jayzhan211 commented on code in PR #12536:
URL: https://github.com/apache/datafusion/pull/12536#discussion_r1769691504
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datafusion/expr-common/src/columnar_value.rs:
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@@ -89,7 +91,7 @@ pub enum ColumnarValue {
/// Array of values
Array(ArrayRef),
/// A single value
- Scalar(ScalarValue),
+ Scalar(Scalar),
Review Comment:
> remove variants of ScalarValue while still accounting for them via
data_type
Our first step is to minimize the variant of types, so we don't need
`ScalarValue::Utf8`, `ScalarValue::LargeUtf8` any more but `Scalar` which has
`ScalarValue::String` + `DataType::Utf8` or `ScalarValue::String` +
`DataType::LargeUtf8`. We determine the actual `physical type` based on arrow's
DataType. `ScalarValue::String` is then something close to `logical type`
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