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Add TCL tests for subqueries in all positions of a SELECT
This commit is contained in:
Jussi Saurio
@@ -638,4 +638,189 @@ do_execsql_test_on_specific_db {:memory:} subquery-not-in-multiple-columns {
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select name, age from restricted_profiles
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);
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} {1|Alice|25
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3|Charlie|25}
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3|Charlie|25}
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# SUBQUERIES IN OTHER POSITIONS (result columns, GROUP BY, ORDER BY, HAVING, LIMIT, OFFSET)
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# Uncorrelated subquery in result column
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do_execsql_test_on_specific_db {:memory:} subquery-uncorrelated-in-result-column {
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create table employees(id, name, dept_id);
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create table company_info(total_depts);
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insert into employees values (1, 'Alice', 10), (2, 'Bob', 20);
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insert into company_info values (5);
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select id, name, (select total_depts from company_info) as total_depts from employees;
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} {1|Alice|5
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2|Bob|5}
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# Correlated subquery in result column
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do_execsql_test_on_specific_db {:memory:} subquery-correlated-in-result-column {
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create table employees(id, name, dept_id);
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create table departments(id, name);
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insert into employees values (1, 'Alice', 10), (2, 'Bob', 20);
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insert into departments values (10, 'Sales'), (20, 'Engineering');
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select id, name, (select name from departments where id = dept_id) as dept_name from employees;
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} {1|Alice|Sales
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2|Bob|Engineering}
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# Correlated subquery in result column with join
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do_execsql_test_on_specific_db {:memory:} subquery-correlated-in-result-column-with-join {
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create table employees(id, name, dept_id, manager_id);
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create table departments(id, name);
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create table managers(id, name);
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insert into employees values (1, 'Alice', 10, 100), (2, 'Bob', 20, 200);
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insert into departments values (10, 'Sales'), (20, 'Engineering');
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insert into managers values (100, 'Carol'), (200, 'Dave');
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select e.id, e.name, m.name as manager, (select name from departments where id = e.dept_id) as dept_name
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from employees e join managers m on e.manager_id = m.id;
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} {1|Alice|Carol|Sales
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2|Bob|Dave|Engineering}
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# Uncorrelated subquery in GROUP BY clause
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do_execsql_test_on_specific_db {:memory:} subquery-uncorrelated-in-group-by {
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create table sales(id, amount, region_id);
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create table grouping_config(group_column);
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insert into sales values (1, 100, 1), (2, 200, 1), (3, 150, 2);
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insert into grouping_config values ('region_id');
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select region_id, sum(amount)
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from sales
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group by (select case when group_column = 'region_id' then region_id else amount end from grouping_config);
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} {1|300
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2|150}
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# Correlated subquery in GROUP BY clause
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do_execsql_test_on_specific_db {:memory:} subquery-correlated-in-group-by {
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create table sales(id, amount, region_id);
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create table regions(id, name);
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insert into sales values (1, 100, 1), (2, 200, 1), (3, 150, 2);
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insert into regions values (1, 'North'), (2, 'South');
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select (select name from regions where id = region_id) as region, sum(amount)
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from sales
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group by (select name from regions where id = region_id);
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} {North|300
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South|150}
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# Correlated subquery in GROUP BY clause with join
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do_execsql_test_on_specific_db {:memory:} subquery-correlated-in-group-by-with-join {
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create table sales(id, amount, region_id, salesperson_id);
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create table regions(id, name);
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create table salespeople(id, name);
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insert into sales values (1, 100, 1, 10), (2, 200, 1, 20), (3, 150, 2, 10);
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insert into regions values (1, 'North'), (2, 'South');
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insert into salespeople values (10, 'Alice'), (20, 'Bob');
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select (select name from regions where id = s.region_id) as region, sp.name as salesperson, sum(amount)
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from sales s join salespeople sp on s.salesperson_id = sp.id
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group by (select name from regions where id = s.region_id), sp.name;
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} {North|Alice|100
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North|Bob|200
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South|Alice|150}
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# Uncorrelated subquery in ORDER BY clause
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do_execsql_test_on_specific_db {:memory:} subquery-uncorrelated-in-order-by {
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create table products(id, name, category_id);
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create table sort_config(sort_order);
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insert into products values (1, 'hat', 2), (2, 'laptop', 1), (3, 'book', 3);
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insert into sort_config values ('asc');
