125 lines
3.5 KiB
C++
125 lines
3.5 KiB
C++
/**
|
|
* Copyright (c) 2021 OceanBase
|
|
* OceanBase CE is licensed under Mulan PubL v2.
|
|
* You can use this software according to the terms and conditions of the Mulan PubL v2.
|
|
* You may obtain a copy of Mulan PubL v2 at:
|
|
* http://license.coscl.org.cn/MulanPubL-2.0
|
|
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
|
|
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
|
|
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
|
|
* See the Mulan PubL v2 for more details.
|
|
*/
|
|
|
|
#define USING_LOG_PREFIX SQL_ENG
|
|
|
|
#include "ob_merge_intersect_op.h"
|
|
|
|
namespace oceanbase {
|
|
using namespace common;
|
|
namespace sql {
|
|
|
|
ObMergeIntersectSpec::ObMergeIntersectSpec(common::ObIAllocator& alloc, const ObPhyOperatorType type)
|
|
: ObMergeSetSpec(alloc, type)
|
|
{}
|
|
|
|
OB_SERIALIZE_MEMBER((ObMergeIntersectSpec, ObMergeSetSpec));
|
|
|
|
ObMergeIntersectOp::ObMergeIntersectOp(ObExecContext& exec_ctx, const ObOpSpec& spec, ObOpInput* input)
|
|
: ObMergeSetOp(exec_ctx, spec, input), right_iter_end_(false), first_got_right_row_(true)
|
|
{}
|
|
|
|
int ObMergeIntersectOp::inner_open()
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
if (OB_UNLIKELY(nullptr == left_ || nullptr == right_)) {
|
|
ret = OB_ERR_UNEXPECTED;
|
|
LOG_WARN("unexpected status: left or right is null", K(ret));
|
|
} else if (OB_FAIL(ObMergeSetOp::inner_open())) {
|
|
LOG_WARN("failed to init open", K(ret));
|
|
} else {
|
|
need_skip_init_row_ = true;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ObMergeIntersectOp::inner_close()
|
|
{
|
|
return ObMergeSetOp::inner_close();
|
|
}
|
|
|
|
int ObMergeIntersectOp::rescan()
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
if (OB_FAIL(ObMergeSetOp::rescan())) {
|
|
LOG_WARN("failed to rescan", K(ret));
|
|
} else {
|
|
right_iter_end_ = false;
|
|
first_got_right_row_ = true;
|
|
need_skip_init_row_ = true;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
void ObMergeIntersectOp::destroy()
|
|
{
|
|
ObMergeSetOp::destroy();
|
|
}
|
|
|
|
int ObMergeIntersectOp::inner_get_next_row()
|
|
{
|
|
int ret = OB_SUCCESS;
|
|
int cmp = 0;
|
|
bool break_outer_loop = false;
|
|
const ObIArray<ObExpr*>* left_row = NULL;
|
|
if (iter_end_) {
|
|
ret = OB_ITER_END;
|
|
}
|
|
clear_evaluated_flag();
|
|
while (OB_SUCC(ret) && OB_SUCC(do_strict_distinct(*left_, last_row_.store_row_, left_row))) {
|
|
while (OB_SUCC(ret) && !right_iter_end_) {
|
|
if (!first_got_right_row_) {
|
|
if (OB_FAIL(cmp_(right_->get_spec().output_, *left_row, eval_ctx_, cmp))) {
|
|
LOG_WARN("cmp_ input_row with right_row failed", K(*left_row), K(ret));
|
|
} else if (cmp >= 0) {
|
|
break_outer_loop = 0 == cmp ? true : false;
|
|
break;
|
|
} else {
|
|
if (OB_FAIL(right_->get_next_row())) {
|
|
if (OB_ITER_END == ret) {
|
|
right_iter_end_ = true;
|
|
} else {
|
|
LOG_WARN("fail to get right operator row", K(ret));
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// get first row
|
|
first_got_right_row_ = false;
|
|
if (OB_FAIL(right_->get_next_row())) {
|
|
if (OB_ITER_END == ret) {
|
|
right_iter_end_ = true;
|
|
} else {
|
|
LOG_WARN("fail to get right operator row", K(ret));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (break_outer_loop) {
|
|
break;
|
|
}
|
|
}
|
|
if (OB_SUCC(ret)) {
|
|
if (OB_FAIL(convert_row(*left_row, MY_SPEC.set_exprs_))) {
|
|
LOG_WARN("failed to convert row", K(ret));
|
|
} else if (OB_FAIL(last_row_.save_store_row(*left_row, eval_ctx_, 0))) {
|
|
LOG_WARN("failed to save right row", K(ret));
|
|
}
|
|
} else if (OB_ITER_END == ret) {
|
|
iter_end_ = true;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
} // end namespace sql
|
|
} // end namespace oceanbase
|