keep_matching_keys function not working with metric context

[Shindek77]

Component(s)

No response

Describe the issue you're reporting

Hello Community,
is keep_matching_keys ottl function doest not work for metric context as i am using it but it is not working properly. Gives error on otel as processors::transform/test: unable to parse OTTL statement "keep_matching_keys(attributes,"^(url|http|service|cloud|event).")": undefined function "keep_matching_keys" . Please help me on this

transform/test:
  metric_statements:
  - context: metric
    statements:
    - keep_matching_keys(attributes, "^(url|http|service|cloud|event).")
    - keep_matching_keys(resource.attributes, "^(url|http|service|cloud|event).*").

[github-actions]

Pinging code owners for pkg/ottl: @TylerHelmuth @kentquirk @bogdandrutu @evan-bradley. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

Pinging code owners for processor/transform: @TylerHelmuth @kentquirk @bogdandrutu @evan-bradley. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[evan-bradley]

Hi @Shindek77, which version of the Collector are you using?

[TylerHelmuth]

context: metric uses ottlmetric which doesnt provide access to attributes since metrics do not have attributes, their datapoints do.

Likely you want to use context: datapoint.