mariadb/mysql-test/suite/tokudb/t/cluster_2968-3.test

# test that the query planner picks clustering keys for 3 table joins

# create table s
--disable_warnings
drop table if exists s;
--enable_warnings
create table s (a int, b int, c int) engine=tokudb;

# populate table s
let $a = 10;
while ($a) {
    let $b = 10;
    while ($b) {
        let $c = 10;
        while ($c) {
            eval insert into s values ($a,$b,$c);
	    dec $c;
	}
	dec $b;
    }
    dec $a;
}
    
# create table t
--disable_warnings
drop table if exists t;
--enable_warnings
create table t like s;
insert into t select * from s;

# create table u;
--disable_warnings
drop table if exists u;
--enable_warnings
create table u like s;
insert into u select * from s;

# join with no keys
show create table s;
show create table t;
show create table u;
explain select straight_join * from s,t,u where s.b = t.b and s.c = t.c;

# join with uncovered keys
alter table s add key (b);
alter table t add key (b);
alter table u add key (c);
show create table s;
show create table t;
show create table u;
explain select straight_join * from s,t,u where s.b = t.b and s.c = u.c;

# join with clustering keys
alter table s add clustering key (b);
alter table t add clustering key (b);
alter table u add clustering key (c);
show create table s;
show create table t;
show create table u;
explain select straight_join * from s,t,u where s.b = t.b and s.c = u.c;

# cleanup
drop table s,t,u;