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

Commit Message

Merge 81b48c7fb into baa6ea202

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

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36.56

/vortex-array/src/arrays/bool/array.rs

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

use arrow_array::BooleanArray;
use arrow_buffer::{BooleanBuffer, BooleanBufferBuilder, MutableBuffer};
use vortex_dtype::DType;
use vortex_error::{VortexResult, vortex_panic};

use crate::Canonical;
use crate::arrays::{BoolVTable, bool};
use crate::builders::ArrayBuilder;
use crate::stats::{ArrayStats, StatsSetRef};
use crate::validity::Validity;
use crate::vtable::{ArrayVTable, CanonicalVTable, ValidityHelper};

/// A boolean array that stores true/false values in a compact bit-packed format.
///
/// This mirrors the Apache Arrow Boolean array encoding, where each boolean value
/// is stored as a single bit rather than a full byte.
///
/// The data layout uses:
/// - A bit-packed buffer where each bit represents one boolean value (0 = false, 1 = true)
/// - An optional validity child array, which must be of type `Bool(NonNullable)`, where true values
///   indicate valid and false indicates null. if the i-th value is null in the validity child,
///   the i-th packed bit in the buffer may be 0 or 1, i.e. it is undefined.
/// - Bit-level slicing is supported with minimal overhead
///
/// # Examples
///
/// ```
/// use vortex_array::arrays::BoolArray;
/// use vortex_array::IntoArray;
///
/// // Create from iterator using FromIterator impl
/// let array: BoolArray = [true, false, true, false].into_iter().collect();
///
/// // Slice the array
/// let sliced = array.slice(1, 3).unwrap();
/// assert_eq!(sliced.len(), 2);
///
/// // Access individual values
/// let value = array.scalar_at(0).unwrap();
/// assert_eq!(value, true.into());
/// ```
#[derive(Clone, Debug)]
pub struct BoolArray {
    dtype: DType,
    buffer: BooleanBuffer,
    pub(crate) validity: Validity,
    pub(crate) stats_set: ArrayStats,
}

impl BoolArray {
    /// Create a new [`BoolArray`] from a set of indices, a length and a [`Validity`].
    /// All indices must be less than the length.
    pub fn from_indices<I: IntoIterator<Item = usize>>(
        length: usize,
        indices: I,
        validity: Validity,
    ) -> Self {
        let mut buffer = MutableBuffer::new_null(length);
        let buffer_slice = buffer.as_slice_mut();
        indices
            .into_iter()
            .for_each(|idx| arrow_buffer::bit_util::set_bit(buffer_slice, idx));
        Self::new(
            BooleanBufferBuilder::new_from_buffer(buffer, length).finish(),
            validity,
        )
    }

    /// Creates a new [`BoolArray`] from a [`BooleanBuffer`] and [`Validity`], without checking
    /// any invariants.
    pub fn new(buffer: BooleanBuffer, validity: Validity) -> Self {
        if let Some(len) = validity.maybe_len()
            && buffer.len() != len
        {
            vortex_panic!(
                "Buffer and validity length mismatch: buffer={}, validity={}",
                buffer.len(),
                len
            );
        }

        // Shrink the buffer to remove any whole bytes.
        let buffer = buffer.shrink_offset();
        Self {
            dtype: DType::Bool(validity.nullability()),
            buffer,
            validity,
            stats_set: ArrayStats::default(),
        }
    }

    /// Returns the underlying [`BooleanBuffer`] of the array.
    pub fn boolean_buffer(&self) -> &BooleanBuffer {
        assert!(
            self.buffer.offset() < 8,
            "Offset must be <8, did we forget to call shrink_offset? Found {}",
            self.buffer.offset()
        );
        &self.buffer
    }

    /// Get a mutable version of this array.
    ///
    /// If the caller holds the only reference to the underlying buffer the underlying buffer is returned
    /// otherwise a copy is created.
    ///
    /// The second value of the tuple is a bit_offset of first value in first byte of the returned builder
    pub fn into_boolean_builder(self) -> (BooleanBufferBuilder, usize) {
        let offset = self.buffer.offset();
        let len = self.buffer.len();
        let arrow_buffer = self.buffer.into_inner();
        let mutable_buf = if arrow_buffer.ptr_offset() == 0 {
            arrow_buffer.into_mutable().unwrap_or_else(|b| {
                let mut buf = MutableBuffer::with_capacity(b.len());
                buf.extend_from_slice(b.as_slice());
                buf
            })
        } else {
            let mut buf = MutableBuffer::with_capacity(arrow_buffer.len());
            buf.extend_from_slice(arrow_buffer.as_slice());
            buf
        };

