Question

我为我的索引提供了JSON，如下所示：

{
"_index": "myindes",
"_type": "external",
"_id": "1",
"_source": {
   "id": "1",
   "name": "myName",
   "description": "myDescription",
   "source": "mySource",
   }
}

我想在名为_source

的topic中添加一个字符串字段

我该怎么办

Answer 1

您可以将索引映射更新为

select date_format(c.date, '%Y-%m') as yyyymm,
       count(distinct c.name) as NumCustomers,
       sum(case when date_format(c.date, '%Y-%m') <> date_format(cc.start_date, '%Y-%m')
                then 1 else 0
           end) as NumRepeatCustomers
from customers c join
     (select c.name, min(c.date) as start_date
      from customers c
      group by c.name
     ) cc
     on c.name = cc.name
group by date_format(c.date, '%Y-%m')
order by yyyymm;

虽然上述步骤不是必需的，但总是很好地控制你要编制索引的内容。

现在，您可以使用新字段索引文档，它将反映在新的更新中。但是，旧的索引文档仍然不包含此新字段。你将不得不重新索引它们。

elasticsearch - 将自定义字段添加到特定索引

1 个答案: