Hello all. Can't seem to make stream_maps work. I am using tap-mysql, target-clickhouse. They are working when I test using the tap-carbon-intensity extractor . when used with tap-mysql, the transform never works. any help will be appreciated.

version: 1
default_environment: dev
project_id: 595774ac-c2ed-49da-ab22-3df6083e7681

environments:
- name: dev
- name: staging
- name: prod

plugins:
  extractors:
  - name: tap-mysql
    variant: transferwise
    pip_url: pipelinewise-tap-mysql
    select:
    - test_schema-job_adverts_2.*
    metadata:
      test_schema-job_adverts_2:
        replication-method: LOG_BASED
    config:
      stream_maps:
        job_adverts_2:
          employer_name: md5(employer_name)

  - name: tap-carbon-intensity
    variant: meltano
    pip_url: git+<https://gitlab.com/meltano/tap-carbon-intensity.git>
    config:
      stream_maps:
        entry: #from
          index: md5(index)
        generationmix: # fuel
          fuel: __NULL__
        region: #dnoregion
          dnoregion: __NULL__

  loaders:
  - name: target-clickhouse
    variant: shaped-ai
    pip_url: git+<https://github.com/shaped-ai/target-clickhouse.git>
    config:
      stream_maps:
        job_adverts_2:
          employer_name: hash(employer_name)