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https://issues.apache.org/jira/browse/DRILL-7488?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arina Ielchiieva updated DRILL-7488:
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Summary: Complex queries on INFORMATION_SCHEMA fail when
`planner.slice_target` is small (was: Complex queries on INFORMATION_SCHEMA
fail when `planner.slice_target`is small)
> Complex queries on INFORMATION_SCHEMA fail when `planner.slice_target` is
> small
> -------------------------------------------------------------------------------
>
> Key: DRILL-7488
> URL: https://issues.apache.org/jira/browse/DRILL-7488
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.16.0
> Reporter: Arina Ielchiieva
> Priority: Major
>
> Set small value for slice_target:
> {code:sql}
> alter session set `planner.slice_target`=1;
> {code}
> Run query on INFORMATION_SCHEMA:
> {code:sql}
> select * from information_schema.`tables` where TABLE_NAME='lineitem' order
> by TABLE_NAME;
> {code}
> It will fail with the following exception:
> {noformat}
> java.lang.Exception: org.apache.drill.common.exceptions.UserRemoteException:
> SYSTEM ERROR: UnsupportedOperationException: Schema tree can only be created
> in root fragment. This is a non-root fragment.
> {noformat}
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