forked from apache/arrow-rs
-
Notifications
You must be signed in to change notification settings - Fork 0
/
mod.rs
1715 lines (1537 loc) · 58.6 KB
/
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
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
use super::{
data::{into_buffers, new_buffers},
ArrayData, ArrayDataBuilder, OffsetSizeTrait,
};
use crate::{
buffer::MutableBuffer,
datatypes::DataType,
error::{ArrowError, Result},
util::bit_util,
};
use half::f16;
use std::mem;
mod boolean;
mod fixed_binary;
mod fixed_size_list;
mod list;
mod null;
mod primitive;
mod structure;
mod union;
mod utils;
mod variable_size;
type ExtendNullBits<'a> = Box<dyn Fn(&mut _MutableArrayData, usize, usize) + 'a>;
// function that extends `[start..start+len]` to the mutable array.
// this is dynamic because different data_types influence how buffers and children are extended.
type Extend<'a> = Box<dyn Fn(&mut _MutableArrayData, usize, usize, usize) + 'a>;
type ExtendNulls = Box<dyn Fn(&mut _MutableArrayData, usize)>;
/// A mutable [ArrayData] that knows how to freeze itself into an [ArrayData].
/// This is just a data container.
#[derive(Debug)]
struct _MutableArrayData<'a> {
pub data_type: DataType,
pub null_count: usize,
pub len: usize,
pub null_buffer: MutableBuffer,
// arrow specification only allows up to 3 buffers (2 ignoring the nulls above).
// Thus, we place them in the stack to avoid bound checks and greater data locality.
pub buffer1: MutableBuffer,
pub buffer2: MutableBuffer,
pub child_data: Vec<MutableArrayData<'a>>,
}
impl<'a> _MutableArrayData<'a> {
fn freeze(self, dictionary: Option<ArrayData>) -> ArrayDataBuilder {
let buffers = into_buffers(&self.data_type, self.buffer1, self.buffer2);
let child_data = match self.data_type {
DataType::Dictionary(_, _) => vec![dictionary.unwrap()],
_ => {
let mut child_data = Vec::with_capacity(self.child_data.len());
for child in self.child_data {
child_data.push(child.freeze());
}
child_data
}
};
ArrayDataBuilder::new(self.data_type)
.offset(0)
.len(self.len)
.null_count(self.null_count)
.buffers(buffers)
.child_data(child_data)
.null_bit_buffer((self.null_count > 0).then(|| self.null_buffer.into()))
}
}
fn build_extend_null_bits(array: &ArrayData, use_nulls: bool) -> ExtendNullBits {
if let Some(bitmap) = array.null_bitmap() {
let bytes = bitmap.bits.as_slice();
Box::new(move |mutable, start, len| {
utils::resize_for_bits(&mut mutable.null_buffer, mutable.len + len);
mutable.null_count += crate::util::bit_mask::set_bits(
mutable.null_buffer.as_slice_mut(),
bytes,
mutable.len,
array.offset() + start,
len,
);
})
} else if use_nulls {
Box::new(|mutable, _, len| {
utils::resize_for_bits(&mut mutable.null_buffer, mutable.len + len);
let write_data = mutable.null_buffer.as_slice_mut();
let offset = mutable.len;
(0..len).for_each(|i| {
bit_util::set_bit(write_data, offset + i);
});
})
} else {
Box::new(|_, _, _| {})
}
}
/// Struct to efficiently and interactively create an [ArrayData] from an existing [ArrayData] by
/// copying chunks.
/// The main use case of this struct is to perform unary operations to arrays of arbitrary types, such as `filter` and `take`.
/// # Example:
///
/// ```
/// use arrow::{array::{Int32Array, Array, MutableArrayData}};
///
/// let array = Int32Array::from(vec![1, 2, 3, 4, 5]);
/// let array = array.data();
/// // Create a new `MutableArrayData` from an array and with a capacity of 4.
/// // Capacity here is equivalent to `Vec::with_capacity`
/// let arrays = vec![array];
/// let mut mutable = MutableArrayData::new(arrays, false, 4);
/// mutable.extend(0, 1, 3); // extend from the slice [1..3], [2,3]
/// mutable.extend(0, 0, 3); // extend from the slice [0..3], [1,2,3]
/// // `.freeze()` to convert `MutableArrayData` into a `ArrayData`.
