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scalar.rs
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// 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.
//! This module provides ScalarValue, an enum that can be used for storage of single elements
use std::borrow::Borrow;
use std::cmp::{max, Ordering};
use std::collections::HashSet;
use std::convert::{Infallible, TryInto};
use std::ops::{Add, Sub};
use std::str::FromStr;
use std::{convert::TryFrom, fmt, iter::repeat, sync::Arc};
use crate::cast::{
as_decimal128_array, as_dictionary_array, as_fixed_size_binary_array,
as_fixed_size_list_array, as_list_array, as_struct_array,
};
use crate::delta::shift_months;
use crate::error::{DataFusionError, Result};
use arrow::{
array::*,
compute::kernels::cast::{cast, cast_with_options, CastOptions},
datatypes::{
ArrowDictionaryKeyType, ArrowNativeType, DataType, Field, Float32Type,
Float64Type, Int16Type, Int32Type, Int64Type, Int8Type, IntervalDayTimeType,
IntervalMonthDayNanoType, IntervalUnit, IntervalYearMonthType, TimeUnit,
TimestampMicrosecondType, TimestampMillisecondType, TimestampNanosecondType,
TimestampSecondType, UInt16Type, UInt32Type, UInt64Type, UInt8Type,
DECIMAL128_MAX_PRECISION,
},
};
use arrow_array::timezone::Tz;
use chrono::{DateTime, Datelike, Duration, NaiveDate, NaiveDateTime, TimeZone};
// Constants we use throughout this file:
const MILLISECS_IN_ONE_DAY: i64 = 86_400_000;
const NANOSECS_IN_ONE_DAY: i64 = 86_400_000_000_000;
const MILLISECS_IN_ONE_MONTH: i64 = 2_592_000_000; // assuming 30 days.
const NANOSECS_IN_ONE_MONTH: i128 = 2_592_000_000_000_000; // assuming 30 days.
/// Represents a dynamically typed, nullable single value.
/// This is the single-valued counter-part to arrow's [`Array`].
///
/// See [datatypes](https://arrow.apache.org/docs/python/api/datatypes.html) for
/// details on datatypes and the [format](https://github.com/apache/arrow/blob/master/format/Schema.fbs#L354-L375)
/// for the definitive reference.
#[derive(Clone)]
pub enum ScalarValue {
/// represents `DataType::Null` (castable to/from any other type)
Null,
/// true or false value
Boolean(Option<bool>),
/// 32bit float
Float32(Option<f32>),
/// 64bit float
Float64(Option<f64>),
/// 128bit decimal, using the i128 to represent the decimal, precision scale
Decimal128(Option<i128>, u8, i8),
/// signed 8bit int
Int8(Option<i8>),
/// signed 16bit int
Int16(Option<i16>),
/// signed 32bit int
Int32(Option<i32>),
/// signed 64bit int
Int64(Option<i64>),
/// unsigned 8bit int
UInt8(Option<u8>),
/// unsigned 16bit int
UInt16(Option<u16>),
/// unsigned 32bit int
UInt32(Option<u32>),
/// unsigned 64bit int
UInt64(Option<u64>),
/// utf-8 encoded string.
Utf8(Option<String>),
/// utf-8 encoded string representing a LargeString's arrow type.
LargeUtf8(Option<String>),
/// binary
Binary(Option<Vec<u8>>),
/// fixed size binary
FixedSizeBinary(i32, Option<Vec<u8>>),
/// large binary
LargeBinary(Option<Vec<u8>>),
/// list of nested ScalarValue
List(Option<Vec<ScalarValue>>, Box<Field>),
/// Date stored as a signed 32bit int days since UNIX epoch 1970-01-01
Date32(Option<i32>),
/// Date stored as a signed 64bit int milliseconds since UNIX epoch 1970-01-01
Date64(Option<i64>),
/// Time stored as a signed 32bit int as seconds since midnight
Time32Second(Option<i32>),
/// Time stored as a signed 32bit int as milliseconds since midnight
Time32Millisecond(Option<i32>),
/// Time stored as a signed 64bit int as microseconds since midnight
Time64Microsecond(Option<i64>),
/// Time stored as a signed 64bit int as nanoseconds since midnight
Time64Nanosecond(Option<i64>),
/// Timestamp Second
TimestampSecond(Option<i64>, Option<String>),
/// Timestamp Milliseconds
TimestampMillisecond(Option<i64>, Option<String>),
/// Timestamp Microseconds
TimestampMicrosecond(Option<i64>, Option<String>),
/// Timestamp Nanoseconds
TimestampNanosecond(Option<i64>, Option<String>),
/// Number of elapsed whole months
IntervalYearMonth(Option<i32>),
/// Number of elapsed days and milliseconds (no leap seconds)
/// stored as 2 contiguous 32-bit signed integers
IntervalDayTime(Option<i64>),
/// A triple of the number of elapsed months, days, and nanoseconds.
/// Months and days are encoded as 32-bit signed integers.
/// Nanoseconds is encoded as a 64-bit signed integer (no leap seconds).
