feat: add explicit session setters to core client and driver

core/src/client.rs

@@ -177,13 +177,15 @@ impl APIClient {
             let password = percent_decode_str(password).decode_utf8()?;
             client.auth = Arc::new(BasicAuth::new(u.username(), password));
         }
-        let database = match u.path().trim_start_matches('/') {
-            "" => None,
-            s => Some(s.to_string()),
-        };
-        let mut role = None;
+
+        let mut session_state = SessionState::default();
+
+        let database = u.path().trim_start_matches('/');
+        if !database.is_empty() {
+            session_state.set_database(database);
+        }
+
         let mut scheme = "https";
-        let mut session_settings = BTreeMap::new();
         for (k, v) in u.query_pairs() {
             match k.as_ref() {
                 "wait_time_secs" => {
@@ -222,7 +224,7 @@ impl APIClient {
                 "warehouse" => {
                     client.warehouse = Mutex::new(Some(v.to_string()));
                 }
-                "role" => role = Some(v.to_string()),
+                "role" => session_state.set_role(v),
                 "sslmode" => match v.as_ref() {
                     "disable" => scheme = "http",
                     "require" | "enable" => scheme = "https",
@@ -273,7 +275,7 @@ impl APIClient {
                     }
                 }
                 _ => {
-                    session_settings.insert(k.to_string(), v.to_string());
+                    session_state.set(k, v);
                 }
             }
         }
@@ -286,14 +288,8 @@ impl APIClient {
             },
         };
         client.scheme = scheme.to_string();
-
         client.endpoint = Url::parse(&format!("{}://{}:{}", scheme, client.host, client.port))?;
-        client.session_state = Mutex::new(
-            SessionState::default()
-                .with_settings(Some(session_settings))
-                .with_role(role)
-                .with_database(database),
-        );
+        client.session_state = Mutex::new(session_state);
 
         Ok(client)
     }
@@ -372,6 +368,26 @@ impl APIClient {
         guard.database.clone()
     }
 
+    pub fn set_warehouse(&self, warehouse: impl Into<String>) {
+        let mut guard = self.warehouse.lock();
+        *guard = Some(warehouse.into());
+    }
+
+    pub fn set_database(&self, database: impl Into<String>) {
+        let mut guard = self.session_state.lock();
+        guard.set_database(database);
+    }
+
+    pub fn set_role(&self, role: impl Into<String>) {
+        let mut guard = self.session_state.lock();
+        guard.set_role(role);
+    }
+
+    pub fn set_session(&self, key: impl Into<String>, value: impl Into<String>) {
+        let mut guard = self.session_state.lock();
+        guard.set(key, value);
+    }
+
     pub async fn current_role(&self) -> Option<String> {
         let guard = self.session_state.lock();
         guard.role.clone()

core/src/request.rs

@@ -83,10 +83,10 @@ mod test {
 
     #[test]
     fn build_request() -> Result<()> {
+        let mut session = SessionState::default();
+        session.set_database("default");
         let req = QueryRequest::new("select 1")
-            .with_session(Some(
-                SessionState::default().with_database(Some("default".to_string())),
-            ))
+            .with_session(Some(session))
             .with_pagination(Some(PaginationConfig {
                 wait_time_secs: Some(1),
                 max_rows_in_buffer: Some(1),

core/src/session.rs

@@ -40,18 +40,16 @@ pub struct SessionState {
 }
 
 impl SessionState {
-    pub fn with_settings(mut self, settings: Option<BTreeMap<String, String>>) -> Self {
-        self.settings = settings;
-        self
+    pub fn set(&mut self, key: impl Into<String>, value: impl Into<String>) {
+        let settings = self.settings.get_or_insert_with(BTreeMap::new);
+        settings.insert(key.into(), value.into());
     }
 
-    pub fn with_database(mut self, database: Option<String>) -> Self {
-        self.database = database;
-        self
+    pub fn set_database(&mut self, database: impl Into<String>) {
+        self.database = Some(database.into());
     }
 
