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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_del_upd_log_plan.h"
#include "sql/resolver/dml/ob_insert_stmt.h"
#include "ob_log_insert.h"
#include "lib/container/ob_se_array.h"
#include "lib/container/ob_se_array_iterator.h"
#include "sql/ob_phy_table_location.h"
#include "sql/code_generator/ob_expr_generator_impl.h"
#include "sql/ob_sql_utils.h"
#include "sql/optimizer/ob_log_plan.h"
#include "sql/optimizer/ob_select_log_plan.h"
#include "sql/optimizer/ob_log_table_scan.h"
#include "sql/optimizer/ob_log_exchange.h"
#include "sql/engine/expr/ob_expr_column_conv.h"
#include "sql/optimizer/ob_log_sort.h"
#include "sql/rewrite/ob_transform_utils.h"
#include "sql/optimizer/ob_insert_log_plan.h"
#include "common/ob_smart_call.h"
using namespace oceanbase;
using namespace sql;
using namespace oceanbase::common;
using namespace share;
using namespace oceanbase::share::schema;
/**
* Print log info with expressions
*/
#define EXPLAIN_PRINT_COLUMN_ITEMS(columns, type) \
{ \
if (NULL != columns) { \
BUF_PRINTF(#columns"("); \
int64_t N = columns->count(); \
if (N == 0) { \
BUF_PRINTF("nil"); \
} else { \
for (int64_t i = 0; i < N; i++) { \
BUF_PRINTF("["); \
if (NULL != columns->at(i)) { \
if (OB_FAIL(columns->at(i)->get_name(buf, buf_len, pos, type))) { \
} \
} \
BUF_PRINTF("]"); \
if (i < N - 1) { \
BUF_PRINTF(", "); \
} \
} \
} \
BUF_PRINTF(")"); \
} else { \
} \
}
const char* ObLogInsert::get_name() const
{
const char *ret = "NOT SET";
if (is_replace_) {
if (is_multi_part_dml()) {
ret = "DISTRIBUTED REPLACE";
} else {
ret = "REPLACE";
}
} else if (!insert_up_) {
if (is_multi_part_dml()) {
ret = "DISTRIBUTED INSERT";
} else if (is_pdml() && is_index_maintenance()) {
ret = "INDEX INSERT";
} else {
ret = "INSERT";
}
} else {
if (is_multi_part_dml()) {
ret = "DISTRIBUTED INSERT_UP";
} else {
ret = "INSERT_UP";
}
}
return ret;
}
int ObLogInsert::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("columns"),
buf,
buf_len,
pos,
type))) {
LOG_WARN("failed to print table info", K(ret));
} else if (NULL != table_partition_info_) {
if (OB_FAIL(BUF_PRINTF(", "))) {
LOG_WARN("BUG_PRINTF fails", K(ret));
} else if (OB_FAIL(explain_print_partitions(*table_partition_info_,
buf,
buf_len,
pos))) {
LOG_WARN("Failed to print partitions");
} else { }//do nothing
}
// print column convert exprs
if (OB_SUCC(ret) && !get_index_dml_infos().empty() && NULL != get_index_dml_infos().at(0)) {
const ObIArray<ObRawExpr *> &column_values = get_index_dml_infos().at(0)->column_convert_exprs_;
if(OB_FAIL(BUF_PRINTF(", "))) {
LOG_WARN("BUG_PRINTF fails", K(ret));
} else if (OB_FAIL(BUF_PRINTF("\n "))) {
LOG_WARN("BUG_PRINTF fails", K(ret));
} else {
EXPLAIN_PRINT_EXPRS(column_values, type);
}
}
if (OB_SUCC(ret) && insert_up_ ) {
const IndexDMLInfo *table_insert_info = get_insert_up_index_dml_infos().at(0);
if (OB_ISNULL(table_insert_info)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("index dml info is null", K(ret));
} else if (OB_FAIL(BUF_PRINTF(",\n"))) {
LOG_WARN("BUG_PRINTF fails", K(ret));
} else if (OB_FAIL(BUF_PRINTF(" update("))) {
LOG_WARN("BUG_PRINTF fails", K(ret));
} else if (OB_FAIL(print_assigns(table_insert_info->assignments_,
buf,
buf_len,
pos,
type))) {
LOG_WARN("failed to print assigns", K(ret));
} else { /* Do nothing */ }
BUF_PRINTF(")");
} else { /* Do nothing */ }
END_BUF_PRINT(plan_item.special_predicates_,
plan_item.special_predicates_len_);
}
return ret;
}
uint64_t ObLogInsert::hash(uint64_t seed) const
{
seed = do_hash(is_replace_, seed);
seed = do_hash(insert_up_, seed);
seed = ObLogDelUpd::hash(seed);
return seed;
}
int ObLogInsert::get_op_exprs(ObIArray<ObRawExpr*> &all_exprs)
{
int ret = OB_SUCCESS;