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select id, name from products
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order by (select case when sort_order = 'asc' then id else -id end from sort_config);
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} {1|hat
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2|laptop
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3|book}
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# Correlated subquery in ORDER BY clause
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do_execsql_test_on_specific_db {:memory:} subquery-correlated-in-order-by {
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create table products(id, name, category_id);
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create table categories(id, priority);
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insert into products values (1, 'hat', 2), (2, 'laptop', 1), (3, 'book', 3);
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insert into categories values (1, 10), (2, 20), (3, 5);
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select id, name from products
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order by (select priority from categories where id = category_id);
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} {3|book
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2|laptop
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1|hat}
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# Correlated subquery in ORDER BY clause with join
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do_execsql_test_on_specific_db {:memory:} subquery-correlated-in-order-by-with-join {
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create table products(id, name, category_id, supplier_id);
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create table categories(id, priority);
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create table suppliers(id, name);
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insert into products values (1, 'hat', 2, 100), (2, 'laptop', 1, 200), (3, 'book', 3, 100);
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insert into categories values (1, 10), (2, 20), (3, 5);
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insert into suppliers values (100, 'SupplierA'), (200, 'SupplierB');
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select p.id, p.name, s.name as supplier
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from products p join suppliers s on p.supplier_id = s.id
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order by (select priority from categories where id = p.category_id);
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} {3|book|SupplierA
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2|laptop|SupplierB
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1|hat|SupplierA}
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# Uncorrelated subquery in HAVING clause
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do_execsql_test_on_specific_db {:memory:} subquery-uncorrelated-in-having {
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create table orders(id, customer_id, amount);
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create table vip_threshold(min_amount);
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insert into orders values (1, 100, 50), (2, 100, 150), (3, 200, 30);
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insert into vip_threshold values (100);
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select customer_id, sum(amount) as total
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from orders
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group by customer_id
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having total > (select min_amount from vip_threshold);
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} {100|200}
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# Correlated subquery in HAVING clause
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do_execsql_test_on_specific_db {:memory:} subquery-correlated-in-having {
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create table orders(id, customer_id, amount);
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create table customer_thresholds(customer_id, min_amount);
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insert into orders values (1, 100, 50), (2, 100, 150), (3, 200, 30), (4, 200, 80);
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insert into customer_thresholds values (100, 100), (200, 150);
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select customer_id, sum(amount) as total
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from orders
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group by customer_id
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having total > (select min_amount from customer_thresholds where customer_thresholds.customer_id = orders.customer_id);
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} {100|200}
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# Correlated subquery in HAVING clause with join
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do_execsql_test_on_specific_db {:memory:} subquery-correlated-in-having-with-join {
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create table orders(id, customer_id, amount, region_id);
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create table customer_thresholds(customer_id, min_amount);
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create table regions(id, name);
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insert into orders values (1, 100, 50, 1), (2, 100, 150, 1), (3, 200, 30, 2), (4, 200, 80, 2);
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insert into customer_thresholds values (100, 100), (200, 150);
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insert into regions values (1, 'East'), (2, 'West');
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select o.customer_id, r.name as region, sum(o.amount) as total
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from orders o join regions r on o.region_id = r.id
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group by o.customer_id, r.name
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having total > (select min_amount from customer_thresholds where customer_thresholds.customer_id = o.customer_id);
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} {100|East|200}
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# Uncorrelated subquery in LIMIT clause
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do_execsql_test_on_specific_db {:memory:} subquery-in-limit {
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create table items(id, name);
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create table config(max_results);
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insert into items values (1, 'a'), (2, 'b'), (3, 'c'), (4, 'd');
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insert into config values (2);
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select * from items limit (select max_results from config);
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} {1|a
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2|b}
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# Uncorrelated subquery in OFFSET clause
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do_execsql_test_on_specific_db {:memory:} subquery-in-offset {
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create table items(id, name);
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create table config(skip_count);
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insert into items values (1, 'a'), (2, 'b'), (3, 'c');
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insert into config values (1);
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select * from items limit 2 offset (select skip_count from config);
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} {2|b
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3|c}
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