/// let new_array = Int32Array::from(mutable.freeze());
/// assert_eq!(Int32Array::from(vec![2, 3, 1, 2, 3]), new_array);
/// ```
pub struct MutableArrayData<'a> {
#[allow(dead_code)]
arrays: Vec<&'a ArrayData>,
// The attributes in [_MutableArrayData] cannot be in [MutableArrayData] due to
// mutability invariants (interior mutability):
// [MutableArrayData] contains a function that can only mutate [_MutableArrayData], not
// [MutableArrayData] itself
data: _MutableArrayData<'a>,
// the child data of the `Array` in Dictionary arrays.
// This is not stored in `MutableArrayData` because these values constant and only needed
// at the end, when freezing [_MutableArrayData].
dictionary: Option<ArrayData>,
// function used to extend values from arrays. This function's lifetime is bound to the array
// because it reads values from it.
extend_values: Vec<Extend<'a>>,
// function used to extend nulls from arrays. This function's lifetime is bound to the array
// because it reads nulls from it.
extend_null_bits: Vec<ExtendNullBits<'a>>,
// function used to extend nulls.
// this is independent of the arrays and therefore has no lifetime.
extend_nulls: ExtendNulls,
}
impl<'a> std::fmt::Debug for MutableArrayData<'a> {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
// ignores the closures.
f.debug_struct("MutableArrayData")
.field("data", &self.data)
.finish()
}
}
/// Builds an extend that adds `offset` to the source primitive
/// Additionally validates that `max` fits into the
/// the underlying primitive returning None if not
fn build_extend_dictionary(
array: &ArrayData,
offset: usize,
max: usize,
) -> Option<Extend> {
use crate::datatypes::*;
macro_rules! validate_and_build {
($dt: ty) => {{
let _: $dt = max.try_into().ok()?;
let offset: $dt = offset.try_into().ok()?;
Some(primitive::build_extend_with_offset(array, offset))
}};
}
match array.data_type() {
DataType::Dictionary(child_data_type, _) => match child_data_type.as_ref() {
DataType::UInt8 => validate_and_build!(u8),
DataType::UInt16 => validate_and_build!(u16),
DataType::UInt32 => validate_and_build!(u32),
DataType::UInt64 => validate_and_build!(u64),
DataType::Int8 => validate_and_build!(i8),
DataType::Int16 => validate_and_build!(i16),
DataType::Int32 => validate_and_build!(i32),
DataType::Int64 => validate_and_build!(i64),
_ => unreachable!(),
},
_ => None,
}
}
fn build_extend(array: &ArrayData) -> Extend {
use crate::datatypes::*;
match array.data_type() {
DataType::Decimal128(_, _) => primitive::build_extend::<i128>(array),
DataType::Null => null::build_extend(array),
DataType::Boolean => boolean::build_extend(array),
DataType::UInt8 => primitive::build_extend::<u8>(array),
DataType::UInt16 => primitive::build_extend::<u16>(array),
DataType::UInt32 => primitive::build_extend::<u32>(array),
DataType::UInt64 => primitive::build_extend::<u64>(array),
DataType::Int8 => primitive::build_extend::<i8>(array),
DataType::Int16 => primitive::build_extend::<i16>(array),
DataType::Int32 => primitive::build_extend::<i32>(array),
DataType::Int64 => primitive::build_extend::<i64>(array),
DataType::Float32 => primitive::build_extend::<f32>(array),
DataType::Float64 => primitive::build_extend::<f64>(array),
DataType::Date32
| DataType::Time32(_)
| DataType::Interval(IntervalUnit::YearMonth) => {
primitive::build_extend::<i32>(array)
}
DataType::Date64
| DataType::Time64(_)
| DataType::Timestamp(_, _)
| DataType::Duration(_)
| DataType::Interval(IntervalUnit::DayTime) => {
primitive::build_extend::<i64>(array)
}
DataType::Interval(IntervalUnit::MonthDayNano) => {
primitive::build_extend::<i128>(array)
}
