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Gleb Shchepa 33cd911a16 Bug : Table scan when NULL appears in IN clause 
SELECT ... WHERE ... IN (NULL, ...) does full table scan,
even if the same query without the NULL uses efficient range scan.

The bugfix for the bug 18360 introduced an optimization:
if
  1) all right-hand arguments of the IN function are constants
  2) result types of all right argument items are compatible
     enough to use the same single comparison function to
     compare all of them to the left argument,

then

  we can convert the right-hand list of constant items to an array
  of equally-typed constant values for the further
  QUICK index access etc. (see Item_func_in::fix_length_and_dec()).

The Item_null constant item objects have STRING_RESULT
result types, so, as far as Item_func_in::fix_length_and_dec()
is aware of NULLs in the right list, this improvement efficiently
optimizes IN function calls with a mixed right list of NULLs and
string constants. However, the optimization doesn't affect mixed
lists of NULLs and integers, floats etc., because there is no
unique common comparator.


New optimization has been added to ignore the result type
of NULL constants in the static analysis of mixed right-hand lists.
This is safe, because at the execution phase we care about
presence of NULLs anyway.

1. The collect_cmp_types() function has been modified to optionally
   ignore NULL constants in the item list.
2. NULL-skipping code of the Item_func_in::fix_length_and_dec()
   function has been modified to work not only with in_string
   vectors but with in_vectors of other types.


mysql-test/r/func_in.result:
  Added test case for the bug .
mysql-test/t/func_in.test:
  Added test case for the bug .
sql/item_cmpfunc.cc:
  Bug : Table scan when NULL appears in IN clause
  
  1. The collect_cmp_types() function has been modified to optionally
     ignore NULL constants in the item list.
  2. NULL-skipping code of the Item_func_in::fix_length_and_dec()
     function has been modified to work not only with in_string
     vectors but with in_vectors of other types.
2009-10-05 10:27:36 +05:00
..
examples Bug Parenthesis (and other) warnings compiling MySQL 2009-06-17 15:54:01 +02:00
share WL#4259 - Debug Sync Facility 2009-09-29 17:38:40 +02:00
.cvsignore
add_errmsg
authors.h
client_settings.h Bug#46013: rpl_extraColmaster_myisam fails on pb2 2009-08-13 17:07:20 -03:00
CMakeLists.txt WL#4259 - Debug Sync Facility 2009-09-29 17:38:40 +02:00
contributors.h
custom_conf.h
debug_sync.cc Fixed a valgrind error in debug_sync 2009-10-04 12:53:02 +03:00
debug_sync.h WL#4259 - Debug Sync Facility 2009-09-29 17:38:40 +02:00
derror.cc
des_key_file.cc
discover.cc
event_data_objects.cc Merge from 5.0 2009-07-24 21:04:55 +05:00
event_data_objects.h Bug#35997 Event scheduler seems to let the server crash, if it is embedded. 2008-05-09 09:43:02 +02:00
event_db_repository.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
event_db_repository.h
event_parse_data.cc Bug#29125 Windows Server X64: so many compiler warnings 2009-02-13 11:41:47 -05:00
event_parse_data.h Added "Sun Microsystems, Inc." to copyright headers on files modified 2008-11-10 21:21:49 +01:00
event_queue.cc Bug#35997 Event scheduler seems to let the server crash, if it is embedded. 2008-05-09 09:43:02 +02:00
event_queue.h
event_scheduler.cc Bug#43587: Putting event_scheduler=1 in init SQL file crashes 2009-07-24 15:45:42 -03:00
event_scheduler.h
events.cc Bug Restore of database with events produces warning in replication 2009-08-29 16:52:22 +08:00
