mz_repr/
timestamp.rs

1// Copyright Materialize, Inc. and contributors. All rights reserved.
2//
3// Use of this software is governed by the Business Source License
4// included in the LICENSE file.
5//
6// As of the Change Date specified in that file, in accordance with
7// the Business Source License, use of this software will be governed
8// by the Apache License, Version 2.0.
9
10use std::convert::TryFrom;
11use std::num::TryFromIntError;
12use std::time::Duration;
13
14use dec::TryFromDecimalError;
15use mz_proto::{RustType, TryFromProtoError};
16use mz_timely_util::temporal::BucketTimestamp;
17#[cfg(any(test, feature = "proptest"))]
18use proptest_derive::Arbitrary;
19use serde::{Deserialize, Serialize, Serializer};
20
21use chrono::{DateTime, Utc};
22
23use crate::adt::numeric::Numeric;
24use crate::adt::timestamp::CheckedTimestamp;
25use crate::refresh_schedule::RefreshSchedule;
26use crate::strconv::{ParseError, parse_timestamptz, parse_timestamptz_legacy};
27
28include!(concat!(env!("OUT_DIR"), "/mz_repr.timestamp.rs"));
29
30/// System-wide timestamp type.
31#[derive(
32    Clone,
33    // TODO: De-implement Copy, which is widely used.
34    Copy,
35    PartialEq,
36    Eq,
37    PartialOrd,
38    Ord,
39    Hash,
40    Default,
41    bytemuck::AnyBitPattern,
42    bytemuck::NoUninit,
43)]
44#[cfg_attr(any(test, feature = "proptest"), derive(Arbitrary))]
45#[repr(transparent)]
46pub struct Timestamp {
47    /// note no `pub`.
48    internal: u64,
49}
50
51impl PartialEq<&Timestamp> for Timestamp {
52    fn eq(&self, other: &&Timestamp) -> bool {
53        self.eq(*other)
54    }
55}
56
57impl PartialEq<Timestamp> for &Timestamp {
58    fn eq(&self, other: &Timestamp) -> bool {
59        self.internal.eq(&other.internal)
60    }
61}
62
63impl RustType<ProtoTimestamp> for Timestamp {
64    fn into_proto(&self) -> ProtoTimestamp {
65        ProtoTimestamp {
66            internal: self.into(),
67        }
68    }
69
70    fn from_proto(proto: ProtoTimestamp) -> Result<Self, TryFromProtoError> {
71        Ok(Timestamp::new(proto.internal))
72    }
73}
74
75mod columnar_timestamp {
76    use crate::Timestamp;
77    use columnar::Columnar;
78    use mz_ore::cast::CastFrom;
79    use std::ops::Range;
80
81    /// A newtype wrapper for a vector of `Timestamp` values.
82    #[derive(Clone, Copy, Default, Debug)]
83    pub struct Timestamps<T>(T);
84    impl<D, T: columnar::Push<D>> columnar::Push<D> for Timestamps<T> {
85        #[inline(always)]
86        fn push(&mut self, item: D) {
87            self.0.push(item)
88        }
89    }
90    impl<T: columnar::Clear> columnar::Clear for Timestamps<T> {
91        #[inline(always)]
92        fn clear(&mut self) {
93            self.0.clear()
94        }
95    }
96    impl<T: columnar::Len> columnar::Len for Timestamps<T> {
97        #[inline(always)]
98        fn len(&self) -> usize {
99            self.0.len()
100        }
101    }
102    impl<'a> columnar::Index for Timestamps<&'a [Timestamp]> {
103        type Ref = Timestamp;
104
105        #[inline(always)]
106        fn get(&self, index: usize) -> Self::Ref {
107            self.0[index]
108        }
109    }
110
111    impl Columnar for Timestamp {
112        #[inline(always)]
113        fn into_owned<'a>(other: columnar::Ref<'a, Self>) -> Self {
114            other
115        }
116        type Container = Timestamps<Vec<Timestamp>>;
117        #[inline(always)]
118        fn reborrow<'b, 'a: 'b>(thing: columnar::Ref<'a, Self>) -> columnar::Ref<'b, Self>
119        where
120            Self: 'a,
121        {
122            thing
