vortex-btrblocks 0.65.0

BtrBlocks style compressor
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

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

use vortex_array::ArrayRef;
use vortex_array::Canonical;
use vortex_array::IntoArray;
use vortex_array::arrays::DecimalArray;
use vortex_array::arrays::PrimitiveArray;
use vortex_array::arrays::decimal::narrowed_decimal;
use vortex_array::dtype::DecimalType;
use vortex_array::vtable::ValidityHelper;
use vortex_decimal_byte_parts::DecimalBytePartsArray;
use vortex_error::VortexResult;

use crate::BtrBlocksCompressor;
use crate::CanonicalCompressor;
use crate::CompressorContext;
use crate::Excludes;

// TODO(joe): add support splitting i128/256 buffers into chunks primitive values for compression.
// 2 for i128 and 4 for i256
pub fn compress_decimal(
    compressor: &BtrBlocksCompressor,
    decimal: &DecimalArray,
) -> VortexResult<ArrayRef> {
    let decimal = narrowed_decimal(decimal.clone());
    let validity = decimal.validity();
    let prim = match decimal.values_type() {
        DecimalType::I8 => PrimitiveArray::new(decimal.buffer::<i8>(), validity.clone()),
        DecimalType::I16 => PrimitiveArray::new(decimal.buffer::<i16>(), validity.clone()),
        DecimalType::I32 => PrimitiveArray::new(decimal.buffer::<i32>(), validity.clone()),
        DecimalType::I64 => PrimitiveArray::new(decimal.buffer::<i64>(), validity.clone()),
        _ => return Ok(decimal.into_array()),
    };

    let compressed = compressor.compress_canonical(
        Canonical::Primitive(prim),
        CompressorContext::default(),
        Excludes::none(),
    )?;

    DecimalBytePartsArray::try_new(compressed, decimal.decimal_dtype()).map(|d| d.into_array())
}