private void InitForFirstGroupByValue(SelectCommandContext selectCommandContext, IStreamDataReader streamDataReader,
GroupByValue groupByValue, IDictionary <GroupByValue, MemoryQueryResultRow> dataMap,
IDictionary <GroupByValue, IDictionary <AggregationProjection, IAggregationUnit> > aggregationMap)
{
if (!dataMap.ContainsKey(groupByValue))
{
dataMap.Add(groupByValue, new MemoryQueryResultRow(streamDataReader));
}
if (!aggregationMap.ContainsKey(groupByValue))
{
var map = selectCommandContext.GetProjectionsContext().GetAggregationProjections().ToDictionary(o => o,
o => AggregationUnitFactory.Create(o.GetAggregationType(), o is AggregationDistinctProjection));
aggregationMap.Add(groupByValue, map);
}
}
private bool AggregateCurrentGroupByRowAndNext()
{
bool result = false;
IDictionary <AggregationProjection, IAggregationUnit> aggregationUnitMap =
_selectCommandContext.GetProjectionsContext().GetAggregationProjections().ToDictionary(o => o,
o => AggregationUnitFactory.Create(o.GetAggregationType(), o is AggregationDistinctProjection));
while (_currentGroupByValues.SequenceEqual(new GroupByValue(GetCurrentStreamDataReader(), _selectCommandContext.GetGroupByContext().GetItems()).GetGroupValues()))
{
Aggregate(aggregationUnitMap);
CacheCurrentRow();
result = base.Read();
if (!result)
{
break;
}
}
SetAggregationValueToCurrentRow(aggregationUnitMap);
return(result);
}