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datum.rs
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// Copyright 2023 The CeresDB Authors
//
// Licensed 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.
//! Datum holds different kind of data
use std::{convert::TryFrom, fmt, str};
use arrow::{
datatypes::{DataType, TimeUnit},
temporal_conversions::{EPOCH_DAYS_FROM_CE, NANOSECONDS},
};
use bytes_ext::Bytes;
use ceresdbproto::schema::DataType as DataTypePb;
use chrono::{Datelike, Local, NaiveDate, NaiveTime, TimeZone, Timelike};
use datafusion::scalar::ScalarValue;
use hash_ext::hash64;
use serde::ser::{Serialize, Serializer};
use snafu::{Backtrace, OptionExt, ResultExt, Snafu};
use sqlparser::ast::{DataType as SqlDataType, Value};
use crate::{hex, string::StringBytes, time::Timestamp};
const DATE_FORMAT: &str = "%Y-%m-%d";
const TIME_FORMAT: &str = "%H:%M:%S%.3f";
const NULL_VALUE_FOR_HASH: u128 = u128::MAX;
#[derive(Debug, Snafu)]
pub enum Error {
#[snafu(display("Unsupported SQL data type, type:{sql_type}.\nBacktrace:\n{backtrace}"))]
UnsupportedDataType {
sql_type: SqlDataType,
backtrace: Backtrace,
},
#[snafu(display("Invalid double or float, err:{source}.\nBacktrace:\n{backtrace}"))]
InvalidDouble {
source: std::num::ParseFloatError,
backtrace: Backtrace,
},
#[snafu(display(
"Invalid insert value, kind:{kind}, value:{value:?}.\nBacktrace:\n{backtrace}"
))]
InvalidValueType {
kind: DatumKind,
value: Value,
backtrace: Backtrace,
},
#[snafu(display("Invalid timestamp, err:{source}.\nBacktrace:\n{backtrace}"))]
InvalidTimestamp {
source: std::num::ParseIntError,
backtrace: Backtrace,
},
#[snafu(display("Invalid date, err:{source}.\nBacktrace:\n{backtrace}"))]
InvalidDate {
source: chrono::ParseError,
backtrace: Backtrace,
},
#[snafu(display("Invalid time, err:{source}.\nBacktrace:\n{backtrace}"))]
InvalidTimeCause {
source: chrono::ParseError,
backtrace: Backtrace,
},
#[snafu(display("Invalid time, err:{source}.\nBacktrace:\n{backtrace}"))]
InvalidTimeHourFormat {
source: std::num::ParseIntError,
backtrace: Backtrace,
},
#[snafu(display("Invalid time, err:{msg}.\nBacktrace:\n{backtrace}"))]
InvalidTimeNoCause { msg: String, backtrace: Backtrace },
#[snafu(display("Invalid integer, err:{source}.\nBacktrace:\n{backtrace}"))]
InvalidInt {
source: std::num::ParseIntError,
backtrace: Backtrace,
},
#[snafu(display("Invalid datum byte, byte:{value}.\nBacktrace:\n{backtrace}"))]
InvalidDatumByte { value: u8, backtrace: Backtrace },
#[snafu(display("Invalid hex value, hex_val:{hex_val}.\nBacktrace:\n{backtrace}"))]
InvalidHexValue {
hex_val: String,
backtrace: Backtrace,
},
}
pub type Result<T> = std::result::Result<T, Error>;
// Float wrapper over f32/f64. Just because we cannot build std::hash::Hash for
// floats directly we have to do it through type wrapper
// Fork from datafusion:
// https://github.com/apache/arrow-datafusion/blob/1a0542acbc01e5243471ae0fc3586c2f1f40013b/datafusion/common/src/scalar.rs#L1493
struct Fl<T>(T);
macro_rules! hash_float_value {
($(($t:ty, $i:ty)),+) => {
$(impl std::hash::Hash for Fl<$t> {
#[inline]
fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
state.write(&<$i>::from_ne_bytes(self.0.to_ne_bytes()).to_ne_bytes())
}
})+
};
}
hash_float_value!((f64, u64), (f32, u32));
// FIXME(yingwen): How to handle timezone?
