69 lines
2.2 KiB
C++
69 lines
2.2 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_ADD_TO_CONTEXT_H
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#define _OB_RAW_EXPR_ADD_TO_CONTEXT_H
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#include "sql/optimizer/ob_logical_operator.h"
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#include "sql/resolver/expr/ob_raw_expr.h"
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namespace oceanbase {
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namespace sql {
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/**
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* This class is used to traverse an expression tree in a post-order fashion to
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* add all required expressions into the context data structure, which is used
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* during output expr allocation.
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*/
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class ObRawExprAddToContext: public ObRawExprVisitor
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{
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public:
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ObRawExprAddToContext(common::ObIArray<ExprProducer> *ctx, uint64_t id)
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: ctx_(ctx), consumer_id_(id), keep_working_(true)
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{}
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virtual ~ObRawExprAddToContext() {}
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/**
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* The starting point
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*/
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int add_to_context(ObRawExpr &expr);
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/// interface of ObRawExprVisitor
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virtual int visit(ObConstRawExpr &expr);
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virtual int visit(ObVarRawExpr &expr);
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virtual int visit(ObOpPseudoColumnRawExpr &expr);
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virtual int visit(ObQueryRefRawExpr &expr);
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virtual int visit(ObColumnRefRawExpr &expr);
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virtual int visit(ObOpRawExpr &expr);
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virtual int visit(ObCaseOpRawExpr &expr);
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virtual int visit(ObAggFunRawExpr &expr);
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virtual int visit(ObSysFunRawExpr &expr);
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virtual int visit(ObSetOpRawExpr &expr);
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virtual int visit(ObWinFunRawExpr &expr);
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virtual int visit(ObPseudoColumnRawExpr &expr);
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virtual int visit(ObPlQueryRefRawExpr &expr);
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private:
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int add_expr(ObRawExpr &expr);
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// types and constants
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private:
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// function members
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private:
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common::ObIArray<ExprProducer> *ctx_;
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uint64_t consumer_id_;
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bool keep_working_;
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObRawExprAddToContext);
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};
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}
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}
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#endif // _OB_RAW_EXPR_ADD_TO_CONTEXT_H
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