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70d1adfe4b
* save format string for NetException * format exceptions * format exceptions 2 * format exceptions 3 * format exceptions 4 * format exceptions 5 * format exceptions 6 * fix * format exceptions 7 * format exceptions 8 * Update MergeTreeIndexGin.cpp * Update AggregateFunctionMap.cpp * Update AggregateFunctionMap.cpp * fix
55 lines
1.2 KiB
C++
55 lines
1.2 KiB
C++
#pragma once
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#include <Common/Exception.h>
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#include <map>
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#include <memory>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int LOGICAL_ERROR;
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}
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class Block;
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/// Scalar results of subqueries
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using Scalars = std::map<String, Block>;
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class Context;
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/// Most used types have shorter names
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using ContextPtr = std::shared_ptr<const Context>;
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using ContextMutablePtr = std::shared_ptr<Context>;
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using ContextWeakPtr = std::weak_ptr<const Context>;
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using ContextWeakMutablePtr = std::weak_ptr<Context>;
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template <class Shared = ContextPtr>
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struct WithContextImpl
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{
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using Weak = typename Shared::weak_type;
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using ConstShared = std::shared_ptr<const typename Shared::element_type>;
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using ConstWeak = typename ConstShared::weak_type;
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WithContextImpl() = default;
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explicit WithContextImpl(Weak context_) : context(context_) {}
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inline Shared getContext() const
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{
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auto ptr = context.lock();
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if (!ptr) throw Exception(ErrorCodes::LOGICAL_ERROR, "Context has expired");
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return ptr;
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}
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protected:
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Weak context;
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};
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using WithContext = WithContextImpl<>;
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using WithConstContext = WithContext; /// For compatibility. Use WithContext.
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using WithMutableContext = WithContextImpl<ContextMutablePtr>;
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}
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