public Task <IPhysicalOperator <RowHolder> > BuildStatement(Sql.sqlStatement statement, ITransaction tran, IPhysicalOperator <RowHolder> source, InputStringNormalizer inputStringNormalizer)
{
Sql.columnSelect[] columns = new Sql.columnSelect[0];
Tuple <Sql.aggType, string>[] aggregates = new Tuple <Sql.aggType, string> [0];
if (!statement.Columns.IsStar)
{
columns = (((Sql.selectType.ColumnList)statement.Columns).Item).ToArray();
aggregates = columns
.Where(c => c.IsAggregate == true)
.Select(c => ((Sql.columnSelect.Aggregate)c).Item).ToArray();
}
if (statement.GroupBy.Any() || aggregates.Any())
{
string[] groupByColumns = statement.GroupBy.ToArray();
GroupByFunctors groupByFunctors = GroupByStatementBuilder.EvalGroupBy(groupByColumns, columns, source.GetOutputColumns());
IPhysicalOperator <RowHolder> phyOpGroupBy = new PhyOpGroupBy(source, groupByFunctors);
return(Task.FromResult(phyOpGroupBy));
}
else
{
return(Task.FromResult(source));
}
}
public PhyOpGroupBy(IPhysicalOperator <RowHolder> source, GroupByFunctors functors)
{
this.source = source;
this.functors = functors;
}
