110 lines
2.8 KiB
C++
110 lines
2.8 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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#define USING_LOG_PREFIX SQL_ENG
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#include "sql/engine/ob_double_children_phy_operator.h"
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using namespace oceanbase::sql;
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using namespace oceanbase::common;
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ObDoubleChildrenPhyOperator::ObDoubleChildrenPhyOperator(ObIAllocator& alloc)
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: ObPhyOperator(alloc), left_op_(NULL), right_op_(NULL)
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{}
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ObDoubleChildrenPhyOperator::~ObDoubleChildrenPhyOperator()
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{}
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void ObDoubleChildrenPhyOperator::reset()
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{
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left_op_ = NULL;
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right_op_ = NULL;
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ObPhyOperator::reset();
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}
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void ObDoubleChildrenPhyOperator::reuse()
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{
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left_op_ = NULL;
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right_op_ = NULL;
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ObPhyOperator::reuse();
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}
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int ObDoubleChildrenPhyOperator::set_child(int32_t child_idx, ObPhyOperator& child_operator)
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{
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int ret = OB_SUCCESS;
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if (0 == child_idx) {
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if (OB_UNLIKELY(NULL != left_op_)) {
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ret = OB_INIT_TWICE;
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LOG_ERROR("left operator already init");
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} else {
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left_op_ = &child_operator;
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}
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} else if (1 == child_idx) {
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if (OB_UNLIKELY(NULL != right_op_)) {
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ret = OB_INIT_TWICE;
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LOG_ERROR("right operator already init");
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} else {
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right_op_ = &child_operator;
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}
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} else {
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ret = OB_INVALID_ARGUMENT;
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LOG_ERROR("invalid child idx", K(child_idx));
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}
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if (OB_SUCC(ret)) {
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child_operator.set_parent(this);
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}
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return ret;
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}
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ObPhyOperator* ObDoubleChildrenPhyOperator::get_child(int32_t child_idx) const
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{
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ObPhyOperator* ret = NULL;
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if (0 == child_idx) {
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ret = left_op_;
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} else if (1 == child_idx) {
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ret = right_op_;
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}
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return ret;
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}
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int ObDoubleChildrenPhyOperator::accept(ObPhyOperatorVisitor& visitor) const
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{
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int ret = OB_SUCCESS;
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// pre-visit
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if (OB_FAIL(visitor.pre_visit(*this))) {
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LOG_WARN("fail to pre-visit", K(*this));
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}
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// visit children
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if (OB_SUCC(ret)) {
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if (OB_ISNULL(left_op_) || OB_ISNULL(right_op_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("invalid argument", K(left_op_), K(right_op_));
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} else if (OB_FAIL(left_op_->accept(visitor))) {
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LOG_WARN("fail to accept left op", K(*left_op_));
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} else if (OB_FAIL(right_op_->accept(visitor))) {
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LOG_WARN("fail to accept left op", K(*right_op_));
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} else {
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// done
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}
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}
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// post-visit
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if (OB_SUCC(ret)) {
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if (OB_FAIL(visitor.post_visit(*this))) {
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LOG_WARN("fail to post-visit", K(*this));
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}
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}
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return ret;
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}
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