        (
            BooleanBufferBuilder::new_from_buffer(mutable_buf, offset + len),
            offset,
        )
    }
}

impl From<BooleanBuffer> for BoolArray {
    fn from(value: BooleanBuffer) -> Self {
        Self::new(value, Validity::NonNullable)
    }
}

impl FromIterator<bool> for BoolArray {
    fn from_iter<T: IntoIterator<Item = bool>>(iter: T) -> Self {
        Self::new(BooleanBuffer::from_iter(iter), Validity::NonNullable)
    }
}

impl FromIterator<Option<bool>> for BoolArray {
    fn from_iter<I: IntoIterator<Item = Option<bool>>>(iter: I) -> Self {
        let (buffer, nulls) = BooleanArray::from_iter(iter).into_parts();

        Self::new(
            buffer,
            nulls.map(Validity::from).unwrap_or(Validity::AllValid),
        )
    }
}

impl ValidityHelper for BoolArray {
    fn validity(&self) -> &Validity {
        &self.validity
    }
}

impl ArrayVTable<BoolVTable> for BoolVTable {
    fn len(array: &BoolArray) -> usize {
        array.buffer.len()
    }

    fn dtype(array: &BoolArray) -> &DType {
        &array.dtype
    }

    fn stats(array: &BoolArray) -> StatsSetRef<'_> {
        array.stats_set.to_ref(array.as_ref())
    }
}

impl CanonicalVTable<BoolVTable> for BoolVTable {
    fn canonicalize(array: &BoolArray) -> VortexResult<Canonical> {
        Ok(Canonical::Bool(array.clone()))
    }

    fn append_to_builder(array: &BoolArray, builder: &mut dyn ArrayBuilder) -> VortexResult<()> {
        builder.extend_from_array(array.as_ref())
    }
}

pub trait BooleanBufferExt {
    /// Slice any full bytes from the buffer, leaving the offset < 8.
    fn shrink_offset(self) -> Self;
}

impl BooleanBufferExt for BooleanBuffer {
    fn shrink_offset(self) -> Self {
        let byte_offset = self.offset() / 8;
        let bit_offset = self.offset() % 8;
        let len = self.len();
        let buffer = self
            .into_inner()
            .slice_with_length(byte_offset, (len + bit_offset).div_ceil(8));
        BooleanBuffer::new(buffer, bit_offset, len)
    }
}

#[cfg(test)]
mod tests {
    use arrow_buffer::{BooleanBuffer, BooleanBufferBuilder};
    use vortex_buffer::buffer;

    use crate::arrays::{BoolArray, PrimitiveArray};
    use crate::patches::Patches;
    use crate::validity::Validity;
    use crate::vtable::ValidityHelper;
    use crate::{Array, IntoArray, ToCanonical};

    #[test]
    fn bool_array() {
        let arr = BoolArray::from_iter([true, false, true]);
        let scalar = bool::try_from(&arr.scalar_at(0).unwrap()).unwrap();
        assert!(scalar);
    }

    #[test]
    fn test_all_some_iter() {
        let arr = BoolArray::from_iter([Some(true), Some(false)]);

        assert!(matches!(arr.validity(), Validity::AllValid));

        let scalar = bool::try_from(&arr.scalar_at(0).unwrap()).unwrap();
        assert!(scalar);
        let scalar = bool::try_from(&arr.scalar_at(1).unwrap()).unwrap();
        assert!(!scalar);
    }