IntervalMonthDayNano(Option<i128>),
/// struct of nested ScalarValue
Struct(Option<Vec<ScalarValue>>, Box<Vec<Field>>),
/// Dictionary type: index type and value
Dictionary(Box<DataType>, Box<ScalarValue>),
}
// manual implementation of `PartialEq`
impl PartialEq for ScalarValue {
fn eq(&self, other: &Self) -> bool {
use ScalarValue::*;
// This purposely doesn't have a catch-all "(_, _)" so that
// any newly added enum variant will require editing this list
// or else face a compile error
match (self, other) {
(Decimal128(v1, p1, s1), Decimal128(v2, p2, s2)) => {
v1.eq(v2) && p1.eq(p2) && s1.eq(s2)
}
(Decimal128(_, _, _), _) => false,
(Boolean(v1), Boolean(v2)) => v1.eq(v2),
(Boolean(_), _) => false,
(Float32(v1), Float32(v2)) => match (v1, v2) {
(Some(f1), Some(f2)) => f1.to_bits() == f2.to_bits(),
_ => v1.eq(v2),
},
(Float32(_), _) => false,
(Float64(v1), Float64(v2)) => match (v1, v2) {
(Some(f1), Some(f2)) => f1.to_bits() == f2.to_bits(),
_ => v1.eq(v2),
},
(Float64(_), _) => false,
(Int8(v1), Int8(v2)) => v1.eq(v2),
(Int8(_), _) => false,
(Int16(v1), Int16(v2)) => v1.eq(v2),
(Int16(_), _) => false,
(Int32(v1), Int32(v2)) => v1.eq(v2),
(Int32(_), _) => false,
(Int64(v1), Int64(v2)) => v1.eq(v2),
(Int64(_), _) => false,
(UInt8(v1), UInt8(v2)) => v1.eq(v2),
(UInt8(_), _) => false,
(UInt16(v1), UInt16(v2)) => v1.eq(v2),
(UInt16(_), _) => false,
(UInt32(v1), UInt32(v2)) => v1.eq(v2),
(UInt32(_), _) => false,
(UInt64(v1), UInt64(v2)) => v1.eq(v2),
(UInt64(_), _) => false,
(Utf8(v1), Utf8(v2)) => v1.eq(v2),
(Utf8(_), _) => false,
(LargeUtf8(v1), LargeUtf8(v2)) => v1.eq(v2),
(LargeUtf8(_), _) => false,
(Binary(v1), Binary(v2)) => v1.eq(v2),
(Binary(_), _) => false,
(FixedSizeBinary(_, v1), FixedSizeBinary(_, v2)) => v1.eq(v2),
(FixedSizeBinary(_, _), _) => false,
(LargeBinary(v1), LargeBinary(v2)) => v1.eq(v2),
(LargeBinary(_), _) => false,
(List(v1, t1), List(v2, t2)) => v1.eq(v2) && t1.eq(t2),
(List(_, _), _) => false,
(Date32(v1), Date32(v2)) => v1.eq(v2),
(Date32(_), _) => false,
(Date64(v1), Date64(v2)) => v1.eq(v2),
(Date64(_), _) => false,
(Time32Second(v1), Time32Second(v2)) => v1.eq(v2),
(Time32Second(_), _) => false,
(Time32Millisecond(v1), Time32Millisecond(v2)) => v1.eq(v2),
(Time32Millisecond(_), _) => false,
(Time64Microsecond(v1), Time64Microsecond(v2)) => v1.eq(v2),
(Time64Microsecond(_), _) => false,
(Time64Nanosecond(v1), Time64Nanosecond(v2)) => v1.eq(v2),
(Time64Nanosecond(_), _) => false,
(TimestampSecond(v1, _), TimestampSecond(v2, _)) => v1.eq(v2),
(TimestampSecond(_, _), _) => false,
(TimestampMillisecond(v1, _), TimestampMillisecond(v2, _)) => v1.eq(v2),
(TimestampMillisecond(_, _), _) => false,
(TimestampMicrosecond(v1, _), TimestampMicrosecond(v2, _)) => v1.eq(v2),
(TimestampMicrosecond(_, _), _) => false,
(TimestampNanosecond(v1, _), TimestampNanosecond(v2, _)) => v1.eq(v2),
(TimestampNanosecond(_, _), _) => false,
(IntervalYearMonth(v1), IntervalYearMonth(v2)) => v1.eq(v2),
(IntervalYearMonth(v1), IntervalDayTime(v2)) => {
ym_to_milli(v1).eq(&dt_to_milli(v2))
}
(IntervalYearMonth(v1), IntervalMonthDayNano(v2)) => {
ym_to_nano(v1).eq(&mdn_to_nano(v2))
}
(IntervalYearMonth(_), _) => false,
(IntervalDayTime(v1), IntervalDayTime(v2)) => v1.eq(v2),
(IntervalDayTime(v1), IntervalYearMonth(v2)) => {
dt_to_milli(v1).eq(&ym_to_milli(v2))
}
(IntervalDayTime(v1), IntervalMonthDayNano(v2)) => {
dt_to_nano(v1).eq(&mdn_to_nano(v2))
}
(IntervalDayTime(_), _) => false,
(IntervalMonthDayNano(v1), IntervalMonthDayNano(v2)) => v1.eq(v2),
(IntervalMonthDayNano(v1), IntervalYearMonth(v2)) => {
mdn_to_nano(v1).eq(&ym_to_nano(v2))
}
(IntervalMonthDayNano(v1), IntervalDayTime(v2)) => {
mdn_to_nano(v1).eq(&dt_to_nano(v2))
}
(IntervalMonthDayNano(_), _) => false,
(Struct(v1, t1), Struct(v2, t2)) => v1.eq(v2) && t1.eq(t2),
(Struct(_, _), _) => false,
(Dictionary(k1, v1), Dictionary(k2, v2)) => k1.eq(k2) && v1.eq(v2),
(Dictionary(_, _), _) => false,
(Null, Null) => true,
(Null, _) => false,
}
}
}
// manual implementation of `PartialOrd`
impl PartialOrd for ScalarValue {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
use ScalarValue::*;
// This purposely doesn't have a catch-all "(_, _)" so that
// any newly added enum variant will require editing this list
// or else face a compile error
match (self, other) {
(Decimal128(v1, p1, s1), Decimal128(v2, p2, s2)) => {
if p1.eq(p2) && s1.eq(s2) {
v1.partial_cmp(v2)
} else {
// Two decimal values can be compared if they have the same precision and scale.