/// Data type of datum
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum DatumKind {
Null = 0,
Timestamp,
Double,
Float,
Varbinary,
String,
UInt64,
UInt32,
UInt16,
UInt8,
Int64,
Int32,
Int16,
Int8,
Boolean,
Date,
Time,
}
impl DatumKind {
pub const VALUES: [Self; 17] = [
Self::Null,
Self::Timestamp,
Self::Double,
Self::Float,
Self::Varbinary,
Self::String,
Self::UInt64,
Self::UInt32,
Self::UInt16,
Self::UInt8,
Self::Int64,
Self::Int32,
Self::Int16,
Self::Int8,
Self::Boolean,
Self::Date,
Self::Time,
];
/// Return true if this is DatumKind::Timestamp
pub fn is_timestamp(&self) -> bool {
matches!(self, DatumKind::Timestamp)
}
pub fn is_f64_castable(&self) -> bool {
matches!(
self,
Self::Double
| Self::Float
| Self::UInt64
| Self::UInt32
| Self::UInt16
| Self::UInt8
| Self::Int64
| Self::Int32
| Self::Int16
| Self::Int8
)
}
/// Can column of this datum kind used as key column
pub fn is_key_kind(&self) -> bool {
matches!(
self,
DatumKind::Timestamp
| DatumKind::Varbinary
| DatumKind::String
| DatumKind::UInt64
| DatumKind::UInt32
| DatumKind::UInt16
| DatumKind::UInt8
| DatumKind::Int64
| DatumKind::Int32
| DatumKind::Int16
| DatumKind::Int8
| DatumKind::Boolean
| DatumKind::Date
| DatumKind::Time
)
}
/// Can column of this datum kind used as dictionary encode column
pub fn is_dictionary_kind(&self) -> bool {
matches!(self, DatumKind::String)
}
pub fn unsign_kind(&self) -> Option<Self> {
match self {
Self::Int64 | Self::UInt64 => Some(Self::UInt64),
Self::Int32 | Self::UInt32 => Some(Self::UInt32),
Self::Int16 | Self::UInt16 => Some(Self::UInt16),
Self::Int8 | Self::UInt8 => Some(Self::UInt8),
_ => None,
}
}
/// Get name of this kind.
fn as_str(&self) -> &str {
match self {
DatumKind::Null => "null",
DatumKind::Timestamp => "timestamp",
DatumKind::Double => "double",
DatumKind::Float => "float",
DatumKind::Varbinary => "varbinary",
DatumKind::String => "string",
DatumKind::UInt64 => "uint64",
DatumKind::UInt32 => "uint32",
DatumKind::UInt16 => "uint16",
DatumKind::UInt8 => "uint8",
DatumKind::Int64 => "bigint",
DatumKind::Int32 => "int",
DatumKind::Int16 => "smallint",
DatumKind::Int8 => "tinyint",
DatumKind::Boolean => "boolean",
DatumKind::Date => "date",
DatumKind::Time => "time",
}
}
/// Convert into a byte.
#[inline]
pub fn into_u8(self) -> u8 {
self as u8
}
/// Return None for variable-length type
pub fn size(&self) -> Option<usize> {
let size = match self {
DatumKind::Null => 0,
DatumKind::Timestamp => 8,
DatumKind::Double => 8,
DatumKind::Float => 4,
DatumKind::Varbinary => return None,
DatumKind::String => return None,
DatumKind::UInt64 => 8,
DatumKind::UInt32 => 4,
DatumKind::UInt16 => 2,
DatumKind::UInt8 => 1,
DatumKind::Int64 => 8,
DatumKind::Int32 => 4,
DatumKind::Int16 => 2,
DatumKind::Int8 => 1,
DatumKind::Boolean => 1,
DatumKind::Date => 4,
DatumKind::Time => 8,
};
Some(size)
}
}
impl TryFrom<&SqlDataType> for DatumKind {
type Error = Error;
fn try_from(sql_type: &SqlDataType) -> Result<Self> {
match sql_type {
// TODO(yingwen): Consider timezone
SqlDataType::Timestamp(_, _) => Ok(Self::Timestamp),
SqlDataType::Real | SqlDataType::Float(_) => Ok(Self::Float),
SqlDataType::Double => Ok(Self::Double),
SqlDataType::Boolean => Ok(Self::Boolean),
SqlDataType::BigInt(_) => Ok(Self::Int64),
SqlDataType::Int(_) => Ok(Self::Int32),
SqlDataType::SmallInt(_) => Ok(Self::Int16),
SqlDataType::String => Ok(Self::String),
SqlDataType::Varbinary(_) => Ok(Self::Varbinary),
SqlDataType::Date => Ok(Self::Date),
