448 lines
14 KiB
C++
448 lines
14 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_temp_table_access_op.h"
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#include "sql/engine/ob_operator_reg.h"
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#include "sql/dtl/ob_dtl_interm_result_manager.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/engine/px/ob_px_util.h"
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#include "sql/engine/ob_physical_plan.h"
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#include "sql/engine/ob_exec_context.h"
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namespace oceanbase
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{
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using namespace common;
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using namespace storage;
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using namespace share;
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using namespace share::schema;
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namespace sql
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{
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#define USE_MULTI_GET_ARRAY_BINDING 1
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ObTempTableAccessOpInput::ObTempTableAccessOpInput(ObExecContext &ctx, const ObOpSpec &spec)
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: ObOpInput(ctx, spec),
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deserialize_allocator_(NULL),
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unfinished_count_ptr_(0),
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interm_result_ids_()
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{
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}
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ObTempTableAccessOpInput::~ObTempTableAccessOpInput()
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{
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deserialize_allocator_ = NULL;
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unfinished_count_ptr_ = 0;
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interm_result_ids_.reset();
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}
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void ObTempTableAccessOpInput::reset()
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{
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deserialize_allocator_ = NULL;
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unfinished_count_ptr_ = 0;
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interm_result_ids_.reset();
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}
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ObPhyOperatorType ObTempTableAccessOpInput::get_phy_op_type() const
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{
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return PHY_TEMP_TABLE_ACCESS;
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}
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void ObTempTableAccessOpInput::set_deserialize_allocator(common::ObIAllocator *allocator)
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{
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deserialize_allocator_ = allocator;
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}
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int ObTempTableAccessOpInput::init(ObTaskInfo &task_info)
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{
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int ret = OB_SUCCESS;
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UNUSED(task_info);
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return ret;
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}
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int ObTempTableAccessOpInput::check_finish(bool &is_end, int64_t &index)
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{
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int ret = OB_SUCCESS;
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uint64_t *count_ptr = reinterpret_cast<uint64_t *>(unfinished_count_ptr_);
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if (NULL != count_ptr) {
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index = ATOMIC_AAF(count_ptr, -1);
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if (-1 >= index) {
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is_end = true;
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} else {
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is_end = false;
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}
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} else {
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is_end = true;
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}
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return ret;
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}
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OB_DEF_SERIALIZE(ObTempTableAccessOpInput)
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{
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int ret = OK_;
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UNF_UNUSED_SER;
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BASE_SER(ObTempTableAccessOpInput);
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LST_DO_CODE(OB_UNIS_ENCODE, unfinished_count_ptr_);
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if (OB_SUCC(ret)) {
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if (OB_FAIL(serialization::encode_vi64(buf, buf_len, pos, interm_result_ids_.count()))) {
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LOG_WARN("fail to encode key ranges count", K(ret), K(interm_result_ids_));
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}
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for (int64_t i = 0; OB_SUCC(ret) && i < interm_result_ids_.count(); ++i) {
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if (OB_FAIL(serialization::encode_vi64(buf, buf_len, pos, interm_result_ids_.at(i)))) {
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LOG_WARN("fail to serialize key range", K(ret), K(i));
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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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OB_DEF_DESERIALIZE(ObTempTableAccessOpInput)
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{
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int ret = OK_;
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UNF_UNUSED_DES;
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BASE_DESER(ObTempTableAccessOpInput);
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LST_DO_CODE(OB_UNIS_DECODE, unfinished_count_ptr_);
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if (OB_SUCC(ret)) {
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int64_t count = 0;
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interm_result_ids_.reset();
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if (OB_FAIL(serialization::decode_vi64(buf, data_len, pos, &count))) {
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LOG_WARN("fail to decode key ranges count", K(ret));
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} else { /*do nothing.*/ }
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for (int64_t i = 0; OB_SUCC(ret) && i < count; i ++) {
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int64_t interm_result_id = 0;
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if (OB_ISNULL(deserialize_allocator_)) {
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ret = OB_NOT_INIT;
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LOG_WARN("deserialize allocator is NULL", K(ret));
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} else if (OB_FAIL(serialization::decode_vi64(buf, data_len, pos, &interm_result_id))) {
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LOG_WARN("failed to decode vi64.", K(ret));
