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Posted to reviews@iotdb.apache.org by GitBox <gi...@apache.org> on 2022/10/19 07:32:09 UTC
[GitHub] [iotdb] xuanronaldo commented on a diff in pull request #7637: Update IoTDB nifi process doc
xuanronaldo commented on code in PR #7637:
URL: https://github.com/apache/iotdb/pull/7637#discussion_r999043607
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docs/UserGuide/Ecosystem-Integration/NiFi-IoTDB.md:
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@@ -46,29 +46,30 @@ Apache NiFi includes the following capabilities:
* Multi-tenant authorization and policy management
* Standard protocols for encrypted communication including TLS and SSH
-## PutIoTDB
+## PutIoTDBRecord
This is a processor that reads the content of the incoming FlowFile as individual records using the configured 'Record Reader' and writes them to Apache IoTDB using native interface.
-### Properties of PutIoTDB
+### Properties of PutIoTDBRecord
-| property | description | default value | necessary |
-| ------------- | ------------------------------------------------------------ | ------------- | --------- |
-| Host | The host of IoTDB. | null | true |
-| Port | The port of IoTDB. | 6667 | true |
-| Username | Username to access the IoTDB. | null | true |
-| Password | Password to access the IoTDB. | null | true |
-| Record Reader | Specifies the type of Record Reader controller service to use <br />for parsing the incoming data and determining the schema. | null | true |
+| property | description | default value | necessary |
+|---------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| ------------- | --------- |
+| Host | The host of IoTDB. | null | true |
+| Port | The port of IoTDB. | 6667 | true |
+| Username | Username to access the IoTDB. | null | true |
+| Password | Password to access the IoTDB. | null | true |
+| Prefix | The Prefix begin with root. that will be add to the tsName in data. <br /> It can be updated by expression language. | null | true |
+| Record Reader | Specifies the type of Record Reader controller service to use <br />for parsing the incoming data and determining the schema. | null | true |
| Schema | The schema that IoTDB needs doesn't support good by NiFi.<br/>Therefore, you can define the schema here. <br />Besides, you can set encoding type and compression type by this method.<br />If you don't set this property, the inferred schema will be used.<br /> It can be updated by expression language. | null | false |
-| Aligned | Whether using aligned interface? It can be updated by expression language. | false | false |
-| MaxRowNumber | Specifies the max row number of each tablet. It can be updated by expression language. | 1024 | false |
+| Aligned | Whether using aligned interface? It can be updated by expression language. | false | false |
+| MaxRowNumber | Specifies the max row number of each tablet. It can be updated by expression language. | 1024 | false |
### Inferred Schema of Flowfile
There are a couple of rules about flowfile:
1. The flowfile can be read by `Record Reader`.
-2. The schema of flowfile must contains a field `Time`, and it must be the first.
+2. The schema of flowfile must contain a field `Time`, and it must be the first.
3. The data type of time must be `STRING` or `LONG`.
4. Fields excepted time must start with `root.`.
Review Comment:
It seems like that the fields do not need to start with `root.`, if the `prefix` property is assigned. Besides, the relationship between `tsName` and field name is not clarified.
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