/**

* 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 SRC_SQL_ENGINE_EXPR_OB_EXPR_BIT_LENGTH_H_

#define SRC_SQL_ENGINE_EXPR_OB_EXPR_BIT_LENGTH_H_

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

namespace oceanbase

{

namespace sql

{

class ObExprBitLength : public ObFuncExprOperator {

public:

ObExprBitLength();

explicit ObExprBitLength(common::ObIAllocator& alloc);

virtual ~ObExprBitLength();

virtual int calc_result_type1(ObExprResType& type,

ObExprResType& text,

common::ObExprTypeCtx& type_ctx) const override;

virtual int cg_expr(ObExprCGCtx &op_cg_ctx,

const ObRawExpr &raw_expr,

ObExpr &rt_expr) const override;

static int calc_null(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);

static int calc_bit_length(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);

private:

DISALLOW_COPY_AND_ASSIGN(ObExprBitLength);

};

}

}

#endif /* SRC_SQL_ENGINE_EXPR_OB_EXPR_BIT_LENGTH_H_ */