Understanding the Coexistence of 32-bit and 64-bit Oracle Clients

Asked 5 months ago, Updated 5 months ago, 15 views

We currently run business applications (created in VB.NET) on Windows Server 2012.
The 64-bit version of Oracle 12c (database and client) is installed on Windows 10 (x64) clients, maintaining applications and developing new applications in VisualStudio 2015's VB.NET.

This time, we have decided to deploy an application running on the 32-bit version of the Oracle client to the above clients.
Is it possible to coexist with the 64-bit and 32-bit versions of the Oracle client?
If possible, could you tell me how to do that?


2022-09-30 11:40

2 Answers

See notes 1243374.1 and 781432.1 in My Oracle Support, as documented in the documentation.

Pre-installation Tasks for Oracle Database Client

2.6.3 Independent 32-bit client software for 64-bit platforms

In Oracle Database 11g Release 2 (11.2) and later, 64-bit client software does not include 32-bit client binaries.If you need a 32-bit client binary on a 64-bit platform, you can install it from each 32-bit client software.

When installing 32-bit client binaries on a 64-bit platform, the installer checks for existing 32-bit software.

Please refer to:
If you are installing both 32-bit and 64-bit Oracle Database Client software on the same system, see notes 1243374.1 and 781432.1 in My Oracle Support:


2022-09-30 11:40

You can.
I think it's written somewhere on the Oracle home page, but you can do it by dividing the Oracle-based directory.

However, I remember that it was hard to find a 32-bit download path...
Also, I remember that the assembly version registered was different at 32bit and 64bit, but it didn't work properly.Some versions do not offer 32-bit versions.
The assumption is that there is no version specification for the 32-bit client, there is a 64-bit version and a version of the client, and that the newly deployed application will run in that version...

As I wrote earlier, I think coexistence was achieved by dividing the Oracle base directory (the dir name following the installation path c:\app\).

This is a memorandum from the previous environment, but for your reference...

2022-09-30 11:40

If you have any answers or tips

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