ClickHouse/tests/queries/0_stateless/00847_multiple_join_same_column.sql

drop table if exists t;
drop table if exists s;
drop table if exists y;

create table t(a Int64, b Int64) engine = TinyLog;
create table s(a Int64, b Int64) engine = TinyLog;
create table y(a Int64, b Int64) engine = TinyLog;

insert into t values (1,1), (2,2);
insert into s values (1,1);
insert into y values (1,1);

select t.a, s.b, s.a, s.b, y.a, y.b from t
left join s on (t.a = s.a and t.b = s.b)
left join y on (y.a = s.a and y.b = s.b)
order by t.a
format Vertical;

select t.a, s.b, s.a, s.b, y.a, y.b from t
left join s on (t.a = s.a and s.b = t.b)
left join y on (y.a = s.a and y.b = s.b)
order by t.a
format PrettyCompactNoEscapes;

select t.a as t_a from t
left join s on s.a = t_a
order by t.a
format PrettyCompactNoEscapes;

select t.a, s.a as s_a from t
left join s on s.a = t.a
left join y on y.b = s.b
order by t.a
format PrettyCompactNoEscapes;

select t.a, t.a, t.b as t_b from t
left join s on t.a = s.a
left join y on y.b = s.b
order by t.a
format PrettyCompactNoEscapes;

set multiple_joins_rewriter_version = 1;

select s.a, s.a, s.b as s_b, s.b from t
left join s on s.a = t.a
left join y on s.b = y.b
order by t.a
format PrettyCompactNoEscapes;

select y.a, y.a, y.b as y_b, y.b from t
left join s on s.a = t.a
left join y on y.b = s.b
order by t.a
format PrettyCompactNoEscapes;

select t.a, t.a as t_a, s.a, s.a as s_a, y.a, y.a as y_a from t
left join s on t.a = s.a
left join y on y.b = s.b
order by t.a
format PrettyCompactNoEscapes;

set multiple_joins_rewriter_version = 2;

select s.a, s.a, s.b as s_b, s.b from t
left join s on s.a = t.a
left join y on s.b = y.b
order by t.a
format PrettyCompactNoEscapes;

select y.a, y.a, y.b as y_b, y.b from t
left join s on s.a = t.a
left join y on y.b = s.b
order by t.a
format PrettyCompactNoEscapes;

select t.a, t.a as t_a, s.a, s.a as s_a, y.a, y.a as y_a from t
left join s on t.a = s.a
left join y on y.b = s.b
order by t.a
format PrettyCompactNoEscapes;

drop table t;
drop table s;
drop table y;