"Setting up a schema in TypeORM when connecting to an Oracle database: A step-by-step guide

As a newcomer to TypeORM, I'm using Oracle DB with Node.js in the backend. Successfully connecting the database with TypeORM using createConnection(), but struggling to specify the schema during connection creation.

One workaround is adding the schema to each entity like this:

@Entity({schema: "Users"})

However, this solution is not feasible as the schema may change based on the development/test/production environments. The only viable option seems to be specifying it during connection creation.

After reviewing the TypeORM connection options documentation at https://github.com/typeorm/typeorm/blob/master/docs/connection-options.md, it appears that while there's a schema option for PostgreSQL and MySQL, there are no specific options listed for Oracle databases.

Answer №1

Within the Oracle database system, the terms "user" and "schema" essentially refer to the same entity. Typically, unless you possess high-level permissions or are a Database Administrator (DBA), you must directly connect to the user/schema you intend to interact with. Once your connection is established, it is not possible to switch to a different user/schema without reconnecting using new credentials.

If you do have elevated privileges that allow you to work with objects in schemas other than the one you initially connected to (such as having the create any table privilege), you can accomplish this by fully specifying the object name (e.g. schema_name.table_name) in your Data Definition Language (DDL), Data Manipulation Language (DML), or SQL statements. Reconnecting is not required in this scenario.

In situations where there is a shared application schema/user, the DBA can set up proxy user access, which enables you to connect as another user using your own credentials. This setup helps avoid the need to share common passwords or keys while ensuring that you remain connected to a specific schema/user.

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