SqlDataType::Time(_, _) => Ok(Self::Time),
SqlDataType::Custom(objects, _) if objects.0.len() == 1 => {
match objects.0[0].value.as_str() {
"UINT64" | "uint64" => Ok(Self::UInt64),
"UINT32" | "uint32" => Ok(Self::UInt32),
"UINT16" | "uint16" => Ok(Self::UInt16),
"UINT8" | "uint8" => Ok(Self::UInt8),
"INT64" | "int64" => Ok(Self::Int64),
"INT32" | "int32" => Ok(Self::Int32),
"INT16" | "int16" => Ok(Self::Int16),
"TINYINT" | "INT8" | "tinyint" | "int8" => Ok(Self::Int8),
_ => UnsupportedDataType {
sql_type: sql_type.clone(),
}
.fail(),
}
}
// Unlike datafusion, Decimal is not supported now
_ => UnsupportedDataType {
sql_type: sql_type.clone(),
}
.fail(),
}
}
}
impl TryFrom<u8> for DatumKind {
type Error = Error;
fn try_from(v: u8) -> Result<Self> {
match v {
v if DatumKind::Null.into_u8() == v => Ok(DatumKind::Null),
v if DatumKind::Timestamp.into_u8() == v => Ok(DatumKind::Timestamp),
v if DatumKind::Double.into_u8() == v => Ok(DatumKind::Double),
v if DatumKind::Float.into_u8() == v => Ok(DatumKind::Float),
v if DatumKind::Varbinary.into_u8() == v => Ok(DatumKind::Varbinary),
v if DatumKind::String.into_u8() == v => Ok(DatumKind::String),
v if DatumKind::UInt64.into_u8() == v => Ok(DatumKind::UInt64),
v if DatumKind::UInt32.into_u8() == v => Ok(DatumKind::UInt32),
v if DatumKind::UInt16.into_u8() == v => Ok(DatumKind::UInt16),
v if DatumKind::UInt8.into_u8() == v => Ok(DatumKind::UInt8),
v if DatumKind::Int64.into_u8() == v => Ok(DatumKind::Int64),
v if DatumKind::Int32.into_u8() == v => Ok(DatumKind::Int32),
v if DatumKind::Int16.into_u8() == v => Ok(DatumKind::Int16),
v if DatumKind::Int8.into_u8() == v => Ok(DatumKind::Int8),
v if DatumKind::Boolean.into_u8() == v => Ok(DatumKind::Boolean),
v if DatumKind::Date.into_u8() == v => Ok(DatumKind::Date),
v if DatumKind::Time.into_u8() == v => Ok(DatumKind::Time),
_ => InvalidDatumByte { value: v }.fail(),
}
}
}
impl From<DatumKind> for DataTypePb {
fn from(kind: DatumKind) -> Self {
match kind {
DatumKind::Null => Self::Null,
DatumKind::Timestamp => Self::Timestamp,
DatumKind::Double => Self::Double,
DatumKind::Float => Self::Float,
DatumKind::Varbinary => Self::Varbinary,
DatumKind::String => Self::String,
DatumKind::UInt64 => Self::Uint64,
DatumKind::UInt32 => Self::Uint32,
DatumKind::UInt16 => Self::Uint16,
DatumKind::UInt8 => Self::Uint8,
DatumKind::Int64 => Self::Int64,
DatumKind::Int32 => Self::Int32,
DatumKind::Int16 => Self::Int16,
DatumKind::Int8 => Self::Int8,
DatumKind::Boolean => Self::Bool,
DatumKind::Date => Self::Date,
DatumKind::Time => Self::Time,
}
}
}
impl From<DataTypePb> for DatumKind {
fn from(data_type: DataTypePb) -> Self {
match data_type {
DataTypePb::Null => DatumKind::Null,
DataTypePb::Timestamp => DatumKind::Timestamp,
DataTypePb::Double => DatumKind::Double,
DataTypePb::Float => DatumKind::Float,
DataTypePb::Varbinary => DatumKind::Varbinary,
DataTypePb::String => DatumKind::String,
DataTypePb::Uint64 => DatumKind::UInt64,
DataTypePb::Uint32 => DatumKind::UInt32,
DataTypePb::Uint16 => DatumKind::UInt16,
DataTypePb::Uint8 => DatumKind::UInt8,
DataTypePb::Int64 => DatumKind::Int64,
DataTypePb::Int32 => DatumKind::Int32,
DataTypePb::Int16 => DatumKind::Int16,
DataTypePb::Int8 => DatumKind::Int8,
DataTypePb::Bool => DatumKind::Boolean,
DataTypePb::Date => DatumKind::Date,
DataTypePb::Time => DatumKind::Time,
}
}
}
impl fmt::Display for DatumKind {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.as_str())
}
}
// FIXME(yingwen): Validate the length of string and varbinary.
