16935267080

Committed 13 Aug 2025 11:00AM UTC coverage: 24.312% (-63.3%) from 87.658%

Build # 16935267080

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Pull #4226

github

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web-flow

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Merge 81b48c7fb into baa6ea202

Pull Request Pull Request #4226: Support converting TimestampTZ to and from duckdb

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/vortex-array/src/compute/compare.rs

// SPDX-License-Identifier: Apache-2.0
// SPDX-FileCopyrightText: Copyright the Vortex contributors

use core::fmt;
use std::any::Any;
use std::fmt::{Display, Formatter};
use std::sync::LazyLock;

use arcref::ArcRef;
use arrow_buffer::BooleanBuffer;
use arrow_ord::cmp;
use vortex_dtype::{DType, NativePType, Nullability};
use vortex_error::{VortexError, VortexExpect, VortexResult, vortex_bail, vortex_err};
use vortex_scalar::Scalar;

use crate::arrays::ConstantArray;
use crate::arrow::{Datum, from_arrow_array_with_len};
use crate::compute::{ComputeFn, ComputeFnVTable, InvocationArgs, Kernel, Options, Output};
use crate::vtable::VTable;
use crate::{Array, ArrayRef, Canonical, IntoArray};

static COMPARE_FN: LazyLock<ComputeFn> = LazyLock::new(|| {
    let compute = ComputeFn::new("compare".into(), ArcRef::new_ref(&Compare));
    for kernel in inventory::iter::<CompareKernelRef> {
        compute.register_kernel(kernel.0.clone());
    }
    compute
});

/// Compares two arrays and returns a new boolean array with the result of the comparison.
/// Or, returns None if comparison is not supported for these arrays.
pub fn compare(left: &dyn Array, right: &dyn Array, operator: Operator) -> VortexResult<ArrayRef> {
    COMPARE_FN
        .invoke(&InvocationArgs {
            inputs: &[left.into(), right.into()],
            options: &operator,
        })?
        .unwrap_array()
}

#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Hash)]
pub enum Operator {
    /// Equality (`=`)
    Eq,
    /// Inequality (`!=`)
    NotEq,
    /// Greater than (`>`)
    Gt,
    /// Greater than or equal (`>=`)
    Gte,
    /// Less than (`<`)
    Lt,
    /// Less than or equal (`<=`)
    Lte,
}

impl Display for Operator {
    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
        let display = match &self {
            Operator::Eq => "=",
            Operator::NotEq => "!=",
            Operator::Gt => ">",
            Operator::Gte => ">=",
            Operator::Lt => "<",
            Operator::Lte => "<=",
        };
        Display::fmt(display, f)
    }
}

impl Operator {
    pub fn inverse(self) -> Self {
        match self {
            Operator::Eq => Operator::NotEq,
            Operator::NotEq => Operator::Eq,
            Operator::Gt => Operator::Lte,
            Operator::Gte => Operator::Lt,
            Operator::Lt => Operator::Gte,
            Operator::Lte => Operator::Gt,
        }
    }

    /// Change the sides of the operator, where changing lhs and rhs won't change the result of the operation
    pub fn swap(self) -> Self {
        match self {
            Operator::Eq => Operator::Eq,
            Operator::NotEq => Operator::NotEq,
            Operator::Gt => Operator::Lt,
            Operator::Gte => Operator::Lte,
            Operator::Lt => Operator::Gt,
            Operator::Lte => Operator::Gte,
        }
    }
}

pub struct CompareKernelRef(ArcRef<dyn Kernel>);
inventory::collect!(CompareKernelRef);

pub trait CompareKernel: VTable {
    fn compare(
        &self,
        lhs: &Self::Array,
        rhs: &dyn Array,
        operator: Operator,
    ) -> VortexResult<Option<ArrayRef>>;
}

#[derive(Debug)]
pub struct CompareKernelAdapter<V: VTable>(pub V);

impl<V: VTable + CompareKernel> CompareKernelAdapter<V> {
    pub const fn lift(&'static self) -> CompareKernelRef {
        CompareKernelRef(ArcRef::new_ref(self))
    }
}

impl<V: VTable + CompareKernel> Kernel for CompareKernelAdapter<V> {
    fn invoke(&self, args: &InvocationArgs) -> VortexResult<Option<Output>> {
        let inputs = CompareArgs::try_from(args)?;
        let Some(array) = inputs.lhs.as_opt::<V>() else {
            return Ok(None);
        };
        Ok(V::compare(&self.0, array, inputs.rhs, inputs.operator)?.map(|array| array.into()))
    }
}

struct Compare;

