Add table_exists for RestCatalog

pyiceberg/catalog/rest.py

@@ -719,3 +719,11 @@ def update_namespace_properties(
             updated=parsed_response.updated,
             missing=parsed_response.missing,
         )
+
+    @retry(**_RETRY_ARGS)
+    def table_exists(self, identifier: Union[str, Identifier]) -> bool:
+        identifier_tuple = self.identifier_to_tuple_without_catalog(identifier)
+        response = self._session.head(
+            self.url(Endpoints.load_table, prefixed=True, **self._split_identifier_for_path(identifier_tuple))
+        )
+        return response.status_code == 200

tests/catalog/test_rest.py

@@ -644,6 +644,26 @@ def test_load_table_404(rest_mock: Mocker) -> None:
     assert "Table does not exist" in str(e.value)
 
 
+def test_table_exist_200(rest_mock: Mocker) -> None:
+    rest_mock.head(
+        f"{TEST_URI}v1/namespaces/fokko/tables/table",
+        status_code=200,
+        request_headers=TEST_HEADERS,
+    )
+    catalog = RestCatalog("rest", uri=TEST_URI, token=TEST_TOKEN)
+    assert catalog.table_exists(("fokko", "table"))
+
+
+def test_table_exist_500(rest_mock: Mocker) -> None:
+    rest_mock.head(
+        f"{TEST_URI}v1/namespaces/fokko/tables/table",
+        status_code=500,
+        request_headers=TEST_HEADERS,
+    )
+    catalog = RestCatalog("rest", uri=TEST_URI, token=TEST_TOKEN)
+    assert not catalog.table_exists(("fokko", "table"))
+
+
 def test_drop_table_404(rest_mock: Mocker) -> None:
     rest_mock.delete(
         f"{TEST_URI}v1/namespaces/fokko/tables/does_not_exists",