if (OB_ISNULL(get_stmt())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
// TODO @yibo split log insert and log insert all
} else if (get_stmt()->is_insert_stmt() && OB_FAIL(get_constraint_info_exprs(all_exprs))) {
LOG_WARN("failed to add duplicate key checker exprs to ctx", K(ret));
} else if (OB_FAIL(ObLogDelUpd::inner_get_op_exprs(all_exprs, false))) {
LOG_WARN("failed to get op exprs", K(ret));
} else if (is_replace() && OB_FAIL(get_table_columns_exprs(get_replace_index_dml_infos(),
all_exprs,
true))) {
LOG_WARN("failed to add table columns to ctx", K(ret));
} else if (get_insert_up() && OB_FAIL(get_table_columns_exprs(get_insert_up_index_dml_infos(),
all_exprs,
true))) {
LOG_WARN("failed to add table columns to ctx", K(ret));
} else { /*do nothing*/ }
return ret;
}
int ObLogInsert::compute_sharding_info()
{
int ret = OB_SUCCESS;
if (OB_ISNULL(get_plan())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else if (NULL != get_sharding()) {
is_partition_wise_ = true;
} else if (is_multi_part_dml()) {
strong_sharding_ = get_plan()->get_optimizer_context().get_local_sharding();
} else if (OB_FAIL(ObLogDelUpd::compute_sharding_info())) {
LOG_WARN("failed to compute sharding info", K(ret));
} else { /*do nothing*/ }
return ret;
}
int ObLogInsert::compute_plan_type()
{
int ret = OB_SUCCESS;
ObLogicalOperator *child = NULL;
if (OB_ISNULL(child = get_child(first_child)) || OB_ISNULL(get_plan())
|| OB_ISNULL(get_plan()->get_stmt())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(child), K(get_plan()), K(ret));
} else if (OB_FAIL(ObLogDelUpd::compute_plan_type())) {
LOG_WARN("failed to compute plan type", K(ret));
} else if (is_multi_part_dml() && log_op_def::LOG_INSERT_ALL != get_type() &&
ObPhyPlanType::OB_PHY_PLAN_DISTRIBUTED != phy_plan_type_ &&
!get_plan()->get_stmt()->has_instead_of_trigger() &&
is_insert_select()) {
// 包含instead of trigger的view是没有table_partition_info_的,不需要走下面的逻辑
ObTableLocationType location_type = OB_TBL_LOCATION_UNINITIALIZED;
ObAddr &server = get_plan()->get_optimizer_context().get_local_server_addr();
if (OB_ISNULL(table_partition_info_)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else if (OB_FAIL(table_partition_info_->get_location_type(server, location_type))) {
LOG_WARN("get location type failed", K(ret));
} else if (child->is_local() && ObTableLocationType::OB_TBL_LOCATION_REMOTE == location_type ) {
// 特殊insert case处理：insert table是remote，child对应的是local，需要将计划设置为dist plan
phy_plan_type_ = ObPhyPlanType::OB_PHY_PLAN_DISTRIBUTED;
exchange_allocated_ = true;
} else { /*do nothing*/ }
}
return ret;
}
int ObLogInsert::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));
} else {
double op_cost = 0.0;
if (OB_FAIL(inner_est_cost(child->get_card(), op_cost))) {
LOG_WARN("failed to get insert 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 ObLogInsert::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 insert cost", K(ret));
} else {
cost = child_cost + op_cost;
card = child_card;
}
}
return ret;
}
int ObLogInsert::inner_est_cost(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_ = get_index_dml_infos().count();
if (0 == cost_info.index_count_) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected index count", K(ret), K(get_index_dml_infos()));
} else {
const IndexDMLInfo *insert_dml_info = get_index_dml_infos().at(0);
if (OB_ISNULL(insert_dml_info)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else if (get_insert_up()) {
if (get_insert_up_index_dml_infos().empty()) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("insert_up_index_dml_infos is empty", K(ret));
} else {
const IndexDMLInfo *upd_pri_dml_info = get_insert_up_index_dml_infos().at(0);
if (OB_ISNULL(upd_pri_dml_info)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("ins_pri_dml_info or upd_pri_dml_info is null", K(ret));
