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345 lines (327 loc) · 12.5 KB
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/**
* 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_OPT
#include "sql/optimizer/ob_log_for_update.h"
#include "sql/optimizer/ob_log_plan.h"
#include "sql/optimizer/ob_optimizer_util.h"
#include "sql/optimizer/ob_opt_est_cost.h"
#include "sql/optimizer/ob_log_table_scan.h"
using namespace oceanbase;
using namespace sql;
using namespace oceanbase::common;
ObLogForUpdate::ObLogForUpdate(ObLogPlan &plan)
: ObLogicalOperator(plan),
skip_locked_(false),
is_multi_part_dml_(false),
gi_charged_(false),
wait_ts_(-1),
lock_rownum_(NULL),
index_dml_info_()
{}
const char* ObLogForUpdate::get_name() const
{
const char *ret = "NOT SET";
if (is_multi_part_dml()) {
ret = "DISTRIBUTED FOR UPDATE";
} else {
ret = "FOR UPDATE";
}
return ret;
}
int ObLogForUpdate::get_plan_item_info(PlanText &plan_text,
ObSqlPlanItem &plan_item)
{
int ret = OB_SUCCESS;
const ObDMLStmt *stmt = NULL;
if (OB_ISNULL(get_plan()) || OB_ISNULL(stmt = get_plan()->get_stmt())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("stmt is null", K(ret));
} else if (OB_FAIL(ObLogicalOperator::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(BUF_PRINTF("lock tables"))) {
LOG_WARN("BUF_PRINTF fails", K(ret));
}
for (int64_t i = 0; OB_SUCC(ret) && i < index_dml_info_.count(); ++i) {
TableItem *table = NULL;
if (OB_ISNULL(index_dml_info_.at(i)) ||
OB_ISNULL(table = stmt->get_table_item_by_id(index_dml_info_.at(i)->table_id_))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("index dml info is null", K(ret), K(index_dml_info_.at(i)), K(table));
} else if (OB_FAIL(BUF_PRINTF("%c%.*s%c",
i == 0 ? '(' : ' ',
table->get_table_name().length(),
table->get_table_name().ptr(),
i == index_dml_info_.count() - 1 ? ')' : ','))) {
LOG_WARN("failed to print lock table name", K(ret));
}
}
END_BUF_PRINT(plan_item.special_predicates_,
plan_item.special_predicates_len_);
}
return ret;
}
int ObLogForUpdate::compute_sharding_info()
{
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 if (OB_FAIL(ObLogicalOperator::compute_sharding_info())) {
LOG_WARN("failed to compute sharding info", K(ret));
} else if (OB_ISNULL(get_sharding())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else {
is_partition_wise_ = !is_multi_part_dml_ && !child->is_exchange_allocated() &&
get_sharding()->is_distributed() &&
NULL != get_sharding()->get_phy_table_location_info();
}
return ret;
}
int ObLogForUpdate::allocate_granule_pre(AllocGIContext &ctx)
{
return pw_allocate_granule_pre(ctx);
}
int ObLogForUpdate::allocate_granule_post(AllocGIContext &ctx)
{
int ret = OB_SUCCESS;
bool is_partition_wise_state = ctx.is_in_partition_wise_state();
if (OB_ISNULL(get_plan())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else if (OB_FAIL(pw_allocate_granule_post(ctx))) { // 分配完GI以后，会对ctx的状态进行清理
LOG_WARN("failed to allocate pw gi post", K(ret));
} else {
if (is_partition_wise_state && ctx.is_op_set_pw(this)) {
ObSEArray<ObLogicalOperator *, 2> tsc_ops;
if (OB_FAIL(find_all_tsc(tsc_ops, this))) {
LOG_WARN("failed to find all tsc", K(ret));
} else if (tsc_ops.count() < 1){
// do nothing
set_gi_above(true);
} else {
// tsc op与当前dml算子都需要set gi above
ARRAY_FOREACH(tsc_ops, idx) {
ObLogTableScan *tsc_op = static_cast<ObLogTableScan*>(tsc_ops.at(idx));
tsc_op->set_gi_above(true);
}
set_gi_above(true);
}
} else {
LOG_TRACE("not allocate dml gi for px",
K(ret), K(ctx), K(ctx.is_op_set_pw(this)));
}
}
return ret;
}
int ObLogForUpdate::get_op_exprs(ObIArray<ObRawExpr*> &all_exprs)
{
int ret = OB_SUCCESS;
if (is_multi_part_dml() && OB_FAIL(generate_multi_part_partition_id_expr())) {
LOG_WARN("failed to generate update expr", K(ret));
} else if (OB_FAIL(get_for_update_dependant_exprs(all_exprs))) {
LOG_WARN("failed to get for update dependant exprs", K(ret));
} else if (NULL != lock_rownum_ && OB_FAIL(all_exprs.push_back(lock_rownum_))) {
LOG_WARN("failed to push back exprs", K(ret));
} else if (OB_FAIL(ObLogicalOperator::get_op_exprs(all_exprs))) {
LOG_WARN("failed to get op exprs", K(ret));
} else { /*do nothing*/ }
return ret;
}
int ObLogForUpdate::generate_multi_part_partition_id_expr()
{
int ret = OB_SUCCESS;
if (OB_ISNULL(get_stmt()) || OB_ISNULL(get_plan())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(get_stmt()), K(ret));
}
for (int64_t i = 0; OB_SUCC(ret) && i < index_dml_info_.count(); ++i) {
const TableItem *table_item = NULL;
ObRawExpr *part_expr = NULL;
if (OB_ISNULL(index_dml_info_.at(i)) ||
OB_ISNULL(table_item = get_stmt()->get_table_item_by_id(
index_dml_info_.at(i)->table_id_))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret), K(index_dml_info_.at(i)), K(table_item));
} else if (OB_FAIL(get_plan()->gen_calc_part_id_expr(table_item->table_id_,
table_item->ref_id_,
CALC_PARTITION_TABLET_ID,
part_expr))) {
LOG_WARN("failed to gen calc part id expr", K(ret));
} else if (OB_ISNULL(part_expr)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else {
index_dml_info_.at(i)->old_part_id_expr_ = part_expr;
}
}
return ret;
}
int ObLogForUpdate::get_for_update_dependant_exprs(ObIArray<ObRawExpr*> &dep_exprs)
{
int ret = OB_SUCCESS;
if (OB_ISNULL(get_stmt())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else {
const TableItem *table_item = NULL;
for (int64_t i = 0; OB_SUCC(ret) && i < index_dml_info_.count(); i++) {
if (OB_ISNULL(index_dml_info_.at(i))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("index dml info is null", K(ret));
} else if (OB_FAIL(append(dep_exprs, index_dml_info_.at(i)->column_exprs_))) {
LOG_WARN("failed to append rowkey expr", K(ret));
} else if (!is_multi_part_dml()) {
/*do nothing*/
} else if (NULL != index_dml_info_.at(i)->old_part_id_expr_ &&
OB_FAIL(dep_exprs.push_back(index_dml_info_.at(i)->old_part_id_expr_))) {
LOG_WARN("failed to push back old partition id expr", K(ret));
} else { /*do nothing*/ }
}
// mark expr reference
for (int64_t i = 0; OB_SUCC(ret) && i < dep_exprs.count(); i++) {
if (OB_ISNULL(dep_exprs.at(i))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else {
dep_exprs.at(i)->set_explicited_reference();
}
}
}
return ret;
}
int ObLogForUpdate::est_cost()
{
int ret = OB_SUCCESS;
ObLogicalOperator *first_child = NULL;
if (OB_ISNULL(get_plan()) ||
OB_ISNULL(first_child = get_child(ObLogicalOperator::first_child))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("first child is null", K(ret));
} else {
// todo: refine for update cost
ObOptimizerContext &opt_ctx = get_plan()->get_optimizer_context();
set_op_cost(ObOptEstCost::cost_get_rows(first_child->get_card(), opt_ctx));
set_cost(first_child->get_cost() + op_cost_);
set_card(first_child->get_card());
}
return ret;
}
int ObLogForUpdate::compute_op_ordering()
{
int ret = OB_SUCCESS;
ObLogicalOperator *child = NULL;
if (OB_ISNULL(child = get_child(first_child))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("Child is null", K(ret));
} else if (OB_FAIL(set_op_ordering(child->get_op_ordering()))) {
LOG_WARN("Failed to set op ordering", K(ret));
}
