| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.drill; |
| |
| import org.apache.drill.categories.OperatorTest; |
| import org.apache.drill.categories.SqlTest; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| @Category({SqlTest.class, OperatorTest.class}) |
| public class TestCorrelation extends PlanTestBase { |
| |
| @Test // DRILL-2962 |
| public void testScalarAggCorrelatedSubquery() throws Exception { |
| String query = "select count(*) as cnt from cp.`tpch/nation.parquet` n1 " |
| + " where n1.n_nationkey > (select avg(n2.n_regionkey) * 4 from cp.`tpch/nation.parquet` n2 " |
| + " where n1.n_regionkey = n2.n_nationkey)"; |
| |
| testBuilder() |
| .sqlQuery(query) |
| .ordered() |
| .baselineColumns("cnt") |
| .baselineValues((long) 17) |
| .build() |
| .run(); |
| } |
| |
| @Test // DRILL-2949 |
| public void testScalarAggAndFilterCorrelatedSubquery() throws Exception { |
| String query = "select count(*) as cnt from cp.`tpch/nation.parquet` n1, " |
| + " cp.`tpch/region.parquet` r1 where n1.n_regionkey = r1.r_regionkey and " |
| + " r1.r_regionkey < 3 and " |
| + " n1.n_nationkey > (select avg(n2.n_regionkey) * 4 from cp.`tpch/nation.parquet` n2 " |
| + " where n1.n_regionkey = n2.n_nationkey)"; |
| |
| testBuilder() |
| .sqlQuery(query) |
| .ordered() |
| .baselineColumns("cnt") |
| .baselineValues((long) 11) |
| .build() |
| .run(); |
| } |
| |
| @Test |
| public void testExistsScalarSubquery() throws Exception { |
| String query = |
| "SELECT employee_id\n" + |
| "FROM cp.`employee.json`\n" + |
| "WHERE EXISTS\n" + |
| " (SELECT *\n" + |
| " FROM cp.`employee.json` cs2\n" + |
| " )\n" + |
| "limit 1"; |
| |
| testBuilder() |
| .sqlQuery(query) |
| .unOrdered() |
| .baselineColumns("employee_id") |
| .baselineValues(1L) |
| .go(); |
| } |
| |
| @Test |
| public void testSeveralExistsCorrelateSubquery() throws Exception { |
| String query = |
| "SELECT cs1.employee_id\n" + |
| "FROM cp.`employee.json` cs1,\n" + |
| " cp.`employee.json` cs3\n" + |
| "WHERE cs1.hire_date = cs3.hire_date\n" + |
| " AND EXISTS\n" + |
| " (SELECT *\n" + |
| " FROM cp.`employee.json` cs2\n" + |
| " WHERE " + |
| " cs1.position_id > cs2.position_id\n" + |
| " AND" + |
| " cs1.epmloyee_id = cs2.epmloyee_id" + |
| " )\n" + |
| " AND EXISTS\n" + |
| " (SELECT *\n" + |
| " FROM cp.`employee.json` cr1\n" + |
| " WHERE cs1.position_id = cr1.position_id)\n" + |
| "LIMIT 1"; |
| |
| testBuilder() |
| .sqlQuery(query) |
| .unOrdered() |
| .expectsEmptyResultSet() |
| .go(); |
| } |
| |
| @Test // DRILL-7050 |
| public void testCorrelatedSubQueryInSelect() throws Exception { |
| String tableName = "dfs.tmp.source"; |
| String query = |
| "select t1.id,\n" + |
| "(select count(t2.id)\n" + |
| "from %1$s t2 where t2.id = t1.id) as c\n" + |
| "from %1$s t1"; |
| try { |
| test("create table %s as (select 1 as id union all select 2 as id)", tableName); |
| |
| testBuilder() |
| .sqlQuery(query, tableName) |
| .unOrdered() |
| .baselineColumns("id", "c") |
| .baselineValues(1, 1L) |
| .baselineValues(2, 1L) |
| .go(); |
| } finally { |
| test("drop table if exists %s", tableName); |
| } |
| } |
| } |