alamb commented on a change in pull request #8463:
URL: https://github.com/apache/arrow/pull/8463#discussion_r504827840
##########
File path: rust/datafusion/tests/sql.rs
##########
@@ -1238,3 +1244,59 @@ async fn query_count_distinct() -> Result<()> {
assert_eq!(expected, actual);
Ok(())
}
+
Review comment:
This test demonstrates `DictionaryArray`s being used in DataFusion
##########
File path: rust/datafusion/src/physical_plan/expressions.rs
##########
@@ -1161,16 +1197,13 @@ fn order_coercion(lhs_type: &DataType, rhs_type:
&DataType) -> Option<DataType>
return Some(lhs_type.clone());
}
- match numerical_coercion(lhs_type, rhs_type) {
- None => {
- // strings are naturally ordered, and thus ordering can be applied
to them.
- string_coercion(lhs_type, rhs_type)
- }
- t => t,
- }
+ numerical_coercion(lhs_type, rhs_type)
Review comment:
this is just a refactor, it is not meant to change the semantics
##########
File path: rust/datafusion/src/physical_plan/expressions.rs
##########
@@ -1773,11 +1809,13 @@ mod tests {
// runs an end-to-end test of physical type coercion:
// 1. construct a record batch with two columns of type A and B
+ // (*_ARRAY is the Rust Arrow array type, and *_TYPE is the DataType of
the elements)
// 2. construct a physical expression of A OP B
// 3. evaluate the expression
// 4. verify that the resulting expression is of type C
+ // 5. verify that the results of evaluation are $VEC
macro_rules! test_coercion {
- ($A_ARRAY:ident, $A_TYPE:expr, $A_VEC:expr, $B_ARRAY:ident,
$B_TYPE:expr, $B_VEC:expr, $OP:expr, $TYPEARRAY:ident, $TYPE:expr, $VEC:expr)
=> {{
Review comment:
I updated the parameter names here to make this macro more consistent
with its documentation
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