#pragma once #include <DB/Parsers/IAST.h> namespace DB { /** SELECT запрос */ class ASTSelectQuery : public IAST { public: ASTPtr select_expression_list; ASTPtr database; ASTPtr table; /// Идентификатор или подзапрос (рекурсивно ASTSelectQuery) ASTPtr sample_size; ASTPtr where_expression; ASTPtr group_expression_list; ASTPtr having_expression; ASTPtr order_expression_list; ASTPtr limit_offset; ASTPtr limit_length; ASTPtr format; ASTSelectQuery() {} ASTSelectQuery(StringRange range_) : IAST(range_) {} /** 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 (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; } }; }