@Override
public boolean next() {
synchronized (sync) {
if (SysProperties.CHECK && end) {
DbException.throwInternalError();
}
while (true) {
if (needNewDelta) {
loadNext(false);
needNewDelta = false;
}
if (needNewBase) {
loadNext(true);
needNewBase = false;
}
if (deltaRow == null) {
if (baseRow == null) {
end = true;
return false;
}
onBase = true;
needNewBase = true;
return true;
}
int sessionId = deltaRow.getSessionId();
boolean isThisSession = sessionId == session.getId();
boolean isDeleted = deltaRow.isDeleted();
if (isThisSession && isDeleted) {
needNewDelta = true;
continue;
}
if (baseRow == null) {
if (isDeleted) {
if (isThisSession) {
end = true;
return false;
}
// the row was deleted by another session: return it
onBase = false;
needNewDelta = true;
return true;
}
DbException.throwInternalError();
}
int compare = index.compareRows(deltaRow, baseRow);
if (compare == 0) {
// can't use compareKeys because the
// version would be compared as well
long k1 = deltaRow.getKey();
long k2 = baseRow.getKey();
compare = MathUtils.compareLong(k1, k2);
}
if (compare == 0) {
if (isDeleted) {
if (isThisSession) {
DbException.throwInternalError();
}
// another session updated the row
} else {
if (isThisSession) {
onBase = false;
needNewBase = true;
needNewDelta = true;
return true;
}
// another session inserted the row: ignore
needNewBase = true;
needNewDelta = true;
continue;
}
}
if (compare > 0) {
onBase = true;
needNewBase = true;
return true;
}
onBase = false;
needNewDelta = true;
return true;
}
}
}
protected int compareSecure(Value o, CompareMode mode) {
return MathUtils.compareLong(nanos, ((ValueTime) o).nanos);
}
public boolean next() {
synchronized (this.sync) {
if ((SysProperties.CHECK) && (this.end)) {
DbException.throwInternalError();
}
int compare;
for (; ; ) {
if (this.needNewDelta) {
loadNext(false);
this.needNewDelta = false;
}
if (this.needNewBase) {
loadNext(true);
this.needNewBase = false;
}
if (this.deltaRow == null) {
if (this.baseRow == null) {
this.end = true;
return false;
}
this.onBase = true;
this.needNewBase = true;
return true;
}
int sessionId = this.deltaRow.getSessionId();
boolean isThisSession = sessionId == this.session.getId();
boolean isDeleted = this.deltaRow.isDeleted();
if ((isThisSession) && (isDeleted)) {
this.needNewDelta = true;
} else {
if (this.baseRow == null) {
if (isDeleted) {
if (isThisSession) {
this.end = true;
return false;
}
this.onBase = false;
this.needNewDelta = true;
return true;
}
DbException.throwInternalError();
}
compare = this.index.compareRows(this.deltaRow, this.baseRow);
if (compare == 0) {
long k1 = this.deltaRow.getKey();
long k2 = this.baseRow.getKey();
compare = MathUtils.compareLong(k1, k2);
}
if (compare != 0) {
break;
}
if (isDeleted) {
if (!isThisSession) {
break;
}
DbException.throwInternalError();
break;
}
if (isThisSession) {
this.onBase = false;
this.needNewBase = true;
this.needNewDelta = true;
return true;
}
this.needNewBase = true;
this.needNewDelta = true;
}
}
if (compare > 0) {
this.onBase = true;
this.needNewBase = true;
return true;
}
this.onBase = false;
this.needNewDelta = true;
return true;
}
}