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31 lines
665 B
C++
31 lines
665 B
C++
#pragma once
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#include <Parsers/IAST_fwd.h>
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namespace DB
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{
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class ASTSelectQuery;
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struct StorageInMemoryMetadata;
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using StorageMetadataPtr = std::shared_ptr<const StorageInMemoryMetadata>;
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/// Optimizer that can remove useless parts of conditions
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/// in WHERE clause according to table constraints.
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class WhereConstraintsOptimizer final
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{
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public:
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WhereConstraintsOptimizer(
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ASTSelectQuery * select_query,
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const StorageMetadataPtr & metadata_snapshot,
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bool optimize_append_index_);
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void perform();
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private:
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ASTSelectQuery * select_query;
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const StorageMetadataPtr & metadata_snapshot;
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bool optimize_append_index;
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};
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}
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