1ST_CONN

If the keyword 1ST_CONN is defined for the tm_database parameter, the first database to which the application connects in the transaction will be used as the transaction manager database.

Care must be taken when using 1ST_CONN.

You should only use this configuration if it is easy to ensure that all databases involved are cataloged correctly. For example, use it in the following situations:

• The database client initiating the transaction is in the same instance as the participating databases and including the transaction manager database.
• You are using LDAP or DCE directory services to catalog and manage access to your databases.