None
}
}
(Decimal128(_, _, _), _) => None,
(Boolean(v1), Boolean(v2)) => v1.partial_cmp(v2),
(Boolean(_), _) => None,
(Float32(v1), Float32(v2)) => match (v1, v2) {
(Some(f1), Some(f2)) => Some(f1.total_cmp(f2)),
_ => v1.partial_cmp(v2),
},
(Float32(_), _) => None,
(Float64(v1), Float64(v2)) => match (v1, v2) {
(Some(f1), Some(f2)) => Some(f1.total_cmp(f2)),
_ => v1.partial_cmp(v2),
},
(Float64(_), _) => None,
(Int8(v1), Int8(v2)) => v1.partial_cmp(v2),
(Int8(_), _) => None,
(Int16(v1), Int16(v2)) => v1.partial_cmp(v2),
(Int16(_), _) => None,
(Int32(v1), Int32(v2)) => v1.partial_cmp(v2),
(Int32(_), _) => None,
(Int64(v1), Int64(v2)) => v1.partial_cmp(v2),
(Int64(_), _) => None,
(UInt8(v1), UInt8(v2)) => v1.partial_cmp(v2),
(UInt8(_), _) => None,
(UInt16(v1), UInt16(v2)) => v1.partial_cmp(v2),
(UInt16(_), _) => None,
(UInt32(v1), UInt32(v2)) => v1.partial_cmp(v2),
(UInt32(_), _) => None,
(UInt64(v1), UInt64(v2)) => v1.partial_cmp(v2),
(UInt64(_), _) => None,
(Utf8(v1), Utf8(v2)) => v1.partial_cmp(v2),
(Utf8(_), _) => None,
(LargeUtf8(v1), LargeUtf8(v2)) => v1.partial_cmp(v2),
(LargeUtf8(_), _) => None,
(Binary(v1), Binary(v2)) => v1.partial_cmp(v2),
(Binary(_), _) => None,
(FixedSizeBinary(_, v1), FixedSizeBinary(_, v2)) => v1.partial_cmp(v2),
(FixedSizeBinary(_, _), _) => None,
(LargeBinary(v1), LargeBinary(v2)) => v1.partial_cmp(v2),
(LargeBinary(_), _) => None,
(List(v1, t1), List(v2, t2)) => {
if t1.eq(t2) {
v1.partial_cmp(v2)
} else {
None
}
}
(List(_, _), _) => None,
(Date32(v1), Date32(v2)) => v1.partial_cmp(v2),
(Date32(_), _) => None,
(Date64(v1), Date64(v2)) => v1.partial_cmp(v2),
(Date64(_), _) => None,
(Time32Second(v1), Time32Second(v2)) => v1.partial_cmp(v2),
(Time32Second(_), _) => None,
(Time32Millisecond(v1), Time32Millisecond(v2)) => v1.partial_cmp(v2),
(Time32Millisecond(_), _) => None,
(Time64Microsecond(v1), Time64Microsecond(v2)) => v1.partial_cmp(v2),
(Time64Microsecond(_), _) => None,
(Time64Nanosecond(v1), Time64Nanosecond(v2)) => v1.partial_cmp(v2),
(Time64Nanosecond(_), _) => None,
(TimestampSecond(v1, _), TimestampSecond(v2, _)) => v1.partial_cmp(v2),
(TimestampSecond(_, _), _) => None,
(TimestampMillisecond(v1, _), TimestampMillisecond(v2, _)) => {
v1.partial_cmp(v2)
}
(TimestampMillisecond(_, _), _) => None,
(TimestampMicrosecond(v1, _), TimestampMicrosecond(v2, _)) => {
v1.partial_cmp(v2)
}
(TimestampMicrosecond(_, _), _) => None,
(TimestampNanosecond(v1, _), TimestampNanosecond(v2, _)) => {
v1.partial_cmp(v2)
}
(TimestampNanosecond(_, _), _) => None,
(IntervalYearMonth(v1), IntervalYearMonth(v2)) => v1.partial_cmp(v2),
(IntervalYearMonth(v1), IntervalDayTime(v2)) => {
ym_to_milli(v1).partial_cmp(&dt_to_milli(v2))
}
(IntervalYearMonth(v1), IntervalMonthDayNano(v2)) => {
ym_to_nano(v1).partial_cmp(&mdn_to_nano(v2))
}
(IntervalYearMonth(_), _) => None,
(IntervalDayTime(v1), IntervalDayTime(v2)) => v1.partial_cmp(v2),
(IntervalDayTime(v1), IntervalYearMonth(v2)) => {
dt_to_milli(v1).partial_cmp(&ym_to_milli(v2))
}
(IntervalDayTime(v1), IntervalMonthDayNano(v2)) => {
dt_to_nano(v1).partial_cmp(&mdn_to_nano(v2))
}
(IntervalDayTime(_), _) => None,
(IntervalMonthDayNano(v1), IntervalMonthDayNano(v2)) => v1.partial_cmp(v2),
(IntervalMonthDayNano(v1), IntervalYearMonth(v2)) => {
mdn_to_nano(v1).partial_cmp(&ym_to_nano(v2))
}
(IntervalMonthDayNano(v1), IntervalDayTime(v2)) => {
mdn_to_nano(v1).partial_cmp(&dt_to_nano(v2))
}
(IntervalMonthDayNano(_), _) => None,
(Struct(v1, t1), Struct(v2, t2)) => {
if t1.eq(t2) {
v1.partial_cmp(v2)
} else {
None
}
}
(Struct(_, _), _) => None,
(Dictionary(k1, v1), Dictionary(k2, v2)) => {
// Don't compare if the key types don't match (it is effectively a different datatype)
if k1 == k2 {
v1.partial_cmp(v2)
} else {
None
}
}
(Dictionary(_, _), _) => None,
(Null, Null) => Some(Ordering::Equal),
(Null, _) => None,
}
}
}
/// This function computes the duration (in milliseconds) of the given
/// year-month-interval.