DataType::Utf8 | DataType::Binary => variable_size::build_extend::<i32>(array),
DataType::LargeUtf8 | DataType::LargeBinary => {
variable_size::build_extend::<i64>(array)
}
DataType::Map(_, _) | DataType::List(_) => list::build_extend::<i32>(array),
DataType::LargeList(_) => list::build_extend::<i64>(array),
DataType::Dictionary(_, _) => unreachable!("should use build_extend_dictionary"),
DataType::Struct(_) => structure::build_extend(array),
DataType::FixedSizeBinary(_) | DataType::Decimal256(_, _) => {
fixed_binary::build_extend(array)
}
DataType::Float16 => primitive::build_extend::<f16>(array),
DataType::FixedSizeList(_, _) => fixed_size_list::build_extend(array),
DataType::Union(_, _, mode) => match mode {
UnionMode::Sparse => union::build_extend_sparse(array),
UnionMode::Dense => union::build_extend_dense(array),
},
}
}
fn build_extend_nulls(data_type: &DataType) -> ExtendNulls {
use crate::datatypes::*;
Box::new(match data_type {
DataType::Decimal128(_, _) => primitive::extend_nulls::<i128>,
DataType::Null => null::extend_nulls,
DataType::Boolean => boolean::extend_nulls,
DataType::UInt8 => primitive::extend_nulls::<u8>,
DataType::UInt16 => primitive::extend_nulls::<u16>,
DataType::UInt32 => primitive::extend_nulls::<u32>,
DataType::UInt64 => primitive::extend_nulls::<u64>,
DataType::Int8 => primitive::extend_nulls::<i8>,
DataType::Int16 => primitive::extend_nulls::<i16>,
DataType::Int32 => primitive::extend_nulls::<i32>,
DataType::Int64 => primitive::extend_nulls::<i64>,
DataType::Float32 => primitive::extend_nulls::<f32>,
DataType::Float64 => primitive::extend_nulls::<f64>,
DataType::Date32
| DataType::Time32(_)
| DataType::Interval(IntervalUnit::YearMonth) => primitive::extend_nulls::<i32>,
DataType::Date64
| DataType::Time64(_)
| DataType::Timestamp(_, _)
| DataType::Duration(_)
| DataType::Interval(IntervalUnit::DayTime) => primitive::extend_nulls::<i64>,
DataType::Interval(IntervalUnit::MonthDayNano) => primitive::extend_nulls::<i128>,
DataType::Utf8 | DataType::Binary => variable_size::extend_nulls::<i32>,
DataType::LargeUtf8 | DataType::LargeBinary => variable_size::extend_nulls::<i64>,
DataType::Map(_, _) | DataType::List(_) => list::extend_nulls::<i32>,
DataType::LargeList(_) => list::extend_nulls::<i64>,
DataType::Dictionary(child_data_type, _) => match child_data_type.as_ref() {
DataType::UInt8 => primitive::extend_nulls::<u8>,
DataType::UInt16 => primitive::extend_nulls::<u16>,
DataType::UInt32 => primitive::extend_nulls::<u32>,
DataType::UInt64 => primitive::extend_nulls::<u64>,
DataType::Int8 => primitive::extend_nulls::<i8>,
DataType::Int16 => primitive::extend_nulls::<i16>,
DataType::Int32 => primitive::extend_nulls::<i32>,
DataType::Int64 => primitive::extend_nulls::<i64>,
_ => unreachable!(),
},
DataType::Struct(_) => structure::extend_nulls,
DataType::FixedSizeBinary(_) | DataType::Decimal256(_, _) => {
fixed_binary::extend_nulls
}
DataType::Float16 => primitive::extend_nulls::<f16>,
DataType::FixedSizeList(_, _) => fixed_size_list::extend_nulls,
DataType::Union(_, _, mode) => match mode {
UnionMode::Sparse => union::extend_nulls_sparse,
UnionMode::Dense => union::extend_nulls_dense,
},
})
}
fn preallocate_offset_and_binary_buffer<Offset: OffsetSizeTrait>(
capacity: usize,
binary_size: usize,
) -> [MutableBuffer; 2] {
// offsets
let mut buffer = MutableBuffer::new((1 + capacity) * mem::size_of::<Offset>());
// safety: `unsafe` code assumes that this buffer is initialized with one element
buffer.push(Offset::zero());
[
buffer,
MutableBuffer::new(binary_size * mem::size_of::<u8>()),
]
}
/// Define capacities of child data or data buffers.