impl ComputeFnVTable for Compare {
    fn invoke(
        &self,
        args: &InvocationArgs,
        kernels: &[ArcRef<dyn Kernel>],
    ) -> VortexResult<Output> {
        let CompareArgs { lhs, rhs, operator } = CompareArgs::try_from(args)?;

        let return_dtype = self.return_dtype(args)?;

        if lhs.is_empty() {
            return Ok(Canonical::empty(&return_dtype).into_array().into());
        }

        let left_constant_null = lhs.as_constant().map(|l| l.is_null()).unwrap_or(false);
        let right_constant_null = rhs.as_constant().map(|r| r.is_null()).unwrap_or(false);
        if left_constant_null || right_constant_null {
            return Ok(ConstantArray::new(Scalar::null(return_dtype), lhs.len())
                .into_array()
                .into());
        }

        let right_is_constant = rhs.is_constant();

        // Always try to put constants on the right-hand side so encodings can optimise themselves.
        if lhs.is_constant() && !right_is_constant {
            return Ok(compare(rhs, lhs, operator.swap())?.into());
        }

        // First try lhs op rhs, then invert and try again.
        for kernel in kernels {
            if let Some(output) = kernel.invoke(args)? {
                return Ok(output);
            }
        }
        if let Some(output) = lhs.invoke(&COMPARE_FN, args)? {
            return Ok(output);
        }

        // Try inverting the operator and swapping the arguments
        let inverted_args = InvocationArgs {
            inputs: &[rhs.into(), lhs.into()],
            options: &operator.swap(),
        };
        for kernel in kernels {
            if let Some(output) = kernel.invoke(&inverted_args)? {
                return Ok(output);
            }
        }
        if let Some(output) = rhs.invoke(&COMPARE_FN, &inverted_args)? {
            return Ok(output);
        }

        // Only log missing compare implementation if there's possibly better one than arrow,
        // i.e. lhs isn't arrow or rhs isn't arrow or constant
        if !(lhs.is_arrow() && (rhs.is_arrow() || right_is_constant)) {
            log::debug!(
                "No compare implementation found for LHS {}, RHS {}, and operator {} (or inverse)",
                lhs.encoding_id(),
                rhs.encoding_id(),
                operator,
            );
        }

        // Fallback to arrow on canonical types
        Ok(arrow_compare(lhs, rhs, operator)?.into())
    }

    fn return_dtype(&self, args: &InvocationArgs) -> VortexResult<DType> {
        let CompareArgs { lhs, rhs, .. } = CompareArgs::try_from(args)?;

        if !lhs.dtype().eq_ignore_nullability(rhs.dtype()) {
            vortex_bail!(
                "Cannot compare different DTypes {} and {}",
                lhs.dtype(),
                rhs.dtype()
            );
        }

        // TODO(ngates): no reason why not
        if lhs.dtype().is_struct() {
            vortex_bail!(
                "Compare does not support arrays with Struct DType, got: {} and {}",
                lhs.dtype(),
                rhs.dtype()
            )
        }

        Ok(DType::Bool(
            lhs.dtype().nullability() | rhs.dtype().nullability(),
        ))
    }

    fn return_len(&self, args: &InvocationArgs) -> VortexResult<usize> {
        let CompareArgs { lhs, rhs, .. } = CompareArgs::try_from(args)?;
        if lhs.len() != rhs.len() {
            vortex_bail!(
                "Compare operations only support arrays of the same length, got {} and {}",
                lhs.len(),
                rhs.len()
            );
        }
        Ok(lhs.len())
    }

    fn is_elementwise(&self) -> bool {
        true
    }
}

struct CompareArgs<'a> {
    lhs: &'a dyn Array,
    rhs: &'a dyn Array,
    operator: Operator,
}

impl Options for Operator {
    fn as_any(&self) -> &dyn Any {
        self
    }
}

impl<'a> TryFrom<&InvocationArgs<'a>> for CompareArgs<'a> {
    type Error = VortexError;

    fn try_from(value: &InvocationArgs<'a>) -> Result<Self, Self::Error> {
        if value.inputs.len() != 2 {
            vortex_bail!("Expected 2 inputs, found {}", value.inputs.len());
        }
        let lhs = value.inputs[0]
            .array()
            .ok_or_else(|| vortex_err!("Expected first input to be an array"))?;
        let rhs = value.inputs[1]
            .array()
            .ok_or_else(|| vortex_err!("Expected second input to be an array"))?;
        let operator = *value
            .options
            .as_any()
            .downcast_ref::<Operator>()
            .vortex_expect("Expected options to be an operator");