#[inline]
fn ym_to_milli(val: &Option<i32>) -> Option<i64> {
val.map(|value| (value as i64) * MILLISECS_IN_ONE_MONTH)
}
/// This function computes the duration (in nanoseconds) of the given
/// year-month-interval.
#[inline]
fn ym_to_nano(val: &Option<i32>) -> Option<i128> {
val.map(|value| (value as i128) * NANOSECS_IN_ONE_MONTH)
}
/// This function computes the duration (in milliseconds) of the given
/// daytime-interval.
#[inline]
fn dt_to_milli(val: &Option<i64>) -> Option<i64> {
val.map(|val| {
let (days, millis) = IntervalDayTimeType::to_parts(val);
(days as i64) * MILLISECS_IN_ONE_DAY + (millis as i64)
})
}
/// This function computes the duration (in nanoseconds) of the given
/// daytime-interval.
#[inline]
fn dt_to_nano(val: &Option<i64>) -> Option<i128> {
val.map(|val| {
let (days, millis) = IntervalDayTimeType::to_parts(val);
(days as i128) * (NANOSECS_IN_ONE_DAY as i128) + (millis as i128) * 1_000_000
})
}
/// This function computes the duration (in nanoseconds) of the given
/// month-day-nano-interval. Assumes a month is 30 days long.
#[inline]
fn mdn_to_nano(val: &Option<i128>) -> Option<i128> {
val.map(|val| {
let (months, days, nanos) = IntervalMonthDayNanoType::to_parts(val);
(months as i128) * NANOSECS_IN_ONE_MONTH
+ (days as i128) * (NANOSECS_IN_ONE_DAY as i128)
+ (nanos as i128)
})
}
impl Eq for ScalarValue {}
// TODO implement this in arrow-rs with simd
// https://github.com/apache/arrow-rs/issues/1010
macro_rules! decimal_op {
($LHS:expr, $RHS:expr, $PRECISION:expr, $LHS_SCALE:expr, $RHS_SCALE:expr, $OPERATION:tt) => {{
let (difference, side) = if $LHS_SCALE > $RHS_SCALE {
($LHS_SCALE - $RHS_SCALE, true)
} else {
($RHS_SCALE - $LHS_SCALE, false)
};
let scale = max($LHS_SCALE, $RHS_SCALE);
Ok(match ($LHS, $RHS, difference) {
(None, None, _) => ScalarValue::Decimal128(None, $PRECISION, scale),
(lhs, None, 0) => ScalarValue::Decimal128(*lhs, $PRECISION, scale),
(Some(lhs_value), None, _) => {
let mut new_value = *lhs_value;
if !side {
new_value *= 10_i128.pow(difference as u32)
}
ScalarValue::Decimal128(Some(new_value), $PRECISION, scale)
}
(None, Some(rhs_value), 0) => {
let value = decimal_right!(*rhs_value, $OPERATION);
ScalarValue::Decimal128(Some(value), $PRECISION, scale)
}
(None, Some(rhs_value), _) => {
let mut new_value = decimal_right!(*rhs_value, $OPERATION);
if side {
new_value *= 10_i128.pow(difference as u32)
};
ScalarValue::Decimal128(Some(new_value), $PRECISION, scale)
}
(Some(lhs_value), Some(rhs_value), 0) => {
decimal_binary_op!(lhs_value, rhs_value, $OPERATION, $PRECISION, scale)
}
(Some(lhs_value), Some(rhs_value), _) => {
let (left_arg, right_arg) = if side {
(*lhs_value, rhs_value * 10_i128.pow(difference as u32))
} else {
(lhs_value * 10_i128.pow(difference as u32), *rhs_value)
};
decimal_binary_op!(left_arg, right_arg, $OPERATION, $PRECISION, scale)
}
})
}};
}
macro_rules! decimal_binary_op {
($LHS:expr, $RHS:expr, $OPERATION:tt, $PRECISION:expr, $SCALE:expr) => {
// TODO: This simple implementation loses precision for calculations like
// multiplication and division. Improve this implementation for such
// operations.
