blog_es_pipeline_1_functional_pipeline_a

PUT _ingest/pipeline/func_add_last_update_time
{
  "version": 1, 
  "description": "any stage: add back last update timestamp using script approach",
  "processors": [
    {
      "script": {
        "lang": "painless",
        "source": """
        ctx.last_update_time = new Date();
        """
      }
    }
  ]
}