&& rightNavigator.getSize() < session.resultMaxMemoryRows);
if (memory) {
rowSet = new RowSetNavigatorData(session, this);
} else {
rowSet = new RowSetNavigatorDataTable(session, this);
}
rowSet.copy(navigator, leftQueryExpression.unionColumnMap);
navigator.release();
navigator = rowSet;
first.setNavigator(navigator);
first.metaData = this.getMetaData();
if (memory) {
rowSet = new RowSetNavigatorData(session, this);
} else {
rowSet = new RowSetNavigatorDataTable(session, this);
}
rowSet.copy(rightNavigator, rightQueryExpression.unionColumnMap);
rightNavigator.release();