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41 lines
1.4 KiB
C++
41 lines
1.4 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 <Interpreters/ComparisonGraph.h>
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namespace DB
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{
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/// MergedCondition for Indexhypothesis.
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class MergeTreeIndexhypothesisMergedCondition : public IMergeTreeIndexMergedCondition
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{
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public:
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MergeTreeIndexhypothesisMergedCondition(
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const SelectQueryInfo & query, const ConstraintsDescription & constraints, size_t granularity_);
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void addIndex(const MergeTreeIndexPtr & index) override;
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bool alwaysUnknownOrTrue() const override;
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bool mayBeTrueOnGranule(const MergeTreeIndexGranules & granules) const override;
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private:
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void addConstraints(const ConstraintsDescription & constraints_description);
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std::unique_ptr<ComparisonGraph> buildGraph(const std::vector<bool> & values) const;
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const ComparisonGraph * getGraph(const std::vector<bool> & values) const;
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ASTPtr expression_ast;
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std::unique_ptr<CNFQuery> expression_cnf;
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/// Part analysis can be done in parallel.
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/// So, we have shared answer and graph cache.
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mutable std::mutex cache_mutex;
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mutable std::unordered_map<std::vector<bool>, std::unique_ptr<ComparisonGraph>> graph_cache;
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mutable std::unordered_map<std::vector<bool>, bool> answer_cache;
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std::vector<std::vector<ASTPtr>> index_to_compare_atomic_hypotheses;
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std::vector<std::vector<CNFQuery::OrGroup>> index_to_atomic_hypotheses;
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std::vector<ASTPtr> atomic_constraints;
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};
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}
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