        Ok(CompareArgs { lhs, rhs, operator })
    }
}

/// Helper function to compare empty values with arrays that have external value length information
/// like `VarBin`.
pub fn compare_lengths_to_empty<P, I>(lengths: I, op: Operator) -> BooleanBuffer
where
    P: NativePType,
    I: Iterator<Item = P>,
{
    // All comparison can be expressed in terms of equality. "" is the absolute min of possible value.
    let cmp_fn = match op {
        Operator::Eq | Operator::Lte => |v| v == P::zero(),
        Operator::NotEq | Operator::Gt => |v| v != P::zero(),
        Operator::Gte => |_| true,
        Operator::Lt => |_| false,
    };

    lengths.map(cmp_fn).collect::<BooleanBuffer>()
}

/// Implementation of `CompareFn` using the Arrow crate.
fn arrow_compare(
    left: &dyn Array,
    right: &dyn Array,
    operator: Operator,
) -> VortexResult<ArrayRef> {
    let nullable = left.dtype().is_nullable() || right.dtype().is_nullable();
    let lhs = Datum::try_new(left)?;
    let rhs = Datum::try_new(right)?;

    let array = match operator {
        Operator::Eq => cmp::eq(&lhs, &rhs)?,
        Operator::NotEq => cmp::neq(&lhs, &rhs)?,
        Operator::Gt => cmp::gt(&lhs, &rhs)?,
        Operator::Gte => cmp::gt_eq(&lhs, &rhs)?,
        Operator::Lt => cmp::lt(&lhs, &rhs)?,
        Operator::Lte => cmp::lt_eq(&lhs, &rhs)?,
    };
    from_arrow_array_with_len(&array, left.len(), nullable)
}

pub fn scalar_cmp(lhs: &Scalar, rhs: &Scalar, operator: Operator) -> Scalar {
    if lhs.is_null() | rhs.is_null() {
        Scalar::null(DType::Bool(Nullability::Nullable))
    } else {
        let b = match operator {
            Operator::Eq => lhs == rhs,
            Operator::NotEq => lhs != rhs,
            Operator::Gt => lhs > rhs,
            Operator::Gte => lhs >= rhs,
            Operator::Lt => lhs < rhs,
            Operator::Lte => lhs <= rhs,
        };

        Scalar::bool(b, lhs.dtype().nullability() | rhs.dtype().nullability())
    }
}

#[cfg(test)]
mod tests {
    use arrow_buffer::BooleanBuffer;
    use rstest::rstest;

    use super::*;
    use crate::ToCanonical;
    use crate::arrays::{BoolArray, ConstantArray, VarBinArray, VarBinViewArray};
    use crate::test_harness::to_int_indices;
    use crate::validity::Validity;

    #[test]
    fn test_bool_basic_comparisons() {
        let arr = BoolArray::new(
            BooleanBuffer::from_iter([true, true, false, true, false]),
            Validity::from_iter([false, true, true, true, true]),
        );

        let matches = compare(arr.as_ref(), arr.as_ref(), Operator::Eq)
            .unwrap()
            .to_bool()
            .unwrap();

        assert_eq!(to_int_indices(matches).unwrap(), [1u64, 2, 3, 4]);

        let matches = compare(arr.as_ref(), arr.as_ref(), Operator::NotEq)
            .unwrap()
            .to_bool()
            .unwrap();
        let empty: [u64; 0] = [];
        assert_eq!(to_int_indices(matches).unwrap(), empty);

        let other = BoolArray::new(
            BooleanBuffer::from_iter([false, false, false, true, true]),
            Validity::from_iter([false, true, true, true, true]),
        );

        let matches = compare(arr.as_ref(), other.as_ref(), Operator::Lte)
            .unwrap()
            .to_bool()
            .unwrap();
        assert_eq!(to_int_indices(matches).unwrap(), [2u64, 3, 4]);

        let matches = compare(arr.as_ref(), other.as_ref(), Operator::Lt)
            .unwrap()
            .to_bool()
            .unwrap();
        assert_eq!(to_int_indices(matches).unwrap(), [4u64]);

        let matches = compare(other.as_ref(), arr.as_ref(), Operator::Gte)
            .unwrap()
            .to_bool()
            .unwrap();
        assert_eq!(to_int_indices(matches).unwrap(), [2u64, 3, 4]);

        let matches = compare(other.as_ref(), arr.as_ref(), Operator::Gt)
            .unwrap()
            .to_bool()
            .unwrap();
        assert_eq!(to_int_indices(matches).unwrap(), [4u64]);
    }

