public override Exceptional<IObject> Aggregate(AAttributeIndex attributeIndex, GraphDBType graphDBType, DBContext dbContext)
{
if (attributeIndex is UUIDIndex)
{
return new Exceptional<IObject>(new Error_NotImplemented(new System.Diagnostics.StackTrace(true), "Aggregating attribute UUID is not implemented!"));
}
else
{
var indexRelatedType = dbContext.DBTypeManager.GetTypeByUUID(attributeIndex.IndexRelatedTypeUUID);
// HACK: rewrite as soon as we have real attribute index keys
if (attributeIndex.IndexKeyDefinition.IndexKeyAttributeUUIDs.Count != 1)
{
return new Exceptional<IObject>(new Error_NotImplemented(new System.Diagnostics.StackTrace(true)));
}
var typeAttr = graphDBType.GetTypeAttributeByUUID(attributeIndex.IndexKeyDefinition.IndexKeyAttributeUUIDs.First());
ADBBaseObject oneVal = typeAttr.GetADBBaseObjectType(dbContext.DBTypeManager);
return new Exceptional<IObject>(attributeIndex.GetKeyValues(indexRelatedType, dbContext).AsParallel().Select(kv =>
{
var mul = oneVal.Clone(kv.Key);
mul.Mul(oneVal.Clone(kv.Value.Count()));
return mul;
}).Aggregate(oneVal.Clone(), (elem, result) => { result.Add(elem); return result; }));
}
}
public virtual IEnumerable<ObjectUUID> IndexSingleOperation(AAttributeIndex myIndex, ADBBaseObject myOperationValue, AttributeUUID myAttributeUUID, TypesOfBinaryExpression typeOfBinExpr, DBContext dbContext)
{
foreach (var keyValPair in myIndex.GetKeyValues(dbContext.DBTypeManager.GetTypeByUUID(myIndex.IndexRelatedTypeUUID), dbContext))
{
var res = Compare(keyValPair.Key.IndexKeyValues[0], myOperationValue);
if (res.Failed())
{
throw new GraphDBException(res.PushIError(new Error_InvalidIndexOperation(myIndex.IndexName, keyValPair.Key.IndexKeyValues[0].Value, myOperationValue.Value)).IErrors);
}
if (res.Value)
{
foreach (var aUUID in keyValPair.Value)
{
yield return aUUID;
}
}
}
yield break;
}
public override Exceptional<FuncParameter> Aggregate(AAttributeIndex attributeIndex, GraphDBType graphDBType, DBContext dbContext)
{
if (attributeIndex.IsUUIDIndex)
{
return new Exceptional<FuncParameter>(new Error_NotImplemented(new System.Diagnostics.StackTrace(true), "AVG(UUID) is not implemented!"));
}
var indexRelatedType = dbContext.DBTypeManager.GetTypeByUUID(attributeIndex.IndexRelatedTypeUUID);
// HACK: rewrite as soon as we have real attribute index keys
ADBBaseObject aADBBaseObject = new DBDouble(DBObjectInitializeType.Default);
DBUInt64 total = new DBUInt64((UInt64)0);
foreach (var idxEntry in attributeIndex.GetKeyValues(indexRelatedType, dbContext))
{
aADBBaseObject.Add(aADBBaseObject.Clone(idxEntry.Key));
total += (UInt64)idxEntry.Value.LongCount();
}
aADBBaseObject.Div(total);
return new Exceptional<FuncParameter>(new FuncParameter(aADBBaseObject));
}
public override IEnumerable<ObjectUUID> IndexSingleOperation(AAttributeIndex myIndex, ADBBaseObject myOperationValue, AttributeUUID myAttributeUUID, TypesOfBinaryExpression typeOfBinExpr, DBContext dbContext)
{
IndexKey lookup = new IndexKey(myAttributeUUID, myOperationValue, myIndex.IndexKeyDefinition);
var currentType = dbContext.DBTypeManager.GetTypeByUUID(myIndex.IndexRelatedTypeUUID);
var result = myIndex.Contains(lookup, currentType, dbContext);
if (result.Value)
{
var interestingUUIDs = myIndex.GetValues(lookup, currentType, dbContext);
foreach (var aIndexValue in myIndex.GetAllValues(currentType, dbContext))
{
foreach (var aUUID in aIndexValue)
{
if (!interestingUUIDs.Contains(aUUID))
{
yield return aUUID;
}
}
}
}
else
{
foreach (var aIndexValue in myIndex.GetKeyValues(currentType, dbContext).Select(kv => kv.Value))
{
foreach (var aUUID in aIndexValue)
{
yield return aUUID;
}
}
}
yield break;
}