private Expression BindSelect(Type resultType, Expression source, LambdaExpression selector)
{
ProjectionExpression projection = (ProjectionExpression)this.Visit(source);
this.map[selector.Parameters[0]] = projection.Projector;
Expression expression = this.Visit(selector.Body);
string alias = this.GetNextAlias();
ProjectedColumns pc = this.ProjectColumns(expression, alias, GetExistingAlias(projection.Source));
return(new ProjectionExpression(
new SelectExpression(resultType, alias, pc.Columns, projection.Source, null),
pc.Projector
));
}
private Expression BindWhere(Type resultType, Expression source, LambdaExpression predicate)
{
ProjectionExpression projection = (ProjectionExpression)this.Visit(source);
this.map[predicate.Parameters[0]] = projection.Projector;
Expression where = this.Visit(predicate.Body);
string alias = this.GetNextAlias();
ProjectedColumns pc = this.ProjectColumns(projection.Projector, alias, GetExistingAlias(projection.Source));
return(new ProjectionExpression(
new SelectExpression(resultType, alias, pc.Columns, projection.Source, where),
pc.Projector
));
}