43 lines
1.3 KiB
C++
43 lines
1.3 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_EXPR_CARDINALITY
|
|
#define OB_EXPR_CARDINALITY
|
|
|
|
#include "sql/engine/expr/ob_expr_operator.h"
|
|
|
|
namespace oceanbase
|
|
{
|
|
namespace sql
|
|
{
|
|
class ObExprCardinality : public ObFuncExprOperator
|
|
{
|
|
public:
|
|
explicit ObExprCardinality(common::ObIAllocator& alloc);
|
|
virtual ~ObExprCardinality();
|
|
int assign(const ObExprOperator &other);
|
|
virtual int calc_result_type1(ObExprResType &type, ObExprResType &type1,
|
|
common::ObExprTypeCtx &type_ctx) const;
|
|
|
|
virtual int cg_expr(ObExprCGCtx &op_cg_ctx,
|
|
const ObRawExpr &raw_expr,
|
|
ObExpr &rt_expr) const override;
|
|
static int eval_card(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(ObExprCardinality);
|
|
};
|
|
}
|
|
}
|
|
|
|
#endif
|