Query Table Column Statistics with GetTableColumnStatistics API - Data Lake Formation

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.
API: The API that you can call to perform the action.
Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.
Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.
- For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.
- For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.
Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.
Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

dlf:GetTableColumnStatistics

*All Resource

*

None

Request syntax

GET /api/metastore/catalogs/databases/tables/columnstatistics HTTP/1.1

Request parameters

Parameter	Type	Required	Description	Example
CatalogId	string	No	The ID of the data catalog.	1344371
DatabaseName	string	No	The name of the database.	database_test
TableName	string	No	The name of the data table.	test_table_20201223
ColumnNames	ListString	No	A list of table columns.

Response elements

Element	Type	Description	Example
	object	The response body.
Code	string	The status code.	OK
ColumnStatisticsObjList	array	A list of column statistics.	[]
	ColumnStatisticsObj	The column statistics.
Message	string	The returned message.	.
RequestId	string	The request ID.	B7F4B621-E41E-4C84-B97F-42B5380A32BB
Success	boolean	Indicates whether the call was successful. true: The call was successful. false: The call failed.	true

code: The error code.
message: The error message.
requestId: The unique ID of the request.
Success: Indicates whether the request was successful. If the value is true, the requested data is returned in the ColumnStatisticsObjList parameter.

Examples

Success response

JSON format

{
  "Code": "OK",
  "ColumnStatisticsObjList": [
    {
      "ColumnName": "col1",
      "ColumnType": "int",
      "ColumnStatisticsData": {
        "StatisticsData": "{\"numNulls\":0,\"numTrues\":1,\"numFalses\":5}",
        "StatisticsType": "BOOLEAN_STATS"
      }
    }
  ],
  "Message": ".",
  "RequestId": "B7F4B621-E41E-4C84-B97F-42B5380A32BB",
  "Success": true
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.