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[SCN REFACTOR] replace flash back snapshot and remove read snapshot session

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This commit is contained in:
wangt1xiuyi
2022-11-28 01:54:50 +00:00
committed by ob-robot
parent c4c13f6296
commit 11485d6a98
268 changed files with 6763 additions and 7737 deletions
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21
src/sql/optimizer/ob_log_set.cpp
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@ -827,7 +827,8 @@ int ObLogSet::get_used_pq_set_hint(const ObPQSetHint *&used_hint)
const ObIArray<ObItemType> &dist_methods = used_hint->get_dist_methods();
if (OB_FAIL(construct_pq_set_hint(hint))) {
LOG_WARN("fail to construct pq set hint", K(ret));
} else if (dist_methods.count() != hint.get_dist_methods().count()) {
} else if (dist_methods.count() != hint.get_dist_methods().count()
|| 0 != hint.get_left_branch().case_compare(used_hint->get_left_branch())) {
used_hint = NULL;
} else {
for (int64_t i = 0; NULL != used_hint && i < dist_methods.count(); ++i) {
@ -862,7 +863,7 @@ int ObLogSet::print_outline_data(planText &plan_text)
LOG_WARN("fail to print buffer", K(ret), K(buf), K(buf_len), K(pos));
} else if (OB_FAIL(construct_pq_set_hint(hint))) {
LOG_WARN("fail to construct pq set hint", K(ret));
} else if (hint.get_dist_methods().empty()) {
} else if (hint.get_dist_methods().empty() && hint.get_left_branch().empty()) {
/*do nothing*/
} else if (OB_FALSE_IT(hint.set_qb_name(qb_name))) {
} else if (hint.print_hint(plan_text)) {
@ -874,6 +875,22 @@ int ObLogSet::print_outline_data(planText &plan_text)
int ObLogSet::construct_pq_set_hint(ObPQSetHint &hint)
{
int ret = OB_SUCCESS;
const ObSelectStmt *stmt = static_cast<const ObSelectStmt *>(get_stmt());
const ObSelectStmt *left_stmt = get_left_stmt();
ObString left_branch;
if (OB_ISNULL(stmt) || OB_ISNULL(left_stmt)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected NULL", K(ret), K(stmt), K(left_stmt));
} else if (!stmt->is_set_distinct()
|| 2 < stmt->get_set_query().count()
|| stmt->get_set_query(0) == left_stmt) {
/* do nothing */
} else if (OB_FAIL(left_stmt->get_qb_name(left_branch))) {
LOG_WARN("unexpected NULL", K(ret), K(stmt));
} else {
hint.set_left_branch(left_branch);
}
if (DistAlgo::DIST_BASIC_METHOD != set_dist_algo_) {
int64_t random_none_idx = OB_INVALID_INDEX;
if (DistAlgo::DIST_SET_RANDOM == set_dist_algo_) {