According to the certification matrix available on the Oracle Technology Network, you cannot install and run Oracle 10g on 32-bit Solaris. The matrix can be found here.
If you choose Solaris Operating System (SPARC) as the platform, and Oracle Enterprise Edition, you will see the following under Critical Notes:
- If the Server product is 64-bit then 64-bit hardware (processors) is required.
- Solaris OS versions 7, 8 and 9 can be either 32-bit or 64-bit, however Oracle 9.2 64-bit is only certified with Solaris OS versions 8, 9 and 10.
- Oracle10g is only 64-bit.
This was first published in February 2006