/// A data box holds different kind of data
#[derive(Debug, Clone, PartialEq, PartialOrd)]
pub enum Datum {
Null,
/// Millisecond precision
///
/// Map to arrow::datatypes::DataType::Timestamp(TimeUnit::Millisecond,
/// None)
Timestamp(Timestamp),
/// Map to arrow::datatypes::DataType::Float64
Double(f64),
/// Map to arrow::datatypes::DataType::Float32
Float(f32),
/// Map to arrow::datatypes::DateType::Binary
///
/// No more than 2G (size of i32)
Varbinary(Bytes),
/// Map to arrow::datatypes::DataType::String
///
/// No more than 2G (size of i32)
String(StringBytes),
/// Map to arrow::datatypes::DataType::UInt64
UInt64(u64),
UInt32(u32),
UInt16(u16),
UInt8(u8),
Int64(i64),
Int32(i32),
Int16(i16),
Int8(i8),
Boolean(bool),
/// Date represents the elapsed days since UNIX epoch.
/// It is mapped to [`arrow::datatypes::DataType::Date32`].
/// The supported date range is '-9999-01-01' to '9999-12-31'.
Date(i32),
/// Time represents the elapsed nanoseconds since midnight.
/// It is mapped to [`arrow::datatypes::DataType::Time64`].
/// The supported time range is '-838:59:59.000000' to '838:59:59.000000'.
Time(i64),
}
impl Datum {
/// Creates an empty datum by given datum kind
pub fn empty(kind: &DatumKind) -> Self {
match kind {
DatumKind::Null => Self::Null,
DatumKind::Timestamp => Self::Timestamp(Timestamp::new(0)),
DatumKind::Double => Self::Double(0.0),
DatumKind::Float => Self::Float(0.0),
DatumKind::Varbinary => Self::Varbinary(Bytes::new()),
DatumKind::String => Self::String(StringBytes::new()),
DatumKind::UInt64 => Self::UInt64(0),
DatumKind::UInt32 => Self::UInt32(0),
DatumKind::UInt16 => Self::UInt16(0),
DatumKind::UInt8 => Self::UInt8(0),
DatumKind::Int64 => Self::Int64(0),
DatumKind::Int32 => Self::Int32(0),
DatumKind::Int16 => Self::Int16(0),
DatumKind::Int8 => Self::Int8(0),
DatumKind::Boolean => Self::Boolean(false),
DatumKind::Date => Self::Date(0),
DatumKind::Time => Self::Time(0),
}
}
/// Return the kind of datum
pub fn kind(&self) -> DatumKind {
match self {
Datum::Null => DatumKind::Null,
Datum::Timestamp(_) => DatumKind::Timestamp,
Datum::Double(_) => DatumKind::Double,
Datum::Float(_) => DatumKind::Float,
Datum::Varbinary(_) => DatumKind::Varbinary,
Datum::String(_) => DatumKind::String,
Datum::UInt64(_) => DatumKind::UInt64,
Datum::UInt32(_) => DatumKind::UInt32,
Datum::UInt16(_) => DatumKind::UInt16,
Datum::UInt8(_) => DatumKind::UInt8,
Datum::Int64(_) => DatumKind::Int64,
Datum::Int32(_) => DatumKind::Int32,
Datum::Int16(_) => DatumKind::Int16,
Datum::Int8(_) => DatumKind::Int8,
Datum::Boolean(_) => DatumKind::Boolean,
Datum::Date(_) => DatumKind::Date,
Datum::Time(_) => DatumKind::Time,
}
}
// TODO: handle error
pub fn convert_to_uint64(&self) -> u64 {
match self {
Datum::Null => 0,
Datum::Timestamp(v) => v.as_i64() as u64,
Datum::Double(v) => *v as u64,
Datum::Float(v) => *v as u64,
Datum::Varbinary(v) => hash64(&v[..]),
Datum::String(v) => hash64(v.as_bytes()),
Datum::UInt64(v) => *v,
Datum::UInt32(v) => *v as u64,
Datum::UInt16(v) => *v as u64,
Datum::UInt8(v) => *v as u64,
Datum::Int64(v) => *v as u64,
Datum::Int32(v) => *v as u64,
Datum::Int16(v) => *v as u64,
Datum::Int8(v) => *v as u64,
Datum::Boolean(v) => *v as u64,
Datum::Date(v) => *v as u64,
Datum::Time(v) => *v as u64,
}
}
pub fn is_null(&self) -> bool {
matches!(self, Datum::Null)
}
/// Cast datum to timestamp.
