timsaucer commented on code in PR #23842: URL: https://github.com/apache/datafusion/pull/23842#discussion_r3683905737
########## datafusion/session/src/physical_optimizer.rs: ########## @@ -0,0 +1,73 @@ +// 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. + +//! Physical optimizer interfaces. + +use std::fmt::Debug; +use std::sync::Arc; + +use datafusion_common::Result; +use datafusion_common::config::ConfigOptions; +use datafusion_physical_plan::ExecutionPlan; +use datafusion_physical_plan::operator_statistics::StatisticsRegistry; + +/// Context available to physical optimizer rules. +/// +/// This trait provides access to configuration options and an optional statistics +/// registry for enhanced statistics lookup. +pub trait PhysicalOptimizerContext: Send + Sync { + /// Returns the configuration options. + fn config_options(&self) -> &ConfigOptions; + + /// Returns the statistics registry for enhanced statistics lookup. + /// + /// Returns `None` if no registry is configured, in which case rules + /// should fall back to using [`ExecutionPlan::partition_statistics`]. + fn statistics_registry(&self) -> Option<&StatisticsRegistry> { + None + } +} + +/// Transforms one [`ExecutionPlan`] into another that computes the same results, +/// but may do so more efficiently. +pub trait PhysicalOptimizerRule: Debug + std::any::Any { Review Comment: Updated -- 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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
