SYS.REFLECTION_DEPENDENCIES

The sys.reflection_dependencies table contains metadata for reflection dependencies in the Dremio instance.

Syntax

SELECT *
FROM sys.reflection_dependencies

note

In Dremio 20+, the sys.dependencies table has been renamed to sys.reflection_dependencies.

Example Output

reflection_id	dependency_id	dependency_type	dependency_path
58ef99d2-ac06-4886-b76f-da729b872db0	be2f17da-6c09-4eb9-9fba-db5a76d6d773	DATASET	[@dremio, nested_nested1]
cc8b4c93-c028-427e-b773-8e5aab75c130	67fedcc9-841f-41d9-8344-03b826c8c9c2	DATASET	[Samples, samples.dremio.com, SF_incidents2016.json]
2acccebb-9fe2-4864-b714-664434b0ed37	3a276914-bf82-4447-b146-336e950e96e0	DATASET	[Samples, samples.dremio.com, NYC-taxi-trips]
31e1a2ec-4815-4efb-805d-00c427d00077	2ece1ecb-e436-46c1-97dd-ffe50d2d96b2	DATASET	[Samples, samples.dremio.com, zips.json]
4d42481b-802a-437d-a1c9-9a9dd8d9be03	432d5845-b258-4268-b6ab-7681c9afa184	DATASET	[@dremio, test_parquet]
9fca062d-9ef0-4ece-aae2-00eb9d3ae4d6	90a00924-80af-47f2-b2bb-4e5bc2d482ff	REFLECTION	[]

Fields

Field	Data Type	Description
reflection_id	varchar	The UUID to identify the reflection.
dependency_id	varchar	The UUID to identify the reflection dependency, which is one of these objects: If the reflection is defined on a table: the table from which the reflection is derived, either by being defined directly on the table or by being defined on a view that is ultimately derived from the table If the reflection is defined on a view: the table or tables that the view is ultimately derived from. If there is more than one table, then this column includes the UUID of each table. If the reflection is dependent on another reflection (for example, an aggregation reflection that is dependent on a raw reflection, and can be refreshed only after the raw reflection is refreshed): the reflection that must be refreshed first Note: Only Dremio can create such a relationship between two reflections.
dependency_type	varchar	The type of object that must be refreshed before the reflection can be refreshed. Enum: DATASET, REFLECTION
dependency_path	varchar	The path of the object, if it is a table. If the object is another reflection, the path is empty.