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} else if (OB_FAIL(interm_result_ids_.push_back(interm_result_id))) {
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LOG_WARN("failed to push back into interm result ids.", K(ret));
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} else { /*do nothing.*/ }
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}
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}
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return ret;
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}
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OB_DEF_SERIALIZE_SIZE(ObTempTableAccessOpInput)
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{
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int64_t len = 0;
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BASE_ADD_LEN(ObTempTableAccessOpInput);
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LST_DO_CODE(OB_UNIS_ADD_LEN, unfinished_count_ptr_);
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len += serialization::encoded_length_vi64(interm_result_ids_.count());
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for (int64_t i = 0; i < interm_result_ids_.count(); ++i) {
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len += serialization::encoded_length_vi64(interm_result_ids_.at(i));
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}
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return len;
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}
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DEF_TO_STRING(ObTempTableAccessOpSpec)
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{
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int64_t pos = 0;
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J_OBJ_START();
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J_NAME("op_spec");
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J_COLON();
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pos += ObOpSpec::to_string(buf + pos, buf_len - pos);
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J_COMMA();
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J_KV(K(temp_table_id_),
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K(is_distributed_),
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K(output_indexs_),
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K(access_exprs_));
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J_OBJ_END();
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return pos;
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}
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OB_SERIALIZE_MEMBER_INHERIT(ObTempTableAccessOpSpec, ObOpSpec,
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output_indexs_,
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temp_table_id_,
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is_distributed_,
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access_exprs_);
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int ObTempTableAccessOp::inner_rescan()
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{
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int ret = OB_SUCCESS;
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int64_t result_id = 0;
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cur_idx_ = 0;
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is_started_ = false;
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can_rescan_ = true;
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if (!MY_SPEC.is_distributed_) {
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interm_result_ids_.reuse();
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if (OB_FAIL(get_local_interm_result_id(result_id))) {
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LOG_WARN("failed to get local result id", K(ret));
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} else if (OB_FAIL(interm_result_ids_.push_back(result_id))) {
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LOG_WARN("failed to push back result id", K(ret));
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}
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} else {
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int64_t index = 0;
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bool is_end = false;
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while (!is_end && OB_SUCC(ret)) {
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if (OB_FAIL(check_status())) {
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LOG_WARN("check status failed", K(ret));
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} else
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if (OB_FAIL(MY_INPUT.check_finish(is_end, index))) {
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LOG_WARN("failed to check finish.", K(ret));
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} else if (!is_end) {
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result_id = MY_INPUT.interm_result_ids_.at(index);
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if (OB_FAIL(interm_result_ids_.push_back(result_id))) {
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LOG_WARN("failed to push back result id", K(ret));
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}
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}
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}
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}
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if (OB_SUCC(ret) &&
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OB_FAIL(ObOperator::inner_rescan())) {
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LOG_WARN("failed to rescan", K(ret));
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}
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return ret;
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}
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int ObTempTableAccessOp::inner_open()
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{
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int ret = OB_SUCCESS;
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int64_t alloc_size = sizeof(ObChunkDatumStore::StoredRow *) * MY_SPEC.max_batch_size_;
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if (OB_UNLIKELY(MY_SPEC.output_indexs_.count() != MY_SPEC.access_exprs_.count())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("get unexpected error", K(ret), K(MY_SPEC.output_indexs_.count()),
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K(MY_SPEC.access_exprs_.count()));
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} else if (alloc_size > 0
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&& OB_ISNULL(stored_rows_ = static_cast<const ObChunkDatumStore::StoredRow **>
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(ctx_.get_allocator().alloc(alloc_size)))) {
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ret = OB_ALLOCATE_MEMORY_FAILED;
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LOG_WARN("allocate memory failed", K(ret), K(alloc_size));
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}
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return ret;
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}
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int ObTempTableAccessOp::inner_close()
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{
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int ret = OB_SUCCESS;
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datum_store_it_.reset();
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return ret;
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}
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void ObTempTableAccessOp::destroy()
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{
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result_info_guard_.reset();
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ObOperator::destroy();
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interm_result_ids_.reset();
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}
