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Merge pull request #1740 from iuhoay/patch-1

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dingxiaobo 2023-04-14 09:53:53 +08:00 committed by GitHub
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hdfsreader/doc/hdfsreader.md
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@ -166,20 +166,20 @@ HdfsReader实现了从Hadoop分布式文件系统Hdfs中读取文件数据并转
默认情况下，用户可以全部按照String类型读取数据，配置如下： 默认情况下，用户可以全部按照String类型读取数据，配置如下：
```json ```json
"column": ["*"] "column": ["*"]
``` ```
用户可以指定Column字段信息，配置如下： 用户可以指定Column字段信息，配置如下：
```json ```json
{ {
"type": "long", "type": "long",
"index": 0 //从本地文件文本第一列获取int字段 "index": 0 //从本地文件文本第一列获取int字段
}, },
{ {
"type": "string", "type": "string",
"value": "alibaba" //HdfsReader内部生成alibaba的字符串字段作为当前字段 "value": "alibaba" //HdfsReader内部生成alibaba的字符串字段作为当前字段
} }
``` ```
对于用户指定Column信息，type必须填写，index/value必须选择其一。 对于用户指定Column信息，type必须填写，index/value必须选择其一。