136 lines
4.4 KiB
C++
136 lines
4.4 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_OPT
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#include "ob_log_sequence.h"
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#include "ob_log_operator_factory.h"
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#include "ob_optimizer_util.h"
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#include "sql/optimizer/ob_opt_est_cost.h"
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#include "sql/optimizer/ob_join_order.h"
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#include "common/ob_smart_call.h"
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using namespace oceanbase::sql;
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using namespace oceanbase::common;
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using namespace oceanbase::sql::log_op_def;
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int ObLogSequence::get_op_exprs(ObIArray<ObRawExpr*> &all_exprs)
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{
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int ret = OB_SUCCESS;
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const ObDMLStmt *stmt = NULL;
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if (OB_ISNULL(stmt = get_stmt())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("stmt is null", K(ret), K(get_stmt()));
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} else if (OB_FAIL(stmt->get_sequence_exprs(all_exprs))) {
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LOG_WARN("fail get sequence exprs", K(ret));
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} else if (OB_FAIL(ObLogicalOperator::get_op_exprs(all_exprs))) {
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LOG_WARN("failed to get exprs", K(ret));
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} else { /*do nothing*/ }
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return ret;
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}
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int ObLogSequence::est_cost()
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{
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int ret = OB_SUCCESS;
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ObLogicalOperator *child = NULL;
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if (OB_ISNULL(get_plan())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("get unexpected null", K(ret));
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} else {
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ObOptimizerContext &opt_ctx = get_plan()->get_optimizer_context();
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if (0 == get_num_of_child()) {
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op_cost_ = ObOptEstCost::cost_sequence(0,
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nextval_seq_ids_.count(),
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opt_ctx);
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cost_ = op_cost_;
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card_ = 0.0;
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} else if (OB_ISNULL(child = get_child(first_child))) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("get unexpected null", K(ret));
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} else {
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op_cost_ = ObOptEstCost::cost_sequence(child->get_card(),
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nextval_seq_ids_.count(),
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opt_ctx);
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cost_ = op_cost_ + child->get_cost();
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card_ = child->get_card();
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}
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}
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return ret;
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}
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int ObLogSequence::est_width()
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{
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int ret = OB_SUCCESS;
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ObLogicalOperator *child = NULL;
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double width = 0.0;
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if (0 == get_num_of_child()) {
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width = 0.0;
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} else if (OB_ISNULL(child = get_child(ObLogicalOperator::first_child))) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("get unexpected null", K(child), K(ret));
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} else {
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width = child->get_width() + nextval_seq_ids_.count() * 8;
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}
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set_width(width);
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return ret;
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}
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int ObLogSequence::do_re_est_cost(EstimateCostInfo ¶m, double &card, double &op_cost, double &cost)
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{
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int ret = OB_SUCCESS;
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double child_card = 0.0;
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double child_cost = 0.0;
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ObLogicalOperator *child = get_child(ObLogicalOperator::first_child);
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if (0 == get_num_of_child()) {
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card = get_card();
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op_cost = get_op_cost();
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cost = get_cost();
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} else if (OB_ISNULL(get_plan()) || OB_ISNULL(child)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("get unexpected null", K(ret), K(get_plan()), K(child));
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} else if (OB_FAIL(SMART_CALL(child->re_est_cost(param, child_card, child_cost)))) {
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LOG_WARN("failed to re est cost", K(ret));
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} else {
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op_cost = ObOptEstCost::cost_sequence(child_card,
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nextval_seq_ids_.count(),
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get_plan()->get_optimizer_context());
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cost = child_cost + op_cost;
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card = child_card;
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}
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return ret;
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}
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int ObLogSequence::compute_op_parallel_and_server_info()
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{
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int ret = common::OB_SUCCESS;
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if (get_num_of_child() == 0) {
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ret = set_parallel_and_server_info_for_match_all();
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} else {
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ret = ObLogicalOperator::compute_op_parallel_and_server_info();
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}
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return ret;
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}
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int ObLogSequence::is_my_fixed_expr(const ObRawExpr *expr, bool &is_fixed)
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{
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int ret = OB_SUCCESS;
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is_fixed = false;
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ObSEArray<ObRawExpr*, 8> sequence_exprs;
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if (OB_ISNULL(get_stmt())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("stmt is null", K(ret), K(get_stmt()));
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} else if (OB_FAIL(get_stmt()->get_sequence_exprs(sequence_exprs))) {
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LOG_WARN("fail get sequence exprs", K(ret));
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} else {
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is_fixed = ObOptimizerUtil::find_item(sequence_exprs, expr);
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}
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return ret;
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}
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