protected override Expression VisitMethodCall(MethodCallExpression m)
{
if (m.Method.DeclaringType == typeof(Queryable))
{
if (m.Method.Name == "Where")
{
_sb.Append("SELECT * FROM (");
Visit(m.Arguments[0]);
_sb.Append(") WHERE ");
var lambda = (LambdaExpression)StripQuotes(m.Arguments[1]);
Visit(lambda.Body);
return(m);
}
if (m.Method.Name == "Select")
{
var lambda = (LambdaExpression)StripQuotes(m.Arguments[1]);
var projection = new ColumnProjector().ProjectColumns(lambda.Body, _row);
_sb.Append("SELECT ");
_sb.Append(projection.Columns);
_sb.Append(" FROM (");
Visit(m.Arguments[0]);
_sb.Append(") ");
_projection = projection;
return(m);
}
}
throw new NotSupportedException(string.Format("The method '{0}' is not supported", m.Method.Name));
}
internal QueryBinder()
{
_columnProjector = new ColumnProjector(CanBeColumn);
}