İptal Edildi

C# - Port a database adaptor from Firebird to PostGres/MSSQL/Oracle & MySQL

I have developed an ORM system that currently uses Firebird SQL database as a back-end. I have a produced an abstract Database class whereby each database that I will support will be inherited from a class called "Database".

I need assemblies making for PostGres/MSSql/Oracle/MySQL (and potentially other databases) so that I can support all these different servers.

Please supply quotation PER DATABASE to be supported. If I am happy with your work we will renew contract for each database. Need to start with PostGres.

Each assembly will require some virtual methods to be overridden to support 3 forms of functionality:

1) Inherit DataBase class and implement virtual functions for Backup, Restore and NewDatabase - ideally should forward request on to official DB backup/restore utility - ideally through API or could spawn command line if no .net API available. This will allow my app to easily create/backup/restore a database providing a folder and filename where backup / database is to be located.

2) Provide a subclass within the database class called TFunctions which should list as static methods all the internal stock database functions the database supports (COALESCE(..,..,...), ABS()), CONCAT() etc:

public abstract class FbSqlFunctions : [login to view URL]

{

protected Expression COALESCE(params Expression[] expressions)

{

var expressionList = [login to view URL](o => [login to view URL]).ToList();

var expressionStringList = [login to view URL](expressionList);

return new Expression()

{

Value = $"COALESCE({expressionStringList}"

};

}

}

If it turns out that certain functions are supported by all the database servers then the function should be moved to the base class to avoid duplication of code in sub-classes.

3:

Each database may have slightly different syntax for creating tables / views /triggers. So third area is to inherit functions such as CreateView(Name, Fields,Text) -> and spit out the correct SQL each given DB server. Again keep as much common notation as possible in base class to avoid replication.

Project ready to start immediately.

PostGres is priority. We will start with that. If I am happy with your work Then we will proceed to implement the other 3 databases and probably 4-5 less well known databases.

Beceriler: .NET, C# Programlama, Uzantılar ve Eklentiler, PostgreSQL

Daha fazlasını gör: free sql database, mysql to postgresql converter, sql server to postgresql conversion tool, copy data from sql server to postgresql, sql server to postgresql migration tool free, switching from mysql to postgresql, oracle to postgres data transfer, pgloader mysql to postgresql

İşveren Hakkında:
( 1 değerlendirme ) Stirling, United Kingdom

Proje NO: #18728605

Bu iş için 2 freelancer ortalamada $189 teklif veriyor

$155 USD in 3 gün içinde
(12 Değerlendirme)
4.8
bernabanmaximus

Hi, I will provide implementation with integration tests for PGSQL as a beginning, I would give same quote for each of MSSql/Oracle/MySQL. this is my linkedin profile for you to check it [login to view URL] Daha Fazla

$222 USD in 5 gün içinde
(0 Değerlendirme)
0.0