feat: point

sqlx-postgres/src/type_checking.rs

@@ -32,6 +32,8 @@ impl_type_checking!(
 
         sqlx::postgres::types::PgCube,
 
+        sqlx::postgres::types::PgPoint,
+
         #[cfg(feature = "uuid")]
         sqlx::types::Uuid,
 

sqlx-postgres/src/types/geometry/mod.rs

@@ -0,0 +1 @@
+pub mod point;

sqlx-postgres/src/types/geometry/point.rs

@@ -0,0 +1,138 @@
+use crate::decode::Decode;
+use crate::encode::{Encode, IsNull};
+use crate::error::BoxDynError;
+use crate::types::Type;
+use crate::{PgArgumentBuffer, PgHasArrayType, PgTypeInfo, PgValueFormat, PgValueRef, Postgres};
+use sqlx_core::bytes::Buf;
+use sqlx_core::Error;
+use std::str::FromStr;
+
+/// ## Postgres Geometric Point type
+///
+/// Description: Point on a plane
+/// Representation: `(x, y)`
+///
+/// Points are the fundamental two-dimensional building block for geometric types. Values of type point are specified using either of the following syntaxes:
+/// ```text
+/// ( x , y )
+///  x , y
+/// ````
+/// where x and y are the respective coordinates, as floating-point numbers.
+///
+/// See https://www.postgresql.org/docs/16/datatype-geometric.html#DATATYPE-GEOMETRIC-POINTS
+#[derive(Debug, Clone, PartialEq)]
+pub struct PgPoint {
+    pub x: f64,
+    pub y: f64,
+}
+
+impl Type<Postgres> for PgPoint {
+    fn type_info() -> PgTypeInfo {
+        PgTypeInfo::with_name("point")
+    }
+}
+
+impl PgHasArrayType for PgPoint {
+    fn array_type_info() -> PgTypeInfo {
+        PgTypeInfo::with_name("_point")
+    }
+}
+
+impl<'r> Decode<'r, Postgres> for PgPoint {
+    fn decode(value: PgValueRef<'r>) -> Result<Self, Box<dyn std::error::Error + Send + Sync>> {
+        match value.format() {
+            PgValueFormat::Text => Ok(PgPoint::from_str(value.as_str()?)?),
+            PgValueFormat::Binary => Ok(PgPoint::from_bytes(value.as_bytes()?)?),
+        }
+    }
+}
+
+impl<'q> Encode<'q, Postgres> for PgPoint {
+    fn produces(&self) -> Option<PgTypeInfo> {
+        Some(PgTypeInfo::with_name("point"))
+    }
+
+    fn encode_by_ref(&self, buf: &mut PgArgumentBuffer) -> Result<IsNull, BoxDynError> {
+        self.serialize(buf)?;
+        Ok(IsNull::No)
+    }
+}
+
+fn parse_float_from_str(s: &str, error_msg: &str) -> Result<f64, Error> {
+    s.trim()
+        .parse()
+        .map_err(|_| Error::Decode(error_msg.into()))
+}
+
+impl FromStr for PgPoint {
+    type Err = BoxDynError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let (x_str, y_str) = s
+            .trim_matches(|c| c == '(' || c == ')' || c == ' ')
+            .split_once(',')
+            .ok_or_else(|| format!("error decoding POINT: could not get x and y from {}", s))?;
+
+        let x = parse_float_from_str(x_str, "error decoding POINT: could not get x")?;
+        let y = parse_float_from_str(y_str, "error decoding POINT: could not get x")?;
+
+        Ok(PgPoint { x, y })
+    }
+}
+
+impl PgPoint {
+    fn from_bytes(mut bytes: &[u8]) -> Result<PgPoint, BoxDynError> {
+        let x = bytes.get_f64();
+        let y = bytes.get_f64();
+        Ok(PgPoint { x, y })
+    }
+
+    fn serialize(&self, buff: &mut PgArgumentBuffer) -> Result<(), BoxDynError> {
+        buff.extend_from_slice(&self.x.to_be_bytes());
+        buff.extend_from_slice(&self.y.to_be_bytes());
+        Ok(())
+    }
+
+    #[cfg(test)]
+    fn serialize_to_vec(&self) -> Vec<u8> {
+        let mut buff = PgArgumentBuffer::default();
+        self.serialize(&mut buff).unwrap();
+        buff.to_vec()
+    }
+}
+
+#[cfg(test)]
+mod point_tests {
+
+    use std::str::FromStr;
+
+    use super::PgPoint;
+
+    const POINT_BYTES: &[u8] = &[
+        64, 0, 204, 204, 204, 204, 204, 205, 64, 20, 204, 204, 204, 204, 204, 205,
+    ];
+
+    #[test]
+    fn can_deserialise_point_type_bytes() {
+        let point = PgPoint::from_bytes(POINT_BYTES).unwrap();
+        assert_eq!(point, PgPoint { x: 2.1, y: 5.2 })
+    }
+
+    #[test]
+    fn can_deserialise_point_type_str() {
+        let point = PgPoint::from_str("(2, 3)").unwrap();
+        assert_eq!(point, PgPoint { x: 2., y: 3. });
+    }
+
+    #[test]
+    fn can_deserialise_point_type_str_float() {
+        let point = PgPoint::from_str("(2.5, 3.4)").unwrap();
+        assert_eq!(point, PgPoint { x: 2.5, y: 3.4 });
+    }
+
+    #[test]
+    fn can_serialise_point_type() {
+        let point = PgPoint { x: 2.1, y: 5.2 };
+        assert_eq!(point.serialize_to_vec(), POINT_BYTES,)
+    }
+}

