fix file catalog

Author: Jan Kaul

catalogs/iceberg-file-catalog/src/lib.rs

@@ -74,7 +74,7 @@ impl Catalog for FileCatalog {
         _namespace: &Namespace,
         _properties: Option<HashMap<String, String>>,
     ) -> Result<HashMap<String, String>, IcebergError> {
-        todo!()
+        Ok(HashMap::new())
     }
     /// Drop a namespace in the catalog
     async fn drop_namespace(&self, _namespace: &Namespace) -> Result<(), IcebergError> {
@@ -743,6 +743,19 @@ pub mod tests {
 
         ctx.register_catalog("warehouse", catalog);
 
+        let sql = &"CREATE SCHEMA warehouse.tpch;".to_string();
+
+        let plan = ctx.state().create_logical_plan(sql).await.unwrap();
+
+        let transformed = plan.transform(iceberg_transform).data().unwrap();
+
+        ctx.execute_logical_plan(transformed)
+            .await
+            .unwrap()
+            .collect()
+            .await
+            .expect("Failed to execute query plan.");
+
         let sql = "CREATE EXTERNAL TABLE lineitem ( 
     L_ORDERKEY BIGINT NOT NULL, 
     L_PARTKEY BIGINT NOT NULL,