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71 lines
1.6 KiB
C++
71 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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using Poco::SharedPtr;
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/** Список выражений типа "a, b + c, f(d)"
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*/
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class ASTExpressionList : public IAST
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{
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public:
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ASTExpressionList() = default;
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ASTExpressionList(const StringRange range_) : IAST(range_) {}
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/** Получить текст, который идентифицирует этот элемент. */
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String getID() const override { return "ExpressionList"; }
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ASTPtr clone() const override
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{
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const auto res = new ASTExpressionList(*this);
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ASTPtr ptr{res};
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res->children.clear();
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for (const auto & child : children)
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res->children.emplace_back(child->clone());
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return ptr;
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}
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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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for (ASTs::const_iterator it = children.begin(); it != children.end(); ++it)
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{
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if (it != children.begin())
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settings.ostr << ", ";
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(*it)->formatImpl(settings, state, frame);
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}
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}
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friend class ASTSelectQuery;
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/** Вывести список выражений в секциях запроса SELECT - по одному выражению на строку.
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*/
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void formatImplMultiline(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const
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{
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std::string indent_str = "\n" + std::string(4 * (frame.indent + 1), ' ');
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++frame.indent;
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for (ASTs::const_iterator it = children.begin(); it != children.end(); ++it)
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{
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if (it != children.begin())
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settings.ostr << ", ";
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if (children.size() > 1)
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settings.ostr << indent_str;
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(*it)->formatImpl(settings, state, frame);
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}
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}
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};
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}
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