public Result execute(Session session) {
Result result;
if (targetTable != null && session.isReadOnly() && !targetTable.isTemp()) {
HsqlException e = Error.error(ErrorCode.X_25006);
return Result.newErrorResult(e);
}
if (isExplain) {
return getExplainResult(session);
}
try {
if (subqueries.length > 0) {
materializeSubQueries(session);
}
result = getResult(session);
} catch (Throwable t) {
result = Result.newErrorResult(t, null);
result.getException().setStatementType(group, type);
}
session.sessionContext.clearStructures(this);
return result;
}
boolean setWaitedSessionsTPL(Session session, Statement cs) {
session.tempSet.clear();
if (cs == null || session.abortTransaction) {
return true;
}
HsqlName[] nameList = cs.getTableNamesForWrite();
for (int i = 0; i < nameList.length; i++) {
HsqlName name = nameList[i];
if (name.schema == SqlInvariants.SYSTEM_SCHEMA_HSQLNAME) {
continue;
}
Session holder = (Session) tableWriteLocks.get(name);
if (holder != null && holder != session) {
session.tempSet.add(holder);
}
Iterator it = tableReadLocks.get(name);
while (it.hasNext()) {
holder = (Session) it.next();
if (holder != session) {
session.tempSet.add(holder);
}
}
}
nameList = cs.getTableNamesForRead();
if (session.isReadOnly()) {
nameList = catalogNameList;
}
for (int i = 0; i < nameList.length; i++) {
HsqlName name = nameList[i];
if (name.schema == SqlInvariants.SYSTEM_SCHEMA_HSQLNAME) {
continue;
}
Session holder = (Session) tableWriteLocks.get(name);
if (holder != null && holder != session) {
session.tempSet.add(holder);
}
}
for (int i = 0; i < session.waitingSessions.size(); i++) {
Session current = (Session) session.waitingSessions.get(i);
if (session.tempSet.contains(current)) {
session.tempSet.clear();
return false;
}
}
return true;
}