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use {
super::ValueError::ValueToExprConversionFailure,
crate::{
ast::AstLiteral,
ast::{DateTimeField, Expr},
chrono::{DateTime, Utc},
data::Interval,
prelude::DataType,
prelude::Value,
result::Error,
result::Result,
},
bigdecimal::{BigDecimal, FromPrimitive},
serde_json::{Map as JsonMap, Value as JsonValue},
uuid::Uuid,
};
impl TryFrom<Value> for Expr {
type Error = Error;
fn try_from(value: Value) -> Result<Self> {
const SECOND: i64 = 1_000_000;
let expr = match value {
Value::Bool(v) => Expr::Literal(AstLiteral::Boolean(v)),
Value::I8(v) => Expr::Literal(AstLiteral::Number(
BigDecimal::from_i8(v).ok_or(ValueToExprConversionFailure)?,
)),
Value::I16(v) => Expr::Literal(AstLiteral::Number(
BigDecimal::from_i16(v).ok_or(ValueToExprConversionFailure)?,
)),
Value::I32(v) => Expr::Literal(AstLiteral::Number(
BigDecimal::from_i32(v).ok_or(ValueToExprConversionFailure)?,
)),
Value::I64(v) => Expr::Literal(AstLiteral::Number(
BigDecimal::from_i64(v).ok_or(ValueToExprConversionFailure)?,
)),
Value::I128(v) => Expr::Literal(AstLiteral::Number(
BigDecimal::from_i128(v).ok_or(ValueToExprConversionFailure)?,
)),
Value::U8(v) => Expr::Literal(AstLiteral::Number(
BigDecimal::from_u8(v).ok_or(ValueToExprConversionFailure)?,
)),
Value::F64(v) => Expr::Literal(AstLiteral::Number(
BigDecimal::from_f64(v).ok_or(ValueToExprConversionFailure)?,
)),
Value::Decimal(v) => Expr::Literal(AstLiteral::Number(
BigDecimal::from_f64(v.try_into().map_err(|_| ValueToExprConversionFailure)?)
.ok_or(ValueToExprConversionFailure)?,
)),
Value::Str(v) => Expr::Literal(AstLiteral::QuotedString(v)),
Value::Bytea(v) => Expr::Literal(AstLiteral::HexString(hex::encode(v))),
Value::Date(v) => Expr::TypedString {
data_type: DataType::Date,
value: v.to_string(),
},
Value::Timestamp(v) => Expr::TypedString {
data_type: DataType::Timestamp,
value: DateTime::<Utc>::from_utc(v, Utc).to_string(),
},
Value::Time(v) => Expr::TypedString {
data_type: DataType::Time,
value: v.to_string(),
},
Value::Interval(v) => match v {
Interval::Month(v) => Expr::Interval {
expr: Box::new(Expr::Literal(AstLiteral::Number(
BigDecimal::from_i32(v).ok_or(ValueToExprConversionFailure)?,
))),
leading_field: Some(DateTimeField::Month),
last_field: None,
},
Interval::Microsecond(v) => Expr::Interval {
expr: Box::new(Expr::Literal(AstLiteral::Number(
BigDecimal::from_i64(v / SECOND).ok_or(ValueToExprConversionFailure)?,
))),
leading_field: Some(DateTimeField::Second),
last_field: None,
},
},
Value::Uuid(v) => Expr::Literal(AstLiteral::QuotedString(
Uuid::from_u128(v).hyphenated().to_string(),
)),
Value::Map(v) => {
let json: JsonValue = v
.into_iter()
.map(|(key, value)| value.try_into().map(|value| (key, value)))
.collect::<Result<Vec<(String, JsonValue)>>>()
.map(|v| JsonMap::from_iter(v).into())
.map_err(|_| ValueToExprConversionFailure)?;
Expr::Literal(AstLiteral::QuotedString(json.to_string()))
}
Value::List(v) => {
let json: JsonValue = v
.into_iter()
.map(|value| value.try_into())
.collect::<Result<Vec<JsonValue>>>()
.map(|v| v.into())
.map_err(|_| ValueToExprConversionFailure)?;
