Help Center/ GaussDB(DWS)/ API Reference/ API Description/ Resource Management/ Querying Cluster Schema Space Information
Updated on 2024-04-18 GMT+08:00

Querying Cluster Schema Space Information

Function

This API is used to query space information of a cluster schema.

Call Method

For details, see Calling APIs.

URI

GET /v2/{project_id}/clusters/{cluster_id}/databases/{database_name}/schemas
Table 1 URI parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID. For details about how to obtain the ID, see Obtaining Project ID.

cluster_id

Yes

String

Cluster ID. For details about how to obtain the ID, see Obtaining the Cluster ID.

database_name

Yes

String

Database name

Table 2 Query parameters

Parameter

Mandatory

Type

Description

sort_key

No

String

Sorting field

sort_dir

No

String

Sorting rule

keywords

No

String

Keyword entered for search

limit

No

Integer

Number of records to be queried

offset

No

Integer

Offset

Request Parameters

None

Response Parameters

Status code: 200

Table 3 Response body parameters

Parameter

Type

Description

schemas

Array of SchemaInfo objects

Schema information list

count

Integer

Total number of records

Table 4 SchemaInfo

Parameter

Type

Description

schema_name

String

Schema name

database_name

String

Database name

total_value

Integer

Total space used by schemas in the cluster

perm_space

Integer

Schema space threshold

skew_percent

Double

Skew ratio

min_value

Integer

Minimum value

max_value

Integer

Maximum value

min_dn

String

Minimum number of DNs

max_dn

String

Maximum number of CNs

dn_num

Integer

Number of DNs

Example Request

GET https://{Endpoint}/v2/89cd04f168b84af6be287f71730fdb4b/clusters/e59d6b86-9072-46eb-a996-13f8b44994c1/databases/gaussdb/schemas

Example Response

Status code: 200

Shema space information retrieved.

{
  "schemas" : [ {
    "schema_name" : "gs_logical_cluster",
    "database_name" : "gaussdb",
    "total_value" : 0,
    "perm_space" : -1,
    "skew_percent" : 0.0,
    "min_value" : 0,
    "max_value" : 0,
    "min_dn" : "dn_6001_6002",
    "max_dn" : "",
    "dn_num" : 3
  } ],
  "count" : 2
}

SDK Sample Code

The sample code is as follows:

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package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.dws.v2.region.DwsRegion;
import com.huaweicloud.sdk.dws.v2.*;
import com.huaweicloud.sdk.dws.v2.model.*;


public class ListSchemasSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");

        ICredential auth = new BasicCredentials()
                .withAk(ak)
                .withSk(sk);

        DwsClient client = DwsClient.newBuilder()
                .withCredential(auth)
                .withRegion(DwsRegion.valueOf("<YOUR REGION>"))
                .build();
        ListSchemasRequest request = new ListSchemasRequest();
        request.withSortKey("<sort_key>");
        request.withSortDir("<sort_dir>");
        request.withKeywords("<keywords>");
        request.withLimit(<limit>);
        request.withOffset(<offset>);
        try {
            ListSchemasResponse response = client.listSchemas(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}
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# coding: utf-8

from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkdws.v2.region.dws_region import DwsRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkdws.v2 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.getenv("CLOUD_SDK_AK")
    sk = os.getenv("CLOUD_SDK_SK")

    credentials = BasicCredentials(ak, sk) \

    client = DwsClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(DwsRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = ListSchemasRequest()
        request.sort_key = "<sort_key>"
        request.sort_dir = "<sort_dir>"
        request.keywords = "<keywords>"
        request.limit = <limit>
        request.offset = <offset>
        response = client.list_schemas(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)
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package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    dws "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        Build()

    client := dws.NewDwsClient(
        dws.DwsClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.ListSchemasRequest{}
	sortKeyRequest:= "<sort_key>"
	request.SortKey = &sortKeyRequest
	sortDirRequest:= "<sort_dir>"
	request.SortDir = &sortDirRequest
	keywordsRequest:= "<keywords>"
	request.Keywords = &keywordsRequest
	limitRequest:= int32(<limit>)
	request.Limit = &limitRequest
	offsetRequest:= int32(<offset>)
	request.Offset = &offsetRequest
	response, err := client.ListSchemas(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

For more SDK sample codes of programming languages, visit API Explorer and click the Sample Code tab. Example codes can be automatically generated.

Status Code

Status Code

Description

200

Shema space information retrieved.

400

Request error.

401

Authentication failed.

403

You do not have required permissions.

404

No resources found.

500

Internal server error.

503

Service unavailable.