    #[test]
    fn test_bool_from_iter() {
        let arr = BoolArray::from_iter([Some(true), Some(true), None, Some(false), None]);

        let scalar = bool::try_from(&arr.scalar_at(0).unwrap()).unwrap();
        assert!(scalar);

        let scalar = bool::try_from(&arr.scalar_at(1).unwrap()).unwrap();
        assert!(scalar);

        let scalar = arr.scalar_at(2).unwrap();
        assert!(scalar.is_null());

        let scalar = bool::try_from(&arr.scalar_at(3).unwrap()).unwrap();
        assert!(!scalar);

        let scalar = arr.scalar_at(4).unwrap();
        assert!(scalar.is_null());
    }

    #[test]
    fn patch_sliced_bools() {
        let arr = {
            let mut builder = BooleanBufferBuilder::new(12);
            builder.append(false);
            builder.append_n(11, true);
            BoolArray::from(builder.finish())
        };
        let sliced = arr.slice(4, 12).unwrap();
        let sliced_len = sliced.len();
        let (values, offset) = sliced.to_bool().unwrap().into_boolean_builder();
        assert_eq!(offset, 4);
        assert_eq!(values.as_slice(), &[254, 15]);

        // patch the underlying array
        let patches = Patches::new(
            arr.len(),
            0,
            buffer![4u32].into_array(), // This creates a non-nullable array
            BoolArray::from(BooleanBuffer::new_unset(1)).into_array(),
        );
        let arr = arr.patch(&patches).unwrap();
        let arr_len = arr.len();
        let (values, offset) = arr.to_bool().unwrap().into_boolean_builder();
        assert_eq!(offset, 0);
        assert_eq!(values.len(), arr_len + offset);
        assert_eq!(values.as_slice(), &[238, 15]);

        // the slice should be unchanged
        let (values, offset) = sliced.to_bool().unwrap().into_boolean_builder();
        assert_eq!(offset, 4);
        assert_eq!(values.len(), sliced_len + offset);
        assert_eq!(values.as_slice(), &[254, 15]); // unchanged
    }

    #[test]
    fn slice_array_in_middle() {
        let arr = BoolArray::from(BooleanBuffer::new_set(16));
        let sliced = arr.slice(4, 12).unwrap();
        let sliced_len = sliced.len();
        let (values, offset) = sliced.to_bool().unwrap().into_boolean_builder();
        assert_eq!(offset, 4);
        assert_eq!(values.len(), sliced_len + offset);
        assert_eq!(values.as_slice(), &[255, 15]);
    }

    #[test]
    #[should_panic]
    fn patch_bools_owned() {
        let buffer = buffer![255u8; 2];
        let buf = BooleanBuffer::new(buffer.into_arrow_buffer(), 0, 15);
        let arr = BoolArray::new(buf, Validity::NonNullable);
        let buf_ptr = arr.boolean_buffer().sliced().as_ptr();

        let patches = Patches::new(
            arr.len(),
            0,
            PrimitiveArray::new(buffer![0u32], Validity::AllValid).into_array(),
            BoolArray::from(BooleanBuffer::new_unset(1)).into_array(),
        );
        let arr = arr.patch(&patches).unwrap();
        assert_eq!(arr.boolean_buffer().sliced().as_ptr(), buf_ptr);

        let (values, _byte_bit_offset) = arr.to_bool().unwrap().into_boolean_builder();
        assert_eq!(values.as_slice(), &[254, 127]);
    }
}

