如何列出Google Big Query中所有数据集中所有表的大小

问题描述 投票:0回答:2

我正在试图找出如何列出Google Big Query中所有项目中所有表格的所有大小。也许它将是多个表的SQL联盟。虽然,我在这里看很多表,所以我想要一些自动化解决方案。我可以使用R代码来执行此任务。或者我甚至冷使用Python来做到这一点。如果此处的任何人都有解决方案来列出一些指标,主要是每个对象(表格)的大小,以及其他相关指标,请在此处分享。非常感谢!

python sql r python-3.x google-bigquery
2个回答
0
投票

Python中的这个示例列出了所有项目中的所有表及其大小(以字节为单位)。您可以将其作为示例来构建适合您的用例的脚本:

from google.cloud import bigquery
from google.cloud.bigquery import Dataset
from googleapiclient import discovery
from oauth2client.client import GoogleCredentials

# credentials to list project
credentials = GoogleCredentials.get_application_default()
service = discovery.build('cloudresourcemanager', 'v1', credentials=credentials)

# list project
request = service.projects().list()
response = request.execute()

# Main loop for project
for project in response.get('projects', []):
    client = bigquery.Client(project['projectId']) # Start the client in the right project

    # list dataset
    datasets = list(client.list_datasets())
    if datasets: # If there is some BQ dataset
        print('Datasets in project {}:'.format(project['name']))
        # Second loop to list the tables in the dataset
        for dataset in datasets: 
            print(' - {}'.format(dataset.dataset_id))
            get_size = client.query("select table_id, size_bytes as size from "+dataset.dataset_id+".__TABLES__") # This query retrieve all the tables in the dataset and the size in bytes. It can be modified to get more fields.
            tables = get_size.result() # Get the result
            # Third loop to list the tables and print the result
            for table in tables:
                print('\t{} size: {}'.format(table.table_id,table.size))

参考:

列出项目: https://cloud.google.com/resource-manager/reference/rest/v1/projects/list#embedded-explorer

要列出数据集: https://cloud.google.com/bigquery/docs/datasets#bigