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42 lines
851 B
C++
42 lines
851 B
C++
#pragma once
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#include <Parsers/IAST_fwd.h>
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#include <Parsers/ASTColumnDeclaration.h>
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#include <base/types.h>
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namespace DB
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{
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enum StatisticType
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{
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TDigest = 0,
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};
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class ColumnsDescription;
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struct StatisticDescription
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{
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/// the type of statistic, right now it's only tdigest.
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StatisticType type;
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/// Names of statistic columns
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String column_name;
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ASTPtr ast;
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String getTypeName() const;
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StatisticDescription() = default;
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bool operator==(const StatisticDescription & other) const
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{
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return type == other.type && column_name == other.column_name;
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}
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static StatisticDescription getStatisticFromColumnDeclaration(const ASTColumnDeclaration & column);
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static std::vector<StatisticDescription> getStatisticsFromAST(const ASTPtr & definition_ast, const ColumnsDescription & columns);
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};
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}
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