events.h
field.cc Bug#45567: Fast ALTER TABLE broken for enum and set 2009-09-29 07:58:42 -03:00
field.h Bug#45567: Fast ALTER TABLE broken for enum and set 2009-09-29 07:58:42 -03:00
field_conv.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-06-17 15:54:01 +02:00
filesort.cc Bug : Assertion `m_status == DA_ERROR' failed in Diagnostics_area::sql_errno 2009-01-09 14:04:47 +02:00
frm_crypt.cc
gen_lex_hash.cc Bug#29125 Windows Server X64: so many compiler warnings 2009-02-13 11:41:47 -05:00
gstream.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-06-09 18:11:21 +02:00
gstream.h
ha_ndbcluster.cc A patch for Bug#47474 (mysqld hits Dbug_violation_helper assert 2009-09-23 17:10:23 +04:00
ha_ndbcluster.h
ha_ndbcluster_binlog.cc A patch for Bug#47474 (mysqld hits Dbug_violation_helper assert 2009-09-23 17:10:23 +04:00
ha_ndbcluster_binlog.h
ha_ndbcluster_cond.cc fixed warnings and compile errors from the fix for bug 26243 2008-03-29 09:52:16 +02:00
ha_ndbcluster_cond.h Merge mysql.com:/misc/mysql/34749/50-34749 2008-03-10 07:07:56 +01:00
ha_ndbcluster_tables.h
ha_partition.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
ha_partition.h Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
handler.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
handler.h Bug#46760: Fast ALTER TABLE no longer works for InnoDB 2009-09-18 16:01:18 +03:00
hash_filo.cc
hash_filo.h
hostname.cc
init.cc Merge zippy.cornsilk.net:/home/cmiller/work/mysql/bug26294/my50-bug26294 2008-04-03 13:14:57 -04:00
item.cc Bug#47150 Assertion in Field_long::val_int() on MERGE + TRIGGER + multi-table UPDATE 2009-09-29 07:23:38 +05:00
item.h Manual merge between bug#46362 and bug#20577. 2009-08-28 12:55:59 +02:00
item_buff.cc
item_cmpfunc.cc Bug : Table scan when NULL appears in IN clause 2009-10-05 10:27:36 +05:00
item_cmpfunc.h rollback of bug fix 2008-12-12 15:13:11 +04:00
item_create.cc Merge from 5.0 for 43414 2009-08-28 18:21:54 +02:00
item_create.h
item_func.cc merged compilation warning fixes 2009-09-24 16:28:13 +03:00
item_func.h Bug#45261: Crash, stored procedure + decimal 2009-08-24 16:47:08 -03:00
item_geofunc.cc Bug#44684: valgrind reports invalid reads in 2009-06-17 16:58:33 +02:00
item_geofunc.h Fix for Bug#30217: Views: changes in metadata behaviour 2008-02-22 13:30:33 +03:00
item_row.cc Fix for Bug#30217: Views: changes in metadata behaviour 2008-02-22 13:30:33 +03:00
item_row.h Fix for Bug#30217: Views: changes in metadata behaviour 2008-02-22 13:30:33 +03:00
item_strfunc.cc 5.0-bugteam->5.1-bugteam merge 2009-09-10 15:30:03 +05:00
item_strfunc.h Manual merge. 2009-06-01 16:00:38 +04:00
item_subselect.cc Fix for bug#46629: Item_in_subselect::val_int(): Assertion `0' 2009-09-04 13:14:54 +05:00
item_subselect.h Fix for Bug#30217: Views: changes in metadata behaviour 2008-02-22 13:30:33 +03:00
item_sum.cc Bug#45261: Crash, stored procedure + decimal 2009-08-24 16:47:08 -03:00
item_sum.h backported the fix for bug to 5.0 2008-12-09 20:35:02 +02:00
item_timefunc.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
item_timefunc.h Auto-merge up from 5.0 2009-02-07 16:50:31 +01:00
item_xmlfunc.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
item_xmlfunc.h
key.cc Bug#37721: ORDER BY when WHERE contains non-partitioned 2008-10-10 12:01:01 +02:00
lex.h Bug#45829 "CREATE TABLE TRANSACTIONAL PAGE_CHECKSUM ROW_FORMAT=PAGE accepted, does nothing": 2009-07-29 10:54:20 +02:00
lex_symbol.h
lock.cc Merge from 5.0 for 43414 2009-08-28 18:21:54 +02:00
