User Story (Required on creation):

As an additional filtering option, it should be possible to filter by the existence of a variable

Functional Requirements (Required before implementation):

• In the UI, there is a variable exists filter that accepts a variable name (but not a value)

Technical Requirements (Required before implementation):

• Nothing in addition

Limitations of Scope (Optional):

Hints (Optional):

Implementation options:

1. This can be implemented either only in the frontend by translating it to a process variable like search with a full wildcard (needs validation that the Wildcard semantics are the same on the supported databases)
2. It can be implemented as a dedicated backend filtering option