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https://issues.apache.org/jira/browse/DRILL-4984?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arina Ielchiieva reassigned DRILL-4984:
---------------------------------------
Assignee: Vitalii Diravka
> Limit 0 raises NullPointerException on JDBC storage sources
> -----------------------------------------------------------
>
> Key: DRILL-4984
> URL: https://issues.apache.org/jira/browse/DRILL-4984
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 1.8.0, 1.9.0, 1.10.0, 1.11.0, 1.12.0
> Environment: Latest 1.9 release also 1.8 release version,
> mysql-connector-java-5.1.30, mysql-connector-java-5.1.40
> Reporter: Holger Kiel
> Assignee: Vitalii Diravka
> Priority: Major
> Fix For: 1.15.0
>
>
> NullPointerExceptions occur when a query with 'limit 0' is executed on a jdbc
> storage source (e.g. Mysql):
> {code}
> 0: jdbc:drill:zk=local> select * from mysql.sugarcrm.sales_person limit 0;
> Error: SYSTEM ERROR: NullPointerException
> [Error Id: 6cd676fc-6db9-40b3-81d5-c2db044aeb77 on localhost:31010]
> (org.apache.drill.exec.work.foreman.ForemanException) Unexpected exception
> during fragment initialization: null
> org.apache.drill.exec.work.foreman.Foreman.run():281
> java.util.concurrent.ThreadPoolExecutor.runWorker():1142
> java.util.concurrent.ThreadPoolExecutor$Worker.run():617
> java.lang.Thread.run():745
> Caused By (java.lang.NullPointerException) null
>
> org.apache.drill.exec.planner.sql.handlers.FindHardDistributionScans.visit():55
> org.apache.calcite.rel.core.TableScan.accept():166
> org.apache.calcite.rel.RelShuttleImpl.visitChild():53
> org.apache.calcite.rel.RelShuttleImpl.visitChildren():68
> org.apache.calcite.rel.RelShuttleImpl.visit():126
> org.apache.calcite.rel.AbstractRelNode.accept():256
> org.apache.calcite.rel.RelShuttleImpl.visitChild():53
> org.apache.calcite.rel.RelShuttleImpl.visitChildren():68
> org.apache.calcite.rel.RelShuttleImpl.visit():126
> org.apache.calcite.rel.AbstractRelNode.accept():256
>
> org.apache.drill.exec.planner.sql.handlers.FindHardDistributionScans.canForceSingleMode():45
>
> org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.convertToDrel():262
>
> org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.convertToDrel():290
> org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler.getPlan():168
> org.apache.drill.exec.planner.sql.DrillSqlWorker.getPhysicalPlan():123
> org.apache.drill.exec.planner.sql.DrillSqlWorker.getPlan():97
> org.apache.drill.exec.work.foreman.Foreman.runSQL():1008
> org.apache.drill.exec.work.foreman.Foreman.run():264
> java.util.concurrent.ThreadPoolExecutor.runWorker():1142
> java.util.concurrent.ThreadPoolExecutor$Worker.run():617
> java.lang.Thread.run():745 (state=,code=0)
> 0: jdbc:drill:zk=local> select * from mysql.sugarcrm.sales_person limit 1;
> +-----+-------------+----------------+------------+-------------+
> | id | first_name | last_name | full_name | manager_id |
> +-----+-------------+----------------+------------+-------------+
> | 1 | null | Administrator | admin | 0 |
> +-----+-------------+----------------+------------+-------------+
> 1 row selected (0,235 seconds)
> {code}
> Other datasources are okay:
> {code}
> 0: jdbc:drill:zk=local> SELECT * FROM cp.`employee.json` LIMIT 0;
> +------+-----------+-----------+---------+--------------+------------+-------------+------------+--------------+-----------------+-----------+----------------+-------------+------------+---------+----------------+------------------+-----------------+---------+------------------+
> | fqn | filename | filepath | suffix | employee_id | full_name |
> first_name | last_name | position_id | position_title | store_id |
> department_id | birth_date | hire_date | salary | supervisor_id |
> education_level | marital_status | gender | management_role |
> +------+-----------+-----------+---------+--------------+------------+-------------+------------+--------------+-----------------+-----------+----------------+-------------+------------+---------+----------------+------------------+-----------------+---------+------------------+
> +------+-----------+-----------+---------+--------------+------------+-------------+------------+--------------+-----------------+-----------+----------------+-------------+------------+---------+----------------+------------------+-----------------+---------+------------------+
> No rows selected (0,309 seconds)
> {code}
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