config root man

set @is_enable_default = @@global.ndb_index_stat_enable;
set @is_enable = 1;
set @is_enable = NULL;
# is_enable_on=0 is_enable_off=0
# ndb_index_stat_enable - before
show global variables like 'ndb_index_stat_enable';
Variable_name	Value
ndb_index_stat_enable	ON
show local variables like 'ndb_index_stat_enable';
Variable_name	Value
ndb_index_stat_enable	ON
# ndb_index_stat_enable - after
show global variables like 'ndb_index_stat_enable';
Variable_name	Value
ndb_index_stat_enable	ON
show local variables like 'ndb_index_stat_enable';
Variable_name	Value
ndb_index_stat_enable	ON
create table record_in_range(no int primary key auto_increment,
query varchar(256), part_count int, 
explain_rows int, count_rows int) engine = myisam;
CREATE TABLE t1(
K INT NOT NULL AUTO_INCREMENT,
I INT,
J INT,
L INT,
PRIMARY KEY(K),
KEY(I,J),
KEY(L)
) ENGINE=ndbcluster
partition by key (K) partitions 1;
INSERT INTO t1(I,J,L) VALUES
(1,1,1),(2,2,2),(3,3,3),(4,4,4),(5,5,5),
(6,6,6),(7,7,7),(8,8,8),(9,9,9),(0,0,0);
INSERT INTO t1(I,J,L) SELECT I,1,I FROM t1 ORDER BY K;
INSERT INTO t1(I,J,L) SELECT I,2,I FROM t1 ORDER BY K;
INSERT INTO t1(I,J,L) SELECT I,3,I FROM t1 ORDER BY K;
INSERT INTO t1(I,J,L) SELECT I,4,I FROM t1 ORDER BY K;
INSERT INTO t1(I,J,L) SELECT I,5,I FROM t1 ORDER BY K;
INSERT INTO t1(I,J,L) SELECT I,6,I FROM t1 ORDER BY K;
INSERT INTO t1(I,J,L) SELECT I,7,I FROM t1 ORDER BY K;
INSERT INTO t1(I,J,L) SELECT I,8,I FROM t1 ORDER BY K;
INSERT INTO t1(I,J,L) SELECT I,9,I FROM t1 ORDER BY K;
select i, count(*) from t1 group by 1 order by 1;
i	count(*)
0	512
1	512
2	512
3	512
4	512
5	512
6	512
7	512
8	512
9	512
select l, count(*) from t1 group by 1 order by 1;
l	count(*)
0	512
1	512
2	512
3	512
4	512
5	512
6	512
7	512
8	512
9	512
ANALYZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
select distinct 
substring(rr.query from INSTR(rr.query, 'WHERE')) as 'WHERE', 
count_rows, 
p1.val as p1_val, 
if(p8.err_pct is not null and abs(p8.err_pct)<45,'-',p8.val) p8_val,
case when p1.err_pct is null then '-' when abs(p1.err_pct)<45 then '<45' else p1.err_pct end p1_err_pct,
case when p8.err_pct is null then '-' when abs(p8.err_pct)<45 then '<45' else p8.err_pct end p8_err_pct
from record_in_range rr,
(select query, explain_rows as val, if(count_rows>0,floor(100*(explain_rows - count_rows) / count_rows),NULL) err_pct
from record_in_range p where part_count = 1) p1,
(select query, explain_rows as val, if(count_rows>0,floor(100*(explain_rows - count_rows) / count_rows),NULL) err_pct
from record_in_range p where part_count = 8) p8
where rr.query = p1.query
and rr.query = p8.query
order by rr.no;
WHERE	count_rows	p1_val	p8_val	p1_err_pct	p8_err_pct
WHERE i = 10	0	2	2	-	-
WHERE i = 9	512	512	-	<45	<45
WHERE i = 8	512	512	-	<45	<45
WHERE i = 7	512	512	-	<45	<45
WHERE i = 6	512	512	-	<45	<45
WHERE i = 5	512	512	-	<45	<45
WHERE i = 4	512	512	-	<45	<45
WHERE i = 3	512	512	-	<45	<45
WHERE i = 2	512	512	-	<45	<45
WHERE i = 1	512	512	-	<45	<45
WHERE l = 10	0	2	2	-	-
WHERE l = 9	512	512	-	<45	<45
WHERE l = 8	512	512	-	<45	<45
WHERE l = 7	512	512	-	<45	<45
WHERE l = 6	512	512	-	<45	<45
WHERE l = 5	512	512	-	<45	<45
WHERE l = 4	512	512	-	<45	<45
WHERE l = 3	512	512	-	<45	<45
WHERE l = 2	512	512	-	<45	<45
WHERE l = 1	512	512	-	<45	<45
DROP TABLE t1, record_in_range;
End of 5.1 tests
set @is_enable = @is_enable_default;
set @is_enable = NULL;
# is_enable_on=0 is_enable_off=0
# ndb_index_stat_enable - before
show global variables like 'ndb_index_stat_enable';
Variable_name	Value
ndb_index_stat_enable	ON
show local variables like 'ndb_index_stat_enable';
Variable_name	Value
ndb_index_stat_enable	ON
# ndb_index_stat_enable - after
show global variables like 'ndb_index_stat_enable';
Variable_name	Value
ndb_index_stat_enable	ON
show local variables like 'ndb_index_stat_enable';
Variable_name	Value
ndb_index_stat_enable	ON