    #[test]
    fn constant_compare() {
        let left = ConstantArray::new(Scalar::from(2u32), 10);
        let right = ConstantArray::new(Scalar::from(10u32), 10);

        let compare = compare(left.as_ref(), right.as_ref(), Operator::Gt).unwrap();
        let res = compare.as_constant().unwrap();
        assert_eq!(res.as_bool().value(), Some(false));
        assert_eq!(compare.len(), 10);

        let compare = arrow_compare(&left.into_array(), &right.into_array(), Operator::Gt).unwrap();
        let res = compare.as_constant().unwrap();
        assert_eq!(res.as_bool().value(), Some(false));
        assert_eq!(compare.len(), 10);
    }

    #[rstest]
    #[case(Operator::Eq, vec![false, false, false, true])]
    #[case(Operator::NotEq, vec![true, true, true, false])]
    #[case(Operator::Gt, vec![true, true, true, false])]
    #[case(Operator::Gte, vec![true, true, true, true])]
    #[case(Operator::Lt, vec![false, false, false, false])]
    #[case(Operator::Lte, vec![false, false, false, true])]
    fn test_cmp_to_empty(#[case] op: Operator, #[case] expected: Vec<bool>) {
        let lengths: Vec<i32> = vec![1, 5, 7, 0];

        let output = compare_lengths_to_empty(lengths.iter().copied(), op);
        assert_eq!(Vec::from_iter(output.iter()), expected);
    }

    #[rstest]
    #[case(VarBinArray::from(vec!["a", "b"]).into_array(), VarBinViewArray::from_iter_str(["a", "b"]).into_array())]
    #[case(VarBinViewArray::from_iter_str(["a", "b"]).into_array(), VarBinArray::from(vec!["a", "b"]).into_array())]
    #[case(VarBinArray::from(vec!["a".as_bytes(), "b".as_bytes()]).into_array(), VarBinViewArray::from_iter_bin(["a".as_bytes(), "b".as_bytes()]).into_array())]
    #[case(VarBinViewArray::from_iter_bin(["a".as_bytes(), "b".as_bytes()]).into_array(), VarBinArray::from(vec!["a".as_bytes(), "b".as_bytes()]).into_array())]
    fn arrow_compare_different_encodings(#[case] left: ArrayRef, #[case] right: ArrayRef) {
        let res = compare(&left, &right, Operator::Eq).unwrap();
        assert_eq!(
            res.to_bool().unwrap().boolean_buffer().count_set_bits(),
            left.len()
        );
    }
}

