private static void ProcessMaximized(SemqContext context, Predicate predicate, ref Chainer query)
{
var ix1 = context.GetNewIndex();
var ix2 = context.GetNewIndex();
var self = predicate.Subject;
context.SetIndex(self);
var maximizedExpression = predicate.MaximizedExpression;
var ordered = predicate.MaximizedType == MaximizationType.Min ?
new OrderedChainer(maximizedExpression, SortOrder.Asc) :
new OrderedChainer(maximizedExpression, SortOrder.Desc);
var root = new InternalNode(self);
query = root.GetDesigner()
.From(Designer.GetNewDesigner()
.From(((ISelect)query).Select(), root).As(ix1)
.OrderBy(ordered)
.Select().TopWithTies(predicate.MaximizedTop)
, root
).As(ix2);
self.ChangeIndex(ix2);
}
internal static TransactionOptions GetTransactionScopeOption(Assembly client, Map map, ConnectBy connectBy)
{
var tempNode = new InternalNode(map.ID);
var connectionData = ConnectionManager.GetConnectionData(client, connectBy, tempNode, null);
var scopeOption = new TransactionOptions();
scopeOption.Timeout = TimeSpan.FromSeconds(connectionData.CommandTimeout);
scopeOption.IsolationLevel = connectionData.MassDataOperationIsolationLevel.ToSystemEnum();
return(scopeOption);
}
internal static DbNode ProcessIntermediate(SemqContext context, Predicate predicate, DbNode innerNode, Link link)
{
var intermediate = new InternalNode(link.Intermediate);
context.AddNode(intermediate);
intermediate.IsFinalizeable = predicate.IsFinalizeable;
if (predicate.PredicateType == PredicateType.Quantified ||
predicate.PredicateType == PredicateType.TopQuantified)
{
((IPredicate)intermediate).AddPredicate(PredicateType.Cartesian, innerNode);
}
else
{
((IPredicate)intermediate).AddPredicate(PredicateType.Existential, innerNode);
}
predicate.Sentence = (ISemantic)intermediate;
return(intermediate);
}
private TableChainer _InjectJoinBy(DbNode node, string alias)
{
Chainer last = _tables[_tables.Count - 1];
Chainer next;
// skip .As
if (last.Next is AliasAs)
{
last = last.Next;
}
// skip .On/.By
if (last.Next is OnChainer || last.Next is ByChainer)
{
last = last.Next;
}
next = last.Next;
// inject .Join.By
var nodeToInsert = new InternalNode(node);
// pass FK to support multiple relations in column graph - !
((IRelation)nodeToInsert).FK = node.GetFK();
var by = ((ISemqJoin)last).Join(nodeToInsert).By(alias);
by.SetNext(next);
// add injected
JoinChainer source = (JoinChainer)_tables[_tables.Count - 1];
_targets.Add(source);
ByJoin(source);
return(source);
}
