vortex-array 0.23.0

Vortex in memory columnar data format
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

use enum_iterator::all;
use itertools::Itertools;
use vortex_error::{vortex_panic, VortexExpect as _};
use vortex_scalar::ScalarValue;

use crate::data::InnerArray;
use crate::stats::{Stat, Statistics, StatsSet};
use crate::Array;

impl Statistics for Array {
    fn get(&self, stat: Stat) -> Option<ScalarValue> {
        match &self.0 {
            InnerArray::Owned(o) => o
                .stats_set
                .read()
                .unwrap_or_else(|_| {
                    vortex_panic!(
                        "Failed to acquire read lock on stats map while getting {}",
                        stat
                    )
                })
                .get(stat)
                .cloned(),
            InnerArray::Viewed(v) => match stat {
                Stat::Max => {
                    let max = v.flatbuffer().stats()?.max();
                    max.and_then(|v| ScalarValue::try_from(v).ok())
                }
                Stat::Min => {
                    let min = v.flatbuffer().stats()?.min();
                    min.and_then(|v| ScalarValue::try_from(v).ok())
                }
                Stat::IsConstant => v.flatbuffer().stats()?.is_constant().map(bool::into),
                Stat::IsSorted => v.flatbuffer().stats()?.is_sorted().map(bool::into),
                Stat::IsStrictSorted => v.flatbuffer().stats()?.is_strict_sorted().map(bool::into),
                Stat::RunCount => v.flatbuffer().stats()?.run_count().map(u64::into),
                Stat::TrueCount => v.flatbuffer().stats()?.true_count().map(u64::into),
                Stat::NullCount => v.flatbuffer().stats()?.null_count().map(u64::into),
                Stat::BitWidthFreq => v
                    .flatbuffer()
                    .stats()?
                    .bit_width_freq()
                    .map(|v| v.iter().collect_vec())
                    .map(ScalarValue::from),
                Stat::TrailingZeroFreq => v
                    .flatbuffer()
                    .stats()?
                    .trailing_zero_freq()
                    .map(|v| v.iter().collect_vec())
                    .map(ScalarValue::from),
                Stat::UncompressedSizeInBytes => v
                    .flatbuffer()
                    .stats()?
                    .uncompressed_size_in_bytes()
                    .map(u64::into),
            },
        }
    }

    fn to_set(&self) -> StatsSet {
        match &self.0 {
            InnerArray::Owned(o) => o
                .stats_set
                .read()
                .unwrap_or_else(|_| vortex_panic!("Failed to acquire read lock on stats map"))
                .clone(),
            InnerArray::Viewed(_) => StatsSet::from_iter(
                all::<Stat>().filter_map(|stat| self.get(stat).map(|v| (stat, v))),
            ),
        }
    }

    fn set(&self, stat: Stat, value: ScalarValue) {
        match &self.0 {
            InnerArray::Owned(o) => o
                .stats_set
                .write()
                .unwrap_or_else(|_| {
                    vortex_panic!(
                        "Failed to acquire write lock on stats map while setting {} to {}",
                        stat,
                        value
                    )
                })
                .set(stat, value),
            InnerArray::Viewed(_) => {
                // We cannot modify stats on a view
            }
        }
    }

    fn clear(&self, stat: Stat) {
        match &self.0 {
            InnerArray::Owned(o) => {
                o.stats_set
                    .write()
                    .unwrap_or_else(|_| vortex_panic!("Failed to acquire write lock on stats map"))
                    .clear(stat);
            }
            InnerArray::Viewed(_) => {
                // We cannot modify stats on a view
            }
        }
    }

    fn compute(&self, stat: Stat) -> Option<ScalarValue> {
        if let Some(s) = self.get(stat) {
            return Some(s);
        }
        let s = self
            .vtable()
            .compute_statistics(self, stat)
            .vortex_expect("compute_statistics must not fail")
            .get(stat)
            .cloned();

        if let Some(s) = &s {
            self.set(stat, s.clone());
        }

        s
    }

    fn retain_only(&self, stats: &[Stat]) {
        match &self.0 {
            InnerArray::Owned(o) => {
                o.stats_set
                    .write()
                    .unwrap_or_else(|_| vortex_panic!("Failed to acquire write lock on stats map"))
                    .retain_only(stats);
            }
            InnerArray::Viewed(_) => {
                // We cannot modify stats on a view
            }
        }
    }
}