Coding for Multiple Databases in C/C++?

scorp1us asks: "I'm working on a project which was coded in C/C++ to use a MySQL database. I've since been ordered to make it work with other databases as well. I found one that was close to what I want, SQLAPI++, but it is not database agnostic. You end up using the same function calls but you also end up having SQL for each database. I'm looking for a product that looks like DirectX, but for databases (DirectX emulates features in software if no hardware acceleration is present.) PHP's ADOdb is what I want, but I need it in C/C++. Has anyone seen something like this? My last requirment that it must work for MySQL, MS SQL server, and Informix, and work under Win32 and Linux."

Comments

Your own calls.

[martin]

Do the database abtraction yourself (I'll tell you why later..).

the code should be compartmentalised so there's a switch somewhere (either runtime of compile time) thats says - for this database do that to get the data I need in the datastructure (or put the data into the ddb).

Now as to why....

most RDBMS's have wonder extentions to SQL and difference ways of doing this. In order to optimise a certain query or insert/update you'll have to to mangle the SQL accordingly. Also some make heavy used of stored procedures for optimising techniques and others have no idea of a SP.

It's like porting to code from one language to another - SQL isn't generic enough IMHO to make you RDBMS perform at a consistent rate of knots.

Also many Big Iron RDBMS (Oracle, DB2) assume you access to a Database Administor who can monitor the database and keep things ticking over. Others, eg SQL-Server, don't assume this (which can or cannot be helpful) etc etc.