OpenLink ODBC Driver for PostgreSQL (Lite Edition) Installation and Configuration

Review Preinstallation Documentation: Pre-Installation Configuration for PostgreSQL Single-Tier Drivers (Unix)

Installation

Login to your Unix or Linux client machine.
Navigate to the $OPENLINK_INSTALL directory, e.g., /opt/openlink/.
The installation files ship as an installation shell script, driver and admin .taz archive files, and a license (.lic) file. All files should be transferred in binary at all times.
Run the following command to start the installation:
```
sh install.sh
```
You must choose a TCP port on which to run your HTTP-based iODBC Data Sources Administrator. The default is 8000. You will need to know this port number and your local machine's IP address or hostname to access your Admistrator in a Web browser. The URL follows this form --
```
http://driver-host.example.com:portnumber/
```
Log File? enables you to rename and/or relocate the Administrator's log file. It is usually best to go with the default.
You can choose to log all HTTP requests made to the Administrator. This is not diagnostic-level ODBC tracing nor connection logging. The default is no.
You can change the iODBC Data Source Administrator's default username from "admin." This is the name that you will need to login to OpenLink's HTTP-based iODBC Data Sources Administrator.
You can change the iODBC Data Source Administrator's default password from "admin."
The installation is complete.

Configuration

Jump to manual configuration docs: Manually Configure PostgreSQL Connectivity?

Execute the bash command to open a bash shell. If you do not have have the bash shell, substitute the sh command for the bash command. This will open the bourne shell.
Use the export command to set an OPL_LICENSE_DIR variable that points to the directory that contains your OpenLink license. This is typically the bin sub-directory of the OpenLink installation. However, you can put your license files in /etc/oplmgr/, the root of the installation, or virtually anywhere else.
Run the following command to set your ODBC environment variables:
```
. ./openlink.sh
```
cd into the bin sub-directory of your OpenLink installation.
Use the ls command to display your files.
The OpenLink License Manager is usually started by the environment variable script above. If you saw no message about this, you may need to manually start your own License Manager. Use this command:
```
oplmgr +start
```
Run the following command to start your HTTP-based iODBC Data Sources Administrator:
```
./iodbc-admin-httpd.sh start
```
Open a Web browser on any computer and type the URL for your administrator in the address bar.
Click the Client Components Administration link in the left hand side navigation bar.
Click the Configure ODBC Data Sources link in the left hand side navigation bar.
Then, login with your username and password.
Click the Add button.
Click the OpenLink PostgreSQL driver (multi-threaded). Then, click Create DSN.
Provide a descriptive name and optional description for your DSN. Then, click Next.
Pass the following values in the next dialog:
- Database Name - A valid PostgreSQL database name
- DB Connection Options -
  - -H PostgreSQL DBMS server hostname or IP — over-rides PGHOST, below
  - -P PostgreSQL TCP port — over-rides PGPORT, below
- Username - A valid PostgreSQL username
Click Next.
Set the following variables on the next dialog:
- Existing Environment - This arbitrary heading for a collection of DBMS-related environment variables usually corresponds with the DBMS version
- New Environment - You can choose a new heading
- PGHOST - Hostname or IP address of the PostgreSQL database server. Not necessary if -H was set in DB Connection Options, above.
- PGPORT - PostgreSQL TCP port. Not necessary if -P was set in DB Connection Options, above.
- CURSOR_SENSITIVITY - Enables or disables the row version cache used with dynamic cursors. When dynamic cursor sensitivity is set high, the Cursor Library calculates checksums for each row in the current rowset and compares these with the checksums (if any) already stored in the row version cache for the same rows when fetched previously. If the checksums differ for a row, the row has been updated since it was last fetched and the row status flag is set to SQL_ROW_UPDATED. The row version cache is then updated with the latest checksums for the rowset. From the user's point of view, the only visible difference between the two sensitivity settings is that a row status flag can never be set to SQL_ROW_UPDATED when the cursor sensitivity is low. (The row status is instead displayed as SQL_ROW_SUCCESS.) In all other respects, performance aside, the two settings are the same. Deleted rows don't appear in the rowset. Updates to the row since the row was last fetched are reflected in the row data, and inserted rows appear in the rowset, if their keys fall within the span of the rowset. If your application does not need to detect the row status SQL_ROW_UPDATED, you should leave the 'High Cursor Sensitivity' checkbox unchecked, as performance is improved. The calculation and comparison of checksums for each row fetched carries an overhead. If this option is enabled, the table oplrvc must have been created beforehand using the appropriate script for the target database.
- NO_QUOTED_IDENTIFIERS -
- HSODBC_FIX - Tick this box if Oracle HSODBC or DG4ODBC will be the client application used with this DSN.
Click Next.
You can set the following, optional values on the fourth dialog:
- Read-only connection - Specifies whether the connection is "Read-only." Make sure the checkbox is unchecked to request a "Read/Write" connection.
- Defer fetching of long data - Defers fetching of LONG (BINARY, BLOB etc.) data unless explicitly requested in a query. This provides significant performance increases when fields in query do not include LONG data fields.
- Disable interactive login - Suppresses the ODBC "Username" and "Password" login dialog boxes when interacting with your ODBC DSN from within an ODBC compliant application.
- Jet fix - This option facilitates translation of certain datatypes by the Microsoft Jet Engine. If you utilize MS applications, and you notice that money and other datatypes are mishandled, test with Jet fix enabled.
- No AutoCommit - Changes the default commit behaviour of the OpenLink driver. The default mode is AutoCommit (box unchecked).
- No RowSetSize limit - Disables a limitation enforced by the cursor library. This limitation is enforced by default. It prevents the driver from claiming all available memory in the event that a resultset generated from an erroneous query is very large. The limit is normally never reached.
Click Next.
Additional, optional parameters appear on the fifth, and final dialog:
- Row buffer size - This attribute specifies the number of records to be transported over the network in a single network hop. Values can range from 1 to 99.
- Max Rows - Allows you to define a limit on the maximum number of rows to be returned from a query. The default value of 0 means no limit.
- SQL_DBMS_Name - Manually overrides the SQLGetInfo(SQL_DBMS_NAME) response returned by the driver. This is required for products such as Microsoft InfoPath, for which the value must be "SQL Server".
- Initial SQL - Lets you specify a file containing SQL statements that will be run automatically against the database upon connection.
Click Next.
Your new DSN is highlighted and persisted on the the Data Sources tab. Click the Test tab.
Type your password in the password field and click test.
You have established a connection.

Proceed to Commercial Licensing Documentation

Should you decide to purchase a commercial license at the end of your evaluation period, be sure to consult our documentation which explains the placement and uptake of commercial license files and the use of our OpenLink License Manager technology: License Technology & Application