} else {
cost_info.constraint_count_ = insert_dml_info->ck_cst_exprs_.count()
+ upd_pri_dml_info->ck_cst_exprs_.count();
}
}
} else {
cost_info.constraint_count_ = insert_dml_info->ck_cst_exprs_.count();
}
}
if (OB_ISNULL(get_plan())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else {
ObOptimizerContext &opt_ctx = get_plan()->get_optimizer_context();
if (OB_FAIL(ObOptEstCost::cost_insert(cost_info,
op_cost,
opt_ctx))) {
LOG_WARN("failed to get insert cost", K(ret));
}
}
return ret;
}
int ObLogInsert::get_constraint_info_exprs(ObIArray<ObRawExpr*> &all_exprs)
{
int ret = OB_SUCCESS;
ObSEArray<ObRawExpr*, 8> temp_exprs;
if (OB_ISNULL(get_stmt()) || OB_UNLIKELY(!get_stmt()->is_insert_stmt())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else if (NULL != constraint_infos_) {
for (int64_t i = 0; OB_SUCC(ret) && i < constraint_infos_->count(); ++i) {
const ObIArray<ObColumnRefRawExpr*> &constraint_columns =
constraint_infos_->at(i).constraint_columns_;
temp_exprs.reuse();
if (OB_FAIL(append(temp_exprs, constraint_columns))) {
LOG_WARN("failed to append exprs", K(ret));
} else if (OB_FAIL(append_array_no_dup(all_exprs, temp_exprs))) {
LOG_WARN("failed to append exprs", K(ret));
}
}
}
return ret;
}
int ObLogInsert::generate_rowid_expr_for_trigger()
{
int ret = OB_SUCCESS;
// oracle mode does not have replace or insert on duplicate
if (lib::is_oracle_mode() && !has_instead_of_trigger()) {
for (int64_t i = 0; OB_SUCC(ret) && i < get_index_dml_infos().count(); ++i) {
bool has_trg = false;
IndexDMLInfo *dml_info = get_index_dml_infos().at(i);
if (OB_ISNULL(dml_info)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("dml info is null", K(ret), K(dml_info));
} else if (!dml_info->is_primary_index_) {
// do nothing
} else if (OB_FAIL(check_has_trigger(dml_info->ref_table_id_, has_trg))) {
LOG_WARN("failed to check has trigger", K(ret));
} else if (!has_trg) {
// do nothing
} else if (OB_FAIL(generate_old_rowid_expr(*dml_info))) {
LOG_WARN("failed to generate rowid expr", K(ret));
} else if (OB_FAIL(generate_insert_new_rowid_expr(*dml_info))) {
LOG_WARN("failed to generate new rowid expr", K(ret));
} else { /*do nothing*/ }
}
}
return ret;
}
int ObLogInsert::generate_part_id_expr_for_foreign_key(ObIArray<ObRawExpr*> &all_exprs)
{
int ret = OB_SUCCESS;
for (int64_t i = 0; OB_SUCC(ret) && i < get_index_dml_infos().count(); ++i) {
IndexDMLInfo *dml_info = get_index_dml_infos().at(i);
if (OB_ISNULL(dml_info)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("dml info is null", K(ret), K(dml_info));
} else if (!dml_info->is_primary_index_) {
// do nothing
} else if (OB_FAIL(generate_fk_lookup_part_id_expr(*dml_info))) {
LOG_WARN("failed to generate lookup part expr for foreign key", K(ret));
} else if (OB_FAIL(convert_insert_new_fk_lookup_part_id_expr(all_exprs, *dml_info))) {
LOG_WARN("failed to convert lookup part expr for foreign key", K(ret));
}
}
if (OB_FAIL(ret)) {
/*do nothing*/
} else if (is_replace()) {
for (int64_t i = 0; OB_SUCC(ret) && i < get_replace_index_dml_infos().count(); ++i) {
IndexDMLInfo *dml_info = get_replace_index_dml_infos().at(i);
if (OB_ISNULL(dml_info)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("dml info is null", K(ret), K(dml_info));
} else if (!dml_info->is_primary_index_) {
// do nothing
} else if (OB_FAIL(generate_fk_lookup_part_id_expr(*dml_info))) {
LOG_WARN("failed to generate lookup part expr for foreign key", K(ret));
} else if (OB_FAIL(convert_update_new_fk_lookup_part_id_expr(all_exprs, *dml_info))) {
LOG_WARN("failed to convert lookup part expr for foreign key", K(ret));
}
}
} else if (get_insert_up()) {
for (int64_t i = 0; OB_SUCC(ret) && i < get_insert_up_index_dml_infos().count(); ++i) {
