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Oracle

Posted Jun 21, 2005

Oracle on the Web, Part 4 - Upgrading HTML DB

By Steve Callan



In part 4 of the HTML DB series, I will cover the steps of upgrading to version 1.6 and creating a simple Web service. The upgrade/installation steps come straight out of the March 2005 Oracle® HTML DB Installation Guide, Release 1.6. The steps to create a simple Web service are from the Oracle® HTML DB 2 Day Developer document also available on the OTN Web site. In the last article, I mentioned the patch set for version 1.6. The patch set is available via MetaLink, so if you do not have access to Oracle Support Services, obtaining this patch may be a problem.


As a tip, locating the patch set number or file name can be somewhat of a chore when using the search interface at Patches & Updates. If the link for the patch does not work, look at the page source (the HTML code) and see where the hyperlink is supposed to send you. It turns out that the name of the zipped patch file is


aru=7180000&patch_file=
 p4173133_10103_GENERIC.zip


so at least now you know the name of the file to look for. The complete URI is:


http://updates.oracle.com/...GENERIC.zip



Pre-installation steps


The steps are few and easy to perform: ensure the shared pool is large enough, and that XML DB and Oracle Text are installed.


For checking the shared pool (at least 100MB), use the show parameter[s] command:


Oracle XML DB and Oracle Text must be installed (done for you if you used the Database Configuration Assistant). Each feature has it own set of developer guides in the RDBMS documentation set. Look for Oracle Text Application Developer's Guide under the TEX hyperlink in the list of books (it appears as "Text Application Developer's Guide").

There are several ways to determine if you have XML DB and Oracle Text installed. One way is to start the Universal Installer and look at the list of installed products.

Another way is to query dba_users, and if CTXSYS and XDB appear, chances are their respective objects are installed. Of course, that is not a guarantee, but if the users exist and their objects do not, what kind of clean up job was done in the first place? If necessary, you can reinstall both users and their objects automatically (stored in the SYSAUX tablespace) via DBCA or by using canned scripts. See the respective developer guides for installation instructions.

As always, taking a backup of your database is a prudent measure. Obtain version 1.6 from OTN (http://www.oracle.com/technology/products/database/htmldb/index.html) and extract the contents of the zip file. Navigate to the htmldb folder. In that folder, you will see the htmldbins.sql file. The command line syntax you will use is:

sqlplus sys/<password> as sysdba @htmldbins password sysaux sysaux temp /i/ none

where "none" indicates a local installation and password is the HTML DB administrator's password. The htmldbins script accomplishes the following in addition to a fresh installation:

Note: If at all possible, use the same HTML DB password during this step. If you use a new or different password, you will have more work to perform after the basic installation is finished.

The "/i/" parameter refers to an images directory, and assuming you are following along using a 10g database and your original HTML DB installation, replacing the images folder will be quite easy (more on that later). Upon initiating the script, you will see a considerable amount of text output (and hopefully with lots of "No errors" lines).

The time to complete took almost 12 minutes, and the most important output of all is "Upgrade completed successfully no errors encountered."

In your original (version 1.5) HTML DB installation, there is an images folder which must be replaced with the one under the htmldb folder (where the htmldbins script was just run from). The 1.6 installation guide recommends renaming the original in case you need to revert to it. Where is the installed images folder? Look for the marvel.conf file and confirm the location of your images folder. My original HTML DB installation path is c:\oracle\product\10.1.0, so locating the marvel.conf file was easy.

After the rename and copy steps:

Assuming no password changes are required, you should be able to start OPMN and try out the upgraded version of HTML DB. Start the process manager (Windows service) or use the opmnctl startall command (a status check is shown below).

Optional - Installing the Patch

If you have access to MetaLink, this is the page (same for other platforms) you are looking for:

The bugs are minor and none of them seems to have anything to do with a Web service.



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