.cc:
  Auto merged
tests/mysql_client_test.c:
  Auto merged

mysql-test/mysql-test-run.pl:
  Auto merged
mysql-test/r/archive.result:
  Auto merged
mysql-test/r/auto_increment.result:
  Auto merged
mysql-test/r/func_time.result:
  Auto merged
mysql-test/r/ndb_lock.result:
  Auto merged
mysql-test/r/rpl_log.result:
  Auto merged
mysql-test/r/select.result:
  Auto merged
mysql-test/t/archive.test:
  Auto merged
mysql-test/t/auto_increment.test:
  Auto merged
mysql-test/t/func_time.test:
  Auto merged
mysql-test/t/ndb_lock.test:
  Auto merged
mysql-test/t/rpl_log.test:
  Auto merged
mysql-test/t/select.test:
  Auto merged
sql/ha_ndbcluster.cc:
  Auto merged
sql/item_timefunc.cc:
  Auto merged
sql/item_timefunc.h:
  Auto merged
sql/sql_lex.cc:
  Auto merged
tests/mysql_client_test.c:
  Auto merged

  After merge fix


mysql-test/r/select.result:
  After merge fix

sql/item_timefunc.cc:
  Auto merged
sql/item_timefunc.h:
  Auto merged

into moonbone.local:/work/tmp_merge-5.0-opt-mysql


mysql-test/r/cast.result:
  Auto merged
mysql-test/r/func_str.result:
  Auto merged
mysql-test/t/func_str.test:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_strfunc.cc:
  Auto merged

configure.in:
  Auto merged
sql/item_timefunc.cc:
  Auto merged
sql/item_timefunc.h:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_lex.h:
  Auto merged
sql/sql_parse.cc:
  Auto merged

  Fix for bug#16716 for --ps-protocol mode.
item_cmpfunc.cc:
  Fix for a memory allocation/freeing problem in agg_cmp_type() after fix
for bug#16377. Few language corrections.


sql/item_cmpfunc.cc:
  Fix for a memory allocation/freeing problem in agg_cmp_type(). Few language corrections.
sql/item_strfunc.cc:
  Fix for bug#16716 for --ps-protocol mode.

into serg.mylan:/usr/home/serg/Abk/m51


sql/log.cc:
  Auto merged

into serg.mylan:/usr/home/serg/Abk/m51

into  mysql.com:/home/cps/mysql/devel/5.1-csv-remove-mmap

into  c-0409e253.1238-1-64736c10.cust.bredbandsbolaget.se:/home/pappa/mysql-5.1-fix

into  mysql.com:/Users/emurphy/src/mysql/clean/mysql-5.1

into  mysql.com:/home/stewart/Documents/MySQL/5.1/main


storage/ndb/src/mgmsrv/MgmtSrvr.cpp:
  Auto merged
storage/ndb/src/mgmsrv/MgmtSrvr.hpp:
  Auto merged
storage/ndb/src/mgmsrv/Services.cpp:
  Auto merged

into  mysql.com:/home/stewart/Documents/MySQL/5.0/main


ndb/src/mgmsrv/MgmtSrvr.cpp:
  Auto merged
ndb/src/mgmsrv/MgmtSrvr.hpp:
  Auto merged
ndb/src/mgmsrv/Services.cpp:
  Auto merged

into  mysql.com:/home/stewart/Documents/MySQL/5.1/main


storage/ndb/include/mgmapi/mgmapi.h:
  Auto merged
storage/ndb/src/mgmapi/mgmapi.cpp:
  Auto merged
storage/ndb/src/mgmclient/CommandInterpreter.cpp:
  Auto merged
storage/ndb/src/mgmsrv/MgmtSrvr.cpp:
  Auto merged
storage/ndb/src/mgmsrv/MgmtSrvr.hpp:
  Auto merged
storage/ndb/src/mgmsrv/Services.cpp:
  Auto merged
storage/ndb/src/mgmsrv/Services.hpp:
  Auto merged

fix Field::store(double) being used instead of store(longlong)

NB: overloading functions is evil

mysql-test/r/rpl_log.result:
  after-merge fix.
sql/ha_archive.cc:
  after-merge fix.
sql/item_func.cc:
  after-merge fix.
sql/sql_class.cc:
  after-merge fix.
sql/sql_class.h:
  after-merge fix.

into  mysql.com:/home/stewart/Documents/MySQL/5.1/main


mysql-test/r/ndb_condition_pushdown.result:
  Auto merged
mysql-test/r/type_newdecimal.result:
  Auto merged
mysql-test/r/view_grant.result:
  Auto merged
mysql-test/t/ndb_condition_pushdown.test:
  Auto merged
mysql-test/t/type_newdecimal.test:
  Auto merged
mysql-test/t/view_grant.test:
  Auto merged
sql/ha_ndbcluster.cc:
  Auto merged
sql/sql_parse.cc:
  Auto merged
mysql-test/valgrind.supp:
  Manual merge

into  mysql.com:/home/marty/MySQL/mysql-5.1


mysql-test/t/ndb_lock.test:
  Auto merged
sql/ha_ndbcluster.cc:
  Auto merged
storage/ndb/src/mgmsrv/Services.cpp:
  Auto merged
storage/ndb/src/ndbapi/NdbDictionaryImpl.cpp:
  Auto merged
storage/ndb/src/ndbapi/NdbDictionaryImpl.hpp:
  Auto merged
mysql-test/r/ndb_lock.result:
  Merge (using local)

win/build-vs71.bat:
  Don't trigger 'could not find the file specified' errors when 
  running from a clean clone.
win/build-vs8.bat:
  Don't trigger 'could not find the file specified' errors when 
  running from a clean clone.

into  rurik.mysql.com:/home/igor/mysql-5.0-opt


mysql-test/t/func_group.test:
  Auto merged
sql/field.cc:
  Auto merged
sql/opt_sum.cc:
  Auto merged
mysql-test/r/func_group.result:
  SCCS merged

into  rurik.mysql.com:/home/igor/mysql-5.0-opt


sql/field.cc:
  Auto merged
sql/opt_sum.cc:
  Auto merged

into serg.mylan:/usr/home/serg/Abk/m51


mysql-test/r/ctype_sjis.result:
  Auto merged
mysql-test/t/ctype_sjis.test:
  Auto merged
sql/sql_lex.cc:
  Auto merged
tests/mysql_client_test.c:
  Auto merged

into  mysql.com:/home/cps/mysql/devel/5.1-csv-remove-mmap

into serg.mylan:/usr/home/serg/Abk/m51