/**

* 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 OCEANBASE_EXPR_CMP_FUNC_H_

#define OCEANBASE_EXPR_CMP_FUNC_H_

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

#include "common/object/ob_object.h"

#include "common/object/ob_obj_compare.h"

#include "lib/charset/ob_charset.h"

namespace oceanbase

{

namespace common

{

struct ObDatum;

}

namespace sql

{

typedef int (*DatumCmpFunc)(const common::ObDatum &datum1, const common::ObDatum &datum2, int &cmp_ret);

class ObExprCmpFuncsHelper

{

public:

static sql::ObExpr::EvalFunc get_eval_expr_cmp_func(

const common::ObObjType type1,

const common::ObObjType type2,

const common::ObScale scale1,

const common::ObScale scale2,

const common::ObPrecision prec1,

const common::ObPrecision prec2,

const common::ObCmpOp cmp_op,

const bool is_oracle_mode,

const common::ObCollationType cs_type,

const bool has_lob_header);

static sql::ObExpr::EvalBatchFunc get_eval_batch_expr_cmp_func(

const common::ObObjType type1,

const common::ObObjType type2,

const common::ObScale scale1,

const common::ObScale scale2,

const common::ObPrecision prec1,

const common::ObPrecision prec2,

const common::ObCmpOp cmp_op,

const bool is_oracle_mode,

const common::ObCollationType cs_type,

const bool has_lob_header);

static DatumCmpFunc get_datum_expr_cmp_func(

const common::ObObjType type1,

const common::ObObjType type2,

const common::ObScale scale1,

const common::ObScale scale2,

const common::ObPrecision prec1,

const common::ObPrecision prec2,

const bool is_oracle_mode,

const common::ObCollationType cs_type,

const bool has_lob_header);

};

}

} // end namespace oceanbase

#endif // !OCEANBASE_EXPR_CMP_FUNC_H_