[jira] [Created] (DRILL-7237) IllegalStateException in aggregation function 'single_value' when there is a varchar datatype in the subquery results

["Denys Ordynskiy (JIRA)" <ji...@apache.org>]

Denys Ordynskiy created DRILL-7237:
--------------------------------------

             Summary: IllegalStateException in aggregation function 'single_value' when there is a varchar datatype in the subquery results
                 Key: DRILL-7237
                 URL: https://issues.apache.org/jira/browse/DRILL-7237
             Project: Apache Drill
          Issue Type: Bug
    Affects Versions: 1.15.0, 1.14.0
            Reporter: Denys Ordynskiy
            Assignee: Volodymyr Vysotskyi
         Attachments: drillbit.log

*Description:*
The following issue can be reproduced on the EBF for the [DRILL-7050|https://issues.apache.org/jira/browse/DRILL-7050].

_For the query with > 1 row in subquery results where the data type of these results *is not varchar*:_
{noformat}
SELECT
  e.full_name,
  (
    SELECT
      ine.employee_id
    FROM
      cp.`employee.json` ine
    WHERE
      ine.position_id = e.position_id
  ) as empl_id
FROM
  cp.`employee.json` e
LIMIT 20
{noformat}

_We have the following correct and informative error:_
{noformat}
Query Failed: An Error Occurred
org.apache.drill.common.exceptions.UserRemoteException: FUNCTION ERROR: Input for single_value function has more than one row Fragment 0:0 [Error Id: b770098f-b1c7-4647-9f41-9e986a0e47b7 on maprhost:31010]
{noformat}

_But when in the result set of the subquery we have *a varchar data type*:_
{noformat}
SELECT
  e.full_name,
  (
    SELECT
      ine.first_name
    FROM
      cp.`employee.json` ine
    WHERE
      ine.position_id = e.position_id
  ) as empl_id
FROM
  cp.`employee.json` e
LIMIT 20
{noformat}

*Actual result:*
_Drill throws the following error:_
{noformat}
org.apache.drill.common.exceptions.UserRemoteException: SYSTEM ERROR: IllegalStateException: Workspace variable 'value' in aggregation function 'single_value' is not allowed to have variable length type. Fragment 0:0 Please, refer to logs for more information. [Error Id: 32325ba9-d2b3-4216-acf6-8e80dfe4a56a on maprhost:31010]
{noformat}
Log file is in the attachment "drillbit.log"

*Expected result:*
Drill should return the same informative error to any of a data types in the subquery result set.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)