ScalarValue::Decimal128(Some($LHS $OPERATION $RHS), $PRECISION, $SCALE)
};
}
macro_rules! decimal_right {
($TERM:expr, +) => {
$TERM
};
($TERM:expr, *) => {
$TERM
};
($TERM:expr, -) => {
-$TERM
};
($TERM:expr, /) => {
Err(DataFusionError::NotImplemented(format!(
"Decimal reciprocation not yet supported",
)))
};
}
// Returns the result of applying operation to two scalar values.
macro_rules! primitive_op {
($LEFT:expr, $RIGHT:expr, $SCALAR:ident, $OPERATION:tt) => {
match ($LEFT, $RIGHT) {
(lhs, None) => Ok(ScalarValue::$SCALAR(*lhs)),
#[allow(unused_variables)]
(None, Some(b)) => { primitive_right!(*b, $OPERATION, $SCALAR) },
(Some(a), Some(b)) => Ok(ScalarValue::$SCALAR(Some(*a $OPERATION *b))),
}
};
}
macro_rules! primitive_right {
($TERM:expr, +, $SCALAR:ident) => {
Ok(ScalarValue::$SCALAR(Some($TERM)))
};
($TERM:expr, *, $SCALAR:ident) => {
Ok(ScalarValue::$SCALAR(Some($TERM)))
};
($TERM:expr, -, UInt64) => {
unsigned_subtraction_error!("UInt64")
};
($TERM:expr, -, UInt32) => {
unsigned_subtraction_error!("UInt32")
};
($TERM:expr, -, UInt16) => {
unsigned_subtraction_error!("UInt16")
};
($TERM:expr, -, UInt8) => {
unsigned_subtraction_error!("UInt8")
};
($TERM:expr, -, $SCALAR:ident) => {
Ok(ScalarValue::$SCALAR(Some(-$TERM)))
};
($TERM:expr, /, Float64) => {
Ok(ScalarValue::$SCALAR(Some($TERM.recip())))
};
($TERM:expr, /, Float32) => {
Ok(ScalarValue::$SCALAR(Some($TERM.recip())))
};
($TERM:expr, /, $SCALAR:ident) => {
Err(DataFusionError::Internal(format!(
"Can not divide an uninitialized value to a non-floating point value",
)))
};
}
macro_rules! unsigned_subtraction_error {
($SCALAR:expr) => {{
let msg = format!(
"Can not subtract a {} value from an uninitialized value",
$SCALAR
);
Err(DataFusionError::Internal(msg))
}};
}
macro_rules! impl_op {
($LHS:expr, $RHS:expr, +) => {
impl_op_arithmetic!($LHS, $RHS, +)
};
($LHS:expr, $RHS:expr, -) => {
match ($LHS, $RHS) {
(
ScalarValue::TimestampSecond(Some(ts_lhs), tz_lhs),
ScalarValue::TimestampSecond(Some(ts_rhs), tz_rhs),
) => {
let err = || {
DataFusionError::Execution(
"Overflow while converting seconds to milliseconds".to_string(),
)
};
ts_sub_to_interval(
ts_lhs.checked_mul(1_000).ok_or_else(err)?,
ts_rhs.checked_mul(1_000).ok_or_else(err)?,
&tz_lhs,
&tz_rhs,
IntervalMode::Milli,
)
},
(
ScalarValue::TimestampMillisecond(Some(ts_lhs), tz_lhs),
ScalarValue::TimestampMillisecond(Some(ts_rhs), tz_rhs),
) => ts_sub_to_interval(
*ts_lhs,
*ts_rhs,
tz_lhs,
tz_rhs,
IntervalMode::Milli,
),
(
ScalarValue::TimestampMicrosecond(Some(ts_lhs), tz_lhs),
ScalarValue::TimestampMicrosecond(Some(ts_rhs), tz_rhs),
) => {
let err = || {
DataFusionError::Execution(
"Overflow while converting microseconds to nanoseconds".to_string(),
)
};
ts_sub_to_interval(
ts_lhs.checked_mul(1_000).ok_or_else(err)?,
ts_rhs.checked_mul(1_000).ok_or_else(err)?,
tz_lhs,
tz_rhs,
IntervalMode::Nano,
)
},
(
ScalarValue::TimestampNanosecond(Some(ts_lhs), tz_lhs),
ScalarValue::TimestampNanosecond(Some(ts_rhs), tz_rhs),
) => ts_sub_to_interval(
*ts_lhs,
*ts_rhs,
tz_lhs,
tz_rhs,
IntervalMode::Nano,
),
_ => impl_op_arithmetic!($LHS, $RHS, -)
}
};
}
macro_rules! impl_op_arithmetic {
($LHS:expr, $RHS:expr, $OPERATION:tt) => {
match ($LHS, $RHS) {
// Binary operations on arguments with the same type:
(
ScalarValue::Decimal128(v1, p1, s1),
ScalarValue::Decimal128(v2, p2, s2),
) => {
decimal_op!(v1, v2, *p1.max(p2), *s1, *s2, $OPERATION)
}
(ScalarValue::Float64(lhs), ScalarValue::Float64(rhs)) => {
primitive_op!(lhs, rhs, Float64, $OPERATION)
}
(ScalarValue::Float32(lhs), ScalarValue::Float32(rhs)) => {
primitive_op!(lhs, rhs, Float32, $OPERATION)
}
(ScalarValue::UInt64(lhs), ScalarValue::UInt64(rhs)) => {
primitive_op!(lhs, rhs, UInt64, $OPERATION)
}
(ScalarValue::Int64(lhs), ScalarValue::Int64(rhs)) => {
primitive_op!(lhs, rhs, Int64, $OPERATION)
}
(ScalarValue::UInt32(lhs), ScalarValue::UInt32(rhs)) => {
primitive_op!(lhs, rhs, UInt32, $OPERATION)
}
(ScalarValue::Int32(lhs), ScalarValue::Int32(rhs)) => {
primitive_op!(lhs, rhs, Int32, $OPERATION)
}
(ScalarValue::UInt16(lhs), ScalarValue::UInt16(rhs)) => {
primitive_op!(lhs, rhs, UInt16, $OPERATION)
}
(ScalarValue::Int16(lhs), ScalarValue::Int16(rhs)) => {
primitive_op!(lhs, rhs, Int16, $OPERATION)
