52 lines
2.0 KiB
C++
52 lines
2.0 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 OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_UNHEX_
|
|
#define OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_UNHEX_
|
|
|
|
#include "sql/engine/expr/ob_expr_operator.h"
|
|
|
|
namespace oceanbase {
|
|
namespace sql {
|
|
class ObExprUnhex : public ObStringExprOperator {
|
|
public:
|
|
explicit ObExprUnhex(common::ObIAllocator& alloc);
|
|
virtual ~ObExprUnhex();
|
|
virtual int calc_result_type1(
|
|
ObExprResType& type, ObExprResType& text, common::ObExprTypeCtx& type_ctx) const override;
|
|
static int calc(common::ObObj& result, const common::ObObj& text, common::ObCastCtx& cast_ctx, common::ObExprCtx& expr_ctx);
|
|
virtual int calc_result1(
|
|
common::ObObj& result, const common::ObObj& text, common::ObExprCtx& expr_ctx) const override;
|
|
virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
|
|
static int eval_unhex(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res_datum);
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(ObExprUnhex);
|
|
};
|
|
|
|
inline int ObExprUnhex::calc_result_type1(
|
|
ObExprResType& type, ObExprResType& text, common::ObExprTypeCtx& type_ctx) const
|
|
{
|
|
UNUSED(type_ctx);
|
|
|
|
text.set_calc_type(common::ObVarcharType);
|
|
|
|
type.set_varchar();
|
|
type.set_length(text.get_length() / 2 + (text.get_length() % 2));
|
|
type.set_collation_level(common::CS_LEVEL_COERCIBLE);
|
|
type.set_collation_type(common::CS_TYPE_BINARY);
|
|
return common::OB_SUCCESS;
|
|
}
|
|
} // namespace sql
|
|
} // namespace oceanbase
|
|
#endif /* OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_UNHEX_ */
|