1	// SPDX-License-Identifier: Apache-2.0
2	// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4	use arrow_array::BooleanArray;
5	use arrow_buffer::{BooleanBuffer, BooleanBufferBuilder, MutableBuffer};
6	use vortex_dtype::DType;
7	use vortex_error::{VortexResult, vortex_panic};
8
9	use crate::Canonical;
10	use crate::arrays::{BoolVTable, bool};
11	use crate::builders::ArrayBuilder;
12	use crate::stats::{ArrayStats, StatsSetRef};
13	use crate::validity::Validity;
14	use crate::vtable::{ArrayVTable, CanonicalVTable, ValidityHelper};
15
16	/// A boolean array that stores true/false values in a compact bit-packed format.
17	///
18	/// This mirrors the Apache Arrow Boolean array encoding, where each boolean value
19	/// is stored as a single bit rather than a full byte.
20	///
21	/// The data layout uses:
22	/// - A bit-packed buffer where each bit represents one boolean value (0 = false, 1 = true)
23	/// - An optional validity child array, which must be of type `Bool(NonNullable)`, where true values
24	/// indicate valid and false indicates null. if the i-th value is null in the validity child,
25	/// the i-th packed bit in the buffer may be 0 or 1, i.e. it is undefined.
26	/// - Bit-level slicing is supported with minimal overhead
27	///
28	/// # Examples
29	///
30	/// ```
31	/// use vortex_array::arrays::BoolArray;
32	/// use vortex_array::IntoArray;
33	///
34	/// // Create from iterator using FromIterator impl
35	/// let array: BoolArray = [true, false, true, false].into_iter().collect();
36	///
37	/// // Slice the array
38	/// let sliced = array.slice(1, 3).unwrap();
39	/// assert_eq!(sliced.len(), 2);
40	///
41	/// // Access individual values
42	/// let value = array.scalar_at(0).unwrap();
43	/// assert_eq!(value, true.into());
44	/// ```
45	#[derive(Clone, Debug)]
46	pub struct BoolArray {
47	dtype: DType,
48	buffer: BooleanBuffer,
49	pub(crate) validity: Validity,
50	pub(crate) stats_set: ArrayStats,
51	}
52
53	impl BoolArray {
54	/// Create a new [`BoolArray`] from a set of indices, a length and a [`Validity`].
55	/// All indices must be less than the length.
UNCOV 56	pub fn from_indices<I: IntoIterator<Item = usize>>(	×
UNCOV 57	length: usize,	×
UNCOV 58	indices: I,	×
UNCOV 59	validity: Validity,	×
UNCOV 60	) -> Self {	×
UNCOV 61	let mut buffer = MutableBuffer::new_null(length);	×
UNCOV 62	let buffer_slice = buffer.as_slice_mut();	×
UNCOV 63	indices	×
UNCOV 64	.into_iter()	×
UNCOV 65	.for_each(\|idx\| arrow_buffer::bit_util::set_bit(buffer_slice, idx));	×
UNCOV 66	Self::new(	×
UNCOV 67	BooleanBufferBuilder::new_from_buffer(buffer, length).finish(),	×
UNCOV 68	validity,	×
69	)
UNCOV 70	}	×
71
72	/// Creates a new [`BoolArray`] from a [`BooleanBuffer`] and [`Validity`], without checking
73	/// any invariants.
74	pub fn new(buffer: BooleanBuffer, validity: Validity) -> Self {	8✔
75	if let Some(len) = validity.maybe_len()	8✔
UNCOV 76	&& buffer.len() != len	×
77	{
78	vortex_panic!(	×
79	"Buffer and validity length mismatch: buffer={}, validity={}",	×
80	buffer.len(),	×
81	len
82	);
83	}	8✔
84
85	// Shrink the buffer to remove any whole bytes.
86	let buffer = buffer.shrink_offset();	8✔
87	Self {	8✔
88	dtype: DType::Bool(validity.nullability()),	8✔
89	buffer,	8✔
90	validity,	8✔
91	stats_set: ArrayStats::default(),	8✔
92	}	8✔
93	}	8✔
94
95	/// Returns the underlying [`BooleanBuffer`] of the array.
96	pub fn boolean_buffer(&self) -> &BooleanBuffer {	40✔
97	assert!(	40✔
98	self.buffer.offset() < 8,	40✔
99	"Offset must be <8, did we forget to call shrink_offset? Found {}",	×
100	self.buffer.offset()	×
101	);
102	&self.buffer	40✔
