/**

* Copyright (c) 2021 OceanBase

* OceanBase CE is licensed under Mulan PubL v2.

* You can use this software according to the terms and conditions of the Mulan PubL v2.

* You may obtain a copy of Mulan PubL v2 at:

* http://license.coscl.org.cn/MulanPubL-2.0

* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,

* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,

* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.

* See the Mulan PubL v2 for more details.

*/

#ifndef _OB_EXPR_GENERATOR_H

#define _OB_EXPR_GENERATOR_H 1

#include "sql/resolver/expr/ob_raw_expr.h"

#include "sql/engine/expr/ob_sql_expression.h"

namespace oceanbase

{

namespace sql

{

class ObExprGenerator

{

public:

ObExprGenerator(){}

virtual ~ObExprGenerator(){}

virtual int generate(ObRawExpr &raw_expr, ObSqlExpression &out_expr) = 0;

private:

// disallow copy

DISALLOW_COPY_AND_ASSIGN(ObExprGenerator);

};

} // end namespace sql

} // end namespace oceanbase

#endif /* _OB_EXPR_GENERATOR_H */