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21 lines
467 B
C++
21 lines
467 B
C++
#pragma once
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#include <DataTypes/IDataType.h>
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namespace DB
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{
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/** Knows the names and types of all possible virtual columns.
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* It is necessary for engines that redirect a request to other tables without knowing in advance what virtual columns they contain.
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*/
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class VirtualColumnFactory
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{
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public:
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static bool hasColumn(const String & name);
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static DataTypePtr getType(const String & name);
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static DataTypePtr tryGetType(const String & name);
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};
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}
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