#[derive(Debug, Clone)]
pub enum Capacities {
/// Binary, Utf8 and LargeUtf8 data types
/// Define
/// * the capacity of the array offsets
/// * the capacity of the binary/ str buffer
Binary(usize, Option<usize>),
/// List and LargeList data types
/// Define
/// * the capacity of the array offsets
/// * the capacity of the child data
List(usize, Option<Box<Capacities>>),
/// Struct type
/// * the capacity of the array
/// * the capacities of the fields
Struct(usize, Option<Vec<Capacities>>),
/// Dictionary type
/// * the capacity of the array/keys
/// * the capacity of the values
Dictionary(usize, Option<Box<Capacities>>),
/// Don't preallocate inner buffers and rely on array growth strategy
Array(usize),
}
impl<'a> MutableArrayData<'a> {
/// returns a new [MutableArrayData] with capacity to `capacity` slots and specialized to create an
/// [ArrayData] from multiple `arrays`.
///
/// `use_nulls` is a flag used to optimize insertions. It should be `false` if the only source of nulls
/// are the arrays themselves and `true` if the user plans to call [MutableArrayData::extend_nulls].
/// In other words, if `use_nulls` is `false`, calling [MutableArrayData::extend_nulls] should not be used.
pub fn new(arrays: Vec<&'a ArrayData>, use_nulls: bool, capacity: usize) -> Self {
Self::with_capacities(arrays, use_nulls, Capacities::Array(capacity))
}
/// Similar to [MutableArrayData::new], but lets users define the preallocated capacities of the array.
/// See also [MutableArrayData::new] for more information on the arguments.
///
/// # Panic
/// This function panics if the given `capacities` don't match the data type of `arrays`. Or when
/// a [Capacities] variant is not yet supported.
pub fn with_capacities(
arrays: Vec<&'a ArrayData>,
use_nulls: bool,
capacities: Capacities,
) -> Self {
let data_type = arrays[0].data_type();
use crate::datatypes::*;
// if any of the arrays has nulls, insertions from any array requires setting bits
// as there is at least one array with nulls.
let use_nulls = use_nulls | arrays.iter().any(|array| array.null_count() > 0);
let mut array_capacity;
let [buffer1, buffer2] = match (data_type, &capacities) {
(
DataType::LargeUtf8 | DataType::LargeBinary,
Capacities::Binary(capacity, Some(value_cap)),
) => {
array_capacity = *capacity;
preallocate_offset_and_binary_buffer::<i64>(*capacity, *value_cap)
}
(
DataType::Utf8 | DataType::Binary,
Capacities::Binary(capacity, Some(value_cap)),
) => {
array_capacity = *capacity;
preallocate_offset_and_binary_buffer::<i32>(*capacity, *value_cap)
}
(_, Capacities::Array(capacity)) => {
array_capacity = *capacity;
new_buffers(data_type, *capacity)
}
(
DataType::List(_) | DataType::LargeList(_),
Capacities::List(capacity, _),
) => {
array_capacity = *capacity;
new_buffers(data_type, *capacity)
}
_ => panic!("Capacities: {:?} not yet supported", capacities),
};
let child_data = match &data_type {
DataType::Decimal128(_, _)
| DataType::Decimal256(_, _)
| DataType::Null
| DataType::Boolean
| DataType::UInt8
| DataType::UInt16
| DataType::UInt32
| DataType::UInt64
| DataType::Int8
| DataType::Int16
| DataType::Int32
| DataType::Int64
| DataType::Float16
| DataType::Float32
| DataType::Float64
| DataType::Date32
| DataType::Date64
| DataType::Time32(_)
| DataType::Time64(_)
| DataType::Duration(_)
| DataType::Timestamp(_, _)
| DataType::Utf8
| DataType::Binary
| DataType::LargeUtf8
| DataType::LargeBinary
| DataType::Interval(_)
| DataType::FixedSizeBinary(_) => vec![],
DataType::Map(_, _) | DataType::List(_) | DataType::LargeList(_) => {
let childs = arrays
.iter()
.map(|array| &array.child_data()[0])
.collect::<Vec<_>>();
let capacities = if let Capacities::List(capacity, ref child_capacities) =
capacities
{
child_capacities
.clone()
.map(|c| *c)
.unwrap_or(Capacities::Array(capacity))
} else {
Capacities::Array(array_capacity)
};
vec![MutableArrayData::with_capacities(
childs, use_nulls, capacities,
)]
}
// the dictionary type just appends keys and clones the values.
