public int Compare(MemoryQueryResultRow x, MemoryQueryResultRow y)
{
if (!selectCommandContext.GetOrderByContext().GetItems().IsEmpty())
{
return(Compare(x, y, selectCommandContext.GetOrderByContext().GetItems()));
}
return(Compare(x, y, selectCommandContext.GetGroupByContext().GetItems()));
}
private void SetGroupByForDistinctRow(SelectCommandContext selectCommandContext)
{
for (int index = 0; index < selectCommandContext.GetProjectionsContext().GetExpandProjections().Count; index++)
{
OrderByItem orderByItem = new OrderByItem(new IndexOrderByItemSegment(-1, -1, index, OrderDirectionEnum.ASC, OrderDirectionEnum.ASC));
orderByItem.SetIndex(index);
selectCommandContext.GetGroupByContext().GetItems().Add(orderByItem);
}
}
private bool IsMaxRowCount(SelectCommandContext shardingCommand)
{
return((shardingCommand.GetGroupByContext().GetItems().Any() ||
shardingCommand.GetProjectionsContext().GetAggregationProjections().Any()) && !shardingCommand.IsSameGroupByAndOrderByItems());
}
private bool IsNeedProcessGroupBy(SelectCommandContext selectCommandContext)
{
return(!selectCommandContext.GetGroupByContext().GetItems().IsEmpty() || !selectCommandContext.GetProjectionsContext().GetAggregationProjections().IsEmpty());
}
public override bool Read()
{
_currentRow.Clear();
if (OrderByValuesQueue.IsEmpty())
{
return(false);
}
if (IsFirstNext)
{
base.Read();
}
if (AggregateCurrentGroupByRowAndNext())
{
_currentGroupByValues = new GroupByValue(GetCurrentStreamDataReader(), _selectCommandContext.GetGroupByContext().GetItems()).GetGroupValues();
}
return(true);
}
public GroupByStreamMergedDataReader(IDictionary <string, int> labelAndIndexMap, List <IStreamDataReader> streamDataReaders, SelectCommandContext selectCommandContext, SchemaMetaData schemaMetaData) : base(streamDataReaders, selectCommandContext, schemaMetaData)
{
this._selectCommandContext = selectCommandContext;
_currentRow = new List <object>(labelAndIndexMap.Count);
_currentGroupByValues = OrderByValuesQueue.IsEmpty()
? new List <object>(0) : new GroupByValue(GetCurrentStreamDataReader(), selectCommandContext.GetGroupByContext().GetItems()).GetGroupValues();
}
