vortex_array/array/sparse/compute/
mod.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
use vortex_dtype::match_each_integer_ptype;
use vortex_error::{VortexExpect, VortexResult, VortexUnwrap as _};
use vortex_scalar::Scalar;

use crate::array::sparse::SparseArray;
use crate::array::PrimitiveArray;
use crate::compute::unary::{scalar_at, scalar_at_unchecked, ScalarAtFn};
use crate::compute::{
    search_sorted, take, ArrayCompute, FilterFn, SearchResult, SearchSortedFn, SearchSortedSide,
    SliceFn, TakeFn,
};
use crate::{Array, IntoArray, IntoArrayVariant};

mod slice;
mod take;

impl ArrayCompute for SparseArray {
    fn scalar_at(&self) -> Option<&dyn ScalarAtFn> {
        Some(self)
    }

    fn search_sorted(&self) -> Option<&dyn SearchSortedFn> {
        Some(self)
    }

    fn slice(&self) -> Option<&dyn SliceFn> {
        Some(self)
    }

    fn take(&self) -> Option<&dyn TakeFn> {
        Some(self)
    }

    fn filter(&self) -> Option<&dyn FilterFn> {
        Some(self)
    }
}

impl ScalarAtFn for SparseArray {
    fn scalar_at(&self, index: usize) -> VortexResult<Scalar> {
        Ok(match self.search_index(index)?.to_found() {
            None => self.fill_scalar(),
            Some(idx) => scalar_at_unchecked(self.values(), idx),
        })
    }

    fn scalar_at_unchecked(&self, index: usize) -> Scalar {
        match self.search_index(index).vortex_unwrap().to_found() {
            None => self.fill_scalar(),
            Some(idx) => scalar_at_unchecked(self.values(), idx),
        }
    }
}

impl SearchSortedFn for SparseArray {
    fn search_sorted(&self, value: &Scalar, side: SearchSortedSide) -> VortexResult<SearchResult> {
        search_sorted(&self.values(), value.clone(), side).and_then(|sr| {
            let sidx = sr.to_offsets_index(self.metadata().indices_len);
            let index: usize = scalar_at(self.indices(), sidx)?.as_ref().try_into()?;
            Ok(match sr {
                SearchResult::Found(i) => SearchResult::Found(
                    if i == self.metadata().indices_len {
                        index + 1
                    } else {
                        index
                    } - self.indices_offset(),
                ),
                SearchResult::NotFound(i) => SearchResult::NotFound(
                    if i == 0 { index } else { index + 1 } - self.indices_offset(),
                ),
            })
        })
    }
}

impl FilterFn for SparseArray {
    fn filter(&self, predicate: &Array) -> VortexResult<Array> {
        let buffer = predicate.clone().into_bool()?.boolean_buffer();
        let mut coordinate_indices: Vec<u64> = Vec::new();
        let mut value_indices = Vec::new();
        let mut last_inserted_index = 0;

        let flat_indices = self
            .indices()
            .into_primitive()
            .vortex_expect("Failed to convert SparseArray indices to primitive array");
        match_each_integer_ptype!(flat_indices.ptype(), |$P| {
            let indices = flat_indices
                .maybe_null_slice::<$P>()
                .iter()
                .map(|v| (*v as usize) - self.indices_offset());
            for (value_idx, coordinate) in indices.enumerate() {
                if buffer.value(coordinate) {
                    // We count the number of truthy values between this coordinate and the previous truthy one
                    let adjusted_coordinate = buffer.slice(last_inserted_index, coordinate - last_inserted_index).count_set_bits() as u64;
                    coordinate_indices.push(adjusted_coordinate + coordinate_indices.last().copied().unwrap_or_default());
                    last_inserted_index = coordinate;
                    value_indices.push(value_idx as u64);
                }
            }
        });

        Ok(SparseArray::try_new(
            PrimitiveArray::from(coordinate_indices).into_array(),
            take(self.values(), PrimitiveArray::from(value_indices))?,
            buffer.count_set_bits(),
            self.fill_value().clone(),
        )?
        .into_array())
    }
}

