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feat: property, virtual and materialized virtual property graphs in the client

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Each kind has its own create, open, describe, list and drop. Python create and open return handles: PropertyGraph.insert and rollback, and MaterializedVirtualPropertyGraph.refresh.
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Jack Ye
2026-09-29 01:00:11 -05:00
parent 6f68be2030
commit 973a793d18
13 changed files with 2092 additions and 831 deletions
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docs/src/python/python.md
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@@ -204,18 +204,19 @@ listing a storage directory.
## Property Graphs
A property graph is read as nodes and edges, in one of two modes. An
independent graph holds its own rows: define it with node and edge types, and
write it with
[insert_into_property_graph][lancedb.DBConnection.insert_into_property_graph].
A materialized view graph reads tables: define it with node and edge tables,
and bring it up to them with
[refresh_property_graph][lancedb.DBConnection.refresh_property_graph]. Manage
either with [create_property_graph][lancedb.DBConnection.create_property_graph],
[describe_property_graph][lancedb.DBConnection.describe_property_graph],
[rollback_property_graph][lancedb.DBConnection.rollback_property_graph],
[list_property_graphs][lancedb.DBConnection.list_property_graphs] and
[drop_property_graph][lancedb.DBConnection.drop_property_graph].
A property graph is read as nodes and edges with SQL/PGQ `GRAPH_TABLE`, and
comes in three kinds that share one namespace of names:
- A property graph holds its own rows. Define it with node and edge types, and
write it with [PropertyGraph.insert][lancedb.graph.PropertyGraph.insert].
- A virtual property graph reads tables as they are. Define it with node and
edge tables.
- A materialized virtual property graph has a virtual graph's definition, and
is read as its last refresh built it: bring it up to its tables with
[MaterializedVirtualPropertyGraph.refresh][lancedb.graph.MaterializedVirtualPropertyGraph.refresh].
Each kind has its own create, open, describe, list and drop, such as
[create_virtual_property_graph][lancedb.DBConnection.create_virtual_property_graph].
::: lancedb.graph.NodeType
@@ -227,8 +228,18 @@ either with [create_property_graph][lancedb.DBConnection.create_property_graph],
::: lancedb.graph.Endpoint
::: lancedb.graph.PropertyGraph
::: lancedb.graph.VirtualPropertyGraph
::: lancedb.graph.MaterializedVirtualPropertyGraph
::: lancedb.graph.PropertyGraphDescription
::: lancedb.graph.VirtualPropertyGraphDescription
::: lancedb.graph.MaterializedVirtualPropertyGraphDescription
## Expressions
Type-safe expression builder for filters and projections. Use these instead