| /* |
| * 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.exec.planner.logical; |
| |
| import org.apache.drill.exec.planner.physical.PlannerSettings; |
| import org.apache.drill.test.BaseTestQuery; |
| import org.apache.drill.categories.SqlTest; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| import java.math.BigDecimal; |
| |
| /** |
| * Tests for handling nullable types in CASE function |
| */ |
| @Category(SqlTest.class) |
| public class TestCaseNullableTypes extends BaseTestQuery { |
| |
| @Test |
| public void testCaseNullableTypesInt() throws Exception { |
| testBuilder() |
| .sqlQuery("select (case when (false) then null else 1 end) res1 from (values(1))") |
| .unOrdered() |
| .baselineColumns("res1") |
| .baselineValues(1) |
| .go(); |
| } |
| |
| @Test |
| public void testCaseNullableTypesVarchar() throws Exception { |
| testBuilder() |
| .sqlQuery("select (res1 = 'qwe') res2 from (select (case when (false) then null else 'qwe' end) res1 from (values(1)))") |
| .unOrdered() |
| .baselineColumns("res2") |
| .baselineValues(true) |
| .go(); |
| } |
| |
| @Test |
| public void testCaseNullableTypesBigint() throws Exception { |
| testBuilder() |
| .sqlQuery("select (case when (false) then null else " + Long.MAX_VALUE + " end) res1 from (values(1))") |
| .unOrdered() |
| .baselineColumns("res1") |
| .baselineValues(Long.MAX_VALUE) |
| .go(); |
| } |
| |
| @Test |
| public void testCaseNullableTypesFloat() throws Exception { |
| testBuilder() |
| .sqlQuery("select (case when (false) then null else cast(0.1 as float) end) res1 from (values(1))") |
| .unOrdered() |
| .baselineColumns("res1") |
| .baselineValues(0.1F) |
| .go(); |
| } |
| |
| @Test |
| public void testCaseNullableTypesDouble() throws Exception { |
| testBuilder() |
| .sqlQuery("select (case when (false) then null else cast(0.1 as double) end) res1 from (values(1))") |
| .unOrdered() |
| .baselineColumns("res1") |
| .baselineValues(0.1) |
| .go(); |
| } |
| |
| @Test |
| public void testCaseNullableTypesBoolean() throws Exception { |
| testBuilder() |
| .sqlQuery("select (case when (false) then null else true end) res1 from (values(1))") |
| .unOrdered() |
| .baselineColumns("res1") |
| .baselineValues(true) |
| .go(); |
| } |
| |
| @Test |
| public void testCaseNullableTypesDate() throws Exception { |
| testBuilder() |
| .sqlQuery("select (res1 = 22/09/2016) res2 from (select (case when (false) then null else 22/09/2016 end) res1 from (values(1)))") |
| .unOrdered() |
| .baselineColumns("res2") |
| .baselineValues(true) |
| .go(); |
| } |
| |
| @Test |
| public void testCaseNullableTypesTimestamp() throws Exception { |
| testBuilder() |
| .sqlQuery("select (res1 = current_timestamp) res2 from (select (case when (false) then null else current_timestamp end) res1 from (values(1)))") |
| .unOrdered() |
| .baselineColumns("res2") |
| .baselineValues(true) |
| .go(); |
| } |
| |
| @Test |
| public void testNestedCaseNullableTypes() throws Exception { |
| testBuilder() |
| .sqlQuery("select (case when (false) then null else (case when (false) then null else cast(0.1 as float) end) end) res1 from (values(1))") |
| .unOrdered() |
| .baselineColumns("res1") |
| .baselineValues(0.1f) |
| .go(); |
| } |
| |
| @Test |
| public void testMultipleCasesNullableTypes() throws Exception { |
| testBuilder() |
| .sqlQuery("select (case when (false) then null else 1 end) res1, (case when (false) then null else cast(0.1 as float) end) res2 from (values(1))") |
| .unOrdered() |
| .baselineColumns("res1", "res2") |
| .baselineValues(1, 0.1f) |
| .go(); |
| } |
| |
| @Test //DRILL-5048 |
| public void testCaseNullableTimestamp() throws Exception { |
| java.time.LocalDateTime date = java.time.LocalDateTime.parse("2016-11-17 14:43:23", java.time.format.DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")); |
| |
| testBuilder() |
| .sqlQuery("SELECT (CASE WHEN (false) THEN null ELSE CAST('2016-11-17 14:43:23' AS TIMESTAMP) END) res FROM (values(1)) foo") |
| .unOrdered() |
| .baselineColumns("res") |
| .baselineValues(date) |
| .go(); |
| } |
| |
| @Test |
| public void testCaseNullableTypesDecimal() throws Exception { |
| try { |
| alterSession(PlannerSettings.ENABLE_DECIMAL_DATA_TYPE_KEY, true); |
| testBuilder() |
| .sqlQuery("select (case when (false) then null else cast(0.1 as decimal(2, 1)) end) res1") |
| .ordered() |
| .baselineColumns("res1") |
| .baselineValues(new BigDecimal("0.1")) |
| .go(); |
| } finally { |
| resetSessionOption(PlannerSettings.ENABLE_DECIMAL_DATA_TYPE_KEY); |
| } |
| } |
| |
| // Coalesce is being transformed to if-else cases |
| @Test |
| public void testCoalesceWithUntypedNullValues() throws Exception { |
| testBuilder() |
| .sqlQuery("select coalesce(coalesce(n_name1, n_name2, n_name), coalesce(n_name3, n_name4), n_name3) res from cp.`tpch/nation.parquet` limit 1") |
| .ordered() |
| .baselineColumns("res") |
| .baselineValues("ALGERIA") |
| .go(); |
| } |
| |
| @Test |
| public void testCoalesceWithUntypedNullValues_2() throws Exception { |
| testBuilder() |
| .sqlQuery("select coalesce(coalesce(n_name1, n_name2), n_name) res from cp.`tpch/nation.parquet` limit 1") |
| .ordered() |
| .baselineColumns("res") |
| .baselineValues("ALGERIA") |
| .go(); |
| } |
| } |