set global innodb_stats_method = default;
select @@innodb_stats_method;
@@innodb_stats_method
nulls_equal
select count(*) from bug30243_3 where org_id is not NULL;
count(*)
20
select count(*) from bug30243_3 where org_id is NULL;
count(*)
16384
select count(*) from bug30243_2 where org_id is not NULL;
count(*)
224
select count(*) from bug30243_2 where org_id is NULL;
count(*)
65536
select @@innodb_stats_method;
@@innodb_stats_method
nulls_equal
analyze table bug30243_1;
Table	Op	Msg_type	Msg_text
test.bug30243_1	analyze	status	Engine-independent statistics collected
test.bug30243_1	analyze	status	OK
analyze table bug30243_2;
Table	Op	Msg_type	Msg_text
test.bug30243_2	analyze	status	Engine-independent statistics collected
test.bug30243_2	analyze	status	OK
analyze table bug30243_3;
Table	Op	Msg_type	Msg_text
test.bug30243_3	analyze	status	Engine-independent statistics collected
test.bug30243_3	analyze	status	OK
set global innodb_stats_method = "NULL";
ERROR 42000: Variable 'innodb_stats_method' can't be set to the value of 'NULL'
set global innodb_stats_method = "nulls_ignored";
select @@innodb_stats_method;
@@innodb_stats_method
nulls_ignored
analyze table bug30243_1;
Table	Op	Msg_type	Msg_text
test.bug30243_1	analyze	status	Engine-independent statistics collected
test.bug30243_1	analyze	status	OK
analyze table bug30243_2;
Table	Op	Msg_type	Msg_text
test.bug30243_2	analyze	status	Engine-independent statistics collected
test.bug30243_2	analyze	status	OK
analyze table bug30243_3;
Table	Op	Msg_type	Msg_text
test.bug30243_3	analyze	status	Engine-independent statistics collected
test.bug30243_3	analyze	status	OK
explain SELECT COUNT(*), 0
FROM bug30243_1 orgs
LEFT JOIN bug30243_3 sa_opportunities
ON orgs.org_id=sa_opportunities.org_id
LEFT JOIN bug30243_2 contacts
ON orgs.org_id=contacts.org_id ;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	orgs	index	NULL	org_id	4	NULL	ROWS	Using index
1	SIMPLE	sa_opportunities	ref	org_id	org_id	5	test.orgs.org_id	ROWS	Using index
1	SIMPLE	contacts	ref	contacts$org_id	contacts$org_id	5	test.orgs.org_id	ROWS	Using index
select @@innodb_stats_method;
@@innodb_stats_method
nulls_ignored
set global innodb_stats_method = "nulls_unequal";
select @@innodb_stats_method;
@@innodb_stats_method
nulls_unequal
analyze table bug30243_1;
Table	Op	Msg_type	Msg_text
test.bug30243_1	analyze	status	Engine-independent statistics collected
test.bug30243_1	analyze	status	OK
analyze table bug30243_2;
Table	Op	Msg_type	Msg_text
test.bug30243_2	analyze	status	Engine-independent statistics collected
test.bug30243_2	analyze	status	OK
analyze table bug30243_3;
Table	Op	Msg_type	Msg_text
test.bug30243_3	analyze	status	Engine-independent statistics collected
test.bug30243_3	analyze	status	OK
explain SELECT COUNT(*), 0
FROM bug30243_1 orgs
LEFT JOIN bug30243_3 sa_opportunities
ON orgs.org_id=sa_opportunities.org_id
LEFT JOIN bug30243_2 contacts
ON orgs.org_id=contacts.org_id;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	orgs	index	NULL	org_id	4	NULL	ROWS	Using index
1	SIMPLE	sa_opportunities	ref	org_id	org_id	5	test.orgs.org_id	ROWS	Using index
1	SIMPLE	contacts	ref	contacts$org_id	contacts$org_id	5	test.orgs.org_id	ROWS	Using index
SELECT COUNT(*) FROM table_bug30423 WHERE org_id IS NULL;
COUNT(*)
1024
set global innodb_stats_method = "nulls_unequal";
analyze table table_bug30423;
Table	Op	Msg_type	Msg_text
test.table_bug30423	analyze	status	Engine-independent statistics collected
test.table_bug30423	analyze	status	OK
set global innodb_stats_method = "nulls_ignored";
analyze table table_bug30423;
Table	Op	Msg_type	Msg_text
test.table_bug30423	analyze	status	Engine-independent statistics collected
test.table_bug30423	analyze	status	OK
set global innodb_stats_method = nulls_equal;
drop table bug30243_2;
drop table bug30243_1;
drop table bug30243_3;
drop table table_bug30423;