pub fn as_timestamp(&self) -> Option<Timestamp> {
match self {
Datum::Timestamp(v) => Some(*v),
_ => None,
}
}
/// Cast datum to &str.
pub fn as_str(&self) -> Option<&str> {
match self {
Datum::String(v) => Some(v),
_ => None,
}
}
/// Cast datum to uint64.
pub fn as_u64(&self) -> Option<u64> {
match self {
Datum::UInt64(v) => Some(*v),
Datum::UInt32(v) => Some(*v as u64),
Datum::UInt16(v) => Some(*v as u64),
Datum::UInt8(v) => Some(*v as u64),
Datum::Int64(v) => Some(*v as u64),
Datum::Int32(v) => Some(*v as u64),
Datum::Int16(v) => Some(*v as u64),
Datum::Int8(v) => Some(*v as u64),
Datum::Boolean(v) => Some(*v as u64),
_ => None,
}
}
/// Cast datum to int64.
pub fn as_i64(&self) -> Option<i64> {
match self {
Datum::UInt64(v) => Some(*v as i64),
Datum::UInt32(v) => Some(*v as i64),
Datum::UInt16(v) => Some(*v as i64),
Datum::UInt8(v) => Some(*v as i64),
Datum::Int64(v) => Some(*v),
Datum::Int32(v) => Some(*v as i64),
Datum::Int16(v) => Some(*v as i64),
Datum::Int8(v) => Some(*v as i64),
Datum::Boolean(v) => Some(*v as i64),
Datum::Date(v) => Some(*v as i64),
Datum::Time(v) => Some(*v),
_ => None,
}
}
/// Cast datum to Bytes.
pub fn as_varbinary(&self) -> Option<&Bytes> {
match self {
Datum::Varbinary(v) => Some(v),
_ => None,
}
}
pub fn as_f32(&self) -> Option<f32> {
match self {
Datum::Float(v) => Some(*v),
_ => None,
}
}
pub fn as_f64(&self) -> Option<f64> {
match self {
Datum::Double(v) => Some(*v),
Datum::Float(v) => Some(*v as f64),
Datum::UInt64(v) => Some(*v as f64),
Datum::UInt32(v) => Some(*v as f64),
Datum::UInt16(v) => Some(*v as f64),
Datum::UInt8(v) => Some(*v as f64),
Datum::Int64(v) => Some(*v as f64),
Datum::Int32(v) => Some(*v as f64),
Datum::Date(v) => Some(*v as f64),
Datum::Time(v) => Some(*v as f64),
Datum::Int16(v) => Some(*v as f64),
Datum::Int8(v) => Some(*v as f64),
Datum::Boolean(_)
| Datum::Null
| Datum::Timestamp(_)
| Datum::Varbinary(_)
| Datum::String(_) => None,
}
}
pub fn do_with_bytes<F>(&self, mut f: F)
where
F: FnMut(&[u8]),
{
match self {
Datum::Double(v) => {
let arr = v.to_le_bytes();
f(arr.as_slice())
}
Datum::Float(v) => {
let arr = v.to_le_bytes();
f(arr.as_slice())
}
Datum::UInt64(v) => {
let arr = v.to_le_bytes();
f(arr.as_slice())
}
Datum::UInt32(v) => {
let arr = v.to_le_bytes();
f(arr.as_slice())
}
Datum::UInt16(v) => {
let arr = v.to_le_bytes();
f(arr.as_slice())
}
Datum::UInt8(v) => {
let arr = v.to_le_bytes();
f(arr.as_slice())
}
Datum::Int64(v) => {
let arr = v.to_le_bytes();
f(arr.as_slice())
}
Datum::Int32(v) => {
let arr = v.to_le_bytes();
f(arr.as_slice())
}
Datum::Int16(v) => {
let arr = v.to_le_bytes();
f(arr.as_slice())
}
Datum::Int8(v) => {
let arr = v.to_le_bytes();
f(arr.as_slice())
}
Datum::Boolean(v) => {
if *v {
f(&[1])
} else {
f(&[0])
}
}
Datum::Null => f(&[0]),
Datum::Timestamp(v) => {
let arr = v.as_i64().to_le_bytes();
f(arr.as_slice())
}
Datum::Varbinary(v) => f(v.as_ref()),
Datum::String(v) => f(v.as_bytes()),
Datum::Date(v) => {
let arr = v.to_le_bytes();
f(arr.as_slice())
}
Datum::Time(v) => {
let arr = v.to_le_bytes();
f(arr.as_slice())
}
}
}
pub fn to_bytes(&self) -> Vec<u8> {
match self {
Datum::Double(v) => v.to_le_bytes().to_vec(),
Datum::Float(v) => v.to_le_bytes().to_vec(),
Datum::UInt64(v) => v.to_le_bytes().to_vec(),
