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)