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Creating database instances for JDBC connection pools
Specify a Java Naming and Directory Interface (JNDI) name to create a database data instance so that Pega Platform can access a database via a JDBC connection pool.
- The application server that is running Pega Platform manages database connections created by specifying JDBC connection pools for improved connection configuration ability. As best practice, when deploying on-premises or using client-managed cloud systems, use JDBC connection pools to define database instances. When deploying on Pega Cloud Services environments, use JDBC URLs. For more information, see Creating database instances for JDBC URLs.
- If you are connecting to an external database that differs from the internal PostgreSQL Pega Platform database, you must define the driver before making the database connection. To do so, you must download a JDBC driver version compatible with the Java version running on the Pega Platform application server, then define a new dynamic system setting for the driver. For more information, see Defining the database driver. For details about database support and your driver's Java compatibility, see the Platform Support Guide.
Connection pool configurations using JNDI depend on the version of the application server and the database platform that Pega Platform uses. Consult your database vendor documentation for more information.
- If the database platform of the additional database differs from the database platform of Pega Platform, or does not use postgresSQL, configure Pega Platform to access the database driver. For more information, see Defining the database driver.
- In the header of Dev Studio, click .
- Enter a short description, and in the Database field,
enter a name for the additional database. The database name is case-sensitive.
- Click Create and open. The Edit <YourNewDatabaseName> Database page appears.
- Optional: To indicate the system of record, in the Integration
system field, press the Down arrow key and select the name of
the integration system to associate with this database.The value that you select is for informational purposes only, and does not affect the behavior of the database instance. You can use this value to organize rules for integration connectors, data types, and sources for data pages.
- In the How to connect list, click Use JDBC Connection Pool.
- Enter the JNDI names that have update permission, administrative permission,
and read-only permission for the data source.JNDI names correspond to the credentials that you enter in the next step.
Note: Most use cases require a JNDI name only to pull information from the data source (step a). You should only complete the other fields (steps 7b through 8c) if you want to override the fields and credentials that Pega Platform imports from the data source. If you do not want to override the imported fields and credentials, proceed to step 9.
- In the JNDI name field, enter the name of a JNDI data source that has read and update permission.
- Optional: In the Admin JNDI name field, enter the name of a JNDI data source that has permission to alter and create tables.
- Optional: In the Read-only JNDI name field, enter the name of a JNDI data source that has read-only permission.
- In the Authentication
section, add the required and any optional credentials for the external database
- To add standard users, in the Username field,
enter the name of a database user who has read and update permission,
and in the Password field, enter the password for
that user.Specify a user that is capable of accepting unqualified table names and converting them to fully qualified table names. If this database is to be accessed through Connect SQL rules, confirm that this database user has search, update, delete, and other permissions that support the SQL statements in those rules, and that this database is the default database of the user.
- Optional: To add users with Administrator permissions, in the Admin
username field, enter the name of a database user who
has permission to alter and create tables, and in the Admin
password field, enter the password for that user.Specify a user is capable of to configuring tables that extend the data schema. The admin user is used for platform-generated schema changes, property optimization, and circumstance definitions.
- Optional: To add users with read-only permissions, in the Read-only
username field, enter the name of a database user who
has read-only permission, and in the Read-only
password field, enter the password for that user.Specify a user is capable of querying tables to pull database information, but cannot update, delete, change schemas, or otherwise interact with a database.
- To add standard users, in the Username field, enter the name of a database user who has read and update permission, and in the Password field, enter the password for that user.
- Click Save.
- Optional: Click the Advanced tab.
- Leave the Failover options fields blank. They are reserved for future use.
- Optional: To specify a proxy class for determining access privileges to the Schema Tools,
Query Inspector, and Query Runner landing pages, in the Proxyclass
name field, enter the proxy class.The proxyclass is used with the read-only user that you define on the Database tab.
- Optional: If this database is used for tables that you have configured for use by Pega Platform and the BLOB user-defined function is installed on the database, select the Use UDF for property lookup check box for best performance of Pega:Lookup tag references.
- Optional: On the Advanced tab, specify the names of other database
instances that should be reachable by views in this database.
- Under the Database Name list, click the Add item icon.
- In the Database Name field, press the Down arrow key, and select the name of a database instance that views in the external database need to access.
For example: This database instance describes the EXTERNAL1 database. Your Pega application needs to access a view in EXTERNAL1 that joins data from the DATA1 and DATA2 databases. Do the following steps:
- Define database instances for DATA1 and DATA2.
- On the database instance for EXTERNAL1, list DATA1 and DATA2 as other databases.
- Click Save.
- To test the database connection, on the Database tab,
click Test connection.
- If the test fails, diagnostic information appears in a new window. Modify the database instance until the test succeeds.
- This test does not test the administrative user, if any, that you might have specified.
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