50 lines
1.6 KiB
C++
50 lines
1.6 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 _OB_EXPR_MD5_H_
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#define _OB_EXPR_MD5_H_
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#include "sql/engine/expr/ob_expr_operator.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 ObExprMd5: public ObStringExprOperator
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{
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public:
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ObExprMd5();
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explicit ObExprMd5(common::ObIAllocator &alloc);
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virtual ~ObExprMd5();
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public:
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virtual int calc_result_type1(ObExprResType &type,
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ObExprResType &str,
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common::ObExprTypeCtx &type_ctx) const;
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virtual int cg_expr(ObExprCGCtx &op_cg_ctx,
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const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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static int calc_md5(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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private:
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int calc_md5(common::ObObj &result,
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const common::ObString &str,
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common::ObIAllocator *allocator,
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common::ObCollationType col_type) const;
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static const common::ObString::obstr_size_t MD5_LENGTH = 16;
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObExprMd5);
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};
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} /* namespace sql */
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} /* namespace oceanbase */
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#endif /* _OB_EXPR_MD5_H_ */
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