ClickHouse/dbms/include/DB/Parsers/ASTColumnDeclaration.h
2017-03-09 07:26:17 +03:00

66 lines
1.5 KiB
C++

#pragma once
#include <DB/Parsers/IAST.h>
namespace DB
{
/** Name, type, default-specifier, default-expression.
* The type is optional if default-expression is specified.
*/
class ASTColumnDeclaration : public IAST
{
public:
String name;
ASTPtr type;
String default_specifier;
ASTPtr default_expression;
ASTColumnDeclaration() = default;
ASTColumnDeclaration(const StringRange range) : IAST{range} {}
String getID() const override { return "ColumnDeclaration_" + name; }
ASTPtr clone() const override
{
const auto res = std::make_shared<ASTColumnDeclaration>(*this);
ASTPtr ptr{res};
res->children.clear();
if (type) {
res->type = type->clone();
res->children.push_back(res->type);
}
if (default_expression) {
res->default_expression = default_expression->clone();
res->children.push_back(res->default_expression);
}
return ptr;
}
protected:
void formatImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override
{
frame.need_parens = false;
std::string indent_str = settings.one_line ? "" : std::string(4 * frame.indent, ' ');
settings.ostr << settings.nl_or_ws << indent_str << backQuoteIfNeed(name);
if (type)
{
settings.ostr << ' ';
type->formatImpl(settings, state, frame);
}
if (default_expression)
{
settings.ostr << ' ' << (settings.hilite ? hilite_keyword : "") << default_specifier << (settings.hilite ? hilite_none : "") << ' ';
default_expression->formatImpl(settings, state, frame);
}
}
};
}