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Previewing Table Content

Function

This API is used to preview the first ten rows of a table.

Debugging

You can debug this API in API Explorer.

URI

  • URI format

    GET /v1.0/{project_id}/databases/{database_name}/tables/{table_name}/preview

  • Parameter description
    Table 1 URI parameters

    Parameter

    Mandatory

    Type

    Description

    project_id

    Yes

    String

    Project ID, which is used for resource isolation. For details about how to obtain its value, see Obtaining a Project ID.

    database_name

    Yes

    String

    Name of the database where the table to be previewed resides.

    table_name

    Yes

    String

    Name of the table to be previewed.
    Table 2 query parameter description

    Parameter

    Mandatory

    Type

    Description

    mode

    No

    String

    Preview table mode. The options are SYNC and ASYNC. The default value is SYNC.

    The following is an example of the URL containing the query parameter:

    GET /v1.0/{project_id}/databases/{database_name}/tables/{table_name}/preview?mode={previewMode}

Request

None

Response

Table 3 Response parameters

Parameter

Mandatory

Type

Description

is_success

No

Boolean

Whether the request is successfully executed. Value true indicates that the request is successfully executed.

message

No

String

System prompt. If execution succeeds, the parameter setting may be left blank.

schema

No

Array of objects

Column name and type of a table.

rows

No

Array of strings

Previewed table content.

Example

  • Synchronization request example: 
    NONE
  • The following is an example of a successful response in synchronous mode: 
    {
       "is_success": true,
       "message": "",
       "schema": [    
           {      
             "id": "int"
           },
           {      
             "name": "string"
           },
           {      
             "address": "string"
           }  
        ],
       "rows": [
           {
               "1",
               "John",
               "Shanghai"
           },
           {
               "2",
               "Lily",
               "Hangzhou"
           }
       ]
    }

    In asynchronous request mode, a job ID is returned. You can obtain the preview information based on the job ID.

Status Codes

Table 4 describes the status code.

Table 4 Status codes

Status Code

Description

200

The query is successful.

400

Request error.

500

Internal service error.

Error Codes

If an error occurs when this API is invoked, the system does not return the result similar to the preceding example, but returns the error code and error information. For details, see Error Code.

Parent topic: Table-related APIs