mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-24 18:50:49 +00:00
44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
#pragma once
|
|
|
|
#include <Core/Field.h>
|
|
#include <Common/FieldVisitors.h>
|
|
#include <Parsers/ASTWithAlias.h>
|
|
#include <Parsers/TokenIterator.h>
|
|
#include <optional>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
/** Literal (atomic) - number, string, NULL
|
|
*/
|
|
class ASTLiteral : public ASTWithAlias
|
|
{
|
|
public:
|
|
Field value;
|
|
|
|
/// For ConstantExpressionTemplate
|
|
std::optional<TokenIterator> begin;
|
|
std::optional<TokenIterator> end;
|
|
|
|
ASTLiteral(Field && value_) : value(value_) {}
|
|
ASTLiteral(const Field & value_) : value(value_) {}
|
|
|
|
/** Get the text that identifies this element. */
|
|
String getID(char delim) const override { return "Literal" + (delim + applyVisitor(FieldVisitorDump(), value)); }
|
|
|
|
ASTPtr clone() const override { return std::make_shared<ASTLiteral>(*this); }
|
|
|
|
void updateTreeHashImpl(SipHash & hash_state) const override;
|
|
|
|
protected:
|
|
void formatImplWithoutAlias(const FormatSettings & settings, FormatState &, FormatStateStacked) const override
|
|
{
|
|
settings.ostr << applyVisitor(FieldVisitorToString(), value);
|
|
}
|
|
|
|
void appendColumnNameImpl(WriteBuffer & ostr) const override;
|
|
};
|
|
|
|
}
|