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优化并行执行的条件判断 #75

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merged 6 commits into from
May 25, 2021
Merged

优化并行执行的条件判断 #75

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a8baf58
Merge pull request #1 from kunpengcompute/olap-kp-dev
yibantianxia May 12, 2021
37acfe3
add parallel query code
yibantianxia May 12, 2021
2e2f815
add parallel query code
yibantianxia May 12, 2021
3884892
add parallel query code
yibantianxia May 12, 2021
e1b2495
Merge pull request #2 from kunpengcompute/olap-kp-dev
yibantianxia May 13, 2021
62d3f6a
add parallel query code
yibantianxia May 22, 2021
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48 changes: 30 additions & 18 deletions sql/pq_condition.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -750,6 +750,28 @@ bool suite_for_parallel_query(SELECT_LEX_UNIT *unit) {
return true;
}

bool suite_for_parallel_query(TABLE_LIST *tbl_list) {
if (tbl_list->is_view()) {
return false;
}

// skip explicit table lock
if (tbl_list->lock_descriptor().type > TL_READ ||
current_thd->locking_clause) {
return false;
}

TABLE *tb = tbl_list->table;
if (tb != nullptr &&
(tb->s->tmp_table != NO_TMP_TABLE || // template table
tb->file->ht->db_type != DB_TYPE_INNODB || // Non-InnoDB table
tb->part_info || // partition table
tb->fulltext_searched)) { // fulltext match search
return false;
}
return true;
}

bool suite_for_parallel_query(SELECT_LEX *select) {
if (select->first_inner_unit() != nullptr || // nesting subquery, including view〝derived table〝subquery condition and so on.
select->outer_select() != nullptr || // nested subquery
Expand All @@ -761,27 +783,17 @@ bool suite_for_parallel_query(SELECT_LEX *select) {

for (TABLE_LIST *tbl_list = select->table_list.first; tbl_list != nullptr;
tbl_list = tbl_list->next_local) {
// skip view
if (tbl_list->is_view()) {
return false;
if (!suite_for_parallel_query(tbl_list)) {
return false;
}

// skip explicit table lock
if (tbl_list->lock_descriptor().type > TL_READ ||
current_thd->locking_clause) {
return false;
}

for (TABLE_LIST *tbl_list = select->leaf_tables; tbl_list != nullptr;
tbl_list = tbl_list->next_leaf) {
if (!suite_for_parallel_query(tbl_list)) {
return false;
}

TABLE *tb = tbl_list->table;
if (tb != nullptr &&
(tb->s->tmp_table != NO_TMP_TABLE || // template table
tb->file->ht->db_type != DB_TYPE_INNODB || // Non-InnoDB table
tb->part_info || // partition table
tb->fulltext_searched)) { // fulltext match search
return false;
}
}

return true;
}

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