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use std::fmt;
use serde::{Deserialize, Serialize};
use lowertest::MzReflect;
use repr::adt::numeric::{self, Numeric};
use repr::adt::system::{Oid, RegClass, RegProc, RegType};
use repr::{strconv, ColumnType, ScalarType};
use crate::scalar::func::EagerUnaryFunc;
use crate::EvalError;
sqlfunc!(
#[sqlname = "-"]
fn neg_int32(a: i32) -> i32 {
-a
}
);
sqlfunc!(
#[sqlname = "~"]
fn bit_not_int32(a: i32) -> i32 {
!a
}
);
sqlfunc!(
#[sqlname = "abs"]
fn abs_int32(a: i32) -> i32 {
a.abs()
}
);
sqlfunc!(
#[sqlname = "i32tobool"]
fn cast_int32_to_bool(a: i32) -> bool {
a != 0
}
);
sqlfunc!(
#[sqlname = "i32tof32"]
fn cast_int32_to_float32(a: i32) -> f32 {
a as f32
}
);
sqlfunc!(
#[sqlname = "i32tof64"]
#[preserves_uniqueness = true]
fn cast_int32_to_float64(a: i32) -> f64 {
f64::from(a)
}
);
sqlfunc!(
#[sqlname = "i32toi16"]
#[preserves_uniqueness = true]
fn cast_int32_to_int16(a: i32) -> Result<i16, EvalError> {
i16::try_from(a).or(Err(EvalError::Int16OutOfRange))
}
);
sqlfunc!(
#[sqlname = "i32toi64"]
#[preserves_uniqueness = true]
fn cast_int32_to_int64(a: i32) -> i64 {
i64::from(a)
}
);
sqlfunc!(
#[sqlname = "i32tostr"]
#[preserves_uniqueness = true]
fn cast_int32_to_string(a: i32) -> String {
let mut buf = String::new();
strconv::format_int32(&mut buf, a);
buf
}
);
#[derive(Ord, PartialOrd, Clone, Debug, Eq, PartialEq, Serialize, Deserialize, Hash, MzReflect)]
pub struct CastInt32ToNumeric(pub Option<u8>);
impl<'a> EagerUnaryFunc<'a> for CastInt32ToNumeric {
type Input = i32;
type Output = Result<Numeric, EvalError>;
fn call(&self, a: i32) -> Result<Numeric, EvalError> {
let mut a = Numeric::from(a);
if let Some(scale) = self.0 {
if numeric::rescale(&mut a, scale).is_err() {
return Err(EvalError::NumericFieldOverflow);
}
}
Ok(a)
}
fn output_type(&self, input: ColumnType) -> ColumnType {
ScalarType::Numeric { scale: self.0 }.nullable(input.nullable)
}
}
impl fmt::Display for CastInt32ToNumeric {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str("i32tonumeric")
}
}
sqlfunc!(
#[sqlname = "i32tooid"]
#[preserves_uniqueness = true]
fn cast_int32_to_oid(a: i32) -> Oid {
Oid(a)
}
);
sqlfunc!(
#[sqlname = "i32toregclass"]
#[preserves_uniqueness = true]
fn cast_int32_to_reg_class(a: i32) -> RegClass {
RegClass(a)
}
);
sqlfunc!(
#[sqlname = "i32toregproc"]
#[preserves_uniqueness = true]
fn cast_int32_to_reg_proc(a: i32) -> RegProc {
RegProc(a)
}
);
sqlfunc!(
#[sqlname = "i32toregtype"]
#[preserves_uniqueness = true]
fn cast_int32_to_reg_type(a: i32) -> RegType {
RegType(a)
}
);