alamb commented on code in PR #16941:
URL: https://github.com/apache/datafusion/pull/16941#discussion_r2240765144
##########
datafusion/physical-plan/src/empty.rs:
##########
@@ -165,23 +169,28 @@ impl ExecutionPlan for EmptyExec {
);
}
}
+ // Build explicit stats: exact zero rows and bytes, with unknown
columns
+ let mut stats = Statistics::default()
+ .with_num_rows(Precision::Exact(0))
+ .with_total_byte_size(Precision::Exact(0));
+
+ // Add unknown column stats for each field in schema
Review Comment:
Technically speaking we could probably also add known statistics values too
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