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53 lines
2.0 KiB
C++
53 lines
2.0 KiB
C++
#pragma once
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#include <DB/Parsers/IAST.h>
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namespace DB
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{
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/** SELECT запрос
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*/
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class ASTSelectQuery : public IAST
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{
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public:
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ASTPtr select_expression_list;
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ASTPtr database;
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ASTPtr table; /// Идентификатор или подзапрос (рекурсивно ASTSelectQuery)
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ASTPtr where_expression;
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ASTPtr group_expression_list;
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ASTPtr having_expression;
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ASTPtr order_expression_list;
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ASTPtr limit_offset;
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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() { return "SelectQuery"; };
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ASTPtr clone() const
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{
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ASTSelectQuery * res = new ASTSelectQuery(*this);
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res->children.clear();
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if (select_expression_list) { res->select_expression_list = select_expression_list->clone(); res->children.push_back(res->select_expression_list); }
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if (database) { res->database = database->clone(); res->children.push_back(res->database); }
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if (table) { res->table = table->clone(); res->children.push_back(res->table); }
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if (where_expression) { res->where_expression = where_expression->clone(); res->children.push_back(res->where_expression); }
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if (group_expression_list) { res->group_expression_list = group_expression_list->clone(); res->children.push_back(res->group_expression_list); }
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if (having_expression) { res->having_expression = having_expression->clone(); res->children.push_back(res->having_expression); }
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if (order_expression_list) { res->order_expression_list = order_expression_list->clone(); res->children.push_back(res->order_expression_list); }
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if (limit_offset) { res->limit_offset = limit_offset->clone(); res->children.push_back(res->limit_offset); }
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if (limit_length) { res->limit_length = limit_length->clone(); res->children.push_back(res->limit_length); }
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if (format) { res->format = format->clone(); res->children.push_back(res->format); }
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return res;
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}
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};
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}
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