123        }
124    }
125
126    impl columnar::Borrow for Timestamps<Vec<Timestamp>> {
127        type Ref<'a> = Timestamp;
128        type Borrowed<'a>
129            = Timestamps<&'a [Timestamp]>
130        where
131            Self: 'a;
132        #[inline(always)]
133        fn borrow<'a>(&'a self) -> Self::Borrowed<'a> {
134            Timestamps(self.0.as_slice())
135        }
136        #[inline(always)]
137        fn reborrow<'b, 'a: 'b>(item: Self::Borrowed<'a>) -> Self::Borrowed<'b>
138        where
139            Self: 'a,
140        {
141            Timestamps(item.0)
142        }
143
144        #[inline(always)]
145        fn reborrow_ref<'b, 'a: 'b>(item: Self::Ref<'a>) -> Self::Ref<'b>
146        where
147            Self: 'a,
148        {
149            item
150        }
151    }
152
153    impl columnar::Container for Timestamps<Vec<Timestamp>> {
154        #[inline(always)]
155        fn extend_from_self(&mut self, other: Self::Borrowed<'_>, range: Range<usize>) {
156            self.0.extend_from_self(other.0, range)
157        }
158        #[inline(always)]
159        fn reserve_for<'a, I>(&mut self, selves: I)
160        where
161            Self: 'a,
162            I: Iterator<Item = Self::Borrowed<'a>> + Clone,
163        {
164            self.0.reserve_for(selves.map(|s| s.0));
165        }
166    }
167
168    impl<'a> columnar::AsBytes<'a> for Timestamps<&'a [Timestamp]> {
169        const SLICE_COUNT: usize = 1;
170        #[inline(always)]
171        fn get_byte_slice(&self, index: usize) -> (u64, &'a [u8]) {
172            debug_assert!(index < Self::SLICE_COUNT);
173            (
174                u64::cast_from(align_of::<Timestamp>()),
175                bytemuck::cast_slice(self.0),
176            )
177        }
178        #[inline(always)]
179        fn as_bytes(&self) -> impl Iterator<Item = (u64, &'a [u8])> {
180            std::iter::once((
181                u64::cast_from(align_of::<Timestamp>()),
182                bytemuck::cast_slice(self.0),
183            ))
184        }
185    }
186    impl<'a> columnar::FromBytes<'a> for Timestamps<&'a [Timestamp]> {
187        const SLICE_COUNT: usize = 1;
188        #[inline(always)]
189        fn from_bytes(bytes: &mut impl Iterator<Item = &'a [u8]>) -> Self {
190            Timestamps(bytemuck::cast_slice(
191                bytes.next().expect("Iterator exhausted prematurely"),
192            ))
193        }
194    }
195}
196
197impl BucketTimestamp for Timestamp {
198    fn advance_by_power_of_two(&self, exponent: u32) -> Option<Self> {
199        let rhs = 1_u64.checked_shl(exponent)?;
200        Some(self.internal.checked_add(rhs)?.into())
201    }
202}
203
204pub trait TimestampManipulation:
205    timely::progress::Timestamp
206    + timely::order::TotalOrder
207    + differential_dataflow::lattice::Lattice
208    + std::fmt::Debug
209    + mz_persist_types::StepForward
210    + Sync
211{
212    /// Advance a timestamp by the least amount possible such that
213    /// `ts.less_than(ts.step_forward())` is true. Panic if unable to do so.
214    fn step_forward(&self) -> Self;
215
216    /// Advance a timestamp forward by the given `amount`. Panic if unable to do so.
217    fn step_forward_by(&self, amount: &Self) -> Self;
218
219    /// Advance a timestamp forward by the given `amount`. Return `None` if unable to do so.
220    fn try_step_forward_by(&self, amount: &Self) -> Option<Self>;
221
222    /// Advance a timestamp by the least amount possible such that `ts.less_than(ts.step_forward())`
223    /// is true. Return `None` if unable to do so.
