Hello BillB,

Welcome to the Monastery. I am reading your question and I am getting confused, what module has version 1.20? You are referring to DBI or DBD::Oracle? None of these modules latest version is 1.20, can you provide us a bit more information. Where your code is failing, sample of code and error?

To answer your question on how to downgrade a module. Maybe there are different ways but I would remove the module and install the version that I desire. How to remove the module? Simply use another module to that for you, for example App::cpanminus sample of command: cpanm --uninstall DBD::Oracle. But to be honest usually the solution is to upgrade to a latest version not to downgrade version.

Having said that I would recommend to updade your cpan, simply by doing this: install CPAN and after reload cpan the upper and lower case of the characters is important.

As a last step I would upgrade all the modules to the latest version. There are several ways to do it, I usually do it like: cpan[1]> upgrade. Sample of alternative solution from the forum safe way to upgrade module.

Hope this helps, BR.

DBD::Oracle is the oracle interface for the DBI module. The reason tha
+t I need to get 1.20 into my perl deployment follows from CPAN.  I ha
+ve oracle 8iR3

From version 1.25 onwards DBD::Oracle only support Oracle clients 9.2 
+or greater. Support for ProC connections was dropped in 1.29.

If you are still stuck with an older version of Oracle or its client y
+ou might want to look at the table below.

  +---------------------+---------------------------------------------
+--------+
  |                     |                   Oracle Version            
+        |
  +---------------------+----+-------------+---------+------+--------+
+--------+
  | DBD::Oracle Version | <8 | 8.0.3~8.0.6 | 8iR1~R2 | 8iR3 |   9i   |
+ 9.2~11 |
  +---------------------+----+-------------+---------+------+--------+
+--------+
  |      0.1~16         | Y  |      Y      |    Y    |  Y   |    Y   |
+    Y   |
  +---------------------+----+-------------+---------+------+--------+
+--------+
  |      1.17           | Y  |      Y      |    Y    |  Y   |    Y   |
+    Y   |
  +---------------------+----+-------------+---------+------+--------+
+--------+
  |      1.18           | N  |      N      |    N    |  Y   |    Y   |
+    Y   |
  +---------------------+----+-------------+---------+------+--------+
+--------+
  |      1.19           | N  |      N      |    N    |  Y   |    Y   |
+    Y   |
  +---------------------+----+-------------+---------+------+--------+
+--------+
  |      1.20           | N  |      N      |    N    |  Y   |    Y   |
+    Y   |
  +---------------------+----+-------------+---------+------+--------+
+--------+
  |      1.21~1.24      | N  |      N      |    N    |  N   |    Y   |
+    Y   |
  +---------------------+----+-------------+---------+------+--------+
+--------+
  |      1.25+          | N  |      N      |    N    |  N   |    N   |
+    Y   |
  +---------------------+----+-------------+---------+------+--------+
+--------+

As there are dozens of different versions of Oracle's clients this lis
+t does not include all of them, just the major released versions of O
+racle.

My @INC is
@INC:
  C:/Perl64/site/lib
  C:/Perl64/lib
  .

I installed cpanm, but when I tried the uninstall it returned the foll
+owing

C:\sql> cpanm --uninstall DBD::Oracle
! DBD::Oracle is not found in the following directories and can't be u
+ninstalled
.

  C:\Perl64\site\lib
  C:\Perl64\site\lib

When I ran the perl Makefile.PL and then dmake in the downloaded I get
+ the following

C:\temp5\DBD-Oracle-1.20>perl Makefile.PL
Multiple copies of Driver.xst found in: C:/Perl64/site/lib/auto/DBI/ C
+:/Perl64/l
ib/auto/DBI/ at Makefile.PL line 35.
Using DBI 1.639 (for perl 5.024003 on MSWin32-x64-multi-thread) instal
+led in C:/
Perl64/site/lib/auto/DBI/

Configuring DBD::Oracle for perl 5.024003 on MSWin32 (MSWin32-x64-mult
+i-thread)

Remember to actually *READ* the README file! Especially if you have an
+y problems
.