DataType::Dictionary(_, _) => vec![],
DataType::Struct(fields) => match capacities {
Capacities::Struct(capacity, Some(ref child_capacities)) => {
array_capacity = capacity;
(0..fields.len())
.zip(child_capacities)
.map(|(i, child_cap)| {
let child_arrays = arrays
.iter()
.map(|array| &array.child_data()[i])
.collect::<Vec<_>>();
MutableArrayData::with_capacities(
child_arrays,
use_nulls,
child_cap.clone(),
)
})
.collect::<Vec<_>>()
}
Capacities::Struct(capacity, None) => {
array_capacity = capacity;
(0..fields.len())
.map(|i| {
let child_arrays = arrays
.iter()
.map(|array| &array.child_data()[i])
.collect::<Vec<_>>();
MutableArrayData::new(child_arrays, use_nulls, capacity)
})
.collect::<Vec<_>>()
}
_ => (0..fields.len())
.map(|i| {
let child_arrays = arrays
.iter()
.map(|array| &array.child_data()[i])
.collect::<Vec<_>>();
MutableArrayData::new(child_arrays, use_nulls, array_capacity)
})
.collect::<Vec<_>>(),
},
DataType::FixedSizeList(_, _) => {
let childs = arrays
.iter()
.map(|array| &array.child_data()[0])
.collect::<Vec<_>>();
vec![MutableArrayData::new(childs, use_nulls, array_capacity)]
}
DataType::Union(fields, _, _) => (0..fields.len())
.map(|i| {
let child_arrays = arrays
.iter()
.map(|array| &array.child_data()[i])
.collect::<Vec<_>>();
MutableArrayData::new(child_arrays, use_nulls, array_capacity)
})
.collect::<Vec<_>>(),
};
// Get the dictionary if any, and if it is a concatenation of multiple
let (dictionary, dict_concat) = match &data_type {
DataType::Dictionary(_, _) => {
// If more than one dictionary, concatenate dictionaries together
let dict_concat = !arrays
.windows(2)
.all(|a| a[0].child_data()[0].ptr_eq(&a[1].child_data()[0]));
match dict_concat {
false => (Some(arrays[0].child_data()[0].clone()), false),
true => {
if let Capacities::Dictionary(_, _) = capacities {
panic!("dictionary capacity not yet supported")
}
let dictionaries: Vec<_> =
arrays.iter().map(|array| &array.child_data()[0]).collect();
let lengths: Vec<_> = dictionaries
.iter()
.map(|dictionary| dictionary.len())
.collect();
let capacity = lengths.iter().sum();
let mut mutable =
MutableArrayData::new(dictionaries, false, capacity);
for (i, len) in lengths.iter().enumerate() {
mutable.extend(i, 0, *len)
}
(Some(mutable.freeze()), true)
}
}
}
_ => (None, false),
};
let extend_nulls = build_extend_nulls(data_type);
let extend_null_bits = arrays
.iter()
.map(|array| build_extend_null_bits(array, use_nulls))
.collect();
let null_buffer = if use_nulls {
let null_bytes = bit_util::ceil(array_capacity, 8);
MutableBuffer::from_len_zeroed(null_bytes)
} else {
// create 0 capacity mutable buffer with the intention that it won't be used
MutableBuffer::with_capacity(0)
};
let extend_values = match &data_type {
DataType::Dictionary(_, _) => {
let mut next_offset = 0;
let extend_values: Result<Vec<_>> = arrays
.iter()
.map(|array| {
let offset = next_offset;
let dict_len = array.child_data()[0].len();
if dict_concat {
next_offset += dict_len;
}
build_extend_dictionary(array, offset, offset + dict_len)
.ok_or(ArrowError::DictionaryKeyOverflowError)
})
.collect();
extend_values.expect("MutableArrayData::new is infallible")
}
_ => arrays.iter().map(|array| build_extend(array)).collect(),
};
let data = _MutableArrayData {
data_type: data_type.clone(),
len: 0,
null_count: 0,
null_buffer,
buffer1,
buffer2,
child_data,
};
Self {
arrays,
data,
dictionary,
extend_values,
extend_null_bits,
extend_nulls,
}
}
/// Extends this array with a chunk of its source arrays
///
/// # Arguments
