Chainer ISemantic.Translate(SemqContext context, DbNode predecessor)
{
if (context == null)
{
throw new QueryTalkException(this, QueryTalkExceptionType.NullArgumentInnerException,
"context = null", "InternalNode.ISemantic.Translate");
}
if (predecessor == null)
{
throw new QueryTalkException(this, QueryTalkExceptionType.NullArgumentInnerException,
"predecessor = null", "InternalNode.ISemantic.Translate");
}
context.SetIndex(this);
var from = GetDesigner().From(new Table(Map.Name, new AliasAs(Index)));
if (!((IPredicate)this).HasPredicate)
{
return(from);
}
var predicate = ((IPredicate)this).Predicates[0];
var relation = DbMapping.GetRelation(predecessor.SynonymOrThis.NodeID, NodeID, DB3.Default);
var relationExpression = relation.BuildRelation(predecessor.SynonymOrThis.NodeID, predecessor.Index, Index).E();
if (predicate.PredicateType == PredicateType.Cartesian)
{
var innerNode = ((ISemantic)predicate).Subject;
context.SetIndex(innerNode);
innerNode.QueryRoot = context.Subject;
var innerJoinAs = from
.InnerJoin((IOpenView)innerNode)
.As(innerNode.Index);
var joinRelation = DbMapping.GetRelation(NodeID, innerNode.SynonymOrThis.NodeID, DB3.Default);
var joinExpression = joinRelation.BuildRelation(NodeID, Index, innerNode.Index).E();
var on = innerJoinAs
.On(joinExpression);
if (IsFinalizeable)
{
return(on.Where(relationExpression));
}
else
{
return(on);
}
}
else
{
return((Chainer)from.WhereExists(
(INonSelectView)
((ISemantic)predicate).Translate(context, this), true)
.AndWhere(relationExpression, true));
}
}
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);
}