sqlx-postgres/src/types/mod.rs

@@ -21,6 +21,7 @@
 //! | [`PgLQuery`]                          | LQUERY                                               |
 //! | [`PgCiText`]                          | CITEXT<sup>1</sup>                                   |
 //! | [`PgCube`]                            | CUBE                                                 |
+//! | [`PgPoint]                            | POINT                                                |
 //! | [`PgHstore`]                          | HSTORE                                               |
 //!
 //! <sup>1</sup> SQLx generally considers `CITEXT` to be compatible with `String`, `&str`, etc.,
@@ -212,6 +213,8 @@ mod bigdecimal;
 
 mod cube;
 
+mod geometry;
+
 #[cfg(any(feature = "bigdecimal", feature = "rust_decimal"))]
 mod numeric;
 
@@ -242,6 +245,7 @@ mod bit_vec;
 pub use array::PgHasArrayType;
 pub use citext::PgCiText;
 pub use cube::PgCube;
+pub use geometry::point::PgPoint;
 pub use hstore::PgHstore;
 pub use interval::PgInterval;
 pub use lquery::PgLQuery;

sqlx-test/src/lib.rs

@@ -51,6 +51,12 @@ macro_rules! test_type {
         }
     };
 
+    ($name:ident<$ty:ty>($db:ident, $($text:literal @= $value:expr),+ $(,)?)) => {
+        paste::item! {
+            $crate::__test_prepared_type!($name<$ty>($db, $crate::[< $db _query_for_test_prepared_geometric_type >]!(), $($text == $value),+));
+        }
+    };
+
     ($name:ident($db:ident, $($text:literal == $value:expr),+ $(,)?)) => {
         $crate::test_type!($name<$name>($db, $($text == $value),+));
     };
@@ -82,6 +88,7 @@ macro_rules! test_prepared_type {
         }
     };
 
+
     ($name:ident($db:ident, $($text:literal == $value:expr),+ $(,)?)) => {
         $crate::__test_prepared_type!($name<$name>($db, $($text == $value),+));
     };
@@ -223,3 +230,10 @@ macro_rules! Postgres_query_for_test_prepared_type {
         "SELECT ({0} is not distinct from $1)::int4, {0}, $2"
     };
 }
+
+#[macro_export]
+macro_rules! Postgres_query_for_test_prepared_geometric_type {
+    () => {
+        "SELECT ({0}::text is not distinct from $1::text)::int4, {0}, $2"
+    };
+}

tests/postgres/types.rs

@@ -492,6 +492,17 @@ test_type!(_cube<Vec<sqlx::postgres::types::PgCube>>(Postgres,
     "array[cube(2.2,-3.4)]" == vec![sqlx::postgres::types::PgCube::OneDimensionInterval(2.2, -3.4)],
 ));
 
+#[cfg(any(postgres_12, postgres_13, postgres_14, postgres_15))]
+test_type!(point<sqlx::postgres::types::PgPoint>(Postgres,
+    "point(2.2,-3.4)" @= sqlx::postgres::types::PgPoint { x: 2.2, y:-3.4 },
+));
+
+#[cfg(any(postgres_12, postgres_13, postgres_14, postgres_15))]
+test_type!(_point<Vec<sqlx::postgres::types::PgPoint>>(Postgres,
+    "array[point(2,3),point(2.1,3.4)]" @= vec![sqlx::postgres::types::PgPoint { x:2., y: 3. }, sqlx::postgres::types::PgPoint { x:2.1, y: 3.4 }],
+    "array[point(2.2,-3.4)]" @= vec![sqlx::postgres::types::PgPoint { x: 2.2, y: -3.4 }],
+));
+
 #[cfg(feature = "rust_decimal")]
 test_type!(decimal<sqlx::types::Decimal>(Postgres,
     "0::numeric" == sqlx::types::Decimal::from_str("0").unwrap(),