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# Which Problems Are Solved
Implementing Instance table to new relational database schema
# How the Problems Are Solved
The following fields must be managed in this table:
- `id`
- `name`
- `default_org_id`
- `zitadel_project_id`
- `console_client_id`
- `console_app_id`
- `default_language`
- `created_at`
- `updated_at`
- `deleted_at`
The repository must provide the following functions:
Manipulations:
- create
- `name`
- `default_org_id`
- `zitadel_project_id`
- `console_client_id`
- `console_app_id`
- `default_language`
- update
- `name`
- `default_language`
- delete
Queries:
- get returns single instance matching the criteria and pagination,
should return error if multiple instances were found
- list returns list of instances matching the criteria, pagination
Criteria are the following:
- by id
pagination:
- by created_at
- by updated_at
- by name
### instance events
The following events must be applied on the table using a projection
(`internal/query/projection`)
- `instance.added` results in create
- `instance.changed` changes the `name` field
- `instance.removed` sets the the `deleted_at` field
- `instance.default.org.set` sets the `default_org_id` field
- `instance.iam.project.set` sets the `zitadel_project_id` field
- `instance.iam.console.set` sets the `console_client_id` and
`console_app_id` fields
- `instance.default.language.set` sets the `default_language` field
- if answer is yes to discussion: `instance.domain.primary.set` sets the
`primary_domain` field
### acceptance criteria
- [x] migration is implemented and gets executed
- [x] domain interfaces are implemented and documented for service layer
- [x] repository is implemented and implements domain interface
- [x] testing
- [x] the repository methods
- [x] events get reduced correctly
- [x] unique constraints
# Additional Context
- Closes https://github.com/zitadel/zitadel/issues/9935
