public override Task <bool> Open(Int64 auditKey, SelectQuery query, CancellationToken cancellationToken)
{
AuditKey = auditKey;
if (query == null)
{
query = new SelectQuery();
}
var requiredSorts = RequiredSortFields();
if (query.Sorts != null && query.Sorts.Count > 0)
{
for (var i = 0; i < requiredSorts.Count; i++)
{
if (query.Sorts[i].Column == requiredSorts[i].Column)
{
requiredSorts[i].Direction = query.Sorts[i].Direction;
}
else
{
break;
}
}
}
query.Sorts = requiredSorts;
var returnValue = PrimaryTransform.Open(auditKey, query, cancellationToken);
return(returnValue);
}
public override async Task <bool> Open(Int64 auditKey, SelectQuery query, CancellationToken cancellationToken)
{
AuditKey = auditKey;
if (query == null)
{
query = new SelectQuery();
}
query.Sorts = RequiredSortFields();
var returnValue = await PrimaryTransform.Open(auditKey, query, cancellationToken);
//check if the transform has already sorted the data, using sql or a presort.
_alreadySorted = SortFieldsMatch(_sortFields, PrimaryTransform.SortFields);
return(returnValue);
}
// public override List<Sort> SortFields => new List<Sort>();
public override async Task <bool> Open(long auditKey, SelectQuery query, CancellationToken cancellationToken)
{
AuditKey = auditKey;
var primarySorts = new List <Sort>();
var referenceSorts = new List <Sort>();
//we need to translate filters and sorts to source column names before passing them through.
if (query?.Sorts != null)
{
foreach (var sort in query.Sorts)
{
if (sort.Column != null)
{
var column = PrimaryTransform.CacheTable[sort.Column.Name];
if (column != null)
{
primarySorts.Add(new Sort(column, sort.Direction));
}
column = ReferenceTransform.CacheTable[sort.Column.Name];
if (column != null)
{
referenceSorts.Add(new Sort(column, sort.Direction));
}
}
}
}
var primaryQuery = new SelectQuery()
{
Sorts = primarySorts
};
var referenceQuery = new SelectQuery()
{
Sorts = referenceSorts
};
var returnValue = await PrimaryTransform.Open(auditKey, primaryQuery, cancellationToken);
if (!returnValue)
{
return(false);
}
returnValue = await ReferenceTransform.Open(auditKey, referenceQuery, cancellationToken);
//if the primary & reference transforms are sorted, we will merge sort the items.
if (PrimaryTransform.SortFields != null && ReferenceTransform.SortFields != null)
{
var newSortFields = new List <Sort>();
_primarySortOrdinals = new List <int>();
_referenceSortOrdinals = new List <int>();
var index = 0;
var referenceSortFields = ReferenceTransform.SortFields;
foreach (var sortField in PrimaryTransform.SortFields)
{
if (referenceSortFields.Count <= index)
{
break;
}
var referenceSortField = referenceSortFields[index];
if (sortField.Column.Name == referenceSortField.Column.Name &&
sortField.Direction == referenceSortField.Direction)
{
newSortFields.Add(sortField);
_primarySortOrdinals.Add(PrimaryTransform.CacheTable.GetOrdinal(sortField.Column.Name));
_referenceSortOrdinals.Add(ReferenceTransform.CacheTable.GetOrdinal(sortField.Column.Name));
}
else
{
break;
}
index++;
}
if (newSortFields.Count > 0)
{
_sortedMerge = true;
CacheTable.OutputSortFields = newSortFields;
}
}
return(returnValue);
}
public override async Task <bool> Open(Int64 auditKey, SelectQuery query, CancellationToken cancellationToken)
{
AuditKey = auditKey;
if (query == null)
{
query = new SelectQuery();
}
//only apply a sort if there is not already a sort applied.
// if(query.Sorts == null || query.Sorts.Count == 0)
query.Sorts = RequiredSortFields();
var returnValue = await PrimaryTransform.Open(auditKey, query, cancellationToken);
if (!returnValue)
{
return(false);
}
var referenceQuery = new SelectQuery()
{
Sorts = RequiredReferenceSortFields()
};
returnValue = await ReferenceTransform.Open(auditKey, referenceQuery, cancellationToken);
if (!returnValue)
{
return(false);
}
//check if the primary and reference transform are sorted in the join
if (SortFieldsMatch(RequiredSortFields(), PrimaryTransform.SortFields) && SortFieldsMatch(RequiredReferenceSortFields(), ReferenceTransform.SortFields))
{
JoinAlgorithm = EJoinAlgorithm.Sorted;
}
else
{
JoinAlgorithm = EJoinAlgorithm.Hash;
}
//store the ordinals for the joins to improve performance.
if (_joinColumns == null)
{
_joinKeyOrdinals = new int[0];
_sourceKeyOrdinals = new int[0];
}
else
{
_joinKeyOrdinals = new int[_joinColumns.Length];
_sourceKeyOrdinals = new int[_joinColumns.Length];
for (var i = 0; i < _joinColumns.Length; i++)
{
_joinKeyOrdinals[i] = ReferenceTransform.GetOrdinal(_joinColumns[i].JoinColumn.Name);
_sourceKeyOrdinals[i] = _joinColumns[i].SourceColumn == null ? -1 : PrimaryTransform.GetOrdinal(_joinColumns[i].SourceColumn.Name);
}
}
return(true);
}
