Read Data¶

Read data by providing SQL query through the specified channel.

Prerequisites¶

Read channels are created and started in the organization.

Request Format¶

POST https://{apigw-address}/data-federation/v2.0/channels/read/{channelId}

Request Parameters (Header)¶

Name	Mandatory/Optional	Data Type	Description
Content-Type	Mandatory	String	Content or file type. The default value is application/json.

Request Parameters (URI)¶

Name	Location (Path/Query)	Mandatory/Optional	Data Type	Description
orgId	Query	Mandatory	String	Your organization ID. How to get the orgId>>
channelId	Path	Mandatory	String	Channel ID

Request Parameters (Body)¶

Name	Mandatory/Optional	Data Type	Description
sqlQuery	Mandatory	String	SQL query for getting data from storage systems.
source	Optional	String	For channels with cross-source analysis disabled, specify the alias of the data source.
queue	Optional	String	Specify the priority of the data query job. Options are Hot, Warm, and Cold. The Hot queue has the highest priority, the Warm queue has the medium priority, and the Cold queue has the lowest priority.
itemFormat	Optional	String	Reserved parameter for specifying the format of returned JSON. This field is currently inactive.

Response Parameters¶

Name	Data Type	Description
data	List<Object>	Data that is returned by the SQL query. For more information, see Returned Data Struct

Returned Data Struct¶

Name	Data Type	Description
columns	String	Column name.
metadata	String	Meta data.
queryState	String	Data querying state.
rows	List<Object>	Rows of data. For more information, see Data Row Struct

Data Row Struct¶

Name	Data Type	Description
COLUMN_NAME	String	Column name.
DATA_TYPE	String	Data type.
IS_NULLABLE	String	Data type.

Sample¶

Request Sample¶

url: https://{apigw-address}/data-federation/v2.0/channels/read/{channelId}?orgId={}

method: POST

requestBody:
{
  "sqlQuery": "show schemas"
}

Return Sample¶

{
    "msg": "OK",
    "code": 0,
    "data": {
        "metadata": ["VARCHAR"],
        "columns": ["SCHEMA_NAME"],
        "queryState": "COMPLETED",
        "rows": []
    }
}

SDK Samples¶

You can access the SDK samples for data federation service on GitHub:

Java
Python