log.cc Fix for bug#47130: misplaced or redundant check for null pointer? 2009-09-11 22:06:27 +05:00
log.h BUG#43929 binlog corruption when max_binlog_cache_size is exceeded 2009-06-18 14:52:46 +01:00
log_event.cc auto-merge 2009-09-29 06:08:18 -07:00
log_event.h Bug#43746: YACC return wrong query string when parse 'load data infile' sql statement 2009-09-28 05:41:10 -07:00
log_event_old.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
log_event_old.h
Makefile.am WL#4259 - Debug Sync Facility 2009-09-29 17:38:40 +02:00
message.h Bug#40280: Message compiler(mc.exe) needed to compile MySQL on windows. 2008-10-23 15:28:53 +02:00
message.mc Bug#40280: Message compiler(mc.exe) needed to compile MySQL on windows. 2008-10-23 15:28:53 +02:00
message.rc Bug#40280: Message compiler(mc.exe) needed to compile MySQL on windows. 2008-10-23 15:28:53 +02:00
mf_iocache.cc
MSG00001.bin Bug#40280: Message compiler(mc.exe) needed to compile MySQL on windows. 2008-10-23 15:28:53 +02:00
my_decimal.cc auto-merge 2008-11-27 12:33:04 +01:00
my_decimal.h Bug#45261: Crash, stored procedure + decimal 2009-08-24 16:47:08 -03:00
my_lock.c
mysql_priv.h Bug#32430: 'show innodb status' causes errors 2009-09-25 11:26:49 +02:00
mysql_priv.h.pp WL#4380 2008-06-17 17:57:04 +05:30
mysqld.cc WL#4259 - Debug Sync Facility 2009-09-29 17:38:40 +02:00
mysqld_suffix.h
net_serv.cc Manual merge. 2009-07-28 22:44:28 +04:00
nt_servc.cc merge 2008-11-22 01:10:38 +01:00
nt_servc.h merge 2008-11-22 01:10:38 +01:00
opt_range.cc Merge from 5.1-bugteam 2009-08-30 19:01:48 +02:00
opt_range.h Merge BUG#36639 into 5.1 2008-08-25 21:18:22 +04:00
opt_sum.cc Merge from 5.0-bugteam for 43414 2009-06-09 18:44:26 +02:00
parse_file.cc Bug#44834 strxnmov is expected to behave as you'd expect 2009-06-19 13:24:43 +05:00
parse_file.h Bug#43385 Cannot ALTER DATABASE ... UPGRADE DATA DIRECTORY NAME when Views exist(addon) 2009-04-13 18:09:10 +05:00
partition_element.h
partition_info.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
partition_info.h fixed a valgrind warning in partition_pruning 2009-09-02 18:42:08 +03:00
password.c Manual merge. 2009-06-01 16:00:38 +04:00
procedure.cc
procedure.h Merge magare.gmz:/home/kgeorge/mysql/autopush/B26461-5.0-opt 2008-03-21 17:48:28 +02:00
protocol.cc Bug#44521 Executing a stored procedure as a prepared statement can sometimes cause 2009-07-29 22:07:08 +02:00
protocol.h Bug#44521 Executing a stored procedure as a prepared statement can sometimes cause 2009-07-29 22:07:08 +02:00
records.cc Merge fix for BUG#35478 into 5.1 2008-07-15 21:46:02 +04:00
repl_failsafe.cc A patch for Bug#47474 (mysqld hits Dbug_violation_helper assert 2009-09-23 17:10:23 +04:00
repl_failsafe.h
rpl_constants.h BUG#40482: server/mysqlbinlog crashes when reading invalid Incident_log_event 2008-12-29 17:04:10 +01:00
rpl_filter.cc A patch for Bug#45118 (mysqld.exe crashed in debug mode 2009-09-10 11:40:57 +04:00
rpl_filter.h
rpl_injector.cc
rpl_injector.h
rpl_mi.cc
rpl_mi.h
rpl_record.cc BUG#39753: Replication failure on MIXED + bit + myisam + no PK 2009-03-05 20:54:53 +01:00
rpl_record.h
rpl_record_old.cc
rpl_record_old.h
rpl_reporting.cc BUG#45511 rpl.rpl_binlog_corruption fails with warning messages in Valgrind 2009-06-16 16:04:30 +01:00
rpl_reporting.h BUG#45511 rpl.rpl_binlog_corruption fails with warning messages in Valgrind 2009-06-16 16:04:30 +01:00
rpl_rli.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
rpl_rli.h BUG#38174 secure-file-priv breaks LOAD DATA INFILE replication in statement mode 2009-02-21 09:36:07 +00:00