103	}	40✔
104
105	/// Get a mutable version of this array.
106	///
107	/// If the caller holds the only reference to the underlying buffer the underlying buffer is returned
108	/// otherwise a copy is created.
109	///
110	/// The second value of the tuple is a bit_offset of first value in first byte of the returned builder
UNCOV 111	pub fn into_boolean_builder(self) -> (BooleanBufferBuilder, usize) {	×
UNCOV 112	let offset = self.buffer.offset();	×
UNCOV 113	let len = self.buffer.len();	×
UNCOV 114	let arrow_buffer = self.buffer.into_inner();	×
UNCOV 115	let mutable_buf = if arrow_buffer.ptr_offset() == 0 {	×
UNCOV 116	arrow_buffer.into_mutable().unwrap_or_else(\|b\| {	×
UNCOV 117	let mut buf = MutableBuffer::with_capacity(b.len());	×
UNCOV 118	buf.extend_from_slice(b.as_slice());	×
UNCOV 119	buf	×
UNCOV 120	})	×
121	} else {
122	let mut buf = MutableBuffer::with_capacity(arrow_buffer.len());	×
123	buf.extend_from_slice(arrow_buffer.as_slice());	×
124	buf	×
125	};
126
UNCOV 127	(	×
UNCOV 128	BooleanBufferBuilder::new_from_buffer(mutable_buf, offset + len),	×
UNCOV 129	offset,	×
UNCOV 130	)	×
UNCOV 131	}	×
132	}
133
134	impl From<BooleanBuffer> for BoolArray {
UNCOV 135	fn from(value: BooleanBuffer) -> Self {	×
UNCOV 136	Self::new(value, Validity::NonNullable)	×
UNCOV 137	}	×
138	}
139
140	impl FromIterator<bool> for BoolArray {
UNCOV 141	fn from_iter<T: IntoIterator<Item = bool>>(iter: T) -> Self {	×
UNCOV 142	Self::new(BooleanBuffer::from_iter(iter), Validity::NonNullable)	×
UNCOV 143	}	×
144	}
145
146	impl FromIterator<Option<bool>> for BoolArray {
UNCOV 147	fn from_iter<I: IntoIterator<Item = Option<bool>>>(iter: I) -> Self {	×
UNCOV 148	let (buffer, nulls) = BooleanArray::from_iter(iter).into_parts();	×
149
UNCOV 150	Self::new(	×
UNCOV 151	buffer,	×
UNCOV 152	nulls.map(Validity::from).unwrap_or(Validity::AllValid),	×
153	)
UNCOV 154	}	×
155	}
156
157	impl ValidityHelper for BoolArray {
UNCOV 158	fn validity(&self) -> &Validity {	×
UNCOV 159	&self.validity	×
UNCOV 160	}	×
161	}
162
163	impl ArrayVTable<BoolVTable> for BoolVTable {
164	fn len(array: &BoolArray) -> usize {	48✔
165	array.buffer.len()	48✔
166	}	48✔
167
168	fn dtype(array: &BoolArray) -> &DType {	16✔
169	&array.dtype	16✔
170	}	16✔
171
172	fn stats(array: &BoolArray) -> StatsSetRef<'_> {	16✔
173	array.stats_set.to_ref(array.as_ref())	16✔
174	}	16✔
175	}
176
177	impl CanonicalVTable<BoolVTable> for BoolVTable {
UNCOV 178	fn canonicalize(array: &BoolArray) -> VortexResult<Canonical> {	×
UNCOV 179	Ok(Canonical::Bool(array.clone()))	×
UNCOV 180	}	×
181
UNCOV 182	fn append_to_builder(array: &BoolArray, builder: &mut dyn ArrayBuilder) -> VortexResult<()> {	×
UNCOV 183	builder.extend_from_array(array.as_ref())	×
UNCOV 184	}	×
185	}
186
187	pub trait BooleanBufferExt {
188	/// Slice any full bytes from the buffer, leaving the offset < 8.
189	fn shrink_offset(self) -> Self;
190	}
191
192	impl BooleanBufferExt for BooleanBuffer {
193	fn shrink_offset(self) -> Self {	8✔
194	let byte_offset = self.offset() / 8;	8✔
195	let bit_offset = self.offset() % 8;	8✔
196	let len = self.len();	8✔
197	let buffer = self	8✔
198	.into_inner()	8✔
199	.slice_with_length(byte_offset, (len + bit_offset).div_ceil(8));	8✔
200	BooleanBuffer::new(buffer, bit_offset, len)	8✔
201	}	8✔
202	}
203
204	#[cfg(test)]
205	mod tests {
206	use arrow_buffer::{BooleanBuffer, BooleanBufferBuilder};
207	use vortex_buffer::buffer;
208
209	use crate::arrays::{BoolArray, PrimitiveArray};
210	use crate::patches::Patches;
211	use crate::validity::Validity;
212	use crate::vtable::ValidityHelper;
