cloudsearch SearchException

[x] I've gone through Developer Guide and API reference
[x] I've checked AWS Forums and StackOverflow for answers
[x] I've searched for previous similar issues and didn't find any solution
[x] This is an issue with version 2.x of the SDK

Describe the bug When searching for documents using CloudSearchDomain.search, if expression contains outcome of anther expression, SearchException is thrown.

Is the issue in the browser/Node.js? Node.js

If on Node.js, are you running this on AWS Lambda? No

Details of the browser/Node.js version Paste output of npx envinfo --browsers or node -v 12.20

SDK version number v2.1019.0

To Reproduce (observed behavior) 1) create cloudsearch domain with 2 fields

country - type literal

location - type latlon 2) run below query should throw error (doesn't require any data)

const cloudSearchDomain = new AWS.CloudSearchDomain({
endpoint:  xxx,
apiVersion: "2013-01-01",  
});
const request: SearchRequest = {
query: "country:'KR",
expr: JSON.stringify({
  "distance": `haversin(37.548493,127.056094,location.latitude,location.longitude)`, 
  "myrank": "log10(distance)"
}),
queryParser: "structured",
cursor: "initial",
return: "distance"
};  
const searchResult = await cloudSearchDomain.search(request).promise();

SearchException: undefined field: "distance"

Expected behavior No error should be thrown - Outcome of expression can be used as described in below link https://docs.aws.amazon.com/ko_kr/cloudsearch/latest/developerguide/searching-locations.html

Rest api works - myrank is calculated with distance https://xxx.ap-northeast-1.cloudsearch.amazonaws.com/2013-01-01/search?q.parser=structured&q=country:'KR'&expr.distance=haversin(38.958687,-77.343149,location.latitude,location.longitude)&expr.myrank=log10(distance)

Thanks in advance Scott

aws / aws-sdk-js

cloudsearch SearchException #3940