added error msg to SaaS APIs (#852)

1. improved error msg for SaaS create_table and create_index

---------

Co-authored-by: Chang She <759245+changhiskhan@users.noreply.github.com>

python/lancedb/remote/db.py

@@ -118,6 +118,7 @@ class RemoteDBConnection(DBConnection):
         schema: Optional[Union[pa.Schema, LanceModel]] = None,
         on_bad_vectors: str = "error",
         fill_value: float = 0.0,
+        mode: Optional[str] = None,
         embedding_functions: Optional[List[EmbeddingFunctionConfig]] = None,
     ) -> Table:
         """Create a [Table][lancedb.table.Table] in the database.
@@ -215,11 +216,13 @@ class RemoteDBConnection(DBConnection):
         if data is None and schema is None:
             raise ValueError("Either data or schema must be provided.")
         if embedding_functions is not None:
-            raise NotImplementedError(
-                "embedding_functions is not supported for remote databases."
+            logging.warning(
+                "embedding_functions is not yet supported on LanceDB Cloud."
                 "Please vote https://github.com/lancedb/lancedb/issues/626 "
                 "for this feature."
             )
+        if mode is not None:
+            logging.warning("mode is not yet supported on LanceDB Cloud.")
 
         if inspect.isclass(schema) and issubclass(schema, LanceModel):
             # convert LanceModel to pyarrow schema

python/lancedb/remote/table.py

@@ -11,6 +11,7 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
+import logging
 import uuid
 from functools import cached_property
 from typing import Dict, Optional, Union
@@ -57,17 +58,17 @@ class RemoteTable(Table):
         return resp["version"]
 
     def to_arrow(self) -> pa.Table:
-        """to_arrow() is not supported on the LanceDB cloud"""
-        raise NotImplementedError("to_arrow() is not supported on the LanceDB cloud")
+        """to_arrow() is not yet supported on LanceDB cloud."""
+        raise NotImplementedError("to_arrow() is not yet supported on LanceDB cloud.")
 
     def to_pandas(self):
-        """to_pandas() is not supported on the LanceDB cloud"""
-        return NotImplementedError("to_pandas() is not supported on the LanceDB cloud")
+        """to_pandas() is not yet supported on LanceDB cloud."""
+        return NotImplementedError("to_pandas() is not yet supported on LanceDB cloud.")
 
     def create_scalar_index(self, *args, **kwargs):
         """Creates a scalar index"""
         return NotImplementedError(
-            "create_scalar_index() is not supported on the LanceDB cloud"
+            "create_scalar_index() is not yet supported on LanceDB cloud."
         )
 
     def create_index(
@@ -75,6 +76,10 @@ class RemoteTable(Table):
         metric="L2",
         vector_column_name: str = VECTOR_COLUMN_NAME,
         index_cache_size: Optional[int] = None,
+        num_partitions: Optional[int] = None,
+        num_sub_vectors: Optional[int] = None,
+        replace: Optional[bool] = None,
+        accelerator: Optional[str] = None,
     ):
         """Create an index on the table.
         Currently, the only parameters that matter are
@@ -108,6 +113,28 @@ class RemoteTable(Table):
         ... )
         >>> table.create_index("L2", "vector") # doctest: +SKIP
         """
+
+        if num_partitions is not None:
+            logging.warning(
+                "num_partitions is not supported on LanceDB cloud."
+                "This parameter will be tuned automatically."
+            )
+        if num_sub_vectors is not None:
+            logging.warning(
+                "num_sub_vectors is not supported on LanceDB cloud."
+                "This parameter will be tuned automatically."
+            )
+        if accelerator is not None:
+            logging.warning(
+                "GPU accelerator is not yet supported on LanceDB cloud."
+                "If you have 100M+ vectors to index,"
+                "please contact us at contact@lancedb.com"
+            )
+        if replace is not None:
+            logging.warning(
+                "replace is not supported on LanceDB cloud."
+                "Existing indexes will always be replaced."
+            )
         index_type = "vector"
 
         data = {