arrow2 0.7.1

Unofficial implementation of Apache Arrow spec in safe Rust
Documentation 
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

//! Declares the [`contains`] operator

use crate::types::NativeType;
use crate::{
    array::{Array, BinaryArray, BooleanArray, ListArray, Offset, PrimitiveArray, Utf8Array},
    bitmap::Bitmap,
};
use crate::{
    datatypes::DataType,
    error::{ArrowError, Result},
};

use super::utils::combine_validities;

/// Checks if a [`GenericListArray`] contains a value in the [`PrimitiveArray`]
/// The validity will be equal to the `And` of both arrays.
fn contains_primitive<T, O>(list: &ListArray<O>, values: &PrimitiveArray<T>) -> Result<BooleanArray>
where
    T: NativeType,
    O: Offset,
{
    if list.len() != values.len() {
        return Err(ArrowError::InvalidArgumentError(
            "Contains requires arrays of the same length".to_string(),
        ));
    }
    if list.values().data_type() != values.data_type() {
        return Err(ArrowError::InvalidArgumentError(
            "Contains requires the inner array to be of the same logical type".to_string(),
        ));
    }

    let validity = combine_validities(list.validity(), values.validity());

    let values = list.iter().zip(values.iter()).map(|(list, values)| {
        if list.is_none() | values.is_none() {
            // validity takes care of this
            return false;
        };
        let list = list.unwrap();
        let list = list.as_any().downcast_ref::<PrimitiveArray<T>>().unwrap();
        let values = values.unwrap();
        list.iter().any(|x| x.map(|x| x == values).unwrap_or(false))
    });
    let values = Bitmap::from_trusted_len_iter(values);

    Ok(BooleanArray::from_data(DataType::Boolean, values, validity))
}

/// Checks if a [`GenericListArray`] contains a value in the [`Utf8Array`]
fn contains_utf8<O, OO>(list: &ListArray<O>, values: &Utf8Array<OO>) -> Result<BooleanArray>
where
    O: Offset,
    OO: Offset,
{
    if list.len() != values.len() {
        return Err(ArrowError::InvalidArgumentError(
            "Contains requires arrays of the same length".to_string(),
        ));
    }
    if list.values().data_type() != values.data_type() {
        return Err(ArrowError::InvalidArgumentError(
            "Contains requires the inner array to be of the same logical type".to_string(),
        ));
    }

    let validity = combine_validities(list.validity(), values.validity());

    let values = list.iter().zip(values.iter()).map(|(list, values)| {
        if list.is_none() | values.is_none() {
            // validity takes care of this
            return false;
        };
        let list = list.unwrap();
        let list = list.as_any().downcast_ref::<Utf8Array<OO>>().unwrap();
        let values = values.unwrap();
        list.iter().any(|x| x.map(|x| x == values).unwrap_or(false))
    });
    let values = Bitmap::from_trusted_len_iter(values);

    Ok(BooleanArray::from_data(DataType::Boolean, values, validity))
}

/// Checks if a [`ListArray`] contains a value in the [`BinaryArray`]
fn contains_binary<O, OO>(list: &ListArray<O>, values: &BinaryArray<OO>) -> Result<BooleanArray>
where
    O: Offset,
    OO: Offset,
{
    if list.len() != values.len() {
        return Err(ArrowError::InvalidArgumentError(
            "Contains requires arrays of the same length".to_string(),
        ));
    }
    if list.values().data_type() != values.data_type() {
        return Err(ArrowError::InvalidArgumentError(
            "Contains requires the inner array to be of the same logical type".to_string(),
        ));
    }

    let validity = combine_validities(list.validity(), values.validity());

    let values = list.iter().zip(values.iter()).map(|(list, values)| {
        if list.is_none() | values.is_none() {
            // validity takes care of this
            return false;
        };
        let list = list.unwrap();
        let list = list.as_any().downcast_ref::<BinaryArray<OO>>().unwrap();
        let values = values.unwrap();
        list.iter().any(|x| x.map(|x| x == values).unwrap_or(false))
    });
    let values = Bitmap::from_trusted_len_iter(values);

    Ok(BooleanArray::from_data(DataType::Boolean, values, validity))
}

macro_rules! primitive {
    ($list:expr, $values:expr, $l_ty:ty, $r_ty:ty) => {{
        let list = $list.as_any().downcast_ref::<ListArray<$l_ty>>().unwrap();
        let values = $values
            .as_any()
            .downcast_ref::<PrimitiveArray<$r_ty>>()
            .unwrap();
        contains_primitive(list, values)
    }};
}

