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vortex-data / vortex / 16842450156

08 Aug 2025 11:22PM UTC coverage: 86.303% (+0.07%) from 86.234%
16842450156

Pull #4177

github

web-flow
Merge d774e31ff into de5f71d7b
Pull Request #4177: (WIP) feat: ArrayOperations infallible

619 of 689 new or added lines in 105 files covered. (89.84%)

13 existing lines in 8 files now uncovered.

53559 of 62059 relevant lines covered (86.3%)

542885.51 hits per line

Source File
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61.29
/vortex-array/src/arrow/datum.rs
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//  SPDX-License-Identifier: Apache-2.0
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//  SPDX-FileCopyrightText: Copyright the Vortex contributors
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use arrow_array::{Array as ArrowArray, ArrayRef as ArrowArrayRef, Datum as ArrowDatum};
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use arrow_schema::DataType;
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use vortex_error::{VortexResult, vortex_panic};
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use crate::arrays::ConstantArray;
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use crate::arrow::{FromArrowArray, IntoArrowArray};
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use crate::{Array, ArrayRef, IntoArray};
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/// A wrapper around a generic Arrow array that can be used as a Datum in Arrow compute.
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#[derive(Debug)]
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pub struct Datum {
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    array: ArrowArrayRef,
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    is_scalar: bool,
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}
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impl Datum {
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    /// Create a new [`Datum`] from an [`ArrayRef`], which can then be passed to Arrow compute.
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    pub fn try_new(array: &dyn Array) -> VortexResult<Self> {
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        if array.is_constant() {
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            Ok(Self {
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                array: array.slice(0, 1).into_arrow_preferred()?,
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                is_scalar: true,
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            })
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        } else {
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            Ok(Self {
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                array: array.to_array().into_arrow_preferred()?,
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                is_scalar: false,
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            })
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        }
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    }
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    pub fn with_target_datatype(
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        array: &dyn Array,
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        target_datatype: &DataType,
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    ) -> VortexResult<Self> {
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        if array.is_constant() {
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            Ok(Self {
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                array: array.slice(0, 1).into_arrow(target_datatype)?,
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                is_scalar: true,
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            })
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        } else {
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            Ok(Self {
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                array: array.to_array().into_arrow(target_datatype)?,
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                is_scalar: false,
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            })
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        }
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    }
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}
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impl ArrowDatum for Datum {
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    fn get(&self) -> (&dyn ArrowArray, bool) {
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        (&self.array, self.is_scalar)
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    }
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}
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/// Convert an Arrow array to an Array with a specific length.
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/// This is useful for compute functions that delegate to Arrow using [Datum],
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/// which will return a scalar (length 1 Arrow array) if the input array is constant.
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///
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/// Panics if the length of the array is not 1 and also not equal to the expected length.
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pub fn from_arrow_array_with_len<A>(array: A, len: usize, nullable: bool) -> VortexResult<ArrayRef>
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where
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    ArrayRef: FromArrowArray<A>,
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{
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    let array = ArrayRef::from_arrow(array, nullable);
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    if array.len() == len {
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        return Ok(array);
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    }
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    if array.len() != 1 {
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        vortex_panic!(
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            "Array length mismatch, expected {} got {} for encoding {}",
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            len,
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            array.len(),
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            array.encoding_id()
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        );
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    }
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    Ok(ConstantArray::new(array.scalar_at(0)?, len).into_array())
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}
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