213	use crate::{Array, IntoArray, ToCanonical};
214
215	#[test]
216	fn bool_array() {
217	let arr = BoolArray::from_iter([true, false, true]);
218	let scalar = bool::try_from(&arr.scalar_at(0).unwrap()).unwrap();
219	assert!(scalar);
220	}
221
222	#[test]
223	fn test_all_some_iter() {
224	let arr = BoolArray::from_iter([Some(true), Some(false)]);
225
226	assert!(matches!(arr.validity(), Validity::AllValid));
227
228	let scalar = bool::try_from(&arr.scalar_at(0).unwrap()).unwrap();
229	assert!(scalar);
230	let scalar = bool::try_from(&arr.scalar_at(1).unwrap()).unwrap();
231	assert!(!scalar);
232	}
233
234	#[test]
235	fn test_bool_from_iter() {
236	let arr = BoolArray::from_iter([Some(true), Some(true), None, Some(false), None]);
237
238	let scalar = bool::try_from(&arr.scalar_at(0).unwrap()).unwrap();
239	assert!(scalar);
240
241	let scalar = bool::try_from(&arr.scalar_at(1).unwrap()).unwrap();
242	assert!(scalar);
243
244	let scalar = arr.scalar_at(2).unwrap();
245	assert!(scalar.is_null());
246
247	let scalar = bool::try_from(&arr.scalar_at(3).unwrap()).unwrap();
248	assert!(!scalar);
249
250	let scalar = arr.scalar_at(4).unwrap();
251	assert!(scalar.is_null());
252	}
253
254	#[test]
255	fn patch_sliced_bools() {
256	let arr = {
257	let mut builder = BooleanBufferBuilder::new(12);
258	builder.append(false);
259	builder.append_n(11, true);
260	BoolArray::from(builder.finish())
261	};
262	let sliced = arr.slice(4, 12).unwrap();
263	let sliced_len = sliced.len();
264	let (values, offset) = sliced.to_bool().unwrap().into_boolean_builder();
265	assert_eq!(offset, 4);
266	assert_eq!(values.as_slice(), &[254, 15]);
267
268	// patch the underlying array
269	let patches = Patches::new(
270	arr.len(),
271	0,
272	buffer![4u32].into_array(), // This creates a non-nullable array
273	BoolArray::from(BooleanBuffer::new_unset(1)).into_array(),
274	);
275	let arr = arr.patch(&patches).unwrap();
276	let arr_len = arr.len();
277	let (values, offset) = arr.to_bool().unwrap().into_boolean_builder();
278	assert_eq!(offset, 0);
279	assert_eq!(values.len(), arr_len + offset);
280	assert_eq!(values.as_slice(), &[238, 15]);
281
282	// the slice should be unchanged
283	let (values, offset) = sliced.to_bool().unwrap().into_boolean_builder();
284	assert_eq!(offset, 4);
285	assert_eq!(values.len(), sliced_len + offset);
286	assert_eq!(values.as_slice(), &[254, 15]); // unchanged
287	}
288
289	#[test]
290	fn slice_array_in_middle() {
291	let arr = BoolArray::from(BooleanBuffer::new_set(16));
292	let sliced = arr.slice(4, 12).unwrap();
293	let sliced_len = sliced.len();
294	let (values, offset) = sliced.to_bool().unwrap().into_boolean_builder();
295	assert_eq!(offset, 4);
296	assert_eq!(values.len(), sliced_len + offset);
297	assert_eq!(values.as_slice(), &[255, 15]);
298	}
299
300	#[test]
301	#[should_panic]
302	fn patch_bools_owned() {
303	let buffer = buffer![255u8; 2];
304	let buf = BooleanBuffer::new(buffer.into_arrow_buffer(), 0, 15);
305	let arr = BoolArray::new(buf, Validity::NonNullable);
306	let buf_ptr = arr.boolean_buffer().sliced().as_ptr();
307
308	let patches = Patches::new(
309	arr.len(),
310	0,
311	PrimitiveArray::new(buffer![0u32], Validity::AllValid).into_array(),
312	BoolArray::from(BooleanBuffer::new_unset(1)).into_array(),
313	);
314	let arr = arr.patch(&patches).unwrap();
315	assert_eq!(arr.boolean_buffer().sliced().as_ptr(), buf_ptr);
316
317	let (values, _byte_bit_offset) = arr.to_bool().unwrap().into_boolean_builder();
318	assert_eq!(values.as_slice(), &[254, 127]);
319	}
320	}

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