# Elastic Search

#### Data Source

具体来源数据库，如 `ym_elasticsearch_default` 表示默认的 ElasticSearch 集群。

#### Index

Index 名字

#### Doc Type

type 名字，目前 ElasticSearch 的版本中，Doc Type 均填写 `_doc`, 下次更新会去掉该字段。

#### Query

查询语句，用的是 ElasticSearch 支持的语法，默认查询所有记录

#### Fields

要查询的数据字段，用英文逗号分隔

#### Meta Fields

元字段，Elasticsearch 中为 `_index`, `_type`, `_id` 三个，勾选后会查询相应的字段

#### Scan Keyword Arguments

传给 helpers.scan 函数的参数， 输入一个 JSON 字符串，具体用法见[官方文档](https://bit.ly/2q3doqQ)。

#### Transform

在 Transform 中详细说明


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.reorc.com/cn-reorc-help-center/data-ingestion/lian-jie-yuan-lei-xing/elastic-search.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.