Daniel Jurcau created DRILL-5110:
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Summary: Query containing datatype conversions fails with vague
error if column contains only null
Key: DRILL-5110
URL: https://issues.apache.org/jira/browse/DRILL-5110
Project: Apache Drill
Issue Type: Bug
Components: Functions - Drill
Affects Versions: 1.8.0
Reporter: Daniel Jurcau
Issuing a query like
SELECT CONVERT_FROM(CONVERT_TO(columnName, 'json'), 'utf8') FROM fails if
columnName is not present in the current dataset being queried, or contains
only nulls.
Error received: org.apache.drill.common.exceptions.UserRemoteException: SYSTEM
ERROR: UnsupportedOperationException: Unable to get holder type for minor type
[LATE] and mode [OPTIONAL] Fragment 0:0
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