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int ObTempTableAccessOp::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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bool is_end = false;
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const ObChunkDatumStore::StoredRow *tmp_sr = NULL;
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if (OB_FAIL(THIS_WORKER.check_status())) {
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LOG_WARN("check physical plan status failed", K(ret));
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} else if (!is_started_ && OB_FAIL(locate_next_interm_result(is_end))) {
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LOG_WARN("failed to locate next interm result.", K(ret));
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}
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while (OB_SUCC(ret) && !is_end) {
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if (OB_FAIL(datum_store_it_.get_next_row(tmp_sr))) {
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if (OB_ITER_END != ret) {
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LOG_WARN("failed to get next row", K(ret));
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} else if (OB_FAIL(locate_next_interm_result(is_end))) {
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LOG_WARN("failed to locate next interm result.", K(ret));
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}
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} else {
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break;
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}
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}
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if (OB_SUCC(ret) && is_end) {
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ret = OB_ITER_END;
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} else if (OB_FAIL(ret)) {
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} else if (OB_ISNULL(tmp_sr)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("temp src row is null.", K(ret));
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} else if (OB_UNLIKELY(MY_SPEC.output_indexs_.count() != MY_SPEC.access_exprs_.count())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("get unexpected error", K(ret), K(MY_SPEC.output_indexs_.count()),
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K(MY_SPEC.access_exprs_.count()));
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} else {
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for (int64_t i = 0; OB_SUCC(ret) && i < MY_SPEC.output_indexs_.count(); ++i) {
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int64_t col_idx = MY_SPEC.output_indexs_.at(i);
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if (OB_UNLIKELY(col_idx >= tmp_sr->cnt_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("get unexpected error", K(ret), K(col_idx), K(tmp_sr->cnt_));
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} else if (OB_ISNULL(MY_SPEC.access_exprs_.at(i))) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("spec output is null.", K(ret));
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} else {
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MY_SPEC.access_exprs_.at(i)->locate_expr_datum(eval_ctx_) = tmp_sr->cells()[col_idx];
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MY_SPEC.access_exprs_.at(i)->set_evaluated_projected(eval_ctx_);
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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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int ObTempTableAccessOp::inner_get_next_batch(const int64_t max_row_cnt)
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{
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int ret = OB_SUCCESS;
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clear_evaluated_flag();
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clear_datum_eval_flag();
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bool is_end = false;
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int64_t read_rows = -1;
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if (OB_FAIL(THIS_WORKER.check_status())) {
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LOG_WARN("check physical plan status failed", K(ret));
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} else if (!is_started_ && OB_FAIL(locate_next_interm_result(is_end))) {
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LOG_WARN("failed to locate next interm result.", K(ret));
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}
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while (OB_SUCC(ret) && !is_end) {
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if (OB_FAIL(datum_store_it_.get_next_batch(stored_rows_,
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std::min(MY_SPEC.max_batch_size_, max_row_cnt), read_rows))) {
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if (OB_ITER_END != ret) {
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LOG_WARN("failed to get next row", K(ret));
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} else if (OB_FAIL(locate_next_interm_result(is_end))) {
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LOG_WARN("failed to locate next interm result.", K(ret));
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}
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} else {
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for (auto i = 0; OB_SUCC(ret) && i < MY_SPEC.output_indexs_.count(); ++i) {
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// performance critial: no nullptr check for access_exprs_.at(i)
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int64_t col_idx = MY_SPEC.output_indexs_.at(i);
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ObExpr *expr = MY_SPEC.access_exprs_.at(i);
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ObDatum *datums = expr->locate_batch_datums(eval_ctx_);
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if (expr->is_batch_result()) {
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for (auto j = 0; j < read_rows; j++) {
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datums[j] = stored_rows_[j]->cells()[col_idx];
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}
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} else {
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datums[0] = stored_rows_[0]->cells()[col_idx];
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}
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}
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break;
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}
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}
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if (OB_SUCC(ret)) {
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if (is_end) {
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brs_.size_ = 0;
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brs_.end_ = true;
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} else {
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brs_.size_ = read_rows;
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}
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}
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return ret;
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}
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int ObTempTableAccessOp::locate_next_interm_result(bool &is_end)
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{
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int ret = OB_SUCCESS;
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int64_t index = 0;
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int64_t result_id = 0;
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is_end = false;
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if (can_rescan_) {
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//rescan从context的缓存中拿result id
