public override Statement EmitDefinition(EmitMode mode)
{
TransitionConstraintDefinition statement = new TransitionConstraintDefinition();
statement.ConstraintName = Name;
statement.MetaData = MetaData == null ? null : MetaData.Copy();
if (_onInsertNode != null)
{
statement.OnInsertExpression = (Expression)_onInsertNode.EmitStatement(mode);
}
if (_onUpdateNode != null)
{
statement.OnUpdateExpression = (Expression)_onUpdateNode.EmitStatement(mode);
}
if (_onDeleteNode != null)
{
statement.OnDeleteExpression = (Expression)_onDeleteNode.EmitStatement(mode);
}
return(statement);
}
// Must be called with the original stack
protected BrowseTableItem CreateTable(IRow origin, bool forward, bool inclusive)
{
// Prepare the context variable to contain the origin value (0 if this is an unanchored set)
object contextVar;
Row localOrigin;
if (origin == null)
{
localOrigin = null;
contextVar = 0;
}
else
{
if ((origin.DataType.Columns.Count > 0) && (Schema.Object.Qualifier(origin.DataType.Columns[0].Name) != Keywords.Origin))
{
localOrigin = new Row(Manager, new Schema.RowType(origin.DataType.Columns, Keywords.Origin));
}
else
{
localOrigin = new Row(Manager, new Schema.RowType(origin.DataType.Columns));
}
origin.CopyTo(localOrigin);
contextVar = localOrigin;
}
int originIndex = ((localOrigin == null) ? -1 : localOrigin.DataType.Columns.Count - 1);
bool localInclusive = (localOrigin == null) ? true : inclusive;
// Ensure the browse node has the appropriate browse variant
lock (Node)
{
if (!Node.HasBrowseVariant(originIndex, forward, localInclusive))
{
Program.ServerProcess.PushGlobalContext();
try
{
Node.CompileBrowseVariant(Program, originIndex, forward, localInclusive);
}
finally
{
Program.ServerProcess.PopGlobalContext();
}
}
}
// Execute the variant with the current context variable
Program.Stack.Push(contextVar);
try
{
PlanNode browseVariantNode = Node.GetBrowseVariantNode(Program.Plan, originIndex, forward, localInclusive);
#if TRACEBROWSEEVENTS
Trace.WriteLine(String.Format("BrowseTableItem created with query: {0}", new D4TextEmitter().Emit(browseVariantNode.EmitStatement(EmitMode.ForCopy))));
#endif
return
(new BrowseTableItem
(
this,
(ITable)browseVariantNode.Execute(Program),
contextVar,
localOrigin,
forward,
inclusive
));
}
finally
{
Program.Stack.Pop();
}
}