public void close() {
if (!closed) {
try {
database.checkPowerOff();
cleanTempTables(true);
undoLog.clear();
database.removeSession(this);
} finally {
closed = true;
}
}
}
/**
* Commit the current transaction. If the statement was not a data definition statement, and if
* there are temporary tables that should be dropped or truncated at commit, this is done as well.
*
* @param ddl if the statement was a data definition statement
*/
public void commit(boolean ddl) {
checkCommitRollback();
currentTransactionName = null;
transactionStart = 0;
if (containsUncommitted()) {
// need to commit even if rollback is not possible
// (create/drop table and so on)
database.commit(this);
}
if (undoLog.size() > 0) {
// commit the rows when using MVCC
if (database.isMultiVersion()) {
ArrayList<Row> rows = New.arrayList();
synchronized (database) {
while (undoLog.size() > 0) {
UndoLogRecord entry = undoLog.getLast();
entry.commit();
rows.add(entry.getRow());
undoLog.removeLast(false);
}
for (int i = 0, size = rows.size(); i < size; i++) {
Row r = rows.get(i);
r.commit();
}
}
}
undoLog.clear();
}
if (!ddl) {
// do not clean the temp tables if the last command was a
// create/drop
cleanTempTables(false);
if (autoCommitAtTransactionEnd) {
autoCommit = true;
autoCommitAtTransactionEnd = false;
}
}
if (unlinkLobMap != null && unlinkLobMap.size() > 0) {
// need to flush the transaction log, because we can't unlink lobs if the
// commit record is not written
database.flush();
for (Value v : unlinkLobMap.values()) {
v.unlink();
v.close();
}
unlinkLobMap = null;
}
unlockAll();
}
/** Fully roll back the current transaction. */
public void rollback() {
checkCommitRollback();
currentTransactionName = null;
boolean needCommit = false;
if (undoLog.size() > 0) {
rollbackTo(0, false);
needCommit = true;
}
if (locks.size() > 0 || needCommit) {
database.commit(this);
}
cleanTempTables(false);
unlockAll();
if (autoCommitAtTransactionEnd) {
autoCommit = true;
autoCommitAtTransactionEnd = false;
}
}