alamb commented on a change in pull request #9762: URL: https://github.com/apache/arrow/pull/9762#discussion_r599086894
########## File path: rust/datafusion/src/catalog/catalog.rs ########## @@ -0,0 +1,78 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +//! Describes the interface and built-in implementations of catalogs, +//! representing collections of named schemas. + +use crate::catalog::schema::SchemaProvider; +use std::any::Any; +use std::collections::HashMap; +use std::sync::{Arc, RwLock}; + +/// Represents a catalog, comprising a number of named schemas. +pub trait CatalogProvider: Sync + Send { + /// Returns the catalog provider as [`Any`](std::any::Any) + /// so that it can be downcast to a specific implementation. + fn as_any(&self) -> &dyn Any; + + /// Retrieves the list of available schema names in this catalog. + fn schema_names(&self) -> Vec<String>; Review comment: Vec<&str> might be possible -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
