59 lines
1.7 KiB
C++
59 lines
1.7 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_IMPL_H
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#define _OB_RAW_EXPR_CANONICALIZER_IMPL_H
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#include "sql/resolver/expr/ob_raw_expr_canonicalizer.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 ObRawExprCanonicalizerImpl : public ObRawExprCanonicalizer
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{
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public:
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explicit ObRawExprCanonicalizerImpl(ObExprResolveContext &ctx);
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virtual ~ObRawExprCanonicalizerImpl() {}
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virtual int canonicalize(ObRawExpr *&expr);
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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(ObRawExprCanonicalizerImpl);
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// function members
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int push_not(ObRawExpr *&expr);
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int do_push_not(ObRawExpr *&expr);
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int remove_duplicate_conds(ObRawExpr *&expr);
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int pull_parallel_expr(ObRawExpr *&expr);
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int pull_and_factor(ObRawExpr *&expr);
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int pull_similar_expr(ObRawExpr *&expr);
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int cluster_and_or(ObRawExpr *&expr);
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private:
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struct ObOppositeOpPair
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{
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ObItemType original_;
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ObItemType opposite_;
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};
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static ObItemType get_opposite_op(ObItemType type);
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static ObOppositeOpPair OPPOSITE_PAIRS[];
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private:
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// data members
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ObExprResolveContext &ctx_;
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// ObIAllocator &allocator_;
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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_IMPL_H */
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