38 lines
1.5 KiB
C++
38 lines
1.5 KiB
C++
/**
|
|
* 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_SQL_EXPR_COALESCE_H_
|
|
#define _OB_SQL_EXPR_COALESCE_H_
|
|
|
|
#include "sql/engine/expr/ob_expr_operator.h"
|
|
|
|
namespace oceanbase {
|
|
namespace sql {
|
|
class ObExprCoalesce : public ObExprOperator {
|
|
public:
|
|
explicit ObExprCoalesce(common::ObIAllocator& alloc);
|
|
virtual ~ObExprCoalesce();
|
|
virtual int calc_result_typeN(
|
|
ObExprResType& type, ObExprResType* types_stack, int64_t param_num, common::ObExprTypeCtx& type_ctx) const;
|
|
virtual int calc_resultN(
|
|
common::ObObj& result, const common::ObObj* objs_stack, int64_t param_num, common::ObExprCtx& expr_ctx) const;
|
|
virtual int cg_expr(ObExprCGCtx& expr_ct_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
|
|
static int calc(common::ObObj& result, const common::ObObj* objs_stack, int64_t param_num,
|
|
const ObExprResType& expected_type, common::ObCastCtx& cast_ctx);
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(ObExprCoalesce);
|
|
};
|
|
} // namespace sql
|
|
} // namespace oceanbase
|
|
#endif /* _OB_SQL_EXPR_COALESCE_H_ */
|