2018-01-10 15:45:05 +00:00
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#pragma once
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#include <Columns/ColumnArray.h>
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2018-01-17 19:22:09 +00:00
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#include <Functions/GatherUtils/ArraySourceVisitor.h>
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2018-01-10 15:45:05 +00:00
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namespace DB::GatherUtils
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{
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struct IArraySource
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{
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virtual ~IArraySource() = default;
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virtual size_t getSizeForReserve() const = 0;
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virtual const typename ColumnArray::Offsets & getOffsets() const = 0;
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virtual size_t getColumnSize() const = 0;
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virtual bool isConst() const { return false; }
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virtual bool isNullable() const { return false; }
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2018-01-17 19:22:09 +00:00
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virtual void accept(ArraySourceVisitor &)
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{
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throw Exception("Accept not implemented for " + demangle(typeid(*this).name()));
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}
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2018-01-10 15:45:05 +00:00
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};
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2018-01-17 19:22:09 +00:00
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template <typename Derived>
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class ArraySourceImpl : public Visitable<Derived, IArraySource, ArraySourceVisitor> {};
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2018-01-10 15:45:05 +00:00
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}
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