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52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
#pragma once
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#include <DB/Parsers/ASTWithAlias.h>
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namespace DB
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{
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/** Подзарос SELECT
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*/
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class ASTSubquery : public ASTWithAlias
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{
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public:
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ASTSubquery() = default;
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ASTSubquery(const StringRange range_) : ASTWithAlias(range_) {}
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/** Получить текст, который идентифицирует этот элемент. */
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String getID() const override { return "Subquery"; }
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ASTPtr clone() const override
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{
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const auto res = std::make_shared<ASTSubquery>(*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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String getColumnName() const override { return getTreeID(); }
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protected:
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void formatImplWithoutAlias(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override
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{
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std::string indent_str = settings.one_line ? "" : std::string(4 * frame.indent, ' ');
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std::string nl_or_nothing = settings.one_line ? "" : "\n";
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settings.ostr << nl_or_nothing << indent_str << "(" << nl_or_nothing;
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FormatStateStacked frame_nested = frame;
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frame_nested.need_parens = false;
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++frame_nested.indent;
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children[0]->formatImpl(settings, state, frame_nested);
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settings.ostr << nl_or_nothing << indent_str << ")";
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}
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};
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}
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