ClickHouse/src/Interpreters/MergeTreeTransaction.cpp

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#include <Interpreters/MergeTreeTransaction.h>
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#include <Storages/MergeTree/IMergeTreeDataPart.h>
#include <Storages/MergeTree/MergeTreeData.h>
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#include <Interpreters/TransactionLog.h>
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namespace DB
{
MergeTreeTransaction::MergeTreeTransaction(Snapshot snapshot_, LocalTID local_tid_, UUID host_id)
: tid({snapshot_, local_tid_, host_id})
, snapshot(snapshot_)
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, csn(Tx::UnknownCSN)
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{
}
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MergeTreeTransaction::State MergeTreeTransaction::getState() const
{
if (csn == Tx::UnknownCSN)
return RUNNING;
if (csn == Tx::RolledBackCSN)
return ROLLED_BACK;
return COMMITTED;
}
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void MergeTreeTransaction::addNewPart(const DataPartPtr & new_part, MergeTreeTransaction * txn)
{
TransactionID tid = txn ? txn->tid : Tx::PrehistoricTID;
new_part->versions.setMinTID(tid);
if (txn)
txn->addNewPart(new_part);
}
void MergeTreeTransaction::removeOldPart(const DataPartPtr & part_to_remove, MergeTreeTransaction * txn)
{
TransactionID tid = txn ? txn->tid : Tx::PrehistoricTID;
String error_context = fmt::format("Table: {}, part name: {}",
part_to_remove->storage.getStorageID().getNameForLogs(),
part_to_remove->name);
part_to_remove->versions.lockMaxTID(tid, error_context);
if (txn)
txn->removeOldPart(part_to_remove);
}
void MergeTreeTransaction::addNewPartAndRemoveCovered(const DataPartPtr & new_part, const DataPartsVector & covered_parts, MergeTreeTransaction * txn)
{
TransactionID tid = txn ? txn->tid : Tx::PrehistoricTID;
new_part->versions.setMinTID(tid);
if (txn)
txn->addNewPart(new_part);
String error_context = fmt::format("Table: {}, covering part name: {}",
new_part->storage.getStorageID().getNameForLogs(),
new_part->name);
error_context += ", part_name: {}";
for (auto covered : covered_parts)
{
covered->versions.lockMaxTID(tid, fmt::format(error_context, covered->name));
if (txn)
txn->removeOldPart(covered);
}
}
void MergeTreeTransaction::addNewPart(const DataPartPtr & new_part)
{
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assert(csn == Tx::UnknownCSN);
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creating_parts.push_back(new_part);
}
void MergeTreeTransaction::removeOldPart(const DataPartPtr & part_to_remove)
{
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assert(csn == Tx::UnknownCSN);
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removing_parts.push_back(part_to_remove);
}
bool MergeTreeTransaction::isReadOnly() const
{
return creating_parts.empty() && removing_parts.empty();
}
void MergeTreeTransaction::beforeCommit()
{
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assert(csn == Tx::UnknownCSN);
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}
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void MergeTreeTransaction::afterCommit(CSN assigned_csn) noexcept
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{
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assert(csn == Tx::UnknownCSN);
csn = assigned_csn;
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for (const auto & part : creating_parts)
part->versions.mincsn.store(csn);
for (const auto & part : removing_parts)
part->versions.maxcsn.store(csn);
}
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void MergeTreeTransaction::rollback() noexcept
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{
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assert(csn == Tx::UnknownCSN);
csn = Tx::RolledBackCSN;
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for (const auto & part : creating_parts)
part->versions.mincsn.store(Tx::RolledBackCSN);
for (const auto & part : removing_parts)
part->versions.unlockMaxTID(tid);
}
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void MergeTreeTransaction::onException()
{
if (csn)
return;
TransactionLog::instance().rollbackTransaction(shared_from_this());
}
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}