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52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
#pragma once
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#include <DB/Core/Field.h>
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#include <DB/Core/FieldVisitors.h>
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#include <DB/Parsers/IAST.h>
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namespace DB
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{
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/** SET запрос
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*/
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class ASTSetQuery : public IAST
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{
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public:
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struct Change
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{
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String name;
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Field value;
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};
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using Changes = std::vector<Change>;
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Changes changes;
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bool global; /// Если запрос SET GLOBAL.
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ASTSetQuery() = default;
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ASTSetQuery(const StringRange range_) : IAST(range_) {}
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/** Получить текст, который идентифицирует этот элемент. */
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String getID() const override { return "Set"; };
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ASTPtr clone() const override { return std::make_shared<ASTSetQuery>(*this); }
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protected:
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void formatImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override
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{
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settings.ostr << (settings.hilite ? hilite_keyword : "") << "SET " << (global ? "GLOBAL " : "") << (settings.hilite ? hilite_none : "");
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for (ASTSetQuery::Changes::const_iterator it = changes.begin(); it != changes.end(); ++it)
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{
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if (it != changes.begin())
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settings.ostr << ", ";
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settings.ostr << it->name << " = " << apply_visitor(FieldVisitorToString(), it->value);
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}
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}
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};
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}
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