IndexDMLInfo *dml_info = get_insert_up_index_dml_infos().at(i);
if (OB_ISNULL(dml_info)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("dml info is null", K(ret), K(dml_info));
} else if (!dml_info->is_primary_index_) {
// do nothing
} else if (OB_FAIL(generate_fk_lookup_part_id_expr(*dml_info))) {
LOG_WARN("failed to generate lookup part expr for foreign key", K(ret));
} else if (OB_FAIL(convert_update_new_fk_lookup_part_id_expr(all_exprs, *dml_info))) {
LOG_WARN("failed to convert lookup part expr for foreign key", K(ret));
}
}
}
return ret;
}
int ObLogInsert::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 if (OB_FAIL(generate_insert_new_calc_partid_expr(*get_index_dml_infos().at(i)))) {
LOG_WARN("failed to generate new calc partid expr", K(ret));
} else { /*do nothing*/ }
}
if (OB_FAIL(ret)) {
/*do nothing*/
} else if (is_replace()) {
// delete in replace only old part id expr is required
for (int64_t i = 0; OB_SUCC(ret) && i < get_replace_index_dml_infos().count(); ++i) {
IndexDMLInfo *index_info = get_replace_index_dml_infos().at(i);
ObSqlSchemaGuard *schema_guard = NULL;
const ObTableSchema *table_schema = NULL;
bool is_heap_table = false;
ObArray<ObRawExpr *> column_exprs;
if (OB_ISNULL(get_plan()) ||
OB_ISNULL(schema_guard = get_plan()->get_optimizer_context().get_sql_schema_guard())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else if (OB_FAIL(schema_guard->get_table_schema(index_info->ref_table_id_, table_schema))) {
LOG_WARN("failed to get table schema", K(ret));
} else if (table_schema != NULL && FALSE_IT(is_heap_table = table_schema->is_heap_table())) {
// do nothing.
} else {
// When lookup_part_id_expr is a virtual generated column,
// the table with the primary key needs to be replaced,
// and the table without the primary key does not need to be replaced
ObRawExprCopier copier(get_plan()->get_optimizer_context().get_expr_factory());
if (OB_ISNULL(index_info)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("replace dml info is null", K(ret));
} else if (OB_FAIL(generate_old_calc_partid_expr(*index_info))) {
LOG_WARN("failed to generate calc partid expr", K(ret));
} else if (!is_heap_table && OB_FAIL(ObLogTableScan::replace_gen_column(get_plan(),
index_info->old_part_id_expr_,
index_info->lookup_part_id_expr_))){
LOG_WARN("failed to replace expr", K(ret));
} else if (is_heap_table) {
if (OB_FAIL(generate_lookup_part_id_expr(*index_info))) {
LOG_WARN("failed to generate lookup part id expr", K(ret));
} else if (OB_FAIL(ObRawExprUtils::extract_column_exprs(
index_info->lookup_part_id_expr_, column_exprs))) {
LOG_WARN("failed to extract column exprs", K(ret));
} else if (OB_FAIL(copier.add_skipped_expr(column_exprs))) {
LOG_WARN("failed to add skipped exprs", K(ret));
} else if (OB_FAIL(copier.copy(index_info->lookup_part_id_expr_,
index_info->lookup_part_id_expr_))) {
LOG_WARN("failed to copy lookup part id expr", K(ret));
}
}
}
}
} else if (get_insert_up()) {
// generate the calc_part_id_expr_ of update clause
for (int64_t i = 0; OB_SUCC(ret) && i < get_insert_up_index_dml_infos().count(); ++i) {
IndexDMLInfo *dml_info = get_insert_up_index_dml_infos().at(i);
ObSqlSchemaGuard *schema_guard = NULL;
const ObTableSchema *table_schema = NULL;
bool is_heap_table = false;
ObArray<ObRawExpr *> column_exprs;
if (OB_ISNULL(get_plan()) ||
OB_ISNULL(schema_guard = get_plan()->get_optimizer_context().get_sql_schema_guard())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else if (OB_FAIL(schema_guard->get_table_schema(dml_info->ref_table_id_, table_schema))) {
LOG_WARN("failed to get table schema", K(ret));
} else if (table_schema != NULL && FALSE_IT(is_heap_table = table_schema->is_heap_table())) {
// do nothing.