Using Oracle in C:/app/Oracle12c/product/12.2.0/dbhome_1
DEFINE _SQLPLUS_RELEASE = "1202000100" (CHAR)
Oracle version 12.2.0.1 (12.2)
Found oci directory
Using OCI directory 'oci'

Checking for functioning wait.ph


System: perl5.024003
Compiler:   C:\Perl64\site\bin\gcc.exe -s -O2  -s -O2 -DWIN32 -DWIN64 
+-DCONSERVA
TIVE -DPERL_TEXTMODE_SCRIPTS -DUSE_SITECUSTOMIZE -DPERL_IMPLICIT_CONTE
+XT -DPERL_
IMPLICIT_SYS -fwrapv -fno-strict-aliasing -mms-bitfields
Linker:     not found
Sysliblist:

Checking if your kit is complete...
Looks good
Warning (mostly harmless): No library found for -lmoldname
Warning (mostly harmless): No library found for -lkernel32
Warning (mostly harmless): No library found for -luser32
Warning (mostly harmless): No library found for -lgdi32
Warning (mostly harmless): No library found for -lwinspool
Warning (mostly harmless): No library found for -lcomdlg32
Warning (mostly harmless): No library found for -ladvapi32
Warning (mostly harmless): No library found for -lshell32
Warning (mostly harmless): No library found for -lole32
Warning (mostly harmless): No library found for -loleaut32
Warning (mostly harmless): No library found for -lnetapi32
Warning (mostly harmless): No library found for -luuid
Warning (mostly harmless): No library found for -lws2_32
Warning (mostly harmless): No library found for -lmpr
Warning (mostly harmless): No library found for -lwinmm
Warning (mostly harmless): No library found for -lversion
Warning (mostly harmless): No library found for -lodbc32
Warning (mostly harmless): No library found for -lodbccp32
Warning (mostly harmless): No library found for -lcomctl32
LD_RUN_PATH=C:/app/Oracle12c/product/12.2.0/dbhome_1/lib:C:/app/Oracle
+12c/produc
t/12.2.0/dbhome_1/rdbms/lib
Using DBD::Oracle 1.20.
Using DBD::Oracle 1.20.
Multiple copies of Driver.xst found in: C:/Perl64/site/lib/auto/DBI/ C
+:/Perl64/l
ib/auto/DBI/ at Makefile.PL line 1657.
Using DBI 1.639 (for perl 5.024003 on MSWin32-x64-multi-thread) instal
+led in C:/
Perl64/site/lib/auto/DBI/
Generating a dmake-style Makefile
Writing Makefile for DBD::Oracle
Writing MYMETA.yml and MYMETA.json

***  If you have problems...
     read all the log printed above, and the README and README.help.tx
+t files.
     (Of course, you have read README by now anyway, haven't you?)