#[cfg(test)]
mod test {
    use rstest::{fixture, rstest};
    use vortex_scalar::ScalarValue;

    use crate::array::primitive::PrimitiveArray;
    use crate::array::sparse::SparseArray;
    use crate::array::BoolArray;
    use crate::compute::{filter, search_sorted, slice, SearchResult, SearchSortedSide};
    use crate::validity::Validity;
    use crate::{Array, IntoArray, IntoArrayVariant};

    #[fixture]
    fn array() -> Array {
        SparseArray::try_new(
            PrimitiveArray::from(vec![2u64, 9, 15]).into_array(),
            PrimitiveArray::from_vec(vec![33_i32, 44, 55], Validity::AllValid).into_array(),
            20,
            ScalarValue::Null,
        )
        .unwrap()
        .into_array()
    }

    #[rstest]
    fn search_larger_than(array: Array) {
        let res = search_sorted(&array, 66, SearchSortedSide::Left).unwrap();
        assert_eq!(res, SearchResult::NotFound(16));
    }

    #[rstest]
    fn search_less_than(array: Array) {
        let res = search_sorted(&array, 22, SearchSortedSide::Left).unwrap();
        assert_eq!(res, SearchResult::NotFound(2));
    }

    #[rstest]
    fn search_found(array: Array) {
        let res = search_sorted(&array, 44, SearchSortedSide::Left).unwrap();
        assert_eq!(res, SearchResult::Found(9));
    }

    #[rstest]
    fn search_not_found_right(array: Array) {
        let res = search_sorted(&array, 56, SearchSortedSide::Right).unwrap();
        assert_eq!(res, SearchResult::NotFound(16));
    }

    #[rstest]
    fn search_sliced(array: Array) {
        let array = slice(&array, 7, 20).unwrap();
        assert_eq!(
            search_sorted(&array, 22, SearchSortedSide::Left).unwrap(),
            SearchResult::NotFound(2)
        );
    }

    #[test]
    fn search_right() {
        let array = SparseArray::try_new(
            PrimitiveArray::from(vec![0u64]).into_array(),
            PrimitiveArray::from_vec(vec![0u8], Validity::AllValid).into_array(),
            2,
            ScalarValue::Null,
        )
        .unwrap()
        .into_array();

        assert_eq!(
            search_sorted(&array, 0, SearchSortedSide::Right).unwrap(),
            SearchResult::Found(1)
        );
        assert_eq!(
            search_sorted(&array, 1, SearchSortedSide::Right).unwrap(),
            SearchResult::NotFound(1)
        );
    }

    #[rstest]
    fn test_filter(array: Array) {
        let mut predicate = vec![false, false, true];
        predicate.extend_from_slice(&[false; 17]);
        let predicate = BoolArray::from_vec(predicate, Validity::NonNullable).into_array();

        let filtered_array = filter(&array, &predicate).unwrap();
        let filtered_array = SparseArray::try_from(filtered_array).unwrap();

        assert_eq!(filtered_array.len(), 1);
        assert_eq!(filtered_array.values().len(), 1);
        assert_eq!(filtered_array.indices().len(), 1);
    }

    #[test]
    fn true_fill_value() {
        let predicate = BoolArray::from_vec(
            vec![false, true, false, true, false, true, true],
            Validity::NonNullable,
        )
        .into_array();
        let array = SparseArray::try_new(
            PrimitiveArray::from(vec![0_u64, 3, 6]).into_array(),
            PrimitiveArray::from_vec(vec![33_i32, 44, 55], Validity::AllValid).into_array(),
            7,
            ScalarValue::Null,
        )
        .unwrap()
        .into_array();

        let filtered_array = filter(&array, &predicate).unwrap();
        let filtered_array = SparseArray::try_from(filtered_array).unwrap();

        assert_eq!(filtered_array.len(), 4);
        let primitive = filtered_array.indices().into_primitive().unwrap();

        assert_eq!(primitive.maybe_null_slice::<u64>(), &[1, 3]);
    }
}