2017-07-15 04:06:51 +00:00
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#pragma once
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#include <memory>
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2017-07-24 12:58:01 +00:00
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#include <unordered_map>
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2017-07-15 04:06:51 +00:00
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namespace DB
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{
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class IAST;
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using ASTPtr = std::shared_ptr<IAST>;
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class Set;
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using SetPtr = std::shared_ptr<Set>;
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/// Information about calculated sets in right hand side of IN.
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using PreparedSets = std::unordered_map<IAST*, SetPtr>;
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/** Query along with some additional data,
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* that can be used during query processing
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* inside storage engines.
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*/
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struct SelectQueryInfo
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{
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ASTPtr query;
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/// Prepared sets are used for indices by storage engine.
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/// Example: x IN (1, 2, 3)
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PreparedSets sets;
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};
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}
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