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Test Definitions

A Test Definition describes a reusable data quality validation rule. It defines what to check, what parameters it accepts, and which data types it supports.
OpenMetadata ships with 25+ built-in test definitions. You can also create custom test definitions for organization-specific validations.

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Built-in vs Custom

  • Built-in test definitions are provided by the system (provider: "system") and cover common checks like null counts, value ranges, and uniqueness.
  • Custom test definitions are created via the API for organization-specific validation logic.

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Entity Type

Each test definition targets either a table or a column:

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Fully Qualified Name

The FQN for a test definition is simply its name:

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API Endpoints