notfilippo commented on code in PR #11978:
URL: https://github.com/apache/datafusion/pull/11978#discussion_r1717253809
##########
datafusion/common/src/scalar/mod.rs:
##########
@@ -1714,6 +1631,15 @@ impl ScalarValue {
Some(sv) => sv.data_type(),
};
+ Self::iter_to_array_of_type(scalars.collect(), &data_type)
+ }
+
+ fn iter_to_array_of_type(
Review Comment:
This was introduced because of aggregations that use ScalarValue as state
and so they could lose type information when emitting state.
##########
datafusion/sqllogictest/test_files/string_view.slt:
##########
@@ -261,7 +261,7 @@ explain SELECT column1_utf8 from test where
column1_utf8view = 'Andrew';
----
logical_plan
01)Projection: test.column1_utf8
-02)--Filter: test.column1_utf8view = Utf8View("Andrew")
+02)--Filter: test.column1_utf8view = CAST(Utf8("Andrew") AS Utf8View)
Review Comment:
Casts are not simplified to retain the type information to fix the
`optimize_projection` issue above.
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