diff --git a/lea/clients/base.py b/lea/clients/base.py
index 5f7ef90..0a12f28 100644
--- a/lea/clients/base.py
+++ b/lea/clients/base.py
@@ -35,7 +35,7 @@ def _view_key_to_table_reference(self, view_key: tuple[str], with_username: bool
         ...
 
     @abc.abstractmethod
-    def _table_reference_to_view_key(self, table_reference: str) -> tuple[str]:
+    def _table_reference_to_view_key(self, table_reference: str) -> tuple[str, ...]:
         ...
 
     def materialize_view(self, view: lea.views.View) -> QueryResult:
diff --git a/lea/clients/bigquery.py b/lea/clients/bigquery.py
index 23afe2d..05f53de 100644
--- a/lea/clients/bigquery.py
+++ b/lea/clients/bigquery.py
@@ -172,7 +172,8 @@ def _view_key_to_table_reference(
         >>> client = BigQuery(
         ...     credentials=None,
         ...     location="US",
-        ...     project_id="project",
+        ...     compute_project_id="compute",
+        ...     write_project_id="write",
         ...     dataset_name="dataset",
         ...     username="max",
         ...     wap_mode=False
@@ -188,7 +189,7 @@ def _view_key_to_table_reference(
         'dataset.schema__table'
 
         >>> client._view_key_to_table_reference(("schema", "table"), with_context=True)
-        '`project`.dataset_max.schema__table'
+        '`write`.dataset_max.schema__table'
 
         """
         table_reference = f"{self._dataset_name}.{lea._SEP.join(view_key)}"
@@ -203,13 +204,14 @@ def _view_key_to_table_reference(
             table_reference = f"{self.write_project_id}.{table_reference}"
         return table_reference
 
-    def _table_reference_to_view_key(self, table_reference: str) -> tuple[str]:
+    def _table_reference_to_view_key(self, table_reference: str) -> tuple[str, ...]:
         """
 
         >>> client = BigQuery(
         ...     credentials=None,
         ...     location="US",
-        ...     project_id="project",
+        ...     compute_project_id="compute",
+        ...     write_project_id="write",
         ...     dataset_name="dataset",
         ...     username="max",
         ...     wap_mode=False
diff --git a/lea/clients/duckdb.py b/lea/clients/duckdb.py
index e9b2f5d..fd1e038 100644
--- a/lea/clients/duckdb.py
+++ b/lea/clients/duckdb.py
@@ -20,16 +20,20 @@ class DuckDB(Client):
     def __init__(self, path: str, username: str | None = None, wap_mode: bool = False):
         import duckdb
 
+        path_ = pathlib.Path(path)
         if path.startswith("md:"):
-            path = f"{path}_{username}" if username is not None else path
-        else:
-            path = pathlib.Path(path)
-            if username is not None:
-                path = (path.parent / f"{path.stem}_{username}{path.suffix}").absolute()
-        self.path = path
+            path_ = pathlib.Path(f"{path}_{username}" if username is not None else path)
+        elif username is not None:
+            path_ = pathlib.Path(path)
+            path_ = path_.parent / f"{path_.stem}_{username}{path_.suffix}"
+        self.path_ = path_
         self.username = username
         self.wap_mode = wap_mode
-        self.con = duckdb.connect(str(self.path))
+        self.con = (
+            duckdb.connect(":memory:")
+            if path == ":memory:"
+            else duckdb.connect(str(self.path_.absolute()))
+        )
 
     @property
     def sqlglot_dialect(self):
@@ -73,7 +77,7 @@ def list_tables(self) -> pd.DataFrame:
         return self.read_sql(
             f"""
         SELECT
-            '{self.path.stem}' || '.' || schema_name || '.' || table_name AS table_reference,
+            '{self.path_.stem}' || '.' || schema_name || '.' || table_name AS table_reference,
             estimated_size AS n_rows,  -- TODO: Figure out how to get the exact number
             estimated_size AS n_bytes  -- TODO: Figure out how to get this
         FROM duckdb_tables()
@@ -84,14 +88,16 @@ def list_columns(self) -> pd.DataFrame:
         return self.read_sql(
             f"""
         SELECT
-            '{self.path.stem}' || '.' || table_schema || '.' || table_name AS table_reference,
+            '{self.path_.stem}' || '.' || table_schema || '.' || table_name AS table_reference,
             column_name AS column,
             data_type AS type
         FROM information_schema.columns
         """
         )
 
-    def _view_key_to_table_reference(self, view_key: tuple[str], with_context: bool) -> str:
+    def _view_key_to_table_reference(
+        self, view_key: tuple[str], with_context: bool, with_project_id=False
+    ) -> str:
         """
 
         >>> client = DuckDB(path=":memory:", username=None)
@@ -103,16 +109,17 @@ def _view_key_to_table_reference(self, view_key: tuple[str], with_context: bool)
         'schema.subschema__table'
 
         """
+        leftover: list[str] = []
         schema, *leftover = view_key
         table_reference = f"{schema}.{lea._SEP.join(leftover)}"
         if with_context:
             if self.username:
-                table_reference = f"{self.path.stem}.{table_reference}"
+                table_reference = f"{self.path_.stem}.{table_reference}"
             if self.wap_mode:
                 table_reference = f"{table_reference}{lea._SEP}{lea._WAP_MODE_SUFFIX}"
         return table_reference
 
-    def _table_reference_to_view_key(self, table_reference: str) -> tuple[str]:
+    def _table_reference_to_view_key(self, table_reference: str) -> tuple[str, ...]:
         """
 
         >>> client = DuckDB(path=":memory:", username=None)
@@ -125,7 +132,7 @@ def _table_reference_to_view_key(self, table_reference: str) -> tuple[str]:
 
         """
         database, leftover = table_reference.split(".", 1)
-        if database == self.path.stem:
+        if database == self.path_.stem:
             schema, leftover = leftover.split(".", 1)
         else:
             schema = database
diff --git a/lea/runner.py b/lea/runner.py
index 9d3288a..0e5243c 100644
--- a/lea/runner.py
+++ b/lea/runner.py
@@ -233,7 +233,7 @@ def _make_table_reference_mapping(
             for view_key in self.regular_views
         }
 
-        return table_reference_mapping
+        return {k: v for k, v in table_reference_mapping.items() if v != k}
 
     def prepare(self):
         self.client.prepare(self.regular_views.values())
diff --git a/lea/views/test_sql.py b/lea/views/test_sql.py
index c38b02a..e5874a7 100644
--- a/lea/views/test_sql.py
+++ b/lea/views/test_sql.py
@@ -19,7 +19,8 @@
                 lea.clients.BigQuery(
                     credentials=None,
                     location=None,
-                    project_id=None,
+                    compute_project_id=None,
+                    write_project_id=None,
                     dataset_name="dataset",
                     username="max",
                     wap_mode=False,