Help Center/ Data Lake Insight/ API Reference/ SQL Job-related APIs/ Exporting Query Results
Updated on 2024-05-31 GMT+08:00
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Exporting Query Results

Function

This API is used to export results returned from the query using SQL statements to OBS. Only the query result of QUERY jobs can be exported.

  • This API is asynchronous.
  • Currently, data can be exported only to OBS, and the OBS path must be specified to the folder level. The OBS path cannot contain commas (,). The OBS bucket name cannot end with the regular expression format ".[0-9]+(.*)". Specifically, if the bucket name contains dots (.), the last dot (.) cannot be followed by a digit, for example, "**.12abc" and "**.12".

URI

  • URI format

    POST /v1.0/{project_id}/jobs/{job_id}/export-result

  • 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.

    job_id

    Yes

    String

    Job ID.

Request

Table 2 Request parameters

Parameter

Mandatory

Type

Description

data_path

Yes

String

Path for storing the exported data. Currently, data can be stored only on OBS. The OBS path cannot contain folders, for example, the path folder in the sample request.

compress

No

String

Compression format of exported data. Currently, gzip, bzip2, and deflate are supported. The default value is none, indicating that data is not compressed.

data_type

Yes

String

Storage format of exported data. Currently, only CSV and JSON are supported.

queue_name

No

String

Name of the queue that is specified to execute a task. If no queue is specified, the default queue is used.

export_mode

No

String

Export mode. The parameter value can be ErrorIfExists or Overwrite. If export_mode is not specified, this parameter is set to ErrorIfExists by default.

  • ErrorIfExists: Ensure that the specified export directory does not exist. If the specified export directory exists, an error is reported and the export operation cannot be performed.
  • Overwrite: If you add new files to a specific directory, existing files will be deleted.

with_column_header

No

Boolean

Whether to export column names when exporting CSV and JSON data.

  • If this parameter is set to true, the column names are exported.
  • If this parameter is set to false, the column names are not exported.
  • If this parameter is left blank, the default value false is used.

limit_num

No

Integer

Number of data records to be exported. The default value is 0, indicating that all data records are exported.

encoding_type

No

String

Encoding format of the data to be exported. The default value is utf-8.

The options include:

  • utf-8
  • gb2312
  • gbk

quote_char

No

String

User-defined quote character.

The default value is double quotes (").

This parameter is available and can be set only when Data Format is csv.

Quotation characters are used to identify the beginning and end of text fields when exporting job results, and are used to separate fields.

Only one character can be set.

This is mainly used to handle data that contains spaces, special characters, or characters that are the same as the delimiter.

escape_char

No

String

User-defined escape character.

The default value is a backslash (\).

This parameter is available and can be set only when Data Format is csv.

If special characters, such as quotation marks, need to be included in the exported results, they can be represented using escape characters (backslash \).

Only one character can be set.

Common scenarios for using escape characters are:

  • If there is a third quotation mark between two quotation marks, add an escape character before the third quotation mark to avoid the field content being split.
  • If there is already an escape character in the data content, add another escape character before the existing one to avoid the original character being used as an escape character.

Response

Table 3 Response parameters

Parameter

Mandatory

Type

Description

is_success

Yes

Boolean

Indicates whether the request is successfully sent. Value true indicates that the request is successfully sent.

message

Yes

String

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

job_id

No

String

ID of a job returned after a job is generated and submitted by using SQL statements. The job ID can be used to query the job status and results.

job_mode

No

String

Job execution mode. The options are as follows:

  • async: asynchronous
  • sync: synchronous

Example Request

Export query results of SQL statements to OBS and stores the results in JSON format.

{
  "data_path": "obs://obs-bucket1/path",
  "data_type": "json",
  "compress": "gzip",
  "with_column_header": "true",
  "queue_name": "queue2",
  "limit_num": 10
}

Example Response

{
  "is_success": true,
  "message": "",
  "job_id": "37a40ef9-86f5-42e6-b4c6-8febec89cc20",
  "job_mode":"async"
}

Status Codes

Table 4 describes the status code.

Table 4 Status codes

Status Code

Description

200

Export 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 Codes.

Parent topic: SQL Job-related APIs