try send null type

Author: rekby

ydb/src/client_table_test_integration.rs

@@ -7,6 +7,7 @@ use crate::transaction::Mode;
 use crate::transaction::Mode::SerializableReadWrite;
 use crate::transaction::Transaction;
 use crate::types::{Value, ValueList, ValueStruct};
+use crate::ydb_params;
 use async_once::AsyncOnce;
 use lazy_static::lazy_static;
 use std::collections::HashMap;
@@ -335,6 +336,40 @@ SELECT $test AS test;
     return Ok(());
 }
 
+#[tokio::test]
+#[traced_test]
+// #[ignore]
+async fn send_null_value_as_nullable_param() -> YdbResult<()> {
+    let client = create_client().await?;
+    let table_client = client.table_client();
+    let res: Option<i32> = table_client
+        .retry_transaction(|tx| async {
+            let mut tx = tx;
+            let param = Value::Null;
+
+            let res = tx
+                .query(
+                    Query::from(
+                        "
+            DECLARE $res AS Int32?;
+            
+            SELECT $res AS res;
+        ",
+                    )
+                    .with_params(ydb_params!("$res" => param)),
+                )
+                .await?;
+            let mut row = res.into_only_row()?;
+            return Ok(row.remove_field_by_name("res")?);
+        })
+        .await?
+        .try_into()?;
+
+    assert_eq!(None, res);
+
+    return Ok(());
+}
+
 #[tokio::test]
 #[traced_test]
 #[ignore] // need YDB access

ydb/src/session.rs

@@ -122,6 +122,7 @@ impl Session {
         debug!("request: {}", serde_json::to_string(&req)?);
 
         let mut channel = self.get_channel().await?;
+        // trace!("execute data query: '{:?}'", req);
         let response = channel.execute_data_query(req).await?;
         let operation_result: ExecuteQueryResult = self.handle_operation_result(response)?;
 

ydb/src/types.rs

@@ -59,6 +59,7 @@ const SECONDS_PER_DAY: u64 = 60 * 60 * 24;
 #[non_exhaustive]
 pub enum Value {
     Void,
+    Null,
     Bool(bool),
     Int8(i8),
     Uint8(u8),
@@ -280,6 +281,7 @@ impl Value {
                     _ => unimplemented!("{:?} ({})", P::from_i32(*t_id), *t_id),
                 },
                 T::VoidType(_) => Value::Void,
+                T::NullType(_) => Value::Null,
                 T::OptionalType(val) => {
                     let t = if let Some(item) = &val.item {
                         Some(*item.clone())
@@ -319,6 +321,7 @@ impl Value {
     pub(crate) fn from_proto(t: &Value, proto_value: ydb_proto::Value) -> YdbResult<Self> {
         let res = match (t, proto_value) {
             (Value::Void, _) => Value::Void,
+            (Value::Null, _) => Value::Null,
             (
                 t,
                 ydb_proto::Value {
@@ -461,6 +464,21 @@ impl Value {
                     ..ydb_proto::Value::default()
                 }),
             },
+            Self::Null => ydb_proto::TypedValue {
+                r#type: Some(ydb_proto::Type {
+                    r#type: Some(ydb_proto::r#type::Type::NullType(
+                        prost_types::NullValue::NullValue.into(),
+                    )),
+                    ..ydb_proto::Type::default()
+                }),
+                value: Some(ydb_proto::Value {
+                    value: Some(ydb_proto::value::Value::NullFlagValue(
+                        prost_types::NullValue::NullValue.into(),
+                    )),
+                    ..ydb_proto::Value::default()
+                }),
+                ..ydb_proto::TypedValue::default()
+            },
             Self::Bool(val) => proto_typed_value(pt::Bool, pv::BoolValue(val)),
             Self::Int8(val) => proto_typed_value(pt::Int8, pv::Int32Value(val.into())),
             Self::Uint8(val) => proto_typed_value(pt::Uint8, pv::Uint32Value(val.into())),
@@ -627,6 +645,7 @@ mod test {
         num_tests!(values, Value::Double, f64);
 
         values.push(Value::Void);
+        values.push(Value::Null);
 
         values.push(Value::Date(std::time::Duration::from_secs(1633996800))); //Tue Oct 12 00:00:00 UTC 2021
         values.push(Value::DateTime(std::time::Duration::from_secs(1634000523))); //Tue Oct 12 01:02:03 UTC 2021