es 新增字段 并赋予默认值

es 新增字段

PUT 索引名/_mapping/doc
{
  "properties": {
    "pushTime": {
          "type": "long"
        }
  }
 }
POST 索引名/_update_by_query
{
  "script": {
    "lang": "painless",
    "source": "if (ctx._source.pushTime== null) {ctx._source.pushTime= 1332466576}"
  }
}