Tracing Built-ins

Function Description OPA Wasm Swift Java

Function	Description	OPA	Wasm	Swift	Java
`trace`	`result := trace(note)` Emits `note` as a `Note` event in the query explanation. Query explanations show the exact expressions evaluated by OPA during policy execution. For example, `trace("Hello There!")` includes `Note "Hello There!"` in the query explanation. To include variables in the message, use `sprintf`. For example, `person := "Bob"; trace(sprintf("Hello There! %v", [person]))` will emit `Note "Hello There! Bob"` inside of the explanation. Arguments: `note` (string) the note to include Returns: `result` (boolean) always `true`	v0.17.0	SDK	0.0.1	✗

`trace`

result := trace(note)

Emits note as a Note event in the query explanation. Query explanations show the exact expressions evaluated by OPA during policy execution. For example, trace("Hello There!") includes Note "Hello There!" in the query explanation. To include variables in the message, use sprintf. For example, person := "Bob"; trace(sprintf("Hello There! %v", [person])) will emit Note "Hello There! Bob" inside of the explanation.

Arguments:

note (string)

the note to include

Returns:

result (boolean)

always true

v0.17.0

SDK

0.0.1

✗

See also: Debugging for notes and examples of the related print function.

trace​

`trace`