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refactor: integrate segment pruning into pipeline (#17126)
* refactor: integrate segment pruning into pipeline * chore: fix unit test and clean code
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43 changes: 43 additions & 0 deletions
43
src/query/storages/fuse/src/pruning_pipeline/lazy_segment_meta.rs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| // Copyright 2021 Datafuse Labs | ||
| // | ||
| // Licensed 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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| use std::fmt::Debug; | ||
| use std::fmt::Formatter; | ||
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| use databend_common_expression::local_block_meta_serde; | ||
| use databend_common_expression::BlockMetaInfo; | ||
| use databend_common_expression::BlockMetaInfoPtr; | ||
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| use crate::SegmentLocation; | ||
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| pub struct LazySegmentMeta { | ||
| pub segment_location: SegmentLocation, | ||
| } | ||
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| impl LazySegmentMeta { | ||
| pub fn create(segment_location: SegmentLocation) -> BlockMetaInfoPtr { | ||
| Box::new(LazySegmentMeta { segment_location }) | ||
| } | ||
| } | ||
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| impl Debug for LazySegmentMeta { | ||
| fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result { | ||
| f.debug_struct("LazySegmentMeta").finish() | ||
| } | ||
| } | ||
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| local_block_meta_serde!(LazySegmentMeta); | ||
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| #[typetag::serde(name = "lazy_segment_meta")] | ||
| impl BlockMetaInfo for LazySegmentMeta {} |
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86 changes: 86 additions & 0 deletions
86
src/query/storages/fuse/src/pruning_pipeline/segment_prune_transform.rs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| // Copyright 2021 Datafuse Labs | ||
| // | ||
| // Licensed 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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| use std::sync::Arc; | ||
|
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| use databend_common_exception::ErrorCode; | ||
| use databend_common_exception::Result; | ||
| use databend_common_expression::BlockMetaInfoDowncast; | ||
| use databend_common_expression::DataBlock; | ||
| use databend_common_expression::SEGMENT_NAME_COL_NAME; | ||
| use databend_common_pipeline_core::processors::InputPort; | ||
| use databend_common_pipeline_core::processors::OutputPort; | ||
| use databend_common_pipeline_core::processors::ProcessorPtr; | ||
| use databend_common_pipeline_transforms::AsyncAccumulatingTransform; | ||
| use databend_common_pipeline_transforms::AsyncAccumulatingTransformer; | ||
|
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| use crate::pruning::PruningContext; | ||
| use crate::pruning::SegmentPruner; | ||
| use crate::pruning_pipeline::pruned_segment_meta::PrunedSegmentMeta; | ||
| use crate::pruning_pipeline::LazySegmentMeta; | ||
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| pub struct SegmentPruneTransform { | ||
| pub segment_pruner: Arc<SegmentPruner>, | ||
| pub pruning_ctx: Arc<PruningContext>, | ||
| } | ||
|
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| impl SegmentPruneTransform { | ||
| pub fn create( | ||
| input: Arc<InputPort>, | ||
| output: Arc<OutputPort>, | ||
| segment_pruner: Arc<SegmentPruner>, | ||
| pruning_context: Arc<PruningContext>, | ||
| ) -> Result<ProcessorPtr> { | ||
| Ok(ProcessorPtr::create(AsyncAccumulatingTransformer::create( | ||
| input, | ||
| output, | ||
| SegmentPruneTransform { | ||
| segment_pruner, | ||
| pruning_ctx: pruning_context, | ||
| }, | ||
| ))) | ||
| } | ||
| } | ||
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| #[async_trait::async_trait] | ||
| impl AsyncAccumulatingTransform for SegmentPruneTransform { | ||
| const NAME: &'static str = "SegmentPruneTransform"; | ||
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| async fn transform(&mut self, mut data: DataBlock) -> Result<Option<DataBlock>> { | ||
| if let Some(ptr) = data.take_meta() { | ||
| if let Some(meta) = LazySegmentMeta::downcast_from(ptr) { | ||
| let location = meta.segment_location; | ||
| if let Some(pruner) = &self.pruning_ctx.internal_column_pruner { | ||
| if !pruner.should_keep(SEGMENT_NAME_COL_NAME, &location.location.0) { | ||
| return Ok(None); | ||
| } | ||
| } | ||
| let mut pruned_segments = self.segment_pruner.pruning(vec![location]).await?; | ||
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| if pruned_segments.is_empty() { | ||
| return Ok(None); | ||
| } | ||
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| debug_assert!(pruned_segments.len() == 1); | ||
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| return Ok(Some(DataBlock::empty_with_meta(PrunedSegmentMeta::create( | ||
| pruned_segments.pop().unwrap(), | ||
| )))); | ||
| } | ||
| } | ||
| Err(ErrorCode::Internal( | ||
| "Cannot downcast meta to LazySegmentMeta", | ||
| )) | ||
| } | ||
| } |