feat: implement FromCqlVal and SerializeValue for PrimitiveDatetime

scylla-cql/src/frame/response/cql_to_rust.rs

@@ -228,6 +228,15 @@ impl FromCqlVal<CqlValue> for time_03::OffsetDateTime {
     }
 }
 
+#[cfg(feature = "time-03")]
+impl FromCqlVal<CqlValue> for time_03::PrimitiveDateTime {
+    fn from_cql(cql_val: CqlValue) -> Result<Self, FromCqlValError> {
+        let datetime = time_03::OffsetDateTime::from_cql(cql_val)?;
+
+        Ok(Self::new(datetime.date(), datetime.time()))
+    }
+}
+
 #[cfg(feature = "secrecy-08")]
 impl<V: FromCqlVal<CqlValue> + secrecy_08::Zeroize> FromCqlVal<CqlValue> for secrecy_08::Secret<V> {
     fn from_cql(cql_val: CqlValue) -> Result<Self, FromCqlValError> {

scylla-cql/src/frame/value.rs

@@ -608,6 +608,13 @@ impl From<time_03::OffsetDateTime> for CqlTimestamp {
     }
 }
 
+#[cfg(feature = "time-03")]
+impl From<time_03::PrimitiveDateTime> for CqlTimestamp {
+    fn from(value: time_03::PrimitiveDateTime) -> Self {
+        value.assume_utc().into()
+    }
+}
+
 #[cfg(feature = "time-03")]
 impl TryInto<time_03::OffsetDateTime> for CqlTimestamp {
     type Error = ValueOverflow;

scylla-cql/src/types/deserialize/value.rs

@@ -577,6 +577,16 @@ impl_emptiable_strict_type!(
     }
 );
 
+#[cfg(feature = "time-03")]
+impl_emptiable_strict_type!(
+    time_03::PrimitiveDateTime,
+    Timestamp,
+    |typ: &'metadata ColumnType<'metadata>, v: Option<FrameSlice<'frame>>| {
+        let time = time_03::OffsetDateTime::deserialize(typ, v)?;
+        Ok(Self::new(time.date(), time.time()))
+    }
+);
+
 // inet
 
 impl_emptiable_strict_type!(

scylla-cql/src/types/deserialize/value_tests.rs

@@ -258,6 +258,20 @@ fn test_date_time_types() {
         &time_03::OffsetDateTime::from_unix_timestamp(0xdead_cafe).unwrap(),
         &mut Bytes::new(),
     );
+
+    #[cfg(feature = "time-03")]
+    assert_ser_de_identity(
+        &ColumnType::Timestamp,
+        &time_03::PrimitiveDateTime::new(
+            time_03::OffsetDateTime::from_unix_timestamp(0xdead_cafe)
+                .unwrap()
+                .date(),
+            time_03::OffsetDateTime::from_unix_timestamp(0xdead_cafe)
+                .unwrap()
+                .time(),
+        ),
+        &mut Bytes::new(),
+    );
 }
 
 #[test]

scylla-cql/src/types/serialize/value.rs

@@ -196,6 +196,15 @@ impl SerializeValue for time_03::OffsetDateTime {
         <CqlTimestamp as SerializeValue>::serialize(&(*me).into(), typ, writer)?
     });
 }
+
+#[cfg(feature = "time-03")]
+impl SerializeValue for time_03::PrimitiveDateTime {
+    impl_serialize_via_writer!(|me, typ, writer| {
+        exact_type_check!(typ, Timestamp);
+        <CqlTimestamp as SerializeValue>::serialize(&(*me).into(), typ, writer)?
+    });
+}
+
 #[cfg(feature = "time-03")]
 impl SerializeValue for time_03::Time {
     impl_serialize_via_writer!(|me, typ, writer| {