gokselk commented on code in PR #13805:
URL: https://github.com/apache/datafusion/pull/13805#discussion_r1889827783
##########
datafusion/physical-expr/src/equivalence/properties.rs:
##########
@@ -3651,4 +3661,38 @@ mod tests {
sort_expr
}
+
+ #[test]
+ fn test_union_constant_value_preservation() -> Result<()> {
+ let schema = Arc::new(Schema::new(vec![
+ Field::new("a", DataType::Int32, true),
+ Field::new("b", DataType::Int32, true),
+ ]));
+
+ let col_a = col("a", &schema)?;
+ let literal_10 = ScalarValue::Int32(Some(10));
+
+ // Create first input with a=10
+ let const_expr1 =
+ ConstExpr::new(Arc::clone(&col_a)).with_value(literal_10.clone());
+ let input1 = EquivalenceProperties::new(Arc::clone(&schema))
+ .with_constants(vec![const_expr1]);
+
+ // Create second input with a=10
+ let const_expr2 =
+ ConstExpr::new(Arc::clone(&col_a)).with_value(literal_10.clone());
+ let input2 = EquivalenceProperties::new(Arc::clone(&schema))
+ .with_constants(vec![const_expr2]);
+
+ // Calculate union properties
+ let union_props = calculate_union(vec![input1, input2], schema)?;
+
+ // Verify column 'a' remains constant with value 10
+ let const_a = &union_props.constants()[0];
+ assert!(const_a.expr().eq(&col_a));
+ assert!(const_a.across_partitions());
+ assert_eq!(const_a.value(), Some(&literal_10));
+
+ Ok(())
+ }
}
Review Comment:
It appears that I broke some ORDER BY queries in my recent commits. I will
investigate this further.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org
For additional commands, e-mail: github-h...@datafusion.apache.org