Expr::Literal(AstLiteral::QuotedString(json.to_string()))
}
Value::Null => Expr::Literal(AstLiteral::Null),
};
Ok(expr)
}
}
#[cfg(test)]
mod tests {
use {
crate::{
ast::{AstLiteral, DateTimeField, Expr},
data::Interval,
prelude::{DataType, Value},
},
bigdecimal::BigDecimal,
bigdecimal::FromPrimitive,
chrono::{NaiveDate, NaiveTime},
rust_decimal::Decimal,
std::collections::HashMap,
};
#[test]
fn value_to_expr() {
assert_eq!(
Value::Bool(true).try_into(),
Ok(Expr::Literal(AstLiteral::Boolean(true)))
);
assert_eq!(
Value::I8(127).try_into(),
Ok(Expr::Literal(AstLiteral::Number(
BigDecimal::from_i8(127).unwrap()
)))
);
assert_eq!(
Value::I16(32767).try_into(),
Ok(Expr::Literal(AstLiteral::Number(
BigDecimal::from_i16(32767).unwrap()
)))
);
assert_eq!(
Value::I32(2147483647).try_into(),
Ok(Expr::Literal(AstLiteral::Number(
BigDecimal::from_i32(2147483647).unwrap()
)))
);
assert_eq!(
Value::I64(64).try_into(),
Ok(Expr::Literal(AstLiteral::Number(
BigDecimal::from_i64(64).unwrap()
)))
);
assert_eq!(
Value::I128(128).try_into(),
Ok(Expr::Literal(AstLiteral::Number(
BigDecimal::from_i128(128).unwrap()
)))
);
assert_eq!(
Value::U8(8).try_into(),
Ok(Expr::Literal(AstLiteral::Number(
BigDecimal::from_u8(8).unwrap()
)))
);
assert_eq!(
Value::F64(64.4).try_into(),
Ok(Expr::Literal(AstLiteral::Number(
BigDecimal::from_f64(64.4).unwrap()
)))
);
assert_eq!(
Value::Decimal(Decimal::new(315, 2)).try_into(),
Ok(Expr::Literal(AstLiteral::Number(
BigDecimal::from_f64(3.15).unwrap()
)))
);
assert_eq!(
Value::Str("data".to_owned()).try_into(),
Ok(Expr::Literal(AstLiteral::QuotedString("data".to_owned())))
);
assert_eq!(
Value::Bytea(hex::decode("1234").unwrap()).try_into(),
Ok(Expr::Literal(AstLiteral::HexString("1234".to_owned())))
);
assert_eq!(
Value::Date(NaiveDate::from_ymd(2022, 11, 3)).try_into(),
Ok(Expr::TypedString {
data_type: DataType::Date,
value: "2022-11-03".to_owned(),
})
);
assert_eq!(
Value::Timestamp(NaiveDate::from_ymd(2022, 11, 3).and_hms_milli(8, 5, 30, 900))
.try_into(),
Ok(Expr::TypedString {
data_type: DataType::Timestamp,
value: "2022-11-03 08:05:30.900 UTC".to_owned(),
}),
);
assert_eq!(
Value::Time(NaiveTime::from_hms(20, 11, 59)).try_into(),
Ok(Expr::TypedString {
data_type: DataType::Time,
value: "20:11:59".to_owned()
}),
);
assert_eq!(
Value::Interval(Interval::Month(1)).try_into(),
Ok(Expr::Interval {
expr: Box::new(Expr::Literal(AstLiteral::Number(
BigDecimal::from_i64(1).unwrap()
))),
leading_field: Some(DateTimeField::Month),
last_field: None
})
);
assert_eq!(
Value::Uuid(195965723427462096757863453463987888808).try_into(),
Ok(Expr::Literal(AstLiteral::QuotedString(
"936da01f-9abd-4d9d-80c7-02af85c822a8".to_owned()
)))
);
assert_eq!(
Value::Map(HashMap::from([("a".to_owned(), Value::Bool(true))])).try_into(),
Ok(Expr::Literal(AstLiteral::QuotedString(
"{\"a\":true}".to_owned()
)))
);
assert_eq!(
Value::List(vec![
Value::I64(1),
Value::Bool(true),
Value::Str("a".to_owned())
])
.try_into(),
Ok(Expr::Literal(AstLiteral::QuotedString(
"[1,true,\"a\"]".to_owned()
)))
);
assert_eq!(Value::Null.try_into(), Ok(Expr::Literal(AstLiteral::Null)));
}
}