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fix "Unexpected old row update or delete a non exist index row"

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This commit is contained in:
zx0
2021-09-24 13:31:03 +08:00
committed by wangzelin.wzl
parent 0a794fcaad
commit feb6c0e7c8
2 changed files with 30 additions and 26 deletions
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52
src/storage/memtable/mvcc/ob_mvcc_iterator.cpp
View File

@ -43,6 +43,7 @@ int ObMvccValueIterator::init(const ObIMvccCtx& ctx, const ObTransSnapInfo& snap
{
int ret = OB_SUCCESS;
skip_compact_ = skip_compact;
bool can_read_by_sql_no = false;
reset();
int64_t lock_for_read_start = ObClockGenerator::getClock();
// snapshot version equal INT64_MAX is unexpected
@ -62,28 +63,32 @@ int ObMvccValueIterator::init(const ObIMvccCtx& ctx, const ObTransSnapInfo& snap
value_ = value;
is_inited_ = true;
version_iter_ = value->get_list_head();
} else if (read_by_sql_no(ctx, snapshot_info, const_cast<ObMvccRow*>(value), query_flag)) {
ctx_ = &ctx;
value_ = value;
is_inited_ = true;
} else if (OB_FAIL(read_by_sql_no(ctx, snapshot_info, const_cast<ObMvccRow*>(value), query_flag, can_read_by_sql_no))) {
//do nothing
} else {
// read by snapshot
ctx_ = &ctx;
value_ = value;
// not need lock_for_read when row is not locked
if (value->row_lock_.is_locked() && OB_FAIL(value->lock_for_read(key, const_cast<ObIMvccCtx&>(ctx)))) {
TRANS_LOG(WARN, "wait row lock fail", K(ret), K(ctx), KP(value), K(*value));
} else if (OB_FAIL(find_start_pos(snapshot_info.get_snapshot_version()))) {
TRANS_LOG(WARN, "fail to find start pos for iterator", K(ret));
} else {
if (GCONF.enable_sql_audit) {
mark_trans_node(snapshot_info.get_snapshot_version(), query_flag.is_prewarm());
}
// set has_read_relocated_row flag true when reading relocated row
if (value->is_has_relocated()) {
const_cast<ObIMvccCtx*>(&ctx)->set_has_read_relocated_row();
}
if (can_read_by_sql_no) {
ctx_ = &ctx;
value_ = value;
is_inited_ = true;
} else {
// read by snapshot
ctx_ = &ctx;
value_ = value;
// not need lock_for_read when row is not locked
if (value->row_lock_.is_locked() && OB_FAIL(value->lock_for_read(key, const_cast<ObIMvccCtx&>(ctx)))) {
TRANS_LOG(WARN, "wait row lock fail", K(ret), K(ctx), KP(value), K(*value));
} else if (OB_FAIL(find_start_pos(snapshot_info.get_snapshot_version()))) {
TRANS_LOG(WARN, "fail to find start pos for iterator", K(ret));
} else {
if (GCONF.enable_sql_audit) {
mark_trans_node(snapshot_info.get_snapshot_version(), query_flag.is_prewarm());
}
// set has_read_relocated_row flag true when reading relocated row
if (value->is_has_relocated()) {
const_cast<ObIMvccCtx*>(&ctx)->set_has_read_relocated_row();
}
is_inited_ = true;
}
}
}
// stat lock for read time
@ -273,11 +278,10 @@ void ObMvccValueIterator::move_to_next_node()
}
// check if read self transaction when fetch cursor
bool ObMvccValueIterator::read_by_sql_no(
const ObIMvccCtx& ctx, const ObTransSnapInfo& snapshot_info, ObMvccRow* value, const ObQueryFlag& query_flag)
int ObMvccValueIterator::read_by_sql_no(
const ObIMvccCtx& ctx, const ObTransSnapInfo& snapshot_info, ObMvccRow* value, const ObQueryFlag& query_flag, bool& can_read_by_sql_no)
{
int ret = OB_SUCCESS;
bool can_read_by_sql_no = false;
bool is_locked = false;
ObMvccTransNode* iter = value->get_list_head();
@ -343,7 +347,7 @@ bool ObMvccValueIterator::read_by_sql_no(
if (is_locked) {
value->latch_.unlock();
}
return can_read_by_sql_no;
return ret;
}
void ObMvccValueIterator::reset()

4
src/storage/memtable/mvcc/ob_mvcc_iterator.h
View File

@ -115,8 +115,8 @@ public:
{
return version_iter_;
}
bool read_by_sql_no(const ObIMvccCtx& ctx, const transaction::ObTransSnapInfo& snapshot_info, ObMvccRow* value,
const ObQueryFlag& query_flag);
int read_by_sql_no(const ObIMvccCtx& ctx, const transaction::ObTransSnapInfo& snapshot_info, ObMvccRow* value,
const ObQueryFlag& query_flag, bool& can_read_by_sql_no);
private:
int find_start_pos(const int64_t read_snapshot);