Datum::UInt32(v) => v.to_le_bytes().to_vec(),
Datum::UInt16(v) => v.to_le_bytes().to_vec(),
Datum::UInt8(v) => v.to_le_bytes().to_vec(),
Datum::Int64(v) => v.to_le_bytes().to_vec(),
Datum::Int32(v) => v.to_le_bytes().to_vec(),
Datum::Int16(v) => v.to_le_bytes().to_vec(),
Datum::Int8(v) => v.to_le_bytes().to_vec(),
Datum::Boolean(v) => {
if *v {
vec![1]
} else {
vec![0]
}
}
Datum::Null => vec![0],
Datum::Timestamp(ts) => ts.as_i64().to_le_bytes().to_vec(),
Datum::Varbinary(b) => b.to_vec(),
Datum::String(string) => string.as_bytes().to_vec(),
Datum::Date(v) => v.to_le_bytes().to_vec(),
Datum::Time(v) => v.to_le_bytes().to_vec(),
}
}
/// Generate a negative datum if possible.
///
/// It will return `None` if:
/// - The data type has no negative value.
/// - The negative value overflows.
pub fn to_negative(self) -> Option<Self> {
match self {
Datum::Null => None,
Datum::Timestamp(_) => None,
Datum::Double(v) => Some(Datum::Double(-v)),
Datum::Float(v) => Some(Datum::Float(-v)),
Datum::Varbinary(_) => None,
Datum::String(_) => None,
Datum::UInt64(_) => None,
Datum::UInt32(_) => None,
Datum::UInt16(_) => None,
Datum::UInt8(_) => None,
Datum::Int64(v) => 0i64.checked_sub(v).map(Datum::Int64),
Datum::Int32(v) => 0i32.checked_sub(v).map(Datum::Int32),
Datum::Int16(v) => 0i16.checked_sub(v).map(Datum::Int16),
Datum::Int8(v) => 0i8.checked_sub(v).map(Datum::Int8),
Datum::Boolean(v) => Some(Datum::Boolean(!v)),
Datum::Date(_) => None,
Datum::Time(_) => None,
}
}
pub fn display_string(&self) -> String {
match self {
Datum::Null => "null".to_string(),
Datum::Timestamp(v) => Local.timestamp_millis_opt(v.as_i64()).unwrap().to_rfc3339(),
Datum::Double(v) => v.to_string(),
Datum::Float(v) => v.to_string(),
Datum::Varbinary(v) => format!("{v:?}"),
Datum::String(v) => v.to_string(),
Datum::UInt64(v) => v.to_string(),
Datum::UInt32(v) => v.to_string(),
Datum::UInt16(v) => v.to_string(),
Datum::UInt8(v) => v.to_string(),
Datum::Int64(v) => v.to_string(),
Datum::Int32(v) => v.to_string(),
Datum::Int16(v) => v.to_string(),
Datum::Int8(v) => v.to_string(),
Datum::Boolean(v) => v.to_string(),
// Display the Date(32 bits) as String.
// Date(v) represent the days from Unix epoch(1970-01-01),
// so it is necessary to add `EPOCH_DAYS_FROM_CE` to generate
// `NaiveDate`.
Datum::Date(v) => NaiveDate::from_num_days_from_ce_opt((*v) + EPOCH_DAYS_FROM_CE)
.unwrap()
.to_string(),
Datum::Time(v) => Datum::format_datum_time(v),
}
}
pub fn try_from_sql_value(kind: &DatumKind, value: Value) -> Result<Datum> {
match (kind, value) {
(DatumKind::Null, Value::Null) => Ok(Datum::Null),
(DatumKind::Timestamp, Value::Number(n, _long)) => {
let n = n.parse::<i64>().context(InvalidTimestamp)?;
Ok(Datum::Timestamp(Timestamp::new(n)))
}
(DatumKind::Date, Value::SingleQuotedString(s)) => {
let date = Self::parse_datum_date_from_str(&s)?;
Ok(date)
}
(DatumKind::Time, Value::SingleQuotedString(s)) => {
let datum_time = Self::parse_datum_time_from_str(&s)?;
Ok(datum_time)
}
(DatumKind::Double, Value::Number(n, _long)) => {
let n = n.parse::<f64>().context(InvalidDouble)?;
Ok(Datum::Double(n))
}
(DatumKind::Float, Value::Number(n, _long)) => {
let n = n.parse::<f32>().context(InvalidDouble)?;
Ok(Datum::Float(n))
}
// TODO(yingwen): Support hex string.
