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116 changes: 116 additions & 0 deletions
116
datafusion/core/src/physical_optimizer/join_filter_pushdown.rs
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| // 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. | ||
|
|
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| //! Pushdown the dynamic join filters down to scan execution if there is any | ||
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| use std::sync::Arc; | ||
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| use crate::datasource::physical_plan::ParquetExec; | ||
| use crate::physical_plan::ExecutionPlan; | ||
| use crate::{config::ConfigOptions, error::Result, physical_plan::joins::HashJoinExec}; | ||
| use datafusion_common::tree_node::{Transformed, TransformedResult}; | ||
| use datafusion_physical_optimizer::PhysicalOptimizerRule; | ||
| use datafusion_physical_plan::joins::DynamicFilterInfo; | ||
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| /// this rule used for pushing the build side statistic down to probe phase | ||
| #[derive(Default, Debug)] | ||
| pub struct JoinFilterPushdown {} | ||
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| impl JoinFilterPushdown { | ||
| #[allow(missing_docs)] | ||
| pub fn new() -> Self { | ||
| Self {} | ||
| } | ||
| } | ||
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| impl PhysicalOptimizerRule for JoinFilterPushdown { | ||
| fn optimize( | ||
| &self, | ||
| plan: Arc<dyn ExecutionPlan>, | ||
| config: &ConfigOptions, | ||
| ) -> Result<Arc<dyn ExecutionPlan>> { | ||
| if !config.optimizer.dynamic_join_pushdown { | ||
| return Ok(plan); | ||
| } | ||
| optimize_impl(plan, &mut None).data() | ||
| } | ||
|
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| fn name(&self) -> &str { | ||
| "JoinFilterPushdown" | ||
| } | ||
|
|
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| fn schema_check(&self) -> bool { | ||
| true | ||
| } | ||
| } | ||
|
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| fn optimize_impl( | ||
| plan: Arc<dyn ExecutionPlan>, | ||
| join_filters: &mut Option<Arc<DynamicFilterInfo>>, | ||
| ) -> Result<Transformed<Arc<dyn ExecutionPlan>>> { | ||
| if let Some(hashjoin_exec) = plan.as_any().downcast_ref::<HashJoinExec>() { | ||
| join_filters.clone_from(&hashjoin_exec.dynamic_filters_pushdown); | ||
| let new_right = optimize_impl(hashjoin_exec.right.clone(), join_filters)?; | ||
| if new_right.transformed { | ||
| let new_hash_join = HashJoinExec::try_new( | ||
| hashjoin_exec.left().clone(), | ||
| new_right.data, | ||
| hashjoin_exec.on.clone(), | ||
| hashjoin_exec.filter().cloned(), | ||
| hashjoin_exec.join_type(), | ||
| hashjoin_exec.projection.clone(), | ||
| *hashjoin_exec.partition_mode(), | ||
| hashjoin_exec.null_equals_null(), | ||
| )? | ||
| .with_dynamic_filter(hashjoin_exec.dynamic_filters_pushdown.clone())? | ||
| .map_or(plan, |f| f); | ||
| return Ok(Transformed::yes(new_hash_join)); | ||
| } | ||
| Ok(Transformed::no(plan)) | ||
| } else if let Some(parquet_exec) = plan.as_any().downcast_ref::<ParquetExec>() { | ||
| if let Some(dynamic_filters) = join_filters { | ||
| let final_exec = parquet_exec | ||
| .clone() | ||
| .with_dynamic_filter(Some(dynamic_filters.clone()))?; | ||
| if let Some(plan) = final_exec { | ||
| return Ok(Transformed::yes(plan)); | ||
| } else { | ||
| return Ok(Transformed::no(plan)); | ||
| } | ||
| } | ||
| Ok(Transformed::no(plan)) | ||
| } else { | ||
| let children = plan.children(); | ||
| let mut new_children = Vec::with_capacity(children.len()); | ||
| let mut transformed = false; | ||
|
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| for child in children { | ||
| let new_child = optimize_impl(child.clone(), join_filters)?; | ||
| if new_child.transformed { | ||
| transformed = true; | ||
| } | ||
| new_children.push(new_child.data); | ||
| } | ||
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| if transformed { | ||
| let new_plan = plan.with_new_children(new_children)?; | ||
| Ok(Transformed::yes(new_plan)) | ||
| } else { | ||
| Ok(Transformed::no(plan)) | ||
| } | ||
| } | ||
| } |
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