224    fn try_step_forward(&self) -> Option<Self>;
225
226    /// Retreat a timestamp by the least amount possible such that
227    /// `ts.step_back().unwrap().less_than(ts)` is true. Return `None` if unable,
228    /// which must only happen if the timestamp is `Timestamp::minimum()`.
229    fn step_back(&self) -> Option<Self>;
230
231    /// Return the maximum value for this timestamp.
232    fn maximum() -> Self;
233
234    /// Rounds up the timestamp to the time of the next refresh according to the given schedule.
235    /// Returns None if there is no next refresh.
236    fn round_up(&self, schedule: &RefreshSchedule) -> Option<Self>;
237
238    /// Rounds down `timestamp - 1` to the time of the previous refresh according to the given
239    /// schedule.
240    /// Returns None if there is no previous refresh.
241    fn round_down_minus_1(&self, schedule: &RefreshSchedule) -> Option<Self>;
242}
243
244impl TimestampManipulation for Timestamp {
245    fn step_forward(&self) -> Self {
246        self.step_forward()
247    }
248
249    fn step_forward_by(&self, amount: &Self) -> Self {
250        self.step_forward_by(amount)
251    }
252
253    fn try_step_forward(&self) -> Option<Self> {
254        self.try_step_forward()
255    }
256
257    fn try_step_forward_by(&self, amount: &Self) -> Option<Self> {
258        self.try_step_forward_by(amount)
259    }
260
261    fn step_back(&self) -> Option<Self> {
262        self.step_back()
263    }
264
265    fn maximum() -> Self {
266        Self::MAX
267    }
268
269    fn round_up(&self, schedule: &RefreshSchedule) -> Option<Self> {
270        schedule.round_up_timestamp(*self)
271    }
272
273    fn round_down_minus_1(&self, schedule: &RefreshSchedule) -> Option<Self> {
274        schedule.round_down_timestamp_m1(*self)
275    }
276}
277
278impl mz_persist_types::StepForward for Timestamp {
279    fn step_forward(&self) -> Self {
280        self.step_forward()
281    }
282}
283
284impl Timestamp {
285    pub const MAX: Self = Self { internal: u64::MAX };
286    pub const MIN: Self = Self { internal: u64::MIN };
287
288    pub const fn new(timestamp: u64) -> Self {
289        Self {
290            internal: timestamp,
291        }
292    }
293
294    pub fn to_bytes(&self) -> [u8; 8] {
295        self.internal.to_le_bytes()
296    }
297
298    pub fn from_bytes(bytes: [u8; 8]) -> Self {
299        Self {
300            internal: u64::from_le_bytes(bytes),
301        }
302    }
303
304    pub fn saturating_sub<I: Into<Self>>(self, rhs: I) -> Self {
305        Self {
306            internal: self.internal.saturating_sub(rhs.into().internal),
307        }
308    }
309
310    pub fn saturating_add<I: Into<Self>>(self, rhs: I) -> Self {
311        Self {
312            internal: self.internal.saturating_add(rhs.into().internal),
313        }
314    }
315
316    pub fn saturating_mul<I: Into<Self>>(self, rhs: I) -> Self {
317        Self {
318            internal: self.internal.saturating_mul(rhs.into().internal),
319        }
320    }
321
322    pub fn checked_add<I: Into<Self>>(self, rhs: I) -> Option<Self> {
323        self.internal
324            .checked_add(rhs.into().internal)
325            .map(|internal| Self { internal })
326    }
327
328    pub fn checked_sub<I: Into<Self>>(self, rhs: I) -> Option<Self> {
329        self.internal
330            .checked_sub(rhs.into().internal)
331            .map(|internal| Self { internal })
332    }
333
334    /// Advance a timestamp by the least amount possible such that
335    /// `ts.less_than(ts.step_forward())` is true. Panic if unable to do so.
336    pub fn step_forward(&self) -> Self {
337        match self.checked_add(1) {
338            Some(ts) => ts,
339            None => panic!("could not step forward"),
340        }
341    }
342
343    /// Advance a timestamp forward by the given `amount`. Panic if unable to do so.
