graph
ontology.summary
Read the ontology with usage counts.
strata graph ontology summarydb.graphs.ontology.summary(graph: 'str', *, as_of: 'Optional[int]' = None, as_of_time: 'Optional[TimeLike]' = None) -> 'Any'wire graph_ontology_summary
Reads the graph's ontology annotated with per-type usage: a node count for each object type and an edge count for each link type. Returns no data before any type has been declared. Accepts `as_of` for time travel.
Optional reads distinguish present data from missing data. When version or timestamp facts exist on the executor output, SDK mappings should preserve them.
To see the complete help for this command, run:
strata graph ontology summary --helphelp(db.graphs.ontology.summary)
Example
Summarize the ontology's object types.
strata graph create gstrata graph ontology define-object-type g personstrata graph ontology summary g
_ = db.graphs.create("g")_ = db.graphs.ontology.define_object_type("g", "person")[o.name for o in db.graphs.ontology.summary("g").object_types]
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| graph | string | yes | Graph name. |
| as_of | integer or null | no | Read as of a position on the logical commit timeline - the `timestamp` from `history` output, not the `version`, and never a calendar date. Reads the graph state visible at that timeline position. To read as of a real time, use `as_of_time` instead. |
| as_of_time | integer or null | no | Read as of a real time: a wall-clock instant in microseconds since the Unix epoch (UTC), as reported by `committed_at` on a write ack or on any `history` row. Resolves to the commit at or before that instant, and fails rather than guessing if the instant falls outside the branch's recorded history. Mutually exclusive with `as_of`. |
| branch | string or null | no | Target branch. Defaults to the executor handle branch. |
| space | string or null | no | Target product space. Defaults to `"default"`. |
Returns
Maybe<GraphOntologySummaryData>
- dataany
- typestring
Errors
Recover by code. Retry policy and commit outcome come from the shipped error registry.
| Code | Retry | Commit outcome |
|---|---|---|
| failed_precondition.engine.runtime_closed | never | not_started |
| not_found.engine.branch | never | not_applicable |
| invalid_argument.engine.product_space | never | not_started |
| invalid_argument.engine.graph_name | never | not_started |
| not_found.engine.graph | never | not_applicable |