(DatumKind::Varbinary, Value::SingleQuotedString(s)) => {
Ok(Datum::Varbinary(Bytes::from(s)))
}
(DatumKind::String, Value::SingleQuotedString(s)) => {
Ok(Datum::String(StringBytes::from(s)))
}
(DatumKind::Varbinary, Value::DoubleQuotedString(s)) => {
Ok(Datum::Varbinary(Bytes::from(s)))
}
(DatumKind::Varbinary, Value::HexStringLiteral(s)) => {
let bytes = hex::try_decode(&s).context(InvalidHexValue { hex_val: s })?;
Ok(Datum::Varbinary(Bytes::from(bytes)))
}
(DatumKind::String, Value::DoubleQuotedString(s)) => {
Ok(Datum::String(StringBytes::from(s)))
}
(DatumKind::UInt64, Value::Number(n, _long)) => {
let n = n.parse::<u64>().context(InvalidInt)?;
Ok(Datum::UInt64(n))
}
(DatumKind::UInt32, Value::Number(n, _long)) => {
let n = n.parse::<u32>().context(InvalidInt)?;
Ok(Datum::UInt32(n))
}
(DatumKind::UInt16, Value::Number(n, _long)) => {
let n = n.parse::<u16>().context(InvalidInt)?;
Ok(Datum::UInt16(n))
}
(DatumKind::UInt8, Value::Number(n, _long)) => {
let n = n.parse::<u8>().context(InvalidInt)?;
Ok(Datum::UInt8(n))
}
(DatumKind::Int64, Value::Number(n, _long)) => {
let n = n.parse::<i64>().context(InvalidInt)?;
Ok(Datum::Int64(n))
}
(DatumKind::Int32, Value::Number(n, _long)) => {
let n = n.parse::<i32>().context(InvalidInt)?;
Ok(Datum::Int32(n))
}
(DatumKind::Int16, Value::Number(n, _long)) => {
let n = n.parse::<i16>().context(InvalidInt)?;
Ok(Datum::Int16(n))
}
(DatumKind::Int8, Value::Number(n, _long)) => {
let n = n.parse::<i8>().context(InvalidInt)?;
Ok(Datum::Int8(n))
}
(DatumKind::Boolean, Value::Boolean(b)) => Ok(Datum::Boolean(b)),
(_, value) => InvalidValueType { kind: *kind, value }.fail(),
}
}
/// format the `Datum::Time`(64 bits) as String.
/// Time represent the nanoseconds from midnight,
/// so it is necessary to split `v` into seconds and nanoseconds to
/// generate `NaiveTime`.
pub fn format_datum_time(v: &i64) -> String {
let abs_nanos = (*v).abs();
let hours = abs_nanos / 3600 / NANOSECONDS;
let time = NaiveTime::from_num_seconds_from_midnight_opt(
(abs_nanos / NANOSECONDS - hours * 3600) as u32,
(abs_nanos % NANOSECONDS) as u32,
)
.unwrap();
let minute_sec = &(time.to_string())[3..];
if *v < 0 {
format!("-{hours:02}:{minute_sec}")
} else {
format!("{hours:02}:{minute_sec}")
}
}
/// format the `Datum::Date`(32 bits) as String.
fn format_datum_date(v: &i32) -> String {
NaiveDate::from_num_days_from_ce_opt((*v) + EPOCH_DAYS_FROM_CE)
.unwrap()
.format(DATE_FORMAT)
.to_string()
}
fn parse_datum_time_from_str(s: &str) -> Result<Datum> {
// `NaiveTime` contains two parts: `num_seconds_from_midnight`
// and `nanoseconds`, it is necessary to
// calculate them into number of nanoseconds from midnight.
if let Some(index) = s.find(':') {
let hours: i64 = (s[..index]).parse().context(InvalidTimeHourFormat)?;
let replace = format!("00:{}", &s[index + 1..]);
let time =
NaiveTime::parse_from_str(&replace, TIME_FORMAT).context(InvalidTimeCause)?;
let sec = hours.abs() * 3600 + (time.num_seconds_from_midnight() as i64);
let nanos = time.nanosecond() as i64 + sec * NANOSECONDS;
let nanos = if hours < 0 { -nanos } else { nanos };
Ok(Datum::Time(nanos))
} else {
InvalidTimeNoCause {
msg: "Invalid time format".to_string(),
}
.fail()
}
}
fn parse_datum_date_from_str(s: &str) -> Result<Datum> {
// `NaiveDate::num_days_from_ce()` returns the elapsed time
// since 0001-01-01 in days, it is necessary to
// subtract `EPOCH_DAYS_FROM_CE` to generate `Datum::Date`
let date = chrono::NaiveDate::parse_from_str(s, DATE_FORMAT).context(InvalidDate)?;
let days = date.num_days_from_ce() - EPOCH_DAYS_FROM_CE;
Ok(Datum::Date(days))
}
pub fn is_fixed_sized(&self) -> bool {
match self {
Datum::Null
| Datum::Timestamp(_)
| Datum::Double(_)
| Datum::Float(_)
| Datum::UInt64(_)
| Datum::UInt32(_)
| Datum::UInt16(_)
| Datum::UInt8(_)
| Datum::Int64(_)
| Datum::Int32(_)
| Datum::Int16(_)
| Datum::Int8(_)
| Datum::Boolean(_)
| Datum::Date(_)
| Datum::Time(_) => true,
Datum::Varbinary(_) | Datum::String(_) => false,
}
}
pub fn size(&self) -> usize {
match self {
Datum::Null => 1,
Datum::Timestamp(_) => 8,
Datum::Double(_) => 8,
Datum::Float(_) => 4,
Datum::Varbinary(v) => v.len(),
Datum::String(v) => v.len(),
Datum::UInt64(_) => 8,
Datum::UInt32(_) => 4,
Datum::UInt16(_) => 2,
Datum::UInt8(_) => 1,
Datum::Int64(_) => 8,
Datum::Int32(_) => 4,
Datum::Int16(_) => 2,
Datum::Int8(_) => 1,
Datum::Boolean(_) => 1,
Datum::Date(_) => 4,
Datum::Time(_) => 8,
}
}
pub fn as_view(&self) -> DatumView {
match self {
Datum::Null => DatumView::Null,
Datum::Timestamp(v) => DatumView::Timestamp(*v),
Datum::Double(v) => DatumView::Double(*v),
Datum::Float(v) => DatumView::Float(*v),
Datum::Varbinary(v) => DatumView::Varbinary(v),
Datum::String(v) => DatumView::String(v),
Datum::UInt64(v) => DatumView::UInt64(*v),
Datum::UInt32(v) => DatumView::UInt32(*v),
Datum::UInt16(v) => DatumView::UInt16(*v),
Datum::UInt8(v) => DatumView::UInt8(*v),
Datum::Int64(v) => DatumView::Int64(*v),
Datum::Int32(v) => DatumView::Int32(*v),
Datum::Date(v) => DatumView::Date(*v),
Datum::Time(v) => DatumView::Time(*v),
Datum::Int16(v) => DatumView::Int16(*v),
Datum::Int8(v) => DatumView::Int8(*v),
Datum::Boolean(v) => DatumView::Boolean(*v),
}
}
}
macro_rules! impl_from {
($Kind: ident, $FromType: ident) => {
impl From<$FromType> for Datum {
fn from(value: $FromType) -> Self {
Self::$Kind(value)
}
}
impl From<Option<$FromType>> for Datum {
fn from(value_opt: Option<$FromType>) -> Self {
match value_opt {
Some(value) => Self::$Kind(value),
None => Self::Null,
}
}
}
};
}
impl_from!(Timestamp, Timestamp);
impl_from!(Double, f64);
impl_from!(Float, f32);
impl_from!(Varbinary, Bytes);
impl_from!(String, StringBytes);
impl_from!(UInt64, u64);
impl_from!(UInt32, u32);
impl_from!(UInt16, u16);
impl_from!(UInt8, u8);
impl_from!(Int64, i64);
impl_from!(Int32, i32);
impl_from!(Int16, i16);
impl_from!(Int8, i8);
impl_from!(Boolean, bool);
impl From<&str> for Datum {
fn from(value: &str) -> Datum {
Datum::String(StringBytes::copy_from_str(value))
}