protected override Expression VisitSimpleDbProjection(ProjectionExpression pex)
{
Expression qex = VisitSimpleDbQuery(pex.Source);
return SimpleDbExpression.Project(
(QueryExpression)qex,
pex.Projector);
}
public static ProjectionExpression Rewrite(ProjectionExpression pex)
{
Expression projector = pex.Projector;
if (projector is LambdaExpression)
{
projector = CreateProjector((LambdaExpression)projector);
}
else
{
projector = CreateDefaultProjector();
}
return new ProjectionExpression(
pex.Source,
projector
);
}
protected override Expression VisitSimpleDbProjection(ProjectionExpression pex)
{
return this.AggregateAndReduce(pex);
}
protected override Expression VisitSimpleDbProjection(ProjectionExpression pex)
{
_projector = pex.Projector;
VisitSimpleDbQuery(pex.Source);
return pex;
}
protected virtual Expression VisitSimpleDbProjection(ProjectionExpression pex)
{
return pex;
}
protected override Expression VisitSimpleDbProjection(ProjectionExpression pex)
{
return SimpleDbExpression.Project(
(QueryExpression)Visit(pex.Source),
pex.Projector);
}