maint: let requests handle params formatting

pyiceberg/catalog/rest/__init__.py

@@ -14,6 +14,7 @@
 #  KIND, either express or implied.  See the License for the
 #  specific language governing permissions and limitations
 #  under the License.
+import re
 from enum import Enum
 from typing import (
     TYPE_CHECKING,
@@ -82,6 +83,9 @@
 ICEBERG_REST_SPEC_VERSION = "0.14.1"
 
 
+CAMEL_TO_SNAKE_CASE_PATTERN = re.compile(r"(?<!^)(?=[A-Z])")
+
+
 class Endpoints:
     get_config: str = "config"
     list_namespaces: str = "namespaces"
@@ -104,6 +108,30 @@ class Endpoints:
     view_exists: str = "namespaces/{namespace}/views/{view}"
 
 
+ENDPOINT_PARAMS_MAP: dict[str, tuple[str]] = {
+    Endpoints.drop_table: ("purgeRequested",),
+}
+
+
+def _get_endpoint_params(endpoint: str, **kwargs: Any) -> dict[str, Any] | None:
+    """Get the query parameters for the endpoint."""
+    if not kwargs or endpoint not in ENDPOINT_PARAMS_MAP:
+        return None
+
+    snake_case_query_params = {
+        param: CAMEL_TO_SNAKE_CASE_PATTERN.sub("_", param).lower() for param in ENDPOINT_PARAMS_MAP[endpoint]
+    }
+
+    _params = {}
+    for camel, snake in snake_case_query_params.items():
+        if snake in kwargs:
+            if kwargs[snake] is None:
+                continue
+            _params[camel] = kwargs[snake]
+
+    return _params
+
+
 class IdentifierKind(Enum):
     TABLE = "table"
     VIEW = "view"
@@ -616,8 +644,9 @@ def load_table(self, identifier: Union[str, Identifier]) -> Table:
 
     @retry(**_RETRY_ARGS)
     def drop_table(self, identifier: Union[str, Identifier], purge_requested: bool = False) -> None:
+        params = _get_endpoint_params(Endpoints.drop_table, purge_requested=purge_requested)
         response = self._session.delete(
-            self.url(Endpoints.drop_table, prefixed=True, purge=purge_requested, **self._split_identifier_for_path(identifier)),
+            self.url(Endpoints.drop_table, prefixed=True, **self._split_identifier_for_path(identifier)), params=params
         )
         try:
             response.raise_for_status()

tests/catalog/test_rest.py

@@ -24,7 +24,7 @@
 
 import pyiceberg
 from pyiceberg.catalog import PropertiesUpdateSummary, load_catalog
-from pyiceberg.catalog.rest import OAUTH2_SERVER_URI, SNAPSHOT_LOADING_MODE, RestCatalog
+from pyiceberg.catalog.rest import OAUTH2_SERVER_URI, SNAPSHOT_LOADING_MODE, Endpoints, RestCatalog, _get_endpoint_params
 from pyiceberg.exceptions import (
     AuthorizationExpiredError,
     NamespaceAlreadyExistsError,
@@ -1621,3 +1621,15 @@ def test_drop_view_204(rest_mock: Mocker) -> None:
         request_headers=TEST_HEADERS,
     )
     RestCatalog("rest", uri=TEST_URI, token=TEST_TOKEN).drop_view(("some_namespace", "some_view"))
+
+
+def test_get_endpoint_params() -> None:
+    params = _get_endpoint_params(Endpoints.drop_table, purge_requested=True)
+    assert params == {
+        "purgeRequested": True,
+    }
+
+
+def test_get_endpoint_with_no_params() -> None:
+    params = _get_endpoint_params(Endpoints.namespace_exists, purge_requested=True)
+    assert params is None