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Support Date32/Date64 in unwrap_cast optimization #21665

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Support Date32/Date64 in unwrap_cast optimization #21665

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df0953c
Support Date32/Date64 in unwrap_cast optimization
Dandandan Apr 16, 2026
f003e36
Merge branch 'main' into unwrap-cast-date-types
Dandandan Apr 16, 2026
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28 changes: 24 additions & 4 deletions datafusion/expr-common/src/casts.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,11 @@ pub fn is_supported_type(data_type: &DataType) -> bool {
|| is_supported_binary_type(data_type)
}

/// Returns true if unwrap_cast_in_comparison support this numeric type
fn is_date_type(data_type: &DataType) -> bool {
matches!(data_type, DataType::Date32 | DataType::Date64)
}

/// Returns true if unwrap_cast_in_comparison supports this numeric type
fn is_supported_numeric_type(data_type: &DataType) -> bool {
matches!(
data_type,
Expand All @@ -70,6 +74,8 @@ fn is_supported_numeric_type(data_type: &DataType) -> bool {
| DataType::Int16
| DataType::Int32
| DataType::Int64
| DataType::Date32
| DataType::Date64
| DataType::Decimal32(_, _)
| DataType::Decimal64(_, _)
| DataType::Decimal128(_, _)
Expand Down Expand Up @@ -107,6 +113,14 @@ fn try_cast_numeric_literal(
return None;
}

// Date↔Timestamp casts are lossy (drop time-of-day or add midnight),
// so unwrapping would change comparison semantics.
if (is_date_type(&lit_data_type) && target_type.is_temporal())
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@martin-g martin-g Apr 16, 2026

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The comment is about Data<->Timestamp casts but this includes other temporal types like Duration and Interval. Maybe the comment should be extended.

But this also would prevent casting from Date32 to Date64. I think this might be desirable by someone.

|| (is_date_type(target_type) && lit_data_type.is_temporal())
{
return None;
}

let mul = match target_type {
DataType::UInt8
| DataType::UInt16
Expand All @@ -115,7 +129,9 @@ fn try_cast_numeric_literal(
| DataType::Int8
| DataType::Int16
| DataType::Int32
| DataType::Int64 => 1_i128,
| DataType::Int64
| DataType::Date32
| DataType::Date64 => 1_i128,
DataType::Timestamp(_, _) => 1_i128,
DataType::Decimal32(_, scale) => 10_i128.pow(*scale as u32),
DataType::Decimal64(_, scale) => 10_i128.pow(*scale as u32),
Expand All @@ -129,8 +145,8 @@ fn try_cast_numeric_literal(
DataType::UInt64 => (u64::MIN as i128, u64::MAX as i128),
DataType::Int8 => (i8::MIN as i128, i8::MAX as i128),
DataType::Int16 => (i16::MIN as i128, i16::MAX as i128),
DataType::Int32 => (i32::MIN as i128, i32::MAX as i128),
DataType::Int64 => (i64::MIN as i128, i64::MAX as i128),
DataType::Int32 | DataType::Date32 => (i32::MIN as i128, i32::MAX as i128),
DataType::Int64 | DataType::Date64 => (i64::MIN as i128, i64::MAX as i128),
DataType::Timestamp(_, _) => (i64::MIN as i128, i64::MAX as i128),
DataType::Decimal32(precision, _) => (
// Different precision for decimal32 can store different range of value.
Expand Down Expand Up @@ -164,6 +180,8 @@ fn try_cast_numeric_literal(
ScalarValue::UInt16(Some(v)) => (*v as i128).checked_mul(mul),
ScalarValue::UInt32(Some(v)) => (*v as i128).checked_mul(mul),
ScalarValue::UInt64(Some(v)) => (*v as i128).checked_mul(mul),
ScalarValue::Date32(Some(v)) => (*v as i128).checked_mul(mul),
ScalarValue::Date64(Some(v)) => (*v as i128).checked_mul(mul),
ScalarValue::TimestampSecond(Some(v), _) => (*v as i128).checked_mul(mul),
ScalarValue::TimestampMillisecond(Some(v), _) => (*v as i128).checked_mul(mul),
ScalarValue::TimestampMicrosecond(Some(v), _) => (*v as i128).checked_mul(mul),
Expand Down Expand Up @@ -241,6 +259,8 @@ fn try_cast_numeric_literal(
DataType::Int16 => ScalarValue::Int16(Some(value as i16)),
DataType::Int32 => ScalarValue::Int32(Some(value as i32)),
DataType::Int64 => ScalarValue::Int64(Some(value as i64)),
DataType::Date32 => ScalarValue::Date32(Some(value as i32)),
DataType::Date64 => ScalarValue::Date64(Some(value as i64)),
DataType::UInt8 => ScalarValue::UInt8(Some(value as u8)),
DataType::UInt16 => ScalarValue::UInt16(Some(value as u16)),
DataType::UInt32 => ScalarValue::UInt32(Some(value as u32)),
Expand Down
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