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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-4906) CASE Expression with constant generates class exception
Date Thu, 29 Sep 2016 11:28:21 GMT

    [ https://issues.apache.org/jira/browse/DRILL-4906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15532526#comment-15532526
] 

ASF GitHub Bot commented on DRILL-4906:
---------------------------------------

Github user Serhii-Harnyk commented on a diff in the pull request:

    https://github.com/apache/drill/pull/598#discussion_r81115837
  
    --- Diff: exec/java-exec/src/test/java/org/apache/drill/exec/planner/logical/TestCaseNullableTypes.java
---
    @@ -0,0 +1,107 @@
    +/*
    +* 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.BaseTestQuery;
    +import org.junit.Test;
    +
    +/**
    + * DRILL-4906
    + * Tests for handling nullable types in CASE function
    + */
    +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 {
    --- End diff --
    
    Done


> CASE Expression with constant generates class exception
> -------------------------------------------------------
>
>                 Key: DRILL-4906
>                 URL: https://issues.apache.org/jira/browse/DRILL-4906
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: SQL Parser
>    Affects Versions: 1.6.0, 1.8.0
>            Reporter: Serhii Harnyk
>            Assignee: Serhii Harnyk
>             Fix For: 1.9.0
>
>
> How to reproduce:
> select (case when (true) then 1 end) from (values(1));
> Error
> Error: SYSTEM ERROR: ClassCastException: org.apache.drill.exec.expr.holders.NullableVarCharHolder
cannot be cast to org.apache.drill.exec.expr.holders.VarCharHolder



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