-    pub fn with_role(mut self, role: Option<String>) -> Self {
-        self.role = role;
-        self
+    pub fn set_role(&mut self, role: impl Into<String>) {
+        self.role = Some(role.into());
     }
 }

driver/src/client.rs

@@ -223,6 +223,22 @@ impl Connection {
         self.inner.stream_load(sql, data, method).await
     }
 
+    pub fn set_warehouse(&self, warehouse: &str) -> Result<()> {
+        self.inner.set_warehouse(warehouse)
+    }
+
+    pub fn set_database(&self, database: &str) -> Result<()> {
+        self.inner.set_database(database)
+    }
+
+    pub fn set_role(&self, role: &str) -> Result<()> {
+        self.inner.set_role(role)
+    }
+
+    pub fn set_session(&self, key: &str, value: &str) -> Result<()> {
+        self.inner.set_session(key, value)
+    }
+
     // PUT file://<path_to_file>/<filename> internalStage|externalStage
     pub async fn put_files(&self, local_file: &str, stage: &str) -> Result<RowStatsIterator> {
         self.inner.put_files(local_file, stage).await

driver/src/conn.rs

@@ -143,6 +143,14 @@ pub trait IConnection: Send + Sync {
         _method: LoadMethod,
     ) -> Result<ServerStats>;
 
+    fn set_warehouse(&self, warehouse: &str) -> Result<()>;
+
+    fn set_database(&self, database: &str) -> Result<()>;
+
+    fn set_role(&self, role: &str) -> Result<()>;
+
+    fn set_session(&self, key: &str, value: &str) -> Result<()>;
+
     // PUT file://<path_to_file>/<filename> internalStage|externalStage
     async fn put_files(&self, local_file: &str, stage: &str) -> Result<RowStatsIterator> {
         let mut total_count: usize = 0;

driver/src/flight_sql.rs

@@ -66,6 +66,30 @@ impl IConnection for FlightSQLConnection {
         None
     }
 
+    fn set_warehouse(&self, _warehouse: &str) -> Result<()> {
+        Err(Error::Protocol(
+            "set_warehouse unavailable for FlightSQL".to_string(),
+        ))
+    }
+
+    fn set_database(&self, _database: &str) -> Result<()> {
+        Err(Error::Protocol(
+            "set_database unavailable for FlightSQL".to_string(),
+        ))
+    }
+
+    fn set_role(&self, _role: &str) -> Result<()> {
+        Err(Error::Protocol(
+            "set_role unavailable for FlightSQL".to_string(),
+        ))
+    }
+
+    fn set_session(&self, _key: &str, _value: &str) -> Result<()> {
+        Err(Error::Protocol(
+            "set_session unavailable for FlightSQL".to_string(),
+        ))
+    }
+
     async fn exec(&self, sql: &str) -> Result<i64> {
         self.handshake().await?;
         let mut client = self.client.lock().await;

driver/src/rest_api.rs

@@ -138,6 +138,26 @@ impl IConnection for RestAPIConnection {
         self.client.last_query_id()
     }
 
+    fn set_warehouse(&self, warehouse: &str) -> Result<()> {
+        self.client.set_warehouse(warehouse.to_string());
+        Ok(())
+    }
+
+    fn set_database(&self, database: &str) -> Result<()> {
+        self.client.set_database(database.to_string());
+        Ok(())
+    }
+
+    fn set_role(&self, role: &str) -> Result<()> {
+        self.client.set_role(role.to_string());
+        Ok(())
+    }
+
+    fn set_session(&self, key: &str, value: &str) -> Result<()> {
+        self.client.set_session(key.to_string(), value.to_string());
+        Ok(())
+    }
+
     async fn close(&self) -> Result<()> {
         self.client.close().await;
         Ok(())

ttc/src/server.rs

@@ -18,7 +18,7 @@ use tokio::io::{AsyncReadExt, AsyncWriteExt};
 use tokio::net::{TcpListener, TcpStream};
 
 use bytes::Buf;
-use clap::{command, Parser};
+use clap::Parser;
 
 #[derive(Debug, Clone, Parser, PartialEq)]
 #[command(name = "ttc")]