}
(ScalarValue::UInt8(lhs), ScalarValue::UInt8(rhs)) => {
primitive_op!(lhs, rhs, UInt8, $OPERATION)
}
(ScalarValue::Int8(lhs), ScalarValue::Int8(rhs)) => {
primitive_op!(lhs, rhs, Int8, $OPERATION)
}
(
ScalarValue::IntervalYearMonth(Some(lhs)),
ScalarValue::IntervalYearMonth(Some(rhs)),
) => Ok(ScalarValue::new_interval_ym(
0,
lhs + rhs * get_sign!($OPERATION),
)),
(
ScalarValue::IntervalDayTime(Some(lhs)),
ScalarValue::IntervalDayTime(Some(rhs)),
) => {
let sign = get_sign!($OPERATION);
let (lhs_days, lhs_millis) = IntervalDayTimeType::to_parts(*lhs);
let (rhs_days, rhs_millis) = IntervalDayTimeType::to_parts(*rhs);
Ok(ScalarValue::new_interval_dt(
lhs_days + rhs_days * sign,
lhs_millis + rhs_millis * sign,
))
}
(
ScalarValue::IntervalMonthDayNano(Some(lhs)),
ScalarValue::IntervalMonthDayNano(Some(rhs)),
) => {
let sign = get_sign!($OPERATION);
let (lhs_months, lhs_days, lhs_nanos) =
IntervalMonthDayNanoType::to_parts(*lhs);
let (rhs_months, rhs_days, rhs_nanos) =
IntervalMonthDayNanoType::to_parts(*rhs);
Ok(ScalarValue::new_interval_mdn(
lhs_months + rhs_months * sign,
lhs_days + rhs_days * sign,
lhs_nanos + rhs_nanos * (sign as i64),
))
}
// Binary operations on arguments with different types:
(ScalarValue::Date32(Some(days)), _) => {
let value = date32_add(*days, $RHS, get_sign!($OPERATION))?;
Ok(ScalarValue::Date32(Some(value)))
}
(ScalarValue::Date64(Some(ms)), _) => {
let value = date64_add(*ms, $RHS, get_sign!($OPERATION))?;
Ok(ScalarValue::Date64(Some(value)))
}
(ScalarValue::TimestampSecond(Some(ts_s), zone), _) => {
let value = seconds_add(*ts_s, $RHS, get_sign!($OPERATION))?;
Ok(ScalarValue::TimestampSecond(Some(value), zone.clone()))
}
(_, ScalarValue::TimestampSecond(Some(ts_s), zone)) => {
let value = seconds_add(*ts_s, $LHS, get_sign!($OPERATION))?;
Ok(ScalarValue::TimestampSecond(Some(value), zone.clone()))
}
(ScalarValue::TimestampMillisecond(Some(ts_ms), zone), _) => {
let value = milliseconds_add(*ts_ms, $RHS, get_sign!($OPERATION))?;
Ok(ScalarValue::TimestampMillisecond(Some(value), zone.clone()))
}
(_, ScalarValue::TimestampMillisecond(Some(ts_ms), zone)) => {
let value = milliseconds_add(*ts_ms, $LHS, get_sign!($OPERATION))?;
Ok(ScalarValue::TimestampMillisecond(Some(value), zone.clone()))
}
(ScalarValue::TimestampMicrosecond(Some(ts_us), zone), _) => {
let value = microseconds_add(*ts_us, $RHS, get_sign!($OPERATION))?;
Ok(ScalarValue::TimestampMicrosecond(Some(value), zone.clone()))
}
(_, ScalarValue::TimestampMicrosecond(Some(ts_us), zone)) => {
let value = microseconds_add(*ts_us, $LHS, get_sign!($OPERATION))?;
Ok(ScalarValue::TimestampMicrosecond(Some(value), zone.clone()))
}
(ScalarValue::TimestampNanosecond(Some(ts_ns), zone), _) => {
let value = nanoseconds_add(*ts_ns, $RHS, get_sign!($OPERATION))?;
Ok(ScalarValue::TimestampNanosecond(Some(value), zone.clone()))
}
(_, ScalarValue::TimestampNanosecond(Some(ts_ns), zone)) => {
let value = nanoseconds_add(*ts_ns, $LHS, get_sign!($OPERATION))?;
Ok(ScalarValue::TimestampNanosecond(Some(value), zone.clone()))
}
(
ScalarValue::IntervalYearMonth(Some(lhs)),
ScalarValue::IntervalDayTime(Some(rhs)),
) => op_ym_dt(*lhs, *rhs, get_sign!($OPERATION), false),
(
ScalarValue::IntervalYearMonth(Some(lhs)),
ScalarValue::IntervalMonthDayNano(Some(rhs)),
) => op_ym_mdn(*lhs, *rhs, get_sign!($OPERATION), false),
(
ScalarValue::IntervalDayTime(Some(lhs)),
ScalarValue::IntervalYearMonth(Some(rhs)),
) => op_ym_dt(*rhs, *lhs, get_sign!($OPERATION), true),
(
ScalarValue::IntervalDayTime(Some(lhs)),
ScalarValue::IntervalMonthDayNano(Some(rhs)),
) => op_dt_mdn(*lhs, *rhs, get_sign!($OPERATION), false),
(
ScalarValue::IntervalMonthDayNano(Some(lhs)),
ScalarValue::IntervalYearMonth(Some(rhs)),
) => op_ym_mdn(*rhs, *lhs, get_sign!($OPERATION), true),
(
ScalarValue::IntervalMonthDayNano(Some(lhs)),
ScalarValue::IntervalDayTime(Some(rhs)),
) => op_dt_mdn(*rhs, *lhs, get_sign!($OPERATION), true),
_ => Err(DataFusionError::Internal(format!(
"Operator {} is not implemented for types {:?} and {:?}",
stringify!($OPERATION),
$LHS,
$RHS
))),
}
};
}
/// This function adds/subtracts two "raw" intervals (`lhs` and `rhs`) of different
/// types ([`IntervalYearMonthType`] and [`IntervalDayTimeType`], respectively).
