mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-13 11:04:10 +00:00
60 lines
2.6 KiB
C++
60 lines
2.6 KiB
C++
#pragma once
|
|
|
|
#include <DB/Parsers/IAST.h>
|
|
#include <DB/Parsers/ASTQueryWithOutput.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
|
|
/** SELECT запрос
|
|
*/
|
|
class ASTSelectQuery : public ASTQueryWithOutput
|
|
{
|
|
public:
|
|
bool distinct;
|
|
ASTPtr select_expression_list;
|
|
ASTPtr database;
|
|
ASTPtr table; /// Идентификатор или подзапрос (рекурсивно ASTSelectQuery)
|
|
ASTPtr array_join_identifier;
|
|
bool final;
|
|
ASTPtr sample_size;
|
|
ASTPtr where_expression;
|
|
ASTPtr group_expression_list;
|
|
bool group_by_with_totals;
|
|
ASTPtr having_expression;
|
|
ASTPtr order_expression_list;
|
|
ASTPtr limit_offset;
|
|
ASTPtr limit_length;
|
|
|
|
ASTSelectQuery() : distinct(false), final(false), group_by_with_totals(false) {}
|
|
ASTSelectQuery(StringRange range_) : ASTQueryWithOutput(range_), distinct(false), final(false), group_by_with_totals(false) {}
|
|
|
|
/** Получить текст, который идентифицирует этот элемент. */
|
|
String getID() const { return "SelectQuery"; };
|
|
|
|
ASTPtr clone() const
|
|
{
|
|
ASTSelectQuery * res = new ASTSelectQuery(*this);
|
|
res->children.clear();
|
|
|
|
if (select_expression_list) { res->select_expression_list = select_expression_list->clone(); res->children.push_back(res->select_expression_list); }
|
|
if (database) { res->database = database->clone(); res->children.push_back(res->database); }
|
|
if (table) { res->table = table->clone(); res->children.push_back(res->table); }
|
|
if (array_join_identifier) { res->array_join_identifier = array_join_identifier->clone(); res->children.push_back(res->array_join_identifier); }
|
|
if (sample_size) { res->sample_size = sample_size->clone(); res->children.push_back(res->sample_size); }
|
|
if (where_expression) { res->where_expression = where_expression->clone(); res->children.push_back(res->where_expression); }
|
|
if (group_expression_list) { res->group_expression_list = group_expression_list->clone(); res->children.push_back(res->group_expression_list); }
|
|
if (having_expression) { res->having_expression = having_expression->clone(); res->children.push_back(res->having_expression); }
|
|
if (order_expression_list) { res->order_expression_list = order_expression_list->clone(); res->children.push_back(res->order_expression_list); }
|
|
if (limit_offset) { res->limit_offset = limit_offset->clone(); res->children.push_back(res->limit_offset); }
|
|
if (limit_length) { res->limit_length = limit_length->clone(); res->children.push_back(res->limit_length); }
|
|
if (format) { res->format = format->clone(); res->children.push_back(res->format); }
|
|
|
|
return res;
|
|
}
|
|
};
|
|
|
|
}
|