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
use crate::{
array::{Array, PrimitiveArray, StructArray},
bitmap::{Bitmap, MutableBitmap},
error::Result,
};
use super::Index;
#[inline]
fn take_validity<I: Index>(
validity: Option<&Bitmap>,
indices: &PrimitiveArray<I>,
) -> Result<Option<Bitmap>> {
let indices_validity = indices.validity();
match (validity, indices_validity) {
(None, _) => Ok(indices_validity.cloned()),
(Some(validity), None) => {
let iter = indices.values().iter().map(|index| {
let index = index.to_usize();
validity.get_bit(index)
});
Ok(MutableBitmap::from_trusted_len_iter(iter).into())
}
(Some(validity), _) => {
let iter = indices.iter().map(|x| match x {
Some(index) => {
let index = index.to_usize();
validity.get_bit(index)
}
None => false,
});
Ok(MutableBitmap::from_trusted_len_iter(iter).into())
}
}
}
pub fn take<I: Index>(array: &StructArray, indices: &PrimitiveArray<I>) -> Result<StructArray> {
let values: Vec<Box<dyn Array>> = array
.values()
.iter()
.map(|a| super::take(a.as_ref(), indices))
.collect::<Result<_>>()?;
let validity = take_validity(array.validity(), indices)?;
Ok(StructArray::new(
array.data_type().clone(),
values,
validity,
))
}