rpl_tblmap.cc Bug#31455 mysqlbinlog don't print user readable info about RBR events 2008-08-20 19:06:31 +05:00
rpl_tblmap.h Bug#31455 mysqlbinlog don't print user readable info about RBR events 2008-08-20 19:06:31 +05:00
rpl_utility.cc BUG#37426: RBR breaks for CHAR() UTF-8 fields > 85 chars 2008-06-30 22:11:18 +02:00
rpl_utility.h Bug#42977 RBR logs for rows with more than 250 column results in corrupt binlog 2009-03-25 12:53:56 +02:00
scheduler.cc
scheduler.h
set_var.cc WL#4259 - Debug Sync Facility 2009-09-29 17:38:40 +02:00
set_var.h WL#4259 - Debug Sync Facility 2009-09-29 17:38:40 +02:00
slave.cc Manual merge. 2009-09-30 19:25:06 -03:00
slave.h BUG#44581 Slave stops when transaction with non-transactional table gets lock wait 2009-07-06 09:02:14 +01:00
sp.cc BUG#41166 stored function requires "deterministic" if binlog_format is "statement" 2009-07-28 18:44:38 +01:00
sp.h BUG#41166 stored function requires "deterministic" if binlog_format is "statement" 2009-07-28 18:44:38 +01:00
sp_cache.cc A fix for 2008-07-03 23:41:22 +04:00
sp_cache.h A fix for 2008-07-03 23:41:22 +04:00
sp_head.cc Bug#44521 Executing a stored procedure as a prepared statement can sometimes cause 2009-07-29 22:07:08 +02:00
sp_head.h merging 2009-04-29 07:59:10 +05:00
sp_pcontext.cc merging 2009-04-29 07:59:10 +05:00
sp_pcontext.h merging 2009-04-29 07:59:10 +05:00
sp_rcontext.cc
sp_rcontext.h
spatial.cc Merge from 5.0 for 43414 2009-08-28 18:21:54 +02:00
spatial.h Merge from 5.0-bugteam 2009-06-17 16:56:44 +02:00
sql_acl.cc Bug#35996: SELECT + SHOW VIEW should be enough to display 2009-09-28 13:25:47 +02:00
sql_acl.h Bug#44658 Create procedure makes server crash when user does not have ALL privilege 2009-05-29 15:37:54 +02:00
sql_analyse.cc Merge from 5.0-bugteam 2009-06-17 16:56:44 +02:00
sql_analyse.h Merge magare.gmz:/home/kgeorge/mysql/autopush/B26461-5.0-opt 2008-03-21 17:48:28 +02:00
sql_array.h
sql_base.cc auto-merge 2009-10-02 13:27:48 +02:00
sql_binlog.cc BUG#41924: high-level replication functions are not commented 2009-01-09 13:49:24 +01:00
sql_bitmap.h
sql_builtin.cc.in
sql_cache.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
sql_cache.h Bug#43758 Query cache can lock up threads in 'freeing items' state 2009-06-16 10:34:47 +02:00
sql_class.cc WL#4259 - Debug Sync Facility 2009-09-29 17:38:40 +02:00
sql_class.h auto-merge 2009-10-01 15:54:11 +02:00
sql_client.cc
sql_connect.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
sql_crypt.cc Bug#44358 valgrind errors with decode() function 2009-04-23 12:43:42 +05:00
sql_crypt.h Bug#44358 valgrind errors with decode() function 2009-04-23 12:43:42 +05:00
sql_cursor.cc 5.0-bugteam->5.1-bugteam merge 2008-12-10 18:16:21 +04:00
sql_cursor.h
sql_db.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
sql_delete.cc Bug#46958: Assertion in Diagnostics_area::set_ok_status, 2009-09-28 12:48:52 +02:00
sql_derived.cc merged 5.0-bugteam to 5.1-bugteam 2009-05-27 18:19:44 +03:00
sql_do.cc
sql_error.cc Bug#29125 Windows Server X64: so many compiler warnings 2009-02-13 11:41:47 -05:00
sql_error.h
sql_handler.cc Merge from 5.0 2009-09-17 17:25:52 +02:00
sql_help.cc Merge from 5.0-bugteam 2009-06-17 16:56:44 +02:00
sql_insert.cc A patch for Bug#45118 (mysqld.exe crashed in debug mode 2009-09-10 11:40:57 +04:00
sql_lex.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-17 17:10:30 +02:00
sql_lex.h Bug#43746: YACC return wrong query string when parse 'load data infile' sql statement 2009-09-28 05:41:10 -07:00
sql_list.cc
sql_list.h Backport WL#3653 to 5.1 to enable bundled innodb plugin. 2009-06-10 10:59:49 +02:00