/// * `index` - the index of array that you what to copy values from
/// * `start` - the start index of the chunk (inclusive)
/// * `end` - the end index of the chunk (exclusive)
///
/// # Panic
/// This function panics if there is an invalid index,
/// i.e. `index` >= the number of source arrays
/// or `end` > the length of the `index`th array
pub fn extend(&mut self, index: usize, start: usize, end: usize) {
let len = end - start;
(self.extend_null_bits[index])(&mut self.data, start, len);
(self.extend_values[index])(&mut self.data, index, start, len);
self.data.len += len;
}
/// Extends this [MutableArrayData] with null elements, disregarding the bound arrays
pub fn extend_nulls(&mut self, len: usize) {
// TODO: null_buffer should probably be extended here as well
// otherwise is_valid() could later panic
// add test to confirm
self.data.null_count += len;
(self.extend_nulls)(&mut self.data, len);
self.data.len += len;
}
/// Returns the current length
#[inline]
pub fn len(&self) -> usize {
self.data.len
}
/// Returns true if len is 0
#[inline]
pub fn is_empty(&self) -> bool {
self.data.len == 0
}
/// Returns the current null count
#[inline]
pub fn null_count(&self) -> usize {
self.data.null_count
}
/// Creates a [ArrayData] from the pushed regions up to this point, consuming `self`.
pub fn freeze(self) -> ArrayData {
unsafe { self.data.freeze(self.dictionary).build_unchecked() }
}
/// Creates a [ArrayDataBuilder] from the pushed regions up to this point, consuming `self`.
/// This is useful for extending the default behavior of MutableArrayData.
pub fn into_builder(self) -> ArrayDataBuilder {
self.data.freeze(self.dictionary)
}
}
#[cfg(test)]
mod tests {
use std::{convert::TryFrom, sync::Arc};
use super::*;
use crate::array::Decimal128Array;
use crate::{
array::{
Array, ArrayData, ArrayRef, BooleanArray, DictionaryArray,
FixedSizeBinaryArray, Int16Array, Int16Type, Int32Array, Int64Array,
Int64Builder, ListBuilder, MapBuilder, NullArray, StringArray,
StringDictionaryBuilder, StructArray, UInt8Array,
},
buffer::Buffer,
datatypes::Field,
};
use crate::{
array::{ListArray, StringBuilder},
error::Result,
};
fn create_decimal_array(
array: Vec<Option<i128>>,
precision: u8,
scale: u8,
) -> Decimal128Array {
array
.into_iter()
.collect::<Decimal128Array>()
.with_precision_and_scale(precision, scale)
.unwrap()
}
#[test]
#[cfg(not(feature = "force_validate"))]
fn test_decimal() {
let decimal_array =
create_decimal_array(vec![Some(1), Some(2), None, Some(3)], 10, 3);
let arrays = vec![Array::data(&decimal_array)];
let mut a = MutableArrayData::new(arrays, true, 3);
a.extend(0, 0, 3);
a.extend(0, 2, 3);
let result = a.freeze();
let array = Decimal128Array::from(result);
let expected = create_decimal_array(vec![Some(1), Some(2), None, None], 10, 3);
assert_eq!(array, expected);
}
#[test]
#[cfg(not(feature = "force_validate"))]
fn test_decimal_offset() {
let decimal_array =
create_decimal_array(vec![Some(1), Some(2), None, Some(3)], 10, 3);
let decimal_array = decimal_array.slice(1, 3); // 2, null, 3
let arrays = vec![decimal_array.data()];
let mut a = MutableArrayData::new(arrays, true, 2);
a.extend(0, 0, 2); // 2, null
let result = a.freeze();
let array = Decimal128Array::from(result);
let expected = create_decimal_array(vec![Some(2), None], 10, 3);
assert_eq!(array, expected);
}
#[test]
#[cfg(not(feature = "force_validate"))]
fn test_decimal_null_offset_nulls() {
let decimal_array =
create_decimal_array(vec![Some(1), Some(2), None, Some(3)], 10, 3);