} else {
// When lookup_part_id_expr is a virtual generated column,
// the table with the primary key needs to be replaced,
// and the table without the primary key does not need to be replaced
ObRawExprCopier copier(get_plan()->get_optimizer_context().get_expr_factory());
// insert on duplicate update stmt
if (OB_ISNULL(dml_info)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("insert_up dml info is null", K(ret));
} else if (OB_FAIL(generate_old_calc_partid_expr(*dml_info))) {
LOG_WARN("fail to generate calc partid expr", K(ret));
} else if (OB_FAIL(generate_update_new_calc_partid_expr(*dml_info))) {
LOG_WARN("failed to generate update new part id expr", K(ret));
} else if (!is_heap_table && OB_FAIL(ObLogTableScan::replace_gen_column(get_plan(),
dml_info->old_part_id_expr_,
dml_info->lookup_part_id_expr_))){
LOG_WARN("failed to replace expr", K(ret));
} else if (is_heap_table) {
if (OB_FAIL(generate_lookup_part_id_expr(*dml_info))) {
LOG_WARN("failed to generate lookup part id expr", K(ret));
} else if (OB_FAIL(ObRawExprUtils::extract_column_exprs(
dml_info->lookup_part_id_expr_, column_exprs))) {
LOG_WARN("failed to extract column exprs", K(ret));
} else if (OB_FAIL(copier.add_skipped_expr(column_exprs))) {
LOG_WARN("failed to add skipped exprs", K(ret));
} else if (OB_FAIL(copier.copy(dml_info->lookup_part_id_expr_,
dml_info->lookup_part_id_expr_))) {
LOG_WARN("failed to copy lookup part id expr", K(ret));
}
}
}
}
}
return ret;
}
int ObLogInsert::inner_replace_op_exprs(ObRawExprReplacer &replacer)
{
int ret = OB_SUCCESS;
if (OB_FAIL(ObLogDelUpd::inner_replace_op_exprs(replacer))) {
LOG_WARN("failed to replace op exprs", K(ret));
} else if (is_replace() &&
OB_FAIL(replace_dml_info_exprs(replacer, get_replace_index_dml_infos()))) {
LOG_WARN("failed to replace dml info exprs", K(ret));
} else if (get_insert_up() &&
OB_FAIL(replace_dml_info_exprs(replacer, get_insert_up_index_dml_infos()))) {
LOG_WARN("failed to replace dml info exprs", K(ret));
} else if (NULL != constraint_infos_) {
for (int64_t i = 0; OB_SUCC(ret) && i < constraint_infos_->count(); ++i) {
const ObIArray<ObColumnRefRawExpr*> &constraint_columns =
constraint_infos_->at(i).constraint_columns_;
for (int64_t i = 0; OB_SUCC(ret) && i < constraint_columns.count(); ++i) {
ObColumnRefRawExpr *expr = constraint_columns.at(i);
if (OB_ISNULL(expr)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else if (expr->is_virtual_generated_column()) {
ObRawExpr *&dependant_expr = static_cast<ObColumnRefRawExpr *>(
expr)->get_dependant_expr();
if (OB_FAIL(replace_expr_action(replacer, dependant_expr))) {
LOG_WARN("failed to push back generate replace pair", K(ret));
}
}
}
}
}
return ret;
}