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https://issues.apache.org/jira/browse/DRILL-5048?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Serhii Harnyk updated DRILL-5048:
---------------------------------
    Summary: Fix type mismatch error in case statement with null timestamp  
(was: AssertionError when case statement is used with timestamp and null)

> Fix type mismatch error in case statement with null timestamp
> -------------------------------------------------------------
>
>                 Key: DRILL-5048
>                 URL: https://issues.apache.org/jira/browse/DRILL-5048
>             Project: Apache Drill
>          Issue Type: Bug
>    Affects Versions: 1.9.0
>            Reporter: Serhii Harnyk
>            Assignee: Serhii Harnyk
>             Fix For: 1.10.0
>
>
> AssertionError when we use case with timestamp and null:
> {noformat}
> 0: jdbc:drill:schema=dfs.tmp> SELECT res, CASE res WHEN true THEN 
> CAST('1990-10-10 22:40:50' AS TIMESTAMP) ELSE null END
> . . . . . . . . . . . . . . > FROM
> . . . . . . . . . . . . . . > (
> . . . . . . . . . . . . . . >     SELECT
> . . . . . . . . . . . . . . >     (CASE WHEN (false) THEN null ELSE 
> CAST('1990-10-10 22:40:50' AS TIMESTAMP) END) res
> . . . . . . . . . . . . . . >     FROM (values(1)) foo
> . . . . . . . . . . . . . . > ) foobar;
> Error: SYSTEM ERROR: AssertionError: Type mismatch:
> rowtype of new rel:
> RecordType(TIMESTAMP(0) NOT NULL res, TIMESTAMP(0) EXPR$1) NOT NULL
> rowtype of set:
> RecordType(TIMESTAMP(0) res, TIMESTAMP(0) EXPR$1) NOT NULL
> [Error Id: b56e0a4d-2f9e-4afd-8c60-5bc2f9d31f8f on centos-01.qa.lab:31010] 
> (state=,code=0)
> {noformat}
> Stack trace from drillbit.log
> {noformat}
> Caused by: java.lang.AssertionError: Type mismatch:
> rowtype of new rel:
> RecordType(TIMESTAMP(0) NOT NULL res, TIMESTAMP(0) EXPR$1) NOT NULL
> rowtype of set:
> RecordType(TIMESTAMP(0) res, TIMESTAMP(0) EXPR$1) NOT NULL
>         at org.apache.calcite.plan.RelOptUtil.equal(RelOptUtil.java:1696) 
> ~[calcite-core-1.4.0-drill-r18.jar:1.4.0-drill-r18]
>         at org.apache.calcite.plan.volcano.RelSubset.add(RelSubset.java:295) 
> ~[calcite-core-1.4.0-drill-r18.jar:1.4.0-drill-r18]
>         at org.apache.calcite.plan.volcano.RelSet.add(RelSet.java:147) 
> ~[calcite-core-1.4.0-drill-r18.jar:1.4.0-drill-r18]
>         at 
> org.apache.calcite.plan.volcano.VolcanoPlanner.addRelToSet(VolcanoPlanner.java:1818)
>  ~[calcite-core-1.4.0-drill-r18.jar:1.4.0-drill-r18]
>         at 
> org.apache.calcite.plan.volcano.VolcanoPlanner.registerImpl(VolcanoPlanner.java:1760)
>  ~[calcite-core-1.4.0-drill-r18.jar:1.4.0-drill-r18]
>         at 
> org.apache.calcite.plan.volcano.VolcanoPlanner.register(VolcanoPlanner.java:1017)
>  ~[calcite-core-1.4.0-drill-r18.jar:1.4.0-drill-r18]
>         at 
> org.apache.calcite.plan.volcano.VolcanoPlanner.ensureRegistered(VolcanoPlanner.java:1037)
>  ~[calcite-core-1.4.0-drill-r18.jar:1.4.0-drill-r18]
>         at 
> org.apache.calcite.plan.volcano.VolcanoPlanner.ensureRegistered(VolcanoPlanner.java:1940)
>  ~[calcite-core-1.4.0-drill-r18.jar:1.4.0-drill-r18]
>         at 
> org.apache.calcite.plan.volcano.VolcanoRuleCall.transformTo(VolcanoRuleCall.java:138)
>  ~[calcite-core-1.4.0-drill-r18.jar:1.4.0-drill-r18]
>         ... 16 common frames omitted
> {noformat}



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