create table test_gcol_index (
i int not null primary key,
j int generated always as (100+mod(i,10)) stored unique
) engine = 'ndbcluster';
insert into test_gcol_index
values
(1, default),
(2, default),
(3, default),
(4, default),
(5, default),
(6, default),
(7, default),
(8, default),
(9, default);
select * from test_gcol_index where i = 4;
i	j
4	104
select * from test_gcol_index where j = 104;
i	j
4	104
explain select * from test_gcol_index where j = 104;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	test_gcol_index	p0,p1,p2,p3,p4,p5,p6,p7	eq_ref	j	j	5	const	1	100.00	NULL
Warnings:
Note	1003	/* select#1 */ select `test`.`test_gcol_index`.`i` AS `i`,`test`.`test_gcol_index`.`j` AS `j` from `test`.`test_gcol_index` where (`test`.`test_gcol_index`.`j` = 104)
select * from test_gcol_index where j > 106 order by j;
i	j
7	107
8	108
9	109
explain select * from test_gcol_index where j > 106;
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	test_gcol_index	p0,p1,p2,p3,p4,p5,p6,p7	range	j	j	5	NULL	3	100.00	Using pushed condition (`test`.`test_gcol_index`.`j` > 106); Using MRR
Warnings:
Note	1003	/* select#1 */ select `test`.`test_gcol_index`.`i` AS `i`,`test`.`test_gcol_index`.`j` AS `j` from `test`.`test_gcol_index` where (`test`.`test_gcol_index`.`j` > 106)
insert into test_gcol_index values(13, default);
ERROR 23000: Duplicate entry '103' for key 'j'
drop table test_gcol_index;