C:\temp5\DBD-Oracle-1.20>dmake
cp lib/DBD/Oracle/GetInfo.pm blib\lib\DBD\Oracle\GetInfo.pm
cp oraperl.ph blib\lib/oraperl.ph
cp ocitrace.h blib\arch\auto\DBD\Oracle/ocitrace.h
cp Oracle.h blib\arch\auto\DBD\Oracle/Oracle.h
cp Oraperl.pm blib\lib/Oraperl.pm
cp mk.pm blib\arch\auto\DBD\Oracle/mk.pm
cp mkta.pl blib\lib\DBD\mkta.pl
cp dbdimp.h blib\arch\auto\DBD\Oracle/dbdimp.h
cp Oracle.pm blib\lib\DBD\Oracle.pm
Running Mkbootstrap for Oracle ()
"C:\Perl64\bin\perl.exe" -MExtUtils::Command -e chmod -- 644 "Oracle.b
+s"
"C:\Perl64\bin\perl.exe" -MExtUtils::Command::MM -e cp_nonempty -- Ora
+cle.bs bli
b\arch\auto\DBD\Oracle\Oracle.bs 644
"C:\Perl64\bin\perl.exe" -p -e "s/~DRIVER~/Oracle/g" C:\Perl64\site\li
+b\auto\DBI
\Driver.xst > Oracle.xsi
"C:\Perl64\bin\perl.exe" "C:\Perl64\lib\ExtUtils\xsubpp"  -typemap C:\
+Perl64\lib
\ExtUtils\typemap -typemap C:\temp5\DBD-Oracle-1.20\typemap  Oracle.xs
+ > Oracle.
xsc
"C:\Perl64\bin\perl.exe" -MExtUtils::Command -e mv -- Oracle.xsc Oracl
+e.c
C:\Perl64\site\bin\gcc.exe -c  -IC:/app/Oracle12c/product/12.2.0/dbhom
+e_1/oci/in
clude -IC:/app/Oracle12c/product/12.2.0/dbhome_1/rdbms/demo -IC:\Perl6
+4\site\lib
\auto\DBI       -s -O2 -DWIN32 -DWIN64 -DCONSERVATIVE -DPERL_TEXTMODE_
+SCRIPTS -D
USE_SITECUSTOMIZE -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -fwrapv 
+-fno-stric
t-aliasing -mms-bitfields -s -O2          -DVERSION=\"1.20\"    -DXS_V
+ERSION=\"1
.20\"  "-IC:\Perl64\lib\CORE"  -Wall -Wno-comment -DUTF8_SUPPORT -DNEW
+_OCI_INIT
-DORA_OCI_VERSION=\"12.2.0.1\" Oracle.c
Oracle.c: In function 'XS_DBD__Oracle__st_ora_execute_array':
Oracle.c:1535:14: error: 'sv_undef' undeclared (first use in this func
+tion)
Oracle.c:1535:14: note: each undeclared identifier is reported only on
+ce for eac
h function it appears in
Oracle.xs: In function 'XS_DBD__Oracle__st_cancel':
Oracle.xs:154:44: error: 'sv_yes' undeclared (first use in this functi
+on)
Oracle.xs:154:54: error: 'sv_no' undeclared (first use in this functio
+n)
Oracle.xs: In function 'XS_DBD__Oracle__db_reauthenticate':
Oracle.xs:166:62: error: 'sv_yes' undeclared (first use in this functi
+on)
Oracle.xs:166:72: error: 'sv_no' undeclared (first use in this functio
+n)
Oracle.xs: In function 'XS_DBD__Oracle__db_ora_lob_write':
Oracle.xs:194:11: error: 'sv_undef' undeclared (first use in this func
+tion)
Oracle.xs:219:11: error: 'sv_yes' undeclared (first use in this functi
+on)
Oracle.xs: In function 'XS_DBD__Oracle__db_ora_lob_append':
Oracle.xs:250:11: error: 'sv_undef' undeclared (first use in this func
+tion)
Oracle.xs:274:17: error: 'sv_yes' undeclared (first use in this functi
+on)
Oracle.xs: In function 'XS_DBD__Oracle__db_ora_lob_read':
Oracle.xs:330:13: error: 'sv_undef' undeclared (first use in this func
+tion)
Oracle.xs: In function 'XS_DBD__Oracle__db_ora_lob_trim':
Oracle.xs:362:11: error: 'sv_undef' undeclared (first use in this func
+tion)
Oracle.xs:365:11: error: 'sv_yes' undeclared (first use in this functi
+on)
Oracle.xs: In function 'XS_DBD__Oracle__db_ora_lob_length':
Oracle.xs:380:11: error: 'sv_undef' undeclared (first use in this func
+tion)
dmake.exe:  Error code 129, while making 'Oracle.o'

C:\temp5\DBD-Oracle-1.20>
[download]

Oracle.c:1535:14: error: 'sv_undef' undeclared (first use in this function

I think this happens because 'sv_undef' has been removed from the API and replaced with &PL_sv_undef.
Same goes for 'sv_yes' (now '&PL_sv_yes') and 'sv_no' (now '&PL_sv_no').

I think (untested) you'll get around that problem by prepending (in Oracle.xs) all sv_undef/sv_yes/sv_no occurrences with '&PL_'.

Cheers,
Rob

Following the instructions in the install file should work, you don't show your attempts or how the failed. How do I post a question effectively?.

Update: Fixed link.

I will search on the topic "using Perl with shared hosting" and see if it is what I need to do. Thanks

Have you considered DBD::ODBC ?

poj