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38 lines
885 B
C++
38 lines
885 B
C++
#pragma once
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#include <Core/Block.h>
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#include <Storages/IStorage_fwd.h>
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namespace DB
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{
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class QueryPlan;
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class Set;
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using SetPtr = std::shared_ptr<Set>;
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/// Information on what to do when executing a subquery in the [GLOBAL] IN/JOIN section.
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struct SubqueryForSet
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{
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SubqueryForSet();
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~SubqueryForSet();
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SubqueryForSet(SubqueryForSet &&) noexcept;
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SubqueryForSet & operator=(SubqueryForSet &&) noexcept;
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/// The source is obtained using the InterpreterSelectQuery subquery.
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std::unique_ptr<QueryPlan> source;
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/// If set, build it from result.
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SetPtr set;
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/// If set, put the result into the table.
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/// This is a temporary table for transferring to remote servers for distributed query processing.
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StoragePtr table;
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};
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/// ID of subquery -> what to do with it.
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using SubqueriesForSets = std::unordered_map<String, SubqueryForSet>;
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}
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