/// The argument `sign` chooses between addition and subtraction, the argument
/// `commute` swaps `lhs` and `rhs`. The return value is an interval [`ScalarValue`]
/// with type data type [`IntervalMonthDayNanoType`].
#[inline]
fn op_ym_dt(mut lhs: i32, rhs: i64, sign: i32, commute: bool) -> Result<ScalarValue> {
let (mut days, millis) = IntervalDayTimeType::to_parts(rhs);
let mut nanos = (millis as i64) * 1_000_000;
if commute {
lhs *= sign;
} else {
days *= sign;
nanos *= sign as i64;
};
Ok(ScalarValue::new_interval_mdn(lhs, days, nanos))
}
/// This function adds/subtracts two "raw" intervals (`lhs` and `rhs`) of different
/// types ([`IntervalYearMonthType`] and [`IntervalMonthDayNanoType`], respectively).
/// The argument `sign` chooses between addition and subtraction, the argument
/// `commute` swaps `lhs` and `rhs`. The return value is an interval [`ScalarValue`]
/// with type data type [`IntervalMonthDayNanoType`].
#[inline]
fn op_ym_mdn(lhs: i32, rhs: i128, sign: i32, commute: bool) -> Result<ScalarValue> {
let (mut months, mut days, mut nanos) = IntervalMonthDayNanoType::to_parts(rhs);
if commute {
months += lhs * sign;
} else {
months = lhs + (months * sign);
days *= sign;
nanos *= sign as i64;
}
Ok(ScalarValue::new_interval_mdn(months, days, nanos))
}
/// This function adds/subtracts two "raw" intervals (`lhs` and `rhs`) of different
/// types ([`IntervalDayTimeType`] and [`IntervalMonthDayNanoType`], respectively).
/// The argument `sign` chooses between addition and subtraction, the argument
/// `commute` swaps `lhs` and `rhs`. The return value is an interval [`ScalarValue`]
/// with type data type [`IntervalMonthDayNanoType`].
#[inline]
fn op_dt_mdn(lhs: i64, rhs: i128, sign: i32, commute: bool) -> Result<ScalarValue> {
let (lhs_days, lhs_millis) = IntervalDayTimeType::to_parts(lhs);
let (rhs_months, rhs_days, rhs_nanos) = IntervalMonthDayNanoType::to_parts(rhs);
let result = if commute {
IntervalMonthDayNanoType::make_value(
rhs_months,
lhs_days * sign + rhs_days,
(lhs_millis * sign) as i64 * 1_000_000 + rhs_nanos,
)
} else {
IntervalMonthDayNanoType::make_value(
rhs_months * sign,
lhs_days + rhs_days * sign,
(lhs_millis as i64) * 1_000_000 + rhs_nanos * (sign as i64),
)
};
Ok(ScalarValue::IntervalMonthDayNano(Some(result)))
}
macro_rules! get_sign {
(+) => {
1
};
(-) => {
-1
};
}
#[derive(Clone, Copy)]
enum IntervalMode {
Milli,
Nano,
}
/// This function computes subtracts `rhs_ts` from `lhs_ts`, taking timezones
/// into account when given. Units of the resulting interval is specified by
/// the argument `mode`.
/// The default behavior of Datafusion is the following:
/// - When subtracting timestamps at seconds/milliseconds precision, the output
/// interval will have the type [`IntervalDayTimeType`].
/// - When subtracting timestamps at microseconds/nanoseconds precision, the
/// output interval will have the type [`IntervalMonthDayNanoType`].
fn ts_sub_to_interval(
lhs_ts: i64,
rhs_ts: i64,
lhs_tz: &Option<String>,
rhs_tz: &Option<String>,
mode: IntervalMode,
) -> Result<ScalarValue> {
let lhs_dt = with_timezone_to_naive_datetime(lhs_ts, lhs_tz, mode)?;
let rhs_dt = with_timezone_to_naive_datetime(rhs_ts, rhs_tz, mode)?;
let delta_secs = lhs_dt.signed_duration_since(rhs_dt);
match mode {
IntervalMode::Milli => {
let as_millisecs = delta_secs.num_milliseconds();
Ok(ScalarValue::new_interval_dt(
(as_millisecs / MILLISECS_IN_ONE_DAY) as i32,
(as_millisecs % MILLISECS_IN_ONE_DAY) as i32,
))
}
IntervalMode::Nano => {
let as_nanosecs = delta_secs.num_nanoseconds().ok_or_else(|| {
DataFusionError::Execution(String::from(
"Can not compute timestamp differences with nanosecond precision",
))
})?;
Ok(ScalarValue::new_interval_mdn(
0,
(as_nanosecs / NANOSECS_IN_ONE_DAY) as i32,
as_nanosecs % NANOSECS_IN_ONE_DAY,
))
}
}
}
/// This function creates the [`NaiveDateTime`] object corresponding to the
/// given timestamp using the units (tick size) implied by argument `mode`.
