Module traits 

Per-surface capability traits.

Every extension surface that a plugin can opt into lives in its own submodule here. Plugins implement the relevant trait and register their implementation via the corresponding crate::PluginRegistrar method.

The trait surface is intentionally split: each file is small and focused on one capability. Adding a new surface means a new submodule and a new method on crate::PluginRegistrar.

Re-exports

pub use procedure::ProcedureHost;

Modules

aggregate

Cypher aggregate plugin functions.

algorithm

Graph algorithm plugins.

background

Background-job provider plugins.

catalog

Catalog / virtual-schema plugins + replacement scans.

cdc

CDC output / logical-replication plugins.

collation

Collation (sort order) plugins.

connector

Wire-protocol connector plugins.

crdt

CRDT kind plugins.

hook

Session-lifecycle hooks — Postgres-style phased.

index

Index kind plugins — custom vector, FTS, geo indexes.

locy

Locy aggregate and predicate plugins.

operator

Physical operator + optimizer-rule plugins.

procedure

Cypher procedure plugins — CALL ... YIELD ....

pushdown

Pushdown negotiation traits — Spark DSv2 / Trino-style marker traits.

scalar

Scalar plugin functions — Cypher RETURN myfn(x).

storage

Storage backend plugins — MATCH / CREATE against pluggable stores.

trigger

Fine-grained triggers — APOC apoc.trigger.* analogue.

types

Logical type plugins — Arrow extension types as a plugin surface.

window

Cypher window-function plugins.