Question

i am looking for an Delphi component to connect to an ORACLE database server in an direct way without install the oracle client.

i knew the Oracle Data Access (ODAC) from DevArt. there are any other component with this capability?

ODAC offers two connection modes to
the Oracle server: connection through
the Oracle Call Interface in Client
mode and direct connection over TCP/IP
in Direct mode. ODAC-based database
applications are easy to deploy, do
not require installation of other data
provider layers.

Thanks in advance.

Answer 1

No, there is no other Delphi Win32 libraries allowing to connect to Oracle without the installed Oracle Client. And, IMHO, that is correct, because:

1. OCI (Oracle Call Interface) is quite complex piece of software. I will say, it is most complex closed sourced DBMS Call Level Interface in the World. And it is changing from version to version. Oracle has official rule – the Oracle Client v X supports Oracle Server v X-1 … X+1. Because even such company as Oracle, dont want to spend resources to support and test all the protocol nuances across all possible versions. So, I dont think, that DevArt ever will implement 99.9% stable Oracle SQL*Net protocol implementation. And the INet posts proof that …
2. AFAIK, the ODAC Net mode does not support some of the Oracle Client important features and has some important limitations. Although it works well for simple data access scenarious.
3. If you will purchase Oracle support, then it will decline all your support requests, if they will know, that you are not using official client software. That is just Oracle rule.
4. If you dislike to install and tune the full scale Oracle Client, then you can just use Oracle Instant Client. Which does not require install or setup procedure. And you will be in safety in case of the different data access scenarious and Oracle Server versions.

PS: Although I may be considered as a biased person 🙂