#[inline]
fn with_timezone_to_naive_datetime(
ts: i64,
tz: &Option<String>,
mode: IntervalMode,
) -> Result<NaiveDateTime> {
let datetime = if let IntervalMode::Milli = mode {
ticks_to_naive_datetime::<1_000_000>(ts)
} else {
ticks_to_naive_datetime::<1>(ts)
}?;
if let Some(tz) = tz {
let parsed_tz: Tz = FromStr::from_str(tz).map_err(|_| {
DataFusionError::Execution("cannot parse given timezone".to_string())
})?;
let offset = parsed_tz
.offset_from_local_datetime(&datetime)
.single()
.ok_or_else(|| {
DataFusionError::Execution(
"error conversion result of timezone offset".to_string(),
)
})?;
return Ok(DateTime::<Tz>::from_local(datetime, offset).naive_utc());
}
Ok(datetime)
}
/// This function creates the [`NaiveDateTime`] object corresponding to the
/// given timestamp, whose tick size is specified by `UNIT_NANOS`.
#[inline]
fn ticks_to_naive_datetime<const UNIT_NANOS: i64>(ticks: i64) -> Result<NaiveDateTime> {
NaiveDateTime::from_timestamp_opt(
(ticks * UNIT_NANOS) / 1_000_000_000,
((ticks * UNIT_NANOS) % 1_000_000_000) as u32,
)
.ok_or_else(|| {
DataFusionError::Execution(
"Can not convert given timestamp to a NaiveDateTime".to_string(),
)
})
}
#[inline]
pub fn date32_add(days: i32, scalar: &ScalarValue, sign: i32) -> Result<i32> {
let epoch = NaiveDate::from_ymd_opt(1970, 1, 1).unwrap();
let prior = epoch.add(Duration::days(days as i64));
do_date_math(prior, scalar, sign).map(|d| d.sub(epoch).num_days() as i32)
}
#[inline]
pub fn date64_add(ms: i64, scalar: &ScalarValue, sign: i32) -> Result<i64> {
let epoch = NaiveDate::from_ymd_opt(1970, 1, 1).unwrap();
let prior = epoch.add(Duration::milliseconds(ms));
do_date_math(prior, scalar, sign).map(|d| d.sub(epoch).num_milliseconds())
}
#[inline]
pub fn seconds_add(ts_s: i64, scalar: &ScalarValue, sign: i32) -> Result<i64> {
do_date_time_math(ts_s, 0, scalar, sign).map(|dt| dt.timestamp())
}
#[inline]
pub fn milliseconds_add(ts_ms: i64, scalar: &ScalarValue, sign: i32) -> Result<i64> {
let secs = ts_ms / 1000;
let nsecs = ((ts_ms % 1000) * 1_000_000) as u32;
do_date_time_math(secs, nsecs, scalar, sign).map(|dt| dt.timestamp_millis())
}
#[inline]
pub fn microseconds_add(ts_us: i64, scalar: &ScalarValue, sign: i32) -> Result<i64> {
let secs = ts_us / 1_000_000;
let nsecs = ((ts_us % 1_000_000) * 1000) as u32;
do_date_time_math(secs, nsecs, scalar, sign).map(|dt| dt.timestamp_nanos() / 1000)
}
#[inline]
pub fn nanoseconds_add(ts_ns: i64, scalar: &ScalarValue, sign: i32) -> Result<i64> {
let secs = ts_ns / 1_000_000_000;
let nsecs = (ts_ns % 1_000_000_000) as u32;
do_date_time_math(secs, nsecs, scalar, sign).map(|dt| dt.timestamp_nanos())
}
#[inline]
fn do_date_time_math(
secs: i64,
nsecs: u32,
scalar: &ScalarValue,
sign: i32,
) -> Result<NaiveDateTime> {
let prior = NaiveDateTime::from_timestamp_opt(secs, nsecs).ok_or_else(|| {
DataFusionError::Internal(format!(
"Could not conert to NaiveDateTime: secs {secs} nsecs {nsecs} scalar {scalar:?} sign {sign}"
))
})?;
do_date_math(prior, scalar, sign)
}
fn do_date_math<D>(prior: D, scalar: &ScalarValue, sign: i32) -> Result<D>
where
D: Datelike + Add<Duration, Output = D>,
{
Ok(match scalar {
ScalarValue::IntervalDayTime(Some(i)) => add_day_time(prior, *i, sign),
ScalarValue::IntervalYearMonth(Some(i)) => shift_months(prior, *i * sign),
ScalarValue::IntervalMonthDayNano(Some(i)) => add_m_d_nano(prior, *i, sign),
other => Err(DataFusionError::Execution(format!(
"DateIntervalExpr does not support non-interval type {other:?}"
)))?,
})