return ret;
}
int ObLogForUpdate::get_table_columns(const uint64_t table_id,
ObIArray<ObColumnRefRawExpr *> &table_cols) const
{
int ret = OB_SUCCESS;
if (OB_ISNULL(get_stmt())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("stmt is null", K(ret));
} else if (OB_FAIL(get_stmt()->get_column_exprs(table_id, table_cols))) {
LOG_WARN("failed to get column exprs", K(ret));
}
for (int64_t i = table_cols.count() - 1; OB_SUCC(ret) && i >= 0; --i) {
if (OB_ISNULL(table_cols.at(i))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("table column is null", K(ret), K(table_cols.at(i)));
} else if (!IS_SHADOW_COLUMN(table_cols.at(i)->get_column_id())) {
// do nothing
} else if (OB_FAIL(table_cols.remove(i))) {
LOG_WARN("failed to remove column expr", K(ret));
}
}
return ret;
}
int ObLogForUpdate::get_rowkey_exprs(const uint64_t table_id,
ObIArray<ObColumnRefRawExpr *> &rowkey) const
{
int ret = OB_SUCCESS;
for (int64_t i = 0; OB_SUCC(ret) && i < index_dml_info_.count(); ++i) {
if (OB_ISNULL(index_dml_info_.at(i))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("index dml info is null", K(ret));
} else if (index_dml_info_.at(i)->table_id_ != table_id) {
// do nothing
} else if (OB_FAIL(append(rowkey, index_dml_info_.at(i)->column_exprs_))) {
LOG_WARN("failed to append rowkey expr", K(ret));
} else {
break;
}
}
return ret;
}
int ObLogForUpdate::is_rowkey_nullable(const uint64_t table_id, bool &is_nullable) const
{
int ret = OB_SUCCESS;
is_nullable = false;
if (OB_FAIL(ObOptimizerUtil::is_table_on_null_side(get_stmt(),
table_id,
is_nullable))) {
LOG_WARN("failed to check is table on null side", K(ret));
}
return ret;
}
bool ObLogForUpdate::is_multi_table_skip_locked()
{
bool is_multi_table_skip_locked = false;
if (index_dml_info_.count() > 1 && is_skip_locked()) {
is_multi_table_skip_locked = true;
}
return is_multi_table_skip_locked;
}
int ObLogForUpdate::inner_replace_op_exprs(ObRawExprReplacer &replacer)
{
int ret = OB_SUCCESS;
for (int64_t i = 0; OB_SUCC(ret) && i < index_dml_info_.count(); ++i) {
IndexDMLInfo *dml_info = index_dml_info_.at(i);
if (OB_ISNULL(dml_info)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("dml info is null", K(ret));
} else if (OB_FAIL(replace_exprs_action(replacer, dml_info->ck_cst_exprs_))) {
LOG_WARN("failed to replace exprs", K(ret));
} else if (NULL != dml_info->new_part_id_expr_ &&
OB_FAIL(replace_expr_action(replacer, dml_info->new_part_id_expr_))) {
LOG_WARN("failed to replace new parititon id expr", K(ret));
} else if (NULL != dml_info->old_part_id_expr_ &&
OB_FAIL(replace_expr_action(replacer, dml_info->old_part_id_expr_))) {
LOG_WARN("failed to replace old parititon id expr", K(ret));
} else if (NULL != dml_info->old_rowid_expr_ &&
OB_FAIL(replace_expr_action(replacer, dml_info->old_rowid_expr_))) {
LOG_WARN("failed to replace old rowid expr", K(ret));
} else if (NULL != dml_info->new_rowid_expr_ &&
OB_FAIL(replace_expr_action(replacer, dml_info->new_rowid_expr_))) {
LOG_WARN("failed to replace new rowid expr", K(ret));
} else if (OB_FAIL(replace_exprs_action(replacer, dml_info->column_convert_exprs_))) {
LOG_WARN("failed to replace exprs", K(ret));
} else if (OB_FAIL(replace_exprs_action(replacer, dml_info->column_old_values_exprs_))) {
LOG_WARN("failed to replace column old values exprs ", K(ret));
}
for (int64_t j = 0; OB_SUCC(ret) && j < dml_info->assignments_.count(); ++j) {
if (OB_FAIL(replace_expr_action(replacer, dml_info->assignments_.at(j).expr_))) {
LOG_WARN("failed to replace expr", K(ret));
}
}
}
return ret;
}