48 lines
1.2 KiB
C++
48 lines
1.2 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_RAW_EXPR_CANONICALIZER_H
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#define _OB_RAW_EXPR_CANONICALIZER_H 1
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#include "sql/resolver/expr/ob_raw_expr.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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// 表达式规范化
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class ObRawExprCanonicalizer
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{
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public:
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ObRawExprCanonicalizer() {}
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virtual ~ObRawExprCanonicalizer() {}
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/**
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* Canonicalize the expression.
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*
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* @param expr [in/out]
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*
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* @return error code
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*/
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virtual int canonicalize(ObRawExpr *&expr) = 0;
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private:
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// types and constants
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private:
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObRawExprCanonicalizer);
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// function members
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private:
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// data members
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};
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} // end namespace sql
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} // end namespace oceanbase
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#endif /* _OB_RAW_EXPR_CANONICALIZER_H */
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