1	// SPDX-License-Identifier: Apache-2.0
2	// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4	use core::fmt;
5	use std::any::Any;
6	use std::fmt::{Display, Formatter};
7	use std::sync::LazyLock;
8
9	use arcref::ArcRef;
10	use arrow_buffer::BooleanBuffer;
11	use arrow_ord::cmp;
12	use vortex_dtype::{DType, NativePType, Nullability};
13	use vortex_error::{VortexError, VortexExpect, VortexResult, vortex_bail, vortex_err};
14	use vortex_scalar::Scalar;
15
16	use crate::arrays::ConstantArray;
17	use crate::arrow::{Datum, from_arrow_array_with_len};
18	use crate::compute::{ComputeFn, ComputeFnVTable, InvocationArgs, Kernel, Options, Output};
19	use crate::vtable::VTable;
20	use crate::{Array, ArrayRef, Canonical, IntoArray};
21
UNCOV 22	static COMPARE_FN: LazyLock<ComputeFn> = LazyLock::new(\|\| {	×
UNCOV 23	let compute = ComputeFn::new("compare".into(), ArcRef::new_ref(&Compare));	×
UNCOV 24	for kernel in inventory::iter::<CompareKernelRef> {	×
UNCOV 25	compute.register_kernel(kernel.0.clone());	×
UNCOV 26	}	×
UNCOV 27	compute	×
UNCOV 28	});	×
29
30	/// Compares two arrays and returns a new boolean array with the result of the comparison.
31	/// Or, returns None if comparison is not supported for these arrays.
UNCOV 32	pub fn compare(left: &dyn Array, right: &dyn Array, operator: Operator) -> VortexResult<ArrayRef> {	×
UNCOV 33	COMPARE_FN	×
UNCOV 34	.invoke(&InvocationArgs {	×
UNCOV 35	inputs: &[left.into(), right.into()],	×
UNCOV 36	options: &operator,	×
UNCOV 37	})?	×
UNCOV 38	.unwrap_array()	×
UNCOV 39	}	×
40
41	#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Hash)]
42	pub enum Operator {
43	/// Equality (`=`)
44	Eq,
45	/// Inequality (`!=`)
46	NotEq,
47	/// Greater than (`>`)
48	Gt,
49	/// Greater than or equal (`>=`)
50	Gte,
51	/// Less than (`<`)
52	Lt,
53	/// Less than or equal (`<=`)
54	Lte,
55	}
56
57	impl Display for Operator {
58	fn fmt(&self, f: &mut Formatter) -> fmt::Result {	×
59	let display = match &self {	×
60	Operator::Eq => "=",	×
61	Operator::NotEq => "!=",	×
62	Operator::Gt => ">",	×
63	Operator::Gte => ">=",	×
64	Operator::Lt => "<",	×
65	Operator::Lte => "<=",	×
66	};
67	Display::fmt(display, f)	×
68	}	×
69	}
70
71	impl Operator {
72	pub fn inverse(self) -> Self {	×
73	match self {	×
74	Operator::Eq => Operator::NotEq,	×
75	Operator::NotEq => Operator::Eq,	×
76	Operator::Gt => Operator::Lte,	×
77	Operator::Gte => Operator::Lt,	×
78	Operator::Lt => Operator::Gte,	×
79	Operator::Lte => Operator::Gt,	×
80	}
81	}	×
82
83	/// Change the sides of the operator, where changing lhs and rhs won't change the result of the operation
UNCOV 84	pub fn swap(self) -> Self {	×
UNCOV 85	match self {	×
UNCOV 86	Operator::Eq => Operator::Eq,	×
UNCOV 87	Operator::NotEq => Operator::NotEq,	×
UNCOV 88	Operator::Gt => Operator::Lt,	×
UNCOV 89	Operator::Gte => Operator::Lte,	×
UNCOV 90	Operator::Lt => Operator::Gt,	×
UNCOV 91	Operator::Lte => Operator::Gte,	×
92	}
UNCOV 93	}	×
94	}
95
96	pub struct CompareKernelRef(ArcRef<dyn Kernel>);
97	inventory::collect!(CompareKernelRef);
98
99	pub trait CompareKernel: VTable {
100	fn compare(
101	&self,
102	lhs: &Self::Array,
103	rhs: &dyn Array,
104	operator: Operator,
105	) -> VortexResult<Option<ArrayRef>>;
106	}
107
108	#[derive(Debug)]
109	pub struct CompareKernelAdapter<V: VTable>(pub V);
110
111	impl<V: VTable + CompareKernel> CompareKernelAdapter<V> {
112	pub const fn lift(&'static self) -> CompareKernelRef {	×
113	CompareKernelRef(ArcRef::new_ref(self))	×
114	}	×
115	}
116
117	impl<V: VTable + CompareKernel> Kernel for CompareKernelAdapter<V> {
UNCOV 118	fn invoke(&self, args: &InvocationArgs) -> VortexResult<Option<Output>> {	×
UNCOV 119	let inputs = CompareArgs::try_from(args)?;	×
UNCOV 120	let Some(array) = inputs.lhs.as_opt::<V>() else {	×