/// Returns whether each element in `values` is in each element from `list`
pub fn contains(list: &dyn Array, values: &dyn Array) -> Result<BooleanArray> {
    let list_data_type = list.data_type();
    let values_data_type = values.data_type();

    match (list_data_type, values_data_type) {
        (DataType::List(_), DataType::Utf8) => {
            let list = list.as_any().downcast_ref::<ListArray<i32>>().unwrap();
            let values = values.as_any().downcast_ref::<Utf8Array<i32>>().unwrap();
            contains_utf8(list, values)
        }
        (DataType::List(_), DataType::LargeUtf8) => {
            let list = list.as_any().downcast_ref::<ListArray<i32>>().unwrap();
            let values = values.as_any().downcast_ref::<Utf8Array<i64>>().unwrap();
            contains_utf8(list, values)
        }
        (DataType::LargeList(_), DataType::LargeUtf8) => {
            let list = list.as_any().downcast_ref::<ListArray<i64>>().unwrap();
            let values = values.as_any().downcast_ref::<Utf8Array<i64>>().unwrap();
            contains_utf8(list, values)
        }
        (DataType::LargeList(_), DataType::Utf8) => {
            let list = list.as_any().downcast_ref::<ListArray<i64>>().unwrap();
            let values = values.as_any().downcast_ref::<Utf8Array<i32>>().unwrap();
            contains_utf8(list, values)
        }
        (DataType::List(_), DataType::Binary) => {
            let list = list.as_any().downcast_ref::<ListArray<i32>>().unwrap();
            let values = values.as_any().downcast_ref::<BinaryArray<i32>>().unwrap();
            contains_binary(list, values)
        }
        (DataType::List(_), DataType::LargeBinary) => {
            let list = list.as_any().downcast_ref::<ListArray<i32>>().unwrap();
            let values = values.as_any().downcast_ref::<BinaryArray<i64>>().unwrap();
            contains_binary(list, values)
        }
        (DataType::LargeList(_), DataType::LargeBinary) => {
            let list = list.as_any().downcast_ref::<ListArray<i64>>().unwrap();
            let values = values.as_any().downcast_ref::<BinaryArray<i64>>().unwrap();
            contains_binary(list, values)
        }
        (DataType::LargeList(_), DataType::Binary) => {
            let list = list.as_any().downcast_ref::<ListArray<i64>>().unwrap();
            let values = values.as_any().downcast_ref::<BinaryArray<i32>>().unwrap();
            contains_binary(list, values)
        }
        (DataType::List(_), DataType::Int8) => primitive!(list, values, i32, i8),
        (DataType::List(_), DataType::Int16) => primitive!(list, values, i32, i16),
        (DataType::List(_), DataType::Int32) => primitive!(list, values, i32, i32),
        (DataType::List(_), DataType::Int64) => primitive!(list, values, i32, i64),
        (DataType::List(_), DataType::UInt8) => primitive!(list, values, i32, u8),
        (DataType::List(_), DataType::UInt16) => primitive!(list, values, i32, u16),
        (DataType::List(_), DataType::UInt32) => primitive!(list, values, i32, u32),
        (DataType::List(_), DataType::UInt64) => primitive!(list, values, i32, u64),
        (DataType::List(_), DataType::Float32) => primitive!(list, values, i32, f32),
        (DataType::List(_), DataType::Float64) => primitive!(list, values, i32, f64),
        (DataType::LargeList(_), DataType::Int8) => primitive!(list, values, i64, i8),
        (DataType::LargeList(_), DataType::Int16) => primitive!(list, values, i64, i16),
        (DataType::LargeList(_), DataType::Int32) => primitive!(list, values, i64, i32),
        (DataType::LargeList(_), DataType::Int64) => primitive!(list, values, i64, i64),
        (DataType::LargeList(_), DataType::UInt8) => primitive!(list, values, i64, u8),
        (DataType::LargeList(_), DataType::UInt16) => primitive!(list, values, i64, u16),
        (DataType::LargeList(_), DataType::UInt32) => primitive!(list, values, i64, u32),
        (DataType::LargeList(_), DataType::UInt64) => primitive!(list, values, i64, u64),
        (DataType::LargeList(_), DataType::Float32) => primitive!(list, values, i64, f32),
        (DataType::LargeList(_), DataType::Float64) => primitive!(list, values, i64, f64),
        _ => Err(ArrowError::NotYetImplemented(format!(
            "Contains is not supported between logical types \"{:?}\" and \"{:?}\"",
            list_data_type, values_data_type
        ))),
    }
}