ClickHouse/dbms/include/DB/Parsers/ASTExpressionList.h

68 lines
1.6 KiB
C++
Raw Normal View History

2011-08-28 08:50:27 +00:00
#pragma once
2010-06-24 19:12:10 +00:00
#include <DB/Parsers/IAST.h>
namespace DB
{
/** Список выражений типа "a, b + c, f(d)"
*/
class ASTExpressionList : public IAST
{
public:
ASTExpressionList() = default;
2014-12-17 15:26:24 +00:00
ASTExpressionList(const StringRange range_) : IAST(range_) {}
2011-08-09 19:19:00 +00:00
/** Получить текст, который идентифицирует этот элемент. */
String getID() const override { return "ExpressionList"; }
2011-12-12 06:15:34 +00:00
ASTPtr clone() const override
2011-12-12 06:15:34 +00:00
{
const auto res = std::make_shared<ASTExpressionList>(*this);
ASTPtr ptr{res};
2011-12-12 06:15:34 +00:00
res->children.clear();
for (const auto & child : children)
res->children.emplace_back(child->clone());
2011-12-12 06:15:34 +00:00
return ptr;
2011-12-12 06:15:34 +00:00
}
protected:
void formatImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override
{
for (ASTs::const_iterator it = children.begin(); it != children.end(); ++it)
{
if (it != children.begin())
settings.ostr << ", ";
(*it)->formatImpl(settings, state, frame);
}
}
friend class ASTSelectQuery;
/** Вывести список выражений в секциях запроса SELECT - по одному выражению на строку.
*/
void formatImplMultiline(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const
{
std::string indent_str = "\n" + std::string(4 * (frame.indent + 1), ' ');
++frame.indent;
for (ASTs::const_iterator it = children.begin(); it != children.end(); ++it)
{
if (it != children.begin())
settings.ostr << ", ";
if (children.size() > 1)
settings.ostr << indent_str;
(*it)->formatImpl(settings, state, frame);
}
}
2010-06-24 19:12:10 +00:00
};
}