Creating a Data-level Table Comparison Task

Function

This API is used to create a data-level table comparison task.

URI

POST /v3/{project_id}/jobs/{job_id}/table/compare

**Table 1** Path parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID of a tenant in a region. For details, see Obtaining a Project ID.
job_id	Yes	String	Task ID.

Request Parameters

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
Content-Type	Yes	String	The content type. The default value is application/json.
X-Auth-Token	Yes	String	User token obtained from IAM.
X-Language	No	String	Request language type. Default value: en-us Enumerated values: en-us zh-cn

**Table 3** Request body parameters
Parameter	Mandatory	Type	Description
type	Yes	String	Comparison type. lines: row comparison. contents: value comparison. random: sampling comparison. This function is available only for tasks from GaussDB Distributed to GaussDB Distributed, GaussDB Distributed to PostgreSQL, and GaussDB Centralized to PostgreSQL.
start_time	No	String	Start time of a comparison task. The value is in timestamp format. If the value is empty, the task is started immediately.
compare_mode	No	String	Data-level comparison mode. If this parameter is left empty, object information needs to be transferred in compare_object or compare_object_with_token. quick_comparison indicates a quick comparison. Value: quick_comparison Default value: quick_comparison
compare_object	No	Array of objects	Data-level comparison object. For details, see Table 4.
options	No	Map<String,String>	Configuration item for a comparison task. The value is a key-value pair. Value comparison supports the following configuration items: Comparison method. The key is contentCompareType. The value dynamic indicates a dynamic comparison, and the value static indicates a static comparison. LOB comparison policy. The key is lobCompare. The value ignore indicates LOB data is ignored, and the value length indicates that LOB length is compared. Row comparison supports the following configuration items: Comparison policy configuration, which is applicable to many-to-one synchronization. The key is comparePolicy. The value normal indicates a one-to-one comparison, and the value manyToOne indicates a many-to-one comparison.
compare_object_with_token	No	Array of objects	Object for data-level comparison (Cassandra DR only, with token information). For details, see Table 5.
compare_task_num	No	Integer	Number of comparison task threads. This parameter is available only for tasks of cloudDataGuard-cassandra and cloudDataGuard-gausscassandra-to-gausscassandra.
compare_transformation_infos	No	Array of objects	Data filtering information. For details, see Table 7.
proportion_value	No	Double	Sampling ratio. Set this parameter when the comparison type is set to sampling comparison.

**Table 4** Data structure description of field **compare_object**
Parameter	Mandatory	Type	Description
db_name	Yes	String	Database name.
table_name	No	Array of strings	List of table names in the database.

**Table 5** Data structure description of field **compare_object_with_token**
Parameter	Mandatory	Type	Description
db_name	Yes	String	Database name.
table_name_with_token	No	Array of objects	List of tables (with tokens) in the database. For details, see Table 6.

**Table 6** Data structure description of field **table_name_with_token**
Parameter	Mandatory	Type	Description
table_name	Yes	String	Table name.
min_token	No	String	Min token of a table.
max_token	No	String	Max token of a table.

**Table 7** Data structure description of field **compare_transformation_infos**
Parameter	Mandatory	Type	Description
object_info	Yes	Array of objects	Object information. For details, see Table 8.
transformation_info	Yes	Object	Data filtering information. For details, see Table 9.

**Table 8** Data structure description of field **object_info**
Parameter	Mandatory	Type	Description
id	No	String	Database name and table name. For example, the format is t_auto_db---users, where t_auto_db is the database name and users is the table name. Database name, schema name, and table name. For example, the format is t_auto_db---schema1---users, where t_auto_db is the database name, schema1 is the schema name, and users is the table name.

**Table 9** Data structure description of field **transformation_info**
Parameter	Mandatory	Type	Description
transformation_type	Yes	String	Processing rule. The value is contentConditionalFilte.
value	Yes	String	Filtering condition. The value is an SQL condition statement, for example, id>100. The value contains a maximum of 256 characters.

Response Parameters

Status code: 202

**Table 10** Response body parameters
Parameter	Type	Description
id	String	ID of a comparison task.

Example Request

Creating a data-level sampling comparison task

https://{endpoint}/v3/054ba152d480d55b2f5dc0069e7ddef0/jobs/{job_id}/table/compare

{
  "compare_object" : [ {
    "db_name" : "t_auto_db",
    "table_name" : [ ]
  } ],
  "options" : { },
  "proportion_value" : 20.1,
  "type" : "random"
}

Creating a data-level dynamic value comparison task

https://{endpoint}/v3/054ba152d480d55b2f5dc0069e7ddef0/jobs/{job_id}/table/compare

{
  "compare_object" : [ {
    "db_name" : "t_auto_db",
    "table_name" : [ ]
  } ],
  "options" : {
    "contentCompareType" : "dynamic"
  },
  "start_time" : "1809366237000",
  "type" : "contents"
}

Creating a row comparison task with data filtering enabled

https://{endpoint}/v3/054ba152d480d55b2f5dc0069e7ddef0/jobs/{job_id}/table/compare

{
  "compare_object" : [ ],
  "compare_transformation_infos" : [ {
    "object_info" : [ {
      "id" : "t_auto_db-*-*-test-*-*-users"
    } ],
    "transformation_info" : {
      "transformationType" : "contentConditionalFilter",
      "value" : "id>100"
    }
  } ],
  "type" : "lines"
}

Example Response

Status code: 202

{
  "id" : "6a0deb4a-ce39-449b-8c49-e0eed954c155"
}

Status code: 400

Bad Request

{
  "error_code" : "DRS.M00202",
  "error_msg" : "The value of jobId is invalid."
}

Status Code

Status Code	Description
202	OK
400	Bad Request

Error Code

For details, see Error Code.

Parent topic:Public API Management

Previous topic: Querying Data-level Table Comparison Tasks

Next topic: Canceling a Comparison Task

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