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Copy pathob_log_delete.cpp
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203 lines (189 loc) · 6.55 KB
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/*
* Copyright (c) 2025 OceanBase.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define USING_LOG_PREFIX SQL_OPT
#include "ob_log_delete.h"
#include "sql/optimizer/ob_join_order.h"
using namespace oceanbase;
using namespace sql;
using namespace oceanbase::common;
const char *ObLogDelete::get_name() const
{
const char *name = NULL;
if (is_multi_part_dml()) {
name = "DISTRIBUTED DELETE";
} else if (is_pdml() && is_index_maintenance()) {
// PDML index table delete, using INDEX DELETE
name = "INDEX DELETE";
} else {
// Default Delete name: DELETE
// PDML main table's delete, also default to use name: DELETE
name = ObLogDelUpd::get_name();
}
return name;
}
int ObLogDelete::est_cost()
{
int ret = OB_SUCCESS;
ObLogicalOperator *child = NULL;
if (OB_ISNULL(child = get_child(ObLogicalOperator::first_child))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("child is null", K(ret), K(child));
} else {
double op_cost = 0.0;
if (OB_FAIL(inner_est_cost(child->get_card(), op_cost))) {
LOG_WARN("failed to get delete cost", K(ret));
} else {
set_op_cost(op_cost);
set_cost(child->get_cost() + get_op_cost());
set_card(child->get_card());
}
}
return ret;
}
int ObLogDelete::do_re_est_cost(EstimateCostInfo ¶m, double &card, double &op_cost, double &cost)
{
int ret = OB_SUCCESS;
ObLogicalOperator *child = NULL;
if (OB_ISNULL(child = get_child(ObLogicalOperator::first_child))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(child), K(ret));
} else {
double child_card = child->get_card();
double child_cost = child->get_cost();
if (OB_FAIL(SMART_CALL(child->re_est_cost(param, child_card, child_cost)))) {
LOG_WARN("failed to re est exchange cost", K(ret));
} else if (OB_FAIL(inner_est_cost(child_card, op_cost))) {
LOG_WARN("failed to get delete cost", K(ret));
} else {
cost = child_cost + op_cost;
card = child_card;
}
}
return ret;
}
int ObLogDelete::inner_est_cost(double child_card, double &op_cost)
{
int ret = OB_SUCCESS;
if (OB_ISNULL(get_plan())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret), K(get_plan()));
} else if (OB_FAIL(inner_est_cost(get_plan()->get_optimizer_context(),
get_index_dml_infos(),
child_card,
op_cost))) {
LOG_WARN("failed to get delete cost", K(ret));
}
return ret;
}
int ObLogDelete::inner_est_cost(const ObOptimizerContext &opt_ctx,
const ObIArray<IndexDMLInfo*> &index_infos,
const double child_card,
double &op_cost)
{
int ret = OB_SUCCESS;
ObDelUpCostInfo cost_info(0,0,0);
cost_info.affect_rows_ = child_card;
cost_info.index_count_ = index_infos.count();
IndexDMLInfo* delete_dml_info = nullptr;
if (OB_UNLIKELY(cost_info.index_count_ <= 0) ||
OB_ISNULL(delete_dml_info = index_infos.at(0))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret), K(delete_dml_info));
} else if (OB_FALSE_IT(cost_info.constraint_count_ = delete_dml_info->ck_cst_exprs_.count())) {
} else if (OB_FAIL(ObOptEstCost::cost_delete(cost_info, op_cost, opt_ctx))) {
LOG_WARN("failed to get delete cost", K(ret));
}
return ret;
}
int ObLogDelete::get_op_exprs(ObIArray<ObRawExpr*> &all_exprs)
{
int ret = OB_SUCCESS;
if (OB_FAIL(ObLogDelUpd::inner_get_op_exprs(all_exprs, true))) {
LOG_WARN("failed to get op exprs", K(ret));
} else { /*do nothing*/ }
return ret;
}
int ObLogDelete::is_my_fixed_expr(const ObRawExpr *expr, bool &is_fixed)
{
int ret = OB_SUCCESS;
if (OB_FAIL(is_dml_fixed_expr(expr, get_index_dml_infos(), is_fixed))) {
LOG_WARN("failed to check is my fixed expr", K(ret));
}
return ret;
}
int ObLogDelete::generate_multi_part_partition_id_expr()
{
int ret = OB_SUCCESS;
for (int64_t i = 0; OB_SUCC(ret) && i < get_index_dml_infos().count(); ++i) {
if (OB_ISNULL(get_index_dml_infos().at(i))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("index dml info is null", K(ret));
} else if (OB_FAIL(generate_old_calc_partid_expr(*get_index_dml_infos().at(i)))) {
LOG_WARN("failed to generate calc partid expr", K(ret));
} else { /*do nothing*/ }
}
return ret;
}
int ObLogDelete::generate_part_id_expr_for_foreign_key(ObIArray<ObRawExpr*> &all_exprs)
{
// NOTE: for delete parent table, don't support foregin key checks use das task now,
// no need to generate part id expr, do nothing here
int ret = OB_SUCCESS;
return ret;
}
int ObLogDelete::get_plan_item_info(PlanText &plan_text,
ObSqlPlanItem &plan_item)
{
int ret = OB_SUCCESS;
if (OB_FAIL(ObLogDelUpd::get_plan_item_info(plan_text, plan_item))) {
LOG_WARN("failed to get plan item info", K(ret));
} else {
BEGIN_BUF_PRINT;
if (OB_FAIL(print_table_infos(ObString::make_string("table_columns"),
buf,
buf_len,
pos,
type))) {
LOG_WARN("failed to print table infos", K(ret));
} else if (need_barrier()) {
ret = BUF_PRINTF(", ");
ret = BUF_PRINTF("with_barrier");
}
if (OB_SUCC(ret) && get_das_dop() > 0) {
ret = BUF_PRINTF(", das_dop=%ld", this->get_das_dop());
}
END_BUF_PRINT(plan_item.special_predicates_,
plan_item. special_predicates_len_);
}
return ret;
}
int ObLogDelete::op_is_update_pk_with_dop(bool &is_update)
{
int ret = OB_SUCCESS;
is_update = false;
if (!index_dml_infos_.empty()) {
IndexDMLInfo *index_dml_info = index_dml_infos_.at(0);
if (OB_ISNULL(index_dml_info)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected nullptr", K(ret), K(index_dml_infos_));
} else if (!is_pdml_update_split_) {
// is_update = false;
} else if (index_dml_info->is_update_primary_key_ && (is_pdml() || get_das_dop() > 1)) {
is_update = true;
}
}
return ret;
}