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56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
#pragma once
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#include <DB/Parsers/IAST.h>
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namespace DB
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{
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/** Query with output options (supporting [INTO OUTFILE 'file_name'] [FORMAT format_name] suffix).
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*/
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class ASTQueryWithOutput : public IAST
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{
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public:
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ASTPtr out_file;
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ASTPtr format;
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ASTQueryWithOutput() = default;
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ASTQueryWithOutput(const StringRange range_) : IAST(range_) {}
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protected:
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/// NOTE: call this helper at the end of the clone() method of descendant class.
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void cloneOutputOptions(ASTQueryWithOutput & cloned) const;
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/// Format only the query part of the AST (without output options).
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virtual void formatQueryImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const = 0;
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void formatImpl(const FormatSettings & s, FormatState & state, FormatStateStacked frame) const override final;
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};
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/// Объявляет класс-наследник ASTQueryWithOutput с реализованными методами getID и clone.
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#define DEFINE_AST_QUERY_WITH_OUTPUT(Name, ID, Query) \
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class Name : public ASTQueryWithOutput \
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{ \
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public: \
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Name() {} \
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Name(StringRange range_) : ASTQueryWithOutput(range_) {} \
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String getID() const override { return ID; }; \
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\
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ASTPtr clone() const override \
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{ \
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std::shared_ptr<Name> res = std::make_shared<Name>(*this); \
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res->children.clear(); \
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cloneOutputOptions(*res); \
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return res; \
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} \
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\
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protected: \
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void formatQueryImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override \
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{ \
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settings.ostr << (settings.hilite ? hilite_keyword : "") << Query << (settings.hilite ? hilite_none : ""); \
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} \
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};
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}
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