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84 lines
2.1 KiB
C++
84 lines
2.1 KiB
C++
#pragma once
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#include <Storages/MergeTree/MergeTreeIndices.h>
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#include <Storages/MergeTree/MergeTreeData.h>
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#include <memory>
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namespace DB
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{
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class MergeTreeIndexHyposesis;
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class MergeTreeIndexGranuleHypothesis : public IMergeTreeIndexGranule
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{
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public:
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explicit MergeTreeIndexGranuleHypothesis(
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const String & index_name_);
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MergeTreeIndexGranuleHypothesis(
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const String & index_name_,
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bool met_);
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void serializeBinary(WriteBuffer & ostr) const override;
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void deserializeBinary(ReadBuffer & istr, MergeTreeIndexVersion version) override;
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bool empty() const override { return is_empty; }
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~MergeTreeIndexGranuleHypothesis() override = default;
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const String & index_name;
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bool is_empty = true;
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bool met = true;
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};
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class MergeTreeIndexAggregatorHypothesis : public IMergeTreeIndexAggregator
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{
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public:
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explicit MergeTreeIndexAggregatorHypothesis(
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const String & index_name_, const String & column_name_);
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~MergeTreeIndexAggregatorHypothesis() override = default;
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bool empty() const override { return is_empty; }
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MergeTreeIndexGranulePtr getGranuleAndReset() override;
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void update(const Block & block, size_t * pos, size_t limit) override;
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private:
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const String & index_name;
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String column_name;
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bool met = true;
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bool is_empty = true;
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};
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class MergeTreeIndexHypothesis : public IMergeTreeIndex
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{
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public:
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explicit MergeTreeIndexHypothesis(
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const IndexDescription & index_)
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: IMergeTreeIndex(index_)
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{}
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~MergeTreeIndexHypothesis() override = default;
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bool isMergeable() const override { return true; }
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MergeTreeIndexGranulePtr createIndexGranule() const override;
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MergeTreeIndexAggregatorPtr createIndexAggregator() const override;
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MergeTreeIndexConditionPtr createIndexCondition(
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const SelectQueryInfo & query, ContextPtr context) const override;
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MergeTreeIndexMergedConditionPtr createIndexMergedCondition(
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const SelectQueryInfo & query_info, StorageMetadataPtr storage_metadata) const override;
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bool mayBenefitFromIndexForIn(const ASTPtr & node) const override;
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size_t max_rows = 0;
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};
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}
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