let decimal_array = decimal_array.slice(1, 3); // 2, null, 3
let arrays = vec![decimal_array.data()];
let mut a = MutableArrayData::new(arrays, true, 2);
a.extend(0, 0, 2); // 2, null
a.extend_nulls(3); // 2, null, null, null, null
a.extend(0, 1, 3); //2, null, null, null, null, null, 3
let result = a.freeze();
let array = Decimal128Array::from(result);
let expected = create_decimal_array(
vec![Some(2), None, None, None, None, None, Some(3)],
10,
3,
);
assert_eq!(array, expected);
}
/// tests extending from a primitive array w/ offset nor nulls
#[test]
fn test_primitive() {
let b = UInt8Array::from(vec![Some(1), Some(2), Some(3)]);
let arrays = vec![b.data()];
let mut a = MutableArrayData::new(arrays, false, 3);
a.extend(0, 0, 2);
let result = a.freeze();
let array = UInt8Array::from(result);
let expected = UInt8Array::from(vec![Some(1), Some(2)]);
assert_eq!(array, expected);
}
/// tests extending from a primitive array with offset w/ nulls
#[test]
fn test_primitive_offset() {
let b = UInt8Array::from(vec![Some(1), Some(2), Some(3)]);
let b = b.slice(1, 2);
let arrays = vec![b.data()];
let mut a = MutableArrayData::new(arrays, false, 2);
a.extend(0, 0, 2);
let result = a.freeze();
let array = UInt8Array::from(result);
let expected = UInt8Array::from(vec![Some(2), Some(3)]);
assert_eq!(array, expected);
}
/// tests extending from a primitive array with offset and nulls
#[test]
fn test_primitive_null_offset() {
let b = UInt8Array::from(vec![Some(1), None, Some(3)]);
let b = b.slice(1, 2);
let arrays = vec![b.data()];
let mut a = MutableArrayData::new(arrays, false, 2);
a.extend(0, 0, 2);
let result = a.freeze();
let array = UInt8Array::from(result);
let expected = UInt8Array::from(vec![None, Some(3)]);
assert_eq!(array, expected);
}
#[test]
fn test_primitive_null_offset_nulls() {
let b = UInt8Array::from(vec![Some(1), Some(2), Some(3)]);
let b = b.slice(1, 2);
let arrays = vec![b.data()];
let mut a = MutableArrayData::new(arrays, true, 2);
a.extend(0, 0, 2);
a.extend_nulls(3);
a.extend(0, 1, 2);
let result = a.freeze();
let array = UInt8Array::from(result);
let expected =
UInt8Array::from(vec![Some(2), Some(3), None, None, None, Some(3)]);
assert_eq!(array, expected);
}
#[test]
fn test_list_null_offset() {
let int_builder = Int64Builder::with_capacity(24);
let mut builder = ListBuilder::<Int64Builder>::new(int_builder);
builder.values().append_slice(&[1, 2, 3]);
builder.append(true);
builder.values().append_slice(&[4, 5]);
builder.append(true);
builder.values().append_slice(&[6, 7, 8]);
builder.append(true);
let array = builder.finish();
let arrays = vec![array.data()];
let mut mutable = MutableArrayData::new(arrays, false, 0);
mutable.extend(0, 0, 1);
let result = mutable.freeze();
let array = ListArray::from(result);
let int_builder = Int64Builder::with_capacity(24);
let mut builder = ListBuilder::<Int64Builder>::new(int_builder);
builder.values().append_slice(&[1, 2, 3]);
builder.append(true);
let expected = builder.finish();
assert_eq!(array, expected);
}
/// tests extending from a variable-sized (strings and binary) array w/ offset with nulls
#[test]
fn test_variable_sized_nulls() {
let array = StringArray::from(vec![Some("a"), Some("bc"), None, Some("defh")]);
let arrays = vec![array.data()];
let mut mutable = MutableArrayData::new(arrays, false, 0);
mutable.extend(0, 1, 3);
let result = mutable.freeze();
let result = StringArray::from(result);
let expected = StringArray::from(vec![Some("bc"), None]);
assert_eq!(result, expected);
}
