Runtime fields emit function doesn't work in lambda or functions

[nik9000]

Runtime fields are defined by a painless script, like, say:

"corrected_voltage": {
  "type": "double",
  "script": """
    for (double v : doc['voltage'].values) {
      emit(v + .2);
   }
  """

At the moment the emit function that isn't available in lambdas or function. So you can't do this:

"corrected_voltage": {
  "type": "double",
  "script": """
    void correctVoltage(double v) {
      emit(v + .2);
    }
    for (double v : doc['voltage'].values) {
      correctVoltage(v);
   }
  """

Or this:

"corrected_voltage": {
  "type": "double",
  "script": """
    doc['voltage'].values.stream().forEach(v -> emit(v +.2));
  """

These are both unfortunate but, at the moment, not show stopper issues. At least, we don't think they are because we wrote a ton of runtime field examples before we encountered the limitation. We'd like to get t working anyway though. Folks like lambdas and method are useful.

[elasticmachine]

Pinging @elastic/es-search (Team:Search)

[elasticmachine]

Pinging @elastic/es-core-infra (Team:Core/Infra)

[stu-elastic]

This was fixed by e9800bd