alamb commented on code in PR #3547:
URL: https://github.com/apache/arrow-datafusion/pull/3547#discussion_r982826941
##########
datafusion/proto/proto/datafusion.proto:
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@@ -714,6 +714,9 @@ message Union{
}
message ScalarListValue{
+ // encode null explicitly to distinguish a list with a null value
+ // from a list with no values)
+ bool is_null = 3;
Review Comment:
I hope to remove this when I remove `PrimitiveScalarType` and use
`ArrowType` instead
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