/// tests extending from a variable-sized (strings and binary) array
/// with an offset and nulls
#[test]
fn test_variable_sized_offsets() {
let array = StringArray::from(vec![Some("a"), Some("bc"), None, Some("defh")]);
let array = array.slice(1, 3);
let arrays = vec![array.data()];
let mut mutable = MutableArrayData::new(arrays, false, 0);
mutable.extend(0, 0, 3);
let result = mutable.freeze();
let result = StringArray::from(result);
let expected = StringArray::from(vec![Some("bc"), None, Some("defh")]);
assert_eq!(result, expected);
}
#[test]
fn test_string_offsets() {
let array = StringArray::from(vec![Some("a"), Some("bc"), None, Some("defh")]);
let array = array.slice(1, 3);
let arrays = vec![array.data()];
let mut mutable = MutableArrayData::new(arrays, false, 0);
mutable.extend(0, 0, 3);
let result = mutable.freeze();
let result = StringArray::from(result);
let expected = StringArray::from(vec![Some("bc"), None, Some("defh")]);
assert_eq!(result, expected);
}
#[test]
fn test_multiple_with_nulls() {
let array1 = StringArray::from(vec!["hello", "world"]);
let array2 = StringArray::from(vec![Some("1"), None]);
let arrays = vec![array1.data(), array2.data()];
let mut mutable = MutableArrayData::new(arrays, false, 5);
mutable.extend(0, 0, 2);
mutable.extend(1, 0, 2);
let result = mutable.freeze();
let result = StringArray::from(result);
let expected =
StringArray::from(vec![Some("hello"), Some("world"), Some("1"), None]);
assert_eq!(result, expected);
}
#[test]
fn test_string_null_offset_nulls() {
let array = StringArray::from(vec![Some("a"), Some("bc"), None, Some("defh")]);
let array = array.slice(1, 3);
let arrays = vec![array.data()];
let mut mutable = MutableArrayData::new(arrays, true, 0);
mutable.extend(0, 1, 3);
mutable.extend_nulls(1);
let result = mutable.freeze();
let result = StringArray::from(result);
let expected = StringArray::from(vec![None, Some("defh"), None]);
assert_eq!(result, expected);
}
#[test]
fn test_bool() {
let array = BooleanArray::from(vec![Some(false), Some(true), None, Some(false)]);
let arrays = vec![array.data()];
let mut mutable = MutableArrayData::new(arrays, false, 0);
mutable.extend(0, 1, 3);
let result = mutable.freeze();
let result = BooleanArray::from(result);
let expected = BooleanArray::from(vec![Some(true), None]);
assert_eq!(result, expected);
}
#[test]
fn test_null() {
let array1 = NullArray::new(10);
let array2 = NullArray::new(5);
let arrays = vec![array1.data(), array2.data()];
let mut mutable = MutableArrayData::new(arrays, false, 0);
mutable.extend(0, 1, 3);
mutable.extend(1, 0, 1);
let result = mutable.freeze();
let result = NullArray::from(result);
let expected = NullArray::new(3);
assert_eq!(result, expected);
}
fn create_dictionary_array(values: &[&str], keys: &[Option<&str>]) -> ArrayData {
let values = StringArray::from(values.to_vec());
let mut builder = StringDictionaryBuilder::<Int16Type>::new_with_dictionary(
keys.len(),
&values,
)
.unwrap();
for key in keys {
if let Some(v) = key {
builder.append(v).unwrap();
} else {
builder.append_null()
}
}
builder.finish().into_data()
}
#[test]
fn test_dictionary() {
// (a, b, c), (0, 1, 0, 2) => (a, b, a, c)
let array = create_dictionary_array(
&["a", "b", "c"],
&[Some("a"), Some("b"), None, Some("c")],
);
let arrays = vec![&array];
let mut mutable = MutableArrayData::new(arrays, false, 0);
mutable.extend(0, 1, 3);
let result = mutable.freeze();
let result = DictionaryArray::from(result);
let expected = Int16Array::from(vec![Some(1), None]);
assert_eq!(result.keys(), &expected);
}