sql_load.cc Bug#43746: YACC return wrong query string when parse 'load data infile' sql statement 2009-09-28 05:41:10 -07:00
sql_locale.cc Bug#37575 UCASE fails on monthname 2008-12-23 18:08:04 +04:00
sql_manager.cc Bug#38522: 5 seconds delay when closing application using embedded server 2008-12-04 19:41:53 +01:00
sql_map.cc
sql_map.h
sql_olap.cc
sql_parse.cc Manual merge. 2009-09-30 20:06:08 -03:00
sql_partition.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
sql_partition.h
sql_plugin.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
sql_plugin.h Bug#19027 MySQL 5.0 starts even with Fatal InnoDB errors 2009-05-14 14:03:33 +02:00
sql_prepare.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-08-28 17:51:31 +02:00
sql_profile.cc Bug : phase 2 : 5.0 64 bit compilation warnings 2009-07-16 15:37:38 +03:00
sql_profile.h Backport WL#3653 to 5.1 to enable bundled innodb plugin. 2009-06-10 10:59:49 +02:00
sql_rename.cc Bug#44834 strxnmov is expected to behave as you'd expect 2009-06-19 13:24:43 +05:00
sql_repl.cc Bug Log event that larger than max_allowed_packet results in stop of slave I/O thread, 2009-09-18 16:20:29 +08:00
sql_repl.h Merge dl145h.mysql.com:/data0/mkindahl/mysql-5.0-rpl 2008-03-14 18:38:54 +01:00
sql_select.cc merge 2009-09-28 16:48:40 +03:00
sql_select.h automerge 2009-07-16 16:17:47 +03:00
sql_servers.cc fixed compilation warnings. addendum to the fix for bug 29125 2009-03-20 16:27:53 +02:00
sql_servers.h
sql_show.cc Merge of Bug#35996 2009-09-30 09:31:20 +02:00
sql_show.h Added "Sun Microsystems, Inc." to copyright headers on files modified 2008-11-10 21:21:49 +01:00
sql_sort.h
sql_state.c
sql_string.cc Bug# 30946: mysqldump silently ignores --default-character-set 2009-07-31 22:14:52 +05:00
sql_string.h Bug# 30946: mysqldump silently ignores --default-character-set 2009-07-31 22:14:52 +05:00
sql_table.cc merge 2009-09-29 10:12:04 +02:00
sql_tablespace.cc
sql_test.cc Bug#44164: TL_WRITE has no description in lock_descriptions[] 2009-04-14 14:05:32 +02:00
sql_trigger.cc Merge from 5.0-bugteam 2009-06-17 16:56:44 +02:00
sql_trigger.h Fix for 2009-01-14 18:50:51 +04:00
sql_udf.cc Bug#29125 Windows Server X64: so many compiler warnings 2009-02-13 11:41:47 -05:00
sql_udf.h
sql_union.cc 5.0-bugteam->5.1-bugteam merge 2009-05-15 12:11:07 +05:00
sql_update.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-08-28 17:51:31 +02:00
sql_view.cc Merge from 5.0 for 43414 2009-08-28 18:21:54 +02:00
sql_view.h Bug#43385 Cannot ALTER DATABASE ... UPGRADE DATA DIRECTORY NAME when Views exist(addon) 2009-04-13 18:09:10 +05:00
sql_yacc.yy Bug#34895 'show procedure status' or 'show function status' + 2009-09-30 14:50:25 +02:00
strfunc.cc Bug Parenthesis (and other) warnings compiling MySQL 2009-09-23 15:21:29 +02:00
structs.h Bug#45266: Uninitialized variable lead to an empty result. 2009-06-26 19:57:42 +00:00
table.cc Bug#35996: SELECT + SHOW VIEW should be enough to display 2009-09-28 13:25:47 +02:00
table.h reverted the fix for bug from 5.1-bugteam 2009-08-21 17:41:48 +03:00
thr_malloc.cc Merge from 5.0 2009-06-29 16:00:47 +02:00
time.cc Merge from 5.0-bugteam 2009-06-17 16:56:44 +02:00
tzfile.h
tztime.cc Merge from 5.0-bugteam 2009-06-17 16:56:44 +02:00
tztime.h Backport of a 5.0.74 fix into 5.0.72sp1: 2009-01-12 17:40:29 +01:00
udf_example.c Merge from 5.0 2009-09-17 17:25:52 +02:00
udf_example.def
uniques.cc Merge from 5.0-bugteam 2009-06-17 16:56:44 +02:00
unireg.cc BUG#46483 - drop table of partitioned table may leave 2009-09-02 16:19:28 +05:00
unireg.h Auto-merge 2009-07-31 15:28:15 -04:00