ZYM/BH-TicketSystem
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fixed many bugs, ready to fix more

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This commit is contained in:
happyZYM
2024-04-29 13:45:47 +00:00
parent bf76de6590
commit 49448bb71d
2 changed files with 129 additions and 14 deletions
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60
bpt/include/bpt/bpt.hpp
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@ -317,7 +317,6 @@ class BPlusTreeIndexer {
if (pos.path.back().second == page_guard.template As<PageType>()->data.key_count) {
// The "entry" to remove is just a past-the-end pointer
page_guard.template AsMut<PageType>()->data.key_count--;
return;
} else {
// The "entry" to remove is a key-val pair
memmove(
@ -325,13 +324,23 @@ class BPlusTreeIndexer {
page_guard.template As<PageType>()->data.p_data + pos.path.back().second + 1,
(page_guard.template As<PageType>()->data.key_count - pos.path.back().second - 1) * sizeof(key_index_pair_t));
page_guard.template AsMut<PageType>()->data.key_count--;
return;
if (page_guard.template AsMut<PageType>()->data.key_count + 1 < _ActualDataType::kMaxKeyCount) {
page_guard.template AsMut<PageType>()->data.p_data[page_guard.template As<PageType>()->data.key_count].second =
page_guard.template As<PageType>()
->data.p_data[page_guard.template As<PageType>()->data.key_count + 1]
.second;
} else {
page_guard.template AsMut<PageType>()->data.p_data[page_guard.template As<PageType>()->data.key_count].second =
page_guard.template As<PageType>()->data.p_n;
}
}
if (has_enough_keys) {
if (page_guard.template As<PageType>()->data.page_status & PageStatusType::ROOT &&
page_guard.template As<PageType>()->data.key_count) {
page_guard.template As<PageType>()->data.key_count == 0) {
// special case for the root page
root_page_id = page_guard.template As<PageType>()->data.p_data[0].second;
BasicPageGuard root_page_guard = bpm->FetchPageBasic(root_page_id);
root_page_guard.template AsMut<PageType>()->data.page_status |= PageStatusType::ROOT;
page_id_t page_to_delete = page_guard.PageId();
pos.path.clear(); // all page_guards are invalid now
bpm->DeletePage(page_to_delete);
@ -372,10 +381,25 @@ class BPlusTreeIndexer {
page_guard.template As<PageType>()->data.p_data,
page_guard.template As<PageType>()->data.key_count * sizeof(key_index_pair_t));
prev_page_guard.template AsMut<PageType>()->data.key_count += page_guard.template As<PageType>()->data.key_count;
prev_page_guard.template AsMut<PageType>()
->data.p_data[prev_page_guard.template As<PageType>()->data.key_count]
.second =
page_guard.template As<PageType>()->data.p_data[page_guard.template As<PageType>()->data.key_count].second;
if (page_guard.template As<PageType>()->data.key_count < _ActualDataType::kMaxKeyCount) {
if (prev_page_guard.template As<PageType>()->data.key_count < _ActualDataType::kMaxKeyCount) {
prev_page_guard.template AsMut<PageType>()
->data.p_data[prev_page_guard.template As<PageType>()->data.key_count]
.second =
page_guard.template As<PageType>()->data.p_data[page_guard.template As<PageType>()->data.key_count].second;
} else {
prev_page_guard.template AsMut<PageType>()->data.p_n =
page_guard.template As<PageType>()->data.p_data[page_guard.template As<PageType>()->data.key_count].second;
}
} else {
if (prev_page_guard.template As<PageType>()->data.key_count < _ActualDataType::kMaxKeyCount) {
prev_page_guard.template AsMut<PageType>()
->data.p_data[prev_page_guard.template As<PageType>()->data.key_count]
.second = page_guard.template As<PageType>()->data.p_n;
} else {
prev_page_guard.template AsMut<PageType>()->data.p_n = page_guard.template As<PageType>()->data.p_n;
}
}
parent_page_guard.template AsMut<PageType>()->data.p_data[pos.path[pos.path.size() - 2].second - 1].first =
prev_page_guard.template As<PageType>()
->data.p_data[prev_page_guard.template As<PageType>()->data.key_count - 1]
@ -405,9 +429,11 @@ class BPlusTreeIndexer {
page_guard.template AsMut<PageType>()->data.key_count--;
if (has_enough_keys) {
if (page_guard.template As<PageType>()->data.page_status & PageStatusType::ROOT &&
page_guard.template As<PageType>()->data.key_count) {
page_guard.template As<PageType>()->data.key_count == 0) {
// special case for the root page
root_page_id = page_guard.template As<PageType>()->data.p_data[0].second;
BasicPageGuard root_page_guard = bpm->FetchPageBasic(root_page_id);
root_page_guard.template AsMut<PageType>()->data.page_status |= PageStatusType::ROOT;
page_id_t page_to_delete = page_guard.PageId();
pos.path.clear(); // all page_guards are invalid now
bpm->DeletePage(page_to_delete);
@ -510,8 +536,8 @@ class BPlusTreeIndexer {
.first;
page_id_t current_page_id = page_guard.PageId();
pos.path.pop_back(); // page_guard is no longer valid
bpm->DeletePage(current_page_id);
if (!is_in_right_skew_path) {
bpm->DeletePage(current_page_id);
// we need to update the parent page
RemoveEntryAt(pos, true);
return;
@ -526,12 +552,18 @@ class BPlusTreeIndexer {
if (is_fixing_up_recursive &&
pos.path[pos.path.size() - 2].second + 1 == parent_page_guard.template As<PageType>()->data.key_count) {
// the next page has past-the-end pointer
if (next_page_guard.template As<PageType>()->data.key_count == _ActualDataType::kMaxKeyCount) {
size_t intended_dest = next_page_guard.template As<PageType>()->data.key_count +
page_guard.template As<PageType>()->data.key_count;
if (intended_dest == _ActualDataType::kMaxKeyCount) {
next_page_guard.template AsMut<PageType>()->data.p_n =
next_page_guard.template As<PageType>()->data.p_data[_ActualDataType::kMaxKeyCount - 1].second;
next_page_guard.template As<PageType>()
->data.p_data[next_page_guard.template As<PageType>()->data.key_count]
.second;
} else {
next_page_guard.template AsMut<PageType>()->data.p_data[_ActualDataType::kMaxKeyCount].second =
next_page_guard.template As<PageType>()->data.p_data[_ActualDataType::kMaxKeyCount - 1].second;
next_page_guard.template AsMut<PageType>()->data.p_data[intended_dest].second =
next_page_guard.template As<PageType>()
->data.p_data[next_page_guard.template As<PageType>()->data.key_count]
.second;
}
}
memmove(
@ -543,8 +575,8 @@ class BPlusTreeIndexer {
next_page_guard.template AsMut<PageType>()->data.key_count += page_guard.template As<PageType>()->data.key_count;
page_id_t current_page_id = page_guard.PageId();
pos.path.pop_back(); // page_guard is no longer valid
bpm->DeletePage(current_page_id);
if (!is_in_right_skew_path) {
bpm->DeletePage(current_page_id);
// we need to update the parent page
RemoveEntryAt(pos, true);
return;