Bohdan Kazydub created DRILL-6810:
-------------------------------------
Summary: Disable NULL_IF_NULL NullHandling for functions with
ComplexWriter
Key: DRILL-6810
URL: https://issues.apache.org/jira/browse/DRILL-6810
Project: Apache Drill
Issue Type: Bug
Reporter: Bohdan Kazydub
Assignee: Bohdan Kazydub
Currently NullHandling.NULL_IF_NULL is allowed for UDFs with @Output of type
org.apache.drill.exec.vector.complex.writer.BaseWriter.ComplexWriter but no
null handling is performed for the kind of functions which leads to confusion.
The problem is ComplexWriter holds list/map values and Drill does not yet
support NULL values for the types (there is an issue to allow null maps/lists
in [DRILL-4824|https://issues.apache.org/jira/browse/DRILL-4824]).
For such functions support for NULL_IF_NULL will be disabled, as it is done for
aggregate functions, and NullHandling.INTERNAL should be used instead.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
