41 lines
1.5 KiB
C++
41 lines
1.5 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#ifndef OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_WEGHT_STRING_H_
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#define OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_WEGHT_STRING_H_
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#include "sql/engine/expr/ob_expr_operator.h"
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#include "share/object/ob_obj_cast.h"
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namespace oceanbase
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{
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namespace sql
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{
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class ObExprWeightString : public ObStringExprOperator
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{
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public:
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explicit ObExprWeightString(common::ObIAllocator &alloc);
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virtual ~ObExprWeightString() override;
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virtual int calc_result_typeN(ObExprResType &type,
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ObExprResType *types,
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int64_t param_num,
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common::ObExprTypeCtx &type_ctx) const override;
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static int eval_weight_string(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &epr_datum);
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virtual int cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr, ObExpr &rt_expr) const override;
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private:
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static uint64_t ob_strxfrm_flag_normalize(uint64_t flags, uint64_t maximum);
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DISALLOW_COPY_AND_ASSIGN(ObExprWeightString);
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};
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}
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}
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#endif /* OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_WEGHT_STRING_H_ */
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