wip datetimeparts fixes

Signed-off-by: Joe Isaacs <[email protected]>

Author: joseph-isaacs

vortex-duckdb/src/convert/scalar.rs

@@ -201,8 +201,11 @@ impl ToDuckDBScalar for ExtScalar<'_> {
                 _ => vortex_bail!("cannot have TimeUnit {unit}, so represent a day"),
             },
             TemporalMetadata::Timestamp(unit, tz) => {
-                if tz.is_some() {
-                    todo!("timezones to duckdb scalar")
+                if let Some(tz) = tz {
+                    if tz != "UTC" {
+                        todo!()
+                    }
+                    return Ok(Value::new_timestamp_tz(value()?));
                 }
                 match unit {
                     TimeUnit::Nanoseconds => Ok(Value::new_timestamp_ns(value()?)),

vortex-duckdb/src/duckdb/value.rs

@@ -197,6 +197,14 @@ impl Value {
         }
     }
 
+    pub fn new_timestamp_tz(micros: i64) -> Self {
+        unsafe {
+            Self::own(cpp::duckdb_create_timestamp_tz(cpp::duckdb_timestamp {
+                micros,
+            }))
+        }
+    }
+
     pub fn new_timestamp_ns(nanos: i64) -> Self {
         unsafe {
             Self::own(cpp::duckdb_create_timestamp_ns(cpp::duckdb_timestamp_ns {