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

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#pragma once
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#include <DB/Parsers/IAST.h>
namespace DB
{
/** SELECT запрос
*/
class ASTSelectQuery : public IAST
{
public:
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ASTPtr select_expression_list;
ASTPtr database;
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ASTPtr table; /// Идентификатор или подзапрос (рекурсивно ASTSelectQuery)
ASTPtr sample_size;
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ASTPtr where_expression;
ASTPtr group_expression_list;
ASTPtr having_expression;
ASTPtr order_expression_list;
ASTPtr limit_offset;
ASTPtr limit_length;
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ASTPtr format;
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ASTSelectQuery() {}
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ASTSelectQuery(StringRange range_) : IAST(range_) {}
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/** Получить текст, который идентифицирует этот элемент. */
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String getID() const { return "SelectQuery"; };
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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); }
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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;
}
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};
}