OTTL context inference order is incorrect for resources & scopes

[axw]

Component(s)

pkg/ottl

What happened?

Description

The OTTL context inference order appears to be incorrect, which leads to the "resource" context being incorrectly picked instead of "scope".

I'm assuming this is due to "resource" coming before "scope" in

opentelemetry-collector-contrib/pkg/ottl/context_inferrer.go

Lines 17 to 26 in b8c2f0b

	var defaultContextInferPriority = []string{
	"log",
	"datapoint",
	"metric",
	"spanevent",
	"span",
	"resource",
	"scope",
	"instrumentation_scope",
	}

Steps to Reproduce

Run this in https://ottl.run:

log_statements:
 - set(scope.name, "foo") where resource.attributes["foo"] != nil

Expected Result

Should be a no-op on the example input.

Actual Result

Results in an error:

unable to run logs statements. Error: invalid config for "transform" processor unable to parse OTTL statement "set(scope.name, "foo") where resource.attributes["foo"] != nil": error while parsing arguments for call to "set": invalid argument at position 0: context "scope" from path "scope.name" is not valid, it must be replaced by one of: "resource"

Also if you look at the execution logs, you can see that "resource" was inferred where it should have been "scope":

2025-04-04T17:29:13.206+0800 DEBUG [email protected]/context_inferrer.go:85 Inferring context from statements {"candidates": ["resource", "scope", "log"], "priority": {"datapoint":1,"instrumentation_scope":7,"log":0,"metric":2,"resource":5,"scope":6,"span":4,"spanevent":3}, "statements": ["set(scope.name, "foo") where resource.attributes["foo"] != nil"]}
2025-04-04T17:29:13.207+0800 DEBUG [email protected]/context_inferrer.go:147 Validating selected context candidate: "resource"
2025-04-04T17:29:13.207+0800 DEBUG [email protected]/context_inferrer.go:93 Inferred context: "resource"

Collector version

v0.123.0

Environment information

Environment

N/A

OpenTelemetry Collector configuration

Log output

Additional context

No response

[github-actions]

Pinging code owners:

• pkg/ottl: @TylerHelmuth @kentquirk @bogdandrutu @evan-bradley @edmocosta

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[edmocosta]

Thanks for reporting @axw, that's indeed a bug we need to fix.