UNCOV 121	return Ok(None);	×
122	};
UNCOV 123	Ok(V::compare(&self.0, array, inputs.rhs, inputs.operator)?.map(\|array\| array.into()))	×
UNCOV 124	}	×
125	}
126
127	struct Compare;
128
129	impl ComputeFnVTable for Compare {
UNCOV 130	fn invoke(	×
UNCOV 131	&self,	×
UNCOV 132	args: &InvocationArgs,	×
UNCOV 133	kernels: &[ArcRef<dyn Kernel>],	×
UNCOV 134	) -> VortexResult<Output> {	×
UNCOV 135	let CompareArgs { lhs, rhs, operator } = CompareArgs::try_from(args)?;	×
136
UNCOV 137	let return_dtype = self.return_dtype(args)?;	×
138
UNCOV 139	if lhs.is_empty() {	×
UNCOV 140	return Ok(Canonical::empty(&return_dtype).into_array().into());	×
UNCOV 141	}	×
142
UNCOV 143	let left_constant_null = lhs.as_constant().map(\|l\| l.is_null()).unwrap_or(false);	×
UNCOV 144	let right_constant_null = rhs.as_constant().map(\|r\| r.is_null()).unwrap_or(false);	×
UNCOV 145	if left_constant_null \|\| right_constant_null {	×
UNCOV 146	return Ok(ConstantArray::new(Scalar::null(return_dtype), lhs.len())	×
UNCOV 147	.into_array()	×
UNCOV 148	.into());	×
UNCOV 149	}	×
150
UNCOV 151	let right_is_constant = rhs.is_constant();	×
152
153	// Always try to put constants on the right-hand side so encodings can optimise themselves.
UNCOV 154	if lhs.is_constant() && !right_is_constant {	×
UNCOV 155	return Ok(compare(rhs, lhs, operator.swap())?.into());	×
UNCOV 156	}	×
157
158	// First try lhs op rhs, then invert and try again.
UNCOV 159	for kernel in kernels {	×
UNCOV 160	if let Some(output) = kernel.invoke(args)? {	×
UNCOV 161	return Ok(output);	×
UNCOV 162	}	×
163	}
UNCOV 164	if let Some(output) = lhs.invoke(&COMPARE_FN, args)? {	×
165	return Ok(output);	×
UNCOV 166	}	×
167
168	// Try inverting the operator and swapping the arguments
UNCOV 169	let inverted_args = InvocationArgs {	×
UNCOV 170	inputs: &[rhs.into(), lhs.into()],	×
UNCOV 171	options: &operator.swap(),	×
UNCOV 172	};	×
UNCOV 173	for kernel in kernels {	×
UNCOV 174	if let Some(output) = kernel.invoke(&inverted_args)? {	×
UNCOV 175	return Ok(output);	×
UNCOV 176	}	×
177	}
UNCOV 178	if let Some(output) = rhs.invoke(&COMPARE_FN, &inverted_args)? {	×
179	return Ok(output);	×
UNCOV 180	}	×
181
182	// Only log missing compare implementation if there's possibly better one than arrow,
183	// i.e. lhs isn't arrow or rhs isn't arrow or constant
UNCOV 184	if !(lhs.is_arrow() && (rhs.is_arrow() \|\| right_is_constant)) {	×
UNCOV 185	log::debug!(	×
186	"No compare implementation found for LHS {}, RHS {}, and operator {} (or inverse)",	×
187	lhs.encoding_id(),	×
188	rhs.encoding_id(),	×
189	operator,
190	);
UNCOV 191	}	×
192
193	// Fallback to arrow on canonical types
UNCOV 194	Ok(arrow_compare(lhs, rhs, operator)?.into())	×
UNCOV 195	}	×
196
UNCOV 197	fn return_dtype(&self, args: &InvocationArgs) -> VortexResult<DType> {	×
UNCOV 198	let CompareArgs { lhs, rhs, .. } = CompareArgs::try_from(args)?;	×
199
UNCOV 200	if !lhs.dtype().eq_ignore_nullability(rhs.dtype()) {	×
UNCOV 201	vortex_bail!(	×
UNCOV 202	"Cannot compare different DTypes {} and {}",	×
UNCOV 203	lhs.dtype(),	×
UNCOV 204	rhs.dtype()	×
205	);
UNCOV 206	}	×
207
208	// TODO(ngates): no reason why not
UNCOV 209	if lhs.dtype().is_struct() {	×
210	vortex_bail!(	×
211	"Compare does not support arrays with Struct DType, got: {} and {}",	×
212	lhs.dtype(),	×
213	rhs.dtype()	×
214	)
UNCOV 215	}	×
216
UNCOV 217	Ok(DType::Bool(	×
UNCOV 218	lhs.dtype().nullability() \| rhs.dtype().nullability(),	×
UNCOV 219	))	×
UNCOV 220	}	×
221
UNCOV 222	fn return_len(&self, args: &InvocationArgs) -> VortexResult<usize> {	×
UNCOV 223	let CompareArgs { lhs, rhs, .. } = CompareArgs::try_from(args)?;	×
UNCOV 224	if lhs.len() != rhs.len() {	×
225	vortex_bail!(	×
226	"Compare operations only support arrays of the same length, got {} and {}",	×
