75 lines
2.1 KiB
C++
75 lines
2.1 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 "ob_subplan_scan_op.h"
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namespace oceanbase {
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using namespace common;
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namespace sql {
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ObSubPlanScanSpec::ObSubPlanScanSpec(ObIAllocator& alloc, const ObPhyOperatorType type)
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: ObOpSpec(alloc, type), projector_(alloc)
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{}
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OB_SERIALIZE_MEMBER((ObSubPlanScanSpec, ObOpSpec), projector_);
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ObSubPlanScanOp::ObSubPlanScanOp(ObExecContext& exec_ctx, const ObOpSpec& spec, ObOpInput* input)
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: ObOperator(exec_ctx, spec, input)
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{}
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int ObSubPlanScanOp::inner_open()
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{
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int ret = OB_SUCCESS;
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if (OB_ISNULL(child_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("no child", K(ret));
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} else if (OB_UNLIKELY(MY_SPEC.projector_.count() % 2 != 0)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("projector array size should be multiples of 2", K(ret));
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}
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return ret;
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}
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int ObSubPlanScanOp::rescan()
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{
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return ObOperator::rescan();
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}
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int ObSubPlanScanOp::inner_get_next_row()
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{
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int ret = OB_SUCCESS;
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clear_evaluated_flag();
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if (OB_FAIL(child_->get_next_row())) {
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if (OB_ITER_END != ret) {
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LOG_WARN("get row from child failed", K(ret));
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}
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} else {
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for (int64_t i = 0; OB_SUCC(ret) && i < MY_SPEC.projector_.count(); i += 2) {
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ObExpr* from = MY_SPEC.projector_[i];
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ObExpr* to = MY_SPEC.projector_[i + 1];
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ObDatum* datum = NULL;
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if (OB_FAIL(from->eval(eval_ctx_, datum))) {
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LOG_WARN("expr evaluate failed", K(ret), K(*from));
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} else {
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to->locate_expr_datum(eval_ctx_) = *datum;
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to->get_eval_info(eval_ctx_).evaluated_ = true;
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}
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}
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}
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return ret;
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}
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} // end namespace sql
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} // end namespace oceanbase
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