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disable nlj group rescan for some cases

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This commit is contained in:
shibin-xu
2023-05-24 06:17:29 +00:00
committed by ob-robot
parent 5373a45d6d
commit 2724fef69d
2 changed files with 57 additions and 10 deletions
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66
src/sql/optimizer/ob_log_join.cpp
View File

@ -1250,16 +1250,8 @@ int ObLogJoin::check_and_set_use_batch()
LOG_WARN("failed to check contains limit", K(ret));
} else if (contains_limit) {
can_use_batch_nlj_ = false;
} else if (get_child(1)->is_table_scan()) {
ObLogTableScan *ts = NULL;
if (OB_ISNULL(ts = static_cast<ObLogTableScan *>(get_child(1)))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid input", K(ret));
} else if (ts->has_index_scan_filter() && ts->get_index_back() && ts->get_is_index_global()) {
// For the global index lookup, if there is a pushdown filter when scanning the index,
// batch cannot be used.
can_use_batch_nlj_ = false;
}
} else if (OB_FAIL(check_if_disable_batch(get_child(1)))) {
LOG_WARN("failed to check if disable batch", K(ret));
}
}
// set use batch
@ -1271,6 +1263,60 @@ int ObLogJoin::check_and_set_use_batch()
return ret;
}
int ObLogJoin::check_if_disable_batch(ObLogicalOperator* root)
{
int ret = OB_SUCCESS;
if (OB_ISNULL(root)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected null", K(ret));
} else if (!can_use_batch_nlj_) {
// do nothing
} else if (root->is_table_scan()) {
ObLogTableScan *ts = NULL;
ObLogPlan *plan = NULL;
ObTablePartitionInfo *info = NULL;
if (OB_ISNULL(ts = static_cast<ObLogTableScan *>(root)) ||
OB_ISNULL(plan = get_plan()) ||
OB_ISNULL(info = ts->get_table_partition_info())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid input", K(ret));
} else if (ts->has_index_scan_filter() && ts->get_index_back() && ts->get_is_index_global()) {
// For the global index lookup, if there is a pushdown filter when scanning the index,
// batch cannot be used.
can_use_batch_nlj_ = false;
} else {
SMART_VAR(ObTablePartitionInfo, tmp_info) {
ObTablePartitionInfo *tmp_info_ptr = &tmp_info;
if (OB_FAIL(plan->gen_das_table_location_info(ts, tmp_info_ptr))) {
LOG_WARN("failed to gen das table location info", K(ret));
} else {
if (tmp_info.get_table_location().use_das() &&
tmp_info.get_table_location().get_has_dynamic_exec_param()) {
// dynamic partition pruning, no need to check
} else if (10 < info->get_phy_tbl_location_info().get_phy_part_loc_info_list().count()) {
can_use_batch_nlj_ = false;
}
}
}
}
} else if (log_op_def::LOG_SUBPLAN_SCAN == root->get_type()) {
if (OB_FAIL(SMART_CALL(check_if_disable_batch(root->get_child(0))))) {
LOG_WARN("failed to check if disable batch", K(ret));
}
} else if (log_op_def::LOG_SET == root->get_type()) {
for (int64_t i = 0; OB_SUCC(ret) && can_use_batch_nlj_ && i < root->get_num_of_child(); ++i) {
ObLogicalOperator *child = root->get_child(i);
if (OB_ISNULL(child)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid child", K(ret));
} else if (OB_FAIL(SMART_CALL(check_if_disable_batch(child)))) {
LOG_WARN("failed to check if disable batch", K(ret));
}
}
} else { /* do nothing */ }
return ret;
}
bool ObLogJoin::is_my_exec_expr(const ObRawExpr *expr)
{
return ObOptimizerUtil::find_item(nl_params_, expr);

1
src/sql/optimizer/ob_log_join.h
View File

@ -154,6 +154,7 @@ namespace sql
inline bool can_use_batch_nlj() const { return can_use_batch_nlj_; }
void set_can_use_batch_nlj(bool can_use) { can_use_batch_nlj_ = can_use; }
int check_and_set_use_batch();
int check_if_disable_batch(ObLogicalOperator* root);
void set_join_path(JoinPath *path) { join_path_ = path; }
JoinPath *get_join_path() { return join_path_; }
bool is_my_exec_expr(const ObRawExpr *expr);