227	lhs.len(),	×
228	rhs.len()	×
229	);
UNCOV 230	}	×
UNCOV 231	Ok(lhs.len())	×
UNCOV 232	}	×
233
UNCOV 234	fn is_elementwise(&self) -> bool {	×
UNCOV 235	true	×
UNCOV 236	}	×
237	}
238
239	struct CompareArgs<'a> {
240	lhs: &'a dyn Array,
241	rhs: &'a dyn Array,
242	operator: Operator,
243	}
244
245	impl Options for Operator {
UNCOV 246	fn as_any(&self) -> &dyn Any {	×
UNCOV 247	self	×
UNCOV 248	}	×
249	}
250
251	impl<'a> TryFrom<&InvocationArgs<'a>> for CompareArgs<'a> {
252	type Error = VortexError;
253
UNCOV 254	fn try_from(value: &InvocationArgs<'a>) -> Result<Self, Self::Error> {	×
UNCOV 255	if value.inputs.len() != 2 {	×
256	vortex_bail!("Expected 2 inputs, found {}", value.inputs.len());	×
UNCOV 257	}	×
UNCOV 258	let lhs = value.inputs[0]	×
UNCOV 259	.array()	×
UNCOV 260	.ok_or_else(\|\| vortex_err!("Expected first input to be an array"))?;	×
UNCOV 261	let rhs = value.inputs[1]	×
UNCOV 262	.array()	×
UNCOV 263	.ok_or_else(\|\| vortex_err!("Expected second input to be an array"))?;	×
UNCOV 264	let operator = *value	×
UNCOV 265	.options	×
UNCOV 266	.as_any()	×
UNCOV 267	.downcast_ref::<Operator>()	×
UNCOV 268	.vortex_expect("Expected options to be an operator");	×
269
UNCOV 270	Ok(CompareArgs { lhs, rhs, operator })	×
UNCOV 271	}	×
272	}
273
274	/// Helper function to compare empty values with arrays that have external value length information
275	/// like `VarBin`.
UNCOV 276	pub fn compare_lengths_to_empty<P, I>(lengths: I, op: Operator) -> BooleanBuffer	×
UNCOV 277	where	×
UNCOV 278	P: NativePType,	×
UNCOV 279	I: Iterator<Item = P>,	×
280	{
281	// All comparison can be expressed in terms of equality. "" is the absolute min of possible value.
UNCOV 282	let cmp_fn = match op {	×
UNCOV 283	Operator::Eq \| Operator::Lte => \|v\| v == P::zero(),	×
UNCOV 284	Operator::NotEq \| Operator::Gt => \|v\| v != P::zero(),	×
285	Operator::Gte => \|_\| true,
286	Operator::Lt => \|_\| false,
287	};
288
UNCOV 289	lengths.map(cmp_fn).collect::<BooleanBuffer>()	×
UNCOV 290	}	×
291
292	/// Implementation of `CompareFn` using the Arrow crate.
UNCOV 293	fn arrow_compare(	×
UNCOV 294	left: &dyn Array,	×
UNCOV 295	right: &dyn Array,	×
UNCOV 296	operator: Operator,	×
UNCOV 297	) -> VortexResult<ArrayRef> {	×
UNCOV 298	let nullable = left.dtype().is_nullable() \|\| right.dtype().is_nullable();	×
UNCOV 299	let lhs = Datum::try_new(left)?;	×
UNCOV 300	let rhs = Datum::try_new(right)?;	×
301
UNCOV 302	let array = match operator {	×
UNCOV 303	Operator::Eq => cmp::eq(&lhs, &rhs)?,	×
UNCOV 304	Operator::NotEq => cmp::neq(&lhs, &rhs)?,	×
UNCOV 305	Operator::Gt => cmp::gt(&lhs, &rhs)?,	×
UNCOV 306	Operator::Gte => cmp::gt_eq(&lhs, &rhs)?,	×
UNCOV 307	Operator::Lt => cmp::lt(&lhs, &rhs)?,	×
UNCOV 308	Operator::Lte => cmp::lt_eq(&lhs, &rhs)?,	×
309	};
UNCOV 310	from_arrow_array_with_len(&array, left.len(), nullable)	×
UNCOV 311	}	×
312
UNCOV 313	pub fn scalar_cmp(lhs: &Scalar, rhs: &Scalar, operator: Operator) -> Scalar {	×
UNCOV 314	if lhs.is_null() \| rhs.is_null() {	×
315	Scalar::null(DType::Bool(Nullability::Nullable))	×
316	} else {
UNCOV 317	let b = match operator {	×
UNCOV 318	Operator::Eq => lhs == rhs,	×
UNCOV 319	Operator::NotEq => lhs != rhs,	×
UNCOV 320	Operator::Gt => lhs > rhs,	×
UNCOV 321	Operator::Gte => lhs >= rhs,	×
UNCOV 322	Operator::Lt => lhs < rhs,	×
UNCOV 323	Operator::Lte => lhs <= rhs,	×
324	};
325
UNCOV 326	Scalar::bool(b, lhs.dtype().nullability() \| rhs.dtype().nullability())	×
327	}
UNCOV 328	}	×
329
330	#[cfg(test)]
331	mod tests {
332	use arrow_buffer::BooleanBuffer;
333	use rstest::rstest;
334
335	use super::*;
336	use crate::ToCanonical;
337	use crate::arrays::{BoolArray, ConstantArray, VarBinArray, VarBinViewArray};
338	use crate::test_harness::to_int_indices;
339	use crate::validity::Validity;
340
341	#[test]
342	fn test_bool_basic_comparisons() {
343	let arr = BoolArray::new(
344	BooleanBuffer::from_iter([true, true, false, true, false]),
345	Validity::from_iter([false, true, true, true, true]),
346	);
347
348	let matches = compare(arr.as_ref(), arr.as_ref(), Operator::Eq)
349	.unwrap()
350	.to_bool()
351	.unwrap();
352
353	assert_eq!(to_int_indices(matches).unwrap(), [1u64, 2, 3, 4]);
354
355	let matches = compare(arr.as_ref(), arr.as_ref(), Operator::NotEq)
356	.unwrap()
357	.to_bool()
358	.unwrap();
359	let empty: [u64; 0] = [];
360	assert_eq!(to_int_indices(matches).unwrap(), empty);
361
362	let other = BoolArray::new(
363	BooleanBuffer::from_iter([false, false, false, true, true]),
364	Validity::from_iter([false, true, true, true, true]),
365	);
366
367	let matches = compare(arr.as_ref(), other.as_ref(), Operator::Lte)
368	.unwrap()
369	.to_bool()
370	.unwrap();
371	assert_eq!(to_int_indices(matches).unwrap(), [2u64, 3, 4]);
372
373	let matches = compare(arr.as_ref(), other.as_ref(), Operator::Lt)
374	.unwrap()
375	.to_bool()
376	.unwrap();
377	assert_eq!(to_int_indices(matches).unwrap(), [4u64]);
378
379	let matches = compare(other.as_ref(), arr.as_ref(), Operator::Gte)
380	.unwrap()
381	.to_bool()
382	.unwrap();
383	assert_eq!(to_int_indices(matches).unwrap(), [2u64, 3, 4]);
384
385	let matches = compare(other.as_ref(), arr.as_ref(), Operator::Gt)
386	.unwrap()
387	.to_bool()
388	.unwrap();
389	assert_eq!(to_int_indices(matches).unwrap(), [4u64]);
390	}
391
392	#[test]
393	fn constant_compare() {
394	let left = ConstantArray::new(Scalar::from(2u32), 10);
395	let right = ConstantArray::new(Scalar::from(10u32), 10);
396
397	let compare = compare(left.as_ref(), right.as_ref(), Operator::Gt).unwrap();
398	let res = compare.as_constant().unwrap();
399	assert_eq!(res.as_bool().value(), Some(false));
400	assert_eq!(compare.len(), 10);
401
402	let compare = arrow_compare(&left.into_array(), &right.into_array(), Operator::Gt).unwrap();
403	let res = compare.as_constant().unwrap();
404	assert_eq!(res.as_bool().value(), Some(false));
405	assert_eq!(compare.len(), 10);
406	}
407
408	#[rstest]
409	#[case(Operator::Eq, vec![false, false, false, true])]
410	#[case(Operator::NotEq, vec![true, true, true, false])]
411	#[case(Operator::Gt, vec![true, true, true, false])]
412	#[case(Operator::Gte, vec![true, true, true, true])]
413	#[case(Operator::Lt, vec![false, false, false, false])]
414	#[case(Operator::Lte, vec![false, false, false, true])]
415	fn test_cmp_to_empty(#[case] op: Operator, #[case] expected: Vec<bool>) {
416	let lengths: Vec<i32> = vec![1, 5, 7, 0];
417
418	let output = compare_lengths_to_empty(lengths.iter().copied(), op);
419	assert_eq!(Vec::from_iter(output.iter()), expected);
420	}
421
422	#[rstest]
423	#[case(VarBinArray::from(vec!["a", "b"]).into_array(), VarBinViewArray::from_iter_str(["a", "b"]).into_array())]
424	#[case(VarBinViewArray::from_iter_str(["a", "b"]).into_array(), VarBinArray::from(vec!["a", "b"]).into_array())]
425	#[case(VarBinArray::from(vec!["a".as_bytes(), "b".as_bytes()]).into_array(), VarBinViewArray::from_iter_bin(["a".as_bytes(), "b".as_bytes()]).into_array())]
426	#[case(VarBinViewArray::from_iter_bin(["a".as_bytes(), "b".as_bytes()]).into_array(), VarBinArray::from(vec!["a".as_bytes(), "b".as_bytes()]).into_array())]
427	fn arrow_compare_different_encodings(#[case] left: ArrayRef, #[case] right: ArrayRef) {
428	let res = compare(&left, &right, Operator::Eq).unwrap();
429	assert_eq!(
430	res.to_bool().unwrap().boolean_buffer().count_set_bits(),
431	left.len()
432	);
433	}
434	}

vortex-data / vortex / 16935267080

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