luboid / DataReaderProjector

Simple not opinioned ORM which project DataReader over POCO object

Simple not opinioned ORM

When you have an old database with mismatch naming rules

SQL (oracle dialect) which define data set, need to be ordered by primary keys

select * from (
    select t.csuniq, t.csname, t.egn_ekpou,
           a.uniqid cauniq, a.cakind, a.cacity, a.capk,
           z.hivalue, z.hivdescr,
           pt.hivalue ptid, pt.hivdescr ptdescr,
           p.uniqid cpuniq, p.cpkind, p.cpareacode, p.cpphone, p.cpcontact
      from (select hivalue, hivdescr
              from bshintvalues
             where hiuniq = clients.typeaddr) z,
           (select hivalue, hivdescr
              from bshintvalues
             where hiuniq = clients.phonetype) pt,
           csphones p,
           csaddresses a, cscommon t
     where z.hivalue(+) = a.cakind
       and pt.hivalue(+) = p.cpkind
       and a.csuniq(+) = t.csuniq
       and p.csuniq(+) = t.csuniq
     order by t.csuniq, cauniq, cpuniq
) where rownum <= 20000

Map projected Customer class to dataset fields

var map = new Map<Customer>()
    .Property(m => m.Id, "csuniq")
    .Property(m => m.Name, "csname")
    .Property(m => m.EGN, "egn_ekpou")
    .Collection(m => m.Addresses, (address) =>
    {
        address
        .Property(a => a.Id, "cauniq")
        .Property(a => a.Kind, "cakind")
        .Property(a => a.City, "cacity")
        .Property(a => a.Zip, "capk")
        .Object(a => a.Type, (typ) =>
        {
            typ
            .Property(tp => tp.Id, "hivalue")
            .Property(tp => tp.Description, "hivdescr");
        });
    })
    .Collection(m => m.Phones, (phone) =>
    {
        phone
        .Property(p => p.Id, "cpuniq")
        .Property(p => p.Kind, "cpkind")
        .Property(p => p.AreaCode, "cpareacode")
        .Property(p => p.Number, "cpphone")
        .Property(p => p.Contact, "cpcontact")
        .Object(p => p.Type, (typ) =>
        {
            typ
            .Property(tp => tp.Id, "ptid")
            .Property(tp => tp.Description, "ptdescr");
        });
    });

Now execute SQL and get Customers

using var conn = CreateConnection();

conn.Open();

foreach (var c in conn.Enumerate(CommandType.Text, commandText, null, map))