/**
 * 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_SQL_OB_EXPR_EQUAL_H_
#define OCEANBASE_SQL_OB_EXPR_EQUAL_H_

#include "lib/ob_name_def.h"
#include "share/object/ob_obj_cast.h"
#include "sql/engine/expr/ob_expr_operator.h"

namespace oceanbase {
namespace sql {
class ObExprEqual : public ObRelationalExprOperator {
public:
  ObExprEqual();
  explicit ObExprEqual(common::ObIAllocator& alloc);
  virtual ~ObExprEqual(){};
  virtual int calc_result2(common::ObObj& result, const common::ObObj& obj1, const common::ObObj& obj2,
      common::ObExprCtx& expr_ctx) const override;
  virtual int calc_resultN(common::ObObj& result, const common::ObObj* objs_stack, int64_t param_num,
      common::ObExprCtx& expr_ctx) const override;

  virtual int cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override
  {
    // TODO : process pl udt compare.
    return ObRelationalExprOperator::cg_expr(expr_cg_ctx, raw_expr, rt_expr);
  }

  static int calc(common::ObObj& result, const common::ObObj& obj1, const common::ObObj& obj2,
      const common::ObCompareCtx& cmp_ctx, common::ObCastCtx& cast_ctx);
  static int calc_cast(common::ObObj& result, const common::ObObj& obj1, const common::ObObj& obj2,
      const common::ObCompareCtx& cmp_ctx, common::ObCastCtx& cast_ctx);
  static int calc_without_cast(common::ObObj& result, const common::ObObj& obj1, const common::ObObj& obj2,
      const common::ObCompareCtx& cmp_ctx, bool& need_cast);
  virtual int calc_result_type2(
      ObExprResType& type, ObExprResType& type1, ObExprResType& type2, common::ObExprTypeCtx& type_ctx) const override;

private:
  DISALLOW_COPY_AND_ASSIGN(ObExprEqual);
};

}  // end namespace sql
}  // end namespace oceanbase

#endif  // OCEANBASE_SQL_OB_EXPR_EQUAL_H_
