return r;
}
private Result buildResult(Session session, int limitcount) {
RowSetNavigatorData navigator = new RowSetNavigatorData(session,
(QuerySpecification) this);
Result result = Result.newResult(navigator);
result.metaData = resultMetaData;
result.setDataResultConcurrency(isUpdatable);
// A VoltDB extension to support LIMIT 0
// Test for early return case added by VoltDB to support LIMIT 0 in "HSQL backend".
if (limitcount == 0) {
return result;
}
// End of VoltDB extension
int fullJoinIndex = 0;
RangeIterator[] rangeIterators =
new RangeIterator[rangeVariables.length];
for (int i = 0; i < rangeVariables.length; i++) {
rangeIterators[i] = rangeVariables[i].getIterator(session);
}
for (int currentIndex = 0; ; ) {
if (currentIndex < fullJoinIndex) {
boolean end = true;
for (int i = fullJoinIndex + 1; i < rangeVariables.length;
i++) {
if (rangeVariables[i].isRightJoin) {
rangeIterators[i] = rangeVariables[i].getFullIterator(
session, (RangeIteratorMain) rangeIterators[i]);
fullJoinIndex = i;
currentIndex = i;
end = false;
break;
}
}
if (end) {
break;
}
}
RangeIterator it = rangeIterators[currentIndex];
if (it.next()) {
if (currentIndex < rangeVariables.length - 1) {
currentIndex++;
continue;
}
} else {
it.reset();
currentIndex--;
continue;
}
session.sessionData.startRowProcessing();
Object[] data = new Object[indexLimitData];
for (int i = 0; i < indexStartAggregates; i++) {
if (isAggregated && aggregateCheck[i]) {
continue;
} else {
data[i] = exprColumns[i].getValue(session);
}
}
for (int i = indexLimitVisible; i < indexLimitRowId; i++) {
data[i] = it.getRowidObject();
}
Object[] groupData = null;
if (isAggregated || isGrouped) {
groupData = navigator.getGroupData(data);
if (groupData != null) {
data = groupData;
}
}
for (int i = indexStartAggregates; i < indexLimitExpressions;
i++) {
data[i] =
((ExpressionAggregate) exprColumns[i])
.updateAggregatingValue(session, data[i]);
}
if (groupData == null) {
navigator.add(data);
}
if (isAggregated || isGrouped) {
continue;
}
if (navigator.getSize() >= limitcount) {
break;
}
}
navigator.reset();
if (!isGrouped && !isAggregated) {
return result;
}
if (isAggregated) {
if (!isGrouped && navigator.getSize() == 0) {
Object[] data = new Object[exprColumns.length];
navigator.add(data);
}
RangeIteratorBase it = new RangeIteratorBase(session,
navigator.store, navigator.table, resultRangePosition);
session.sessionContext.setRangeIterator(it);
while (it.next()) {
for (int i = indexStartAggregates; i < indexLimitExpressions;
i++) {
ExpressionAggregate aggregate =
(ExpressionAggregate) exprColumns[i];
it.currentData[i] = aggregate.getAggregatedValue(session,
it.currentData[i]);
}
for (int i = 0; i < indexStartAggregates; i++) {
if (aggregateCheck[i]) {
it.currentData[i] = exprColumns[i].getValue(session);
}
}
}
}
navigator.reset();
if (havingCondition != null) {
while (navigator.hasNext()) {
Object[] data = (Object[]) navigator.getNext();
if (!Boolean.TRUE.equals(
data[indexLimitVisible + groupByColumnCount])) {
navigator.remove();
}
}
navigator.reset();
}
return result;
}