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if (cur_idx_ >= interm_result_ids_.count()) {
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is_end = true;
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} else {
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result_id = interm_result_ids_.at(cur_idx_);
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++cur_idx_;
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if (OB_FAIL(locate_interm_result(result_id))) {
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LOG_WARN("failed to get interm reuslt", K(ret));
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}
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}
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} else if (!MY_SPEC.is_distributed_) {
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//本地结果集从exec ctx中拿result id，并且缓存下来
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if (is_started_) {
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is_end = true;
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} else if (OB_FAIL(get_local_interm_result_id(result_id))) {
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LOG_WARN("failed to get local result id", K(ret));
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} else if (OB_FAIL(locate_interm_result(result_id))) {
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LOG_WARN("failed to get interm reuslt", K(ret));
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} else if (OB_FAIL(interm_result_ids_.push_back(result_id))) {
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LOG_WARN("failed to push back result id", K(ret));
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}
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} else {
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//分布式结果集从任务池抢占result id，并且缓存下来
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int64_t index = 0;
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if (OB_FAIL(MY_INPUT.check_finish(is_end, index))) {
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LOG_WARN("failed to check finish.", K(ret));
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} else if (!is_end) {
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result_id = MY_INPUT.interm_result_ids_.at(index);
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if (OB_FAIL(locate_interm_result(result_id))) {
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LOG_WARN("failed to get interm reuslt", K(ret));
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} else if (OB_FAIL(interm_result_ids_.push_back(result_id))) {
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LOG_WARN("failed to push back result id", K(ret));
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}
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}
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}
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if (OB_SUCC(ret) && !is_started_) {
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is_started_ = true;
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}
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return ret;
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}
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int ObTempTableAccessOp::locate_interm_result(int64_t result_id)
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{
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int ret = OB_SUCCESS;
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dtl::ObDTLIntermResultKey dtl_int_key;
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dtl::ObDTLIntermResultInfo *result_info = NULL;
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dtl_int_key.channel_id_ = result_id;
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datum_store_it_.reset();
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// The current operation of obtaining intermediate results and
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// the operation of the background thread of dumping intermediate results
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// are mutually exclusive
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if (OB_FAIL(MTL(dtl::ObDTLIntermResultManager*)->atomic_get_interm_result_info(
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dtl_int_key, result_info_guard_))) {
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LOG_WARN("failed to create row store.", K(ret));
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} else if (FALSE_IT(result_info = result_info_guard_.result_info_)) {
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// After getting the intermediate result, need to judge whether the result is readable.
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} else if (OB_SUCCESS != result_info->ret_) {
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ret = result_info->ret_;
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LOG_WARN("the interm result info meet a error", K(ret));
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} else if (!result_info->is_store_valid()) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("there is no row store in internal result", K(ret));
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} else if (OB_ISNULL(result_info->datum_store_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("datum store is null.", K(ret));
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} else if (OB_FAIL(result_info->datum_store_->begin(datum_store_it_))) {
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LOG_WARN("failed to begin chunk row store.", K(ret));
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} else { /*do nothing.*/ }
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return ret;
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}
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int ObTempTableAccessOp::get_local_interm_result_id(int64_t &result_id)
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{
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int ret = OB_SUCCESS;
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bool get_result_id = false;
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ObIArray<ObSqlTempTableCtx> &temp_table_ctx = get_exec_ctx().get_temp_table_ctx();
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for (int64_t i = 0; OB_SUCC(ret) && !get_result_id && i < temp_table_ctx.count(); ++i) {
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ObSqlTempTableCtx &temp_ctx = temp_table_ctx.at(i);
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if (temp_ctx.temp_table_id_ != MY_SPEC.temp_table_id_) {
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/* do nothing */
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} else if (OB_UNLIKELY(!temp_ctx.is_local_interm_result_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("local interm result ids is empty.", K(ret));
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} else if (temp_ctx.interm_result_infos_.count() != 1 ||
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temp_ctx.interm_result_infos_.at(0).interm_result_ids_.count() != 1) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("local interm result ids expect one.", K(ret));
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} else {
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// local_interm_result_ids_ count is 1 now.
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get_result_id = true;
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result_id = temp_ctx.interm_result_infos_.at(0).interm_result_ids_.at(0);
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}
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}
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if (OB_SUCC(ret) && !get_result_id) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("failed to get temp table interm result id ", K(ret));
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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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