[pkg/ottl]: Add Double converter

[kamalmarhubi]

Component(s)

pkg/ottl

Is your feature request related to a problem? Please describe.

There's currently an Int converter, but no obvious way to force a value to be a Double. If you have an attribute that's a string representation of a double, it'd be nice to just parse it the way you currently for string representations of integers with Int.

Describe the solution you'd like

Add a Double converter that can convert Double, Int, String values.

Describe alternatives you've considered

The best I've come up with is going via JSON:

ParseJSON(Concat(["{\"value\":", attributes["some_attr"], "}"], ""))["value"]

which does in fact work for Double, Int, and String.

Additional context

No response

[github-actions]

Pinging code owners:

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

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[TylerHelmuth]

@kamalmarhubi that is an ingenious workaround.

This is definitely something we want to do. We already have FloatLikeGetter so this function is ready to be added. Would you like to work on it?

[kamalmarhubi]

@TylerHelmuth sure. Should it be called Float or Double? I thought Double made more sense because it's the name of the ValueType in pcommon, but open to either.

[TylerHelmuth]

Probably Double. @dmitryax @evan-bradley do you have an opinion?

[dmitryax]

I agree with using Double

[evan-bradley]

Double makes sense to me as well.

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

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

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

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

See Adding Labels via Comments if you do not have permissions to add labels yourself.