344    pub fn step_forward_by(&self, amount: &Self) -> Self {
345        match self.checked_add(*amount) {
346            Some(ts) => ts,
347            None => panic!("could not step {self} forward by {amount}"),
348        }
349    }
350
351    /// Advance a timestamp by the least amount possible such that `ts.less_than(ts.step_forward())`
352    /// is true. Return `None` if unable to do so.
353    pub fn try_step_forward(&self) -> Option<Self> {
354        self.checked_add(1)
355    }
356
357    /// Advance a timestamp forward by the given `amount`. Return `None` if unable to do so.
358    pub fn try_step_forward_by(&self, amount: &Self) -> Option<Self> {
359        self.checked_add(*amount)
360    }
361
362    /// Retreat a timestamp by the least amount possible such that
363    /// `ts.step_back().unwrap().less_than(ts)` is true. Return `None` if unable,
364    /// which must only happen if the timestamp is `Timestamp::minimum()`.
365    pub fn step_back(&self) -> Option<Self> {
366        self.checked_sub(1)
367    }
368}
369
370impl From<u64> for Timestamp {
371    fn from(internal: u64) -> Self {
372        Self { internal }
373    }
374}
375
376impl From<Timestamp> for u64 {
377    fn from(ts: Timestamp) -> Self {
378        ts.internal
379    }
380}
381
382impl From<Timestamp> for u128 {
383    fn from(ts: Timestamp) -> Self {
384        u128::from(ts.internal)
385    }
386}
387
388impl TryFrom<Timestamp> for i64 {
389    type Error = TryFromIntError;
390
391    fn try_from(value: Timestamp) -> Result<Self, Self::Error> {
392        value.internal.try_into()
393    }
394}
395
396impl From<&Timestamp> for u64 {
397    fn from(ts: &Timestamp) -> Self {
398        ts.internal
399    }
400}
401
402impl From<Timestamp> for Numeric {
403    fn from(ts: Timestamp) -> Self {
404        ts.internal.into()
405    }
406}
407
408impl From<Timestamp> for Duration {
409    fn from(ts: Timestamp) -> Self {
410        Duration::from_millis(ts.internal)
411    }
412}
413
414impl std::ops::Rem<Timestamp> for Timestamp {
415    type Output = Timestamp;
416
417    fn rem(self, rhs: Timestamp) -> Self::Output {
418        Self {
419            internal: self.internal % rhs.internal,
420        }
421    }
422}
423
424impl Serialize for Timestamp {
425    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
426    where
427        S: Serializer,
428    {
429        self.internal.serialize(serializer)
430    }
431}
432
433impl<'de> Deserialize<'de> for Timestamp {
434    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
435    where
436        D: serde::Deserializer<'de>,
437    {
438        Ok(Self {
439            internal: u64::deserialize(deserializer)?,
440        })
441    }
442}
443
444impl timely::order::PartialOrder for Timestamp {
445    fn less_equal(&self, other: &Self) -> bool {
446        self.internal.less_equal(&other.internal)
447    }
448}
449
450impl timely::order::PartialOrder<&Timestamp> for Timestamp {
451    fn less_equal(&self, other: &&Self) -> bool {
452        self.internal.less_equal(&other.internal)
453    }
454}
455
456impl timely::order::PartialOrder<Timestamp> for &Timestamp {
457    fn less_equal(&self, other: &Timestamp) -> bool {
458        self.internal.less_equal(&other.internal)
459    }
460}
461
462impl timely::order::TotalOrder for Timestamp {}
463
464impl timely::progress::Timestamp for Timestamp {
465    type Summary = Timestamp;
466
467    fn minimum() -> Self {
468        Self::MIN
469    }
470}
471
472impl timely::progress::PathSummary<Timestamp> for Timestamp {
473    #[inline]
474    fn results_in(&self, src: &Timestamp) -> Option<Timestamp> {
475        self.internal
476            .checked_add(src.internal)
477            .map(|internal| Self { internal })
478    }
479    #[inline]
480    fn followed_by(&self, other: &Timestamp) -> Option<Timestamp> {
481        self.internal
482            .checked_add(other.internal)
483            .map(|internal| Self { internal })
484    }
485}
486
487impl timely::progress::timestamp::Refines<()> for Timestamp {
488    fn to_inner(_: ()) -> Timestamp {
489        Default::default()
490    }
491    fn to_outer(self) -> () {
492        ()
493    }
494    fn summarize(_: <Timestamp as timely::progress::timestamp::Timestamp>::Summary) -> () {
495        ()
496    }
497}
498
499impl differential_dataflow::lattice::Lattice for Timestamp {
500    #[inline]
501    fn join(&self, other: &Self) -> Self {
502        ::std::cmp::max(*self, *other)
503    }
504    #[inline]
505    fn meet(&self, other: &Self) -> Self {
506        ::std::cmp::min(*self, *other)
507    }
508}
509
510impl mz_persist_types::Codec64 for Timestamp {
511    fn codec_name() -> String {
512        u64::codec_name()
513    }
514
515    fn encode(&self) -> [u8; 8] {
516        self.internal.encode()
517    }
518
519    fn decode(buf: [u8; 8]) -> Self {
520        Self {
521            internal: u64::decode(buf),
522        }
523    }
524}
525
526impl std::fmt::Display for Timestamp {
527    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
528        std::fmt::Display::fmt(&self.internal, f)
529    }
530}
531
532impl std::fmt::Debug for Timestamp {
533    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
534        std::fmt::Debug::fmt(&self.internal, f)
535    }
536}
537
538impl std::str::FromStr for Timestamp {
539    type Err = String;
540
541    fn from_str(s: &str) -> Result<Self, Self::Err> {
542        Self::parse_with(s, parse_timestamptz)
543    }
544}
545
546impl Timestamp {
547    /// Like the [`std::str::FromStr`] impl, but the timestamp fallback uses
548    /// the frozen legacy date parsing. Solely for the storage source cast
549    /// `CastStringToMzTimestamp` (see the stability contract in
550    /// `mz_storage_types::sources::casts`).
551    pub fn from_str_legacy(s: &str) -> Result<Self, String> {
552        Self::parse_with(s, parse_timestamptz_legacy)
553    }
554
555    fn parse_with(
556        s: &str,
557        parse_fallback: fn(&str) -> Result<CheckedTimestamp<DateTime<Utc>>, ParseError>,
558    ) -> Result<Self, String> {
559        Ok(Self {
560            internal: s
561                .parse::<u64>()
562                .map_err(|_| "could not parse as number of milliseconds since epoch".to_string())
563                .or_else(|err_num_of_millis| {
564                    parse_fallback(s)
565                        .map_err(|parse_error| {
566                            format!(
567                                "{}; could not parse as date and time: {}",
568                                err_num_of_millis, parse_error
569                            )
570                        })?
571                        .timestamp_millis()
572                        .try_into()
573                        .map_err(|_| "out of range for mz_timestamp".to_string())
574                })
575                .map_err(|e: String| format!("could not parse mz_timestamp: {}", e))?,
576        })
577    }
578}
579
580impl TryFrom<Duration> for Timestamp {
581    type Error = TryFromIntError;
582
583    fn try_from(value: Duration) -> Result<Self, Self::Error> {
584        Ok(Self {
585            internal: value.as_millis().try_into()?,
586        })
587    }
588}
589
590impl TryFrom<u128> for Timestamp {
591    type Error = TryFromIntError;
592
593    fn try_from(value: u128) -> Result<Self, Self::Error> {
594        Ok(Self {
595            internal: value.try_into()?,
596        })
597    }
598}
599
600impl TryFrom<i64> for Timestamp {
601    type Error = TryFromIntError;
602
603    fn try_from(value: i64) -> Result<Self, Self::Error> {
604        Ok(Self {
605            internal: value.try_into()?,
606        })
607    }
608}
609
610impl TryFrom<Numeric> for Timestamp {
611    type Error = TryFromDecimalError;
612
613    fn try_from(value: Numeric) -> Result<Self, Self::Error> {
614        Ok(Self {
615            internal: value.try_into()?,
616        })
617    }
618}
619
620impl columnation::Columnation for Timestamp {
621    type InnerRegion = columnation::CopyRegion<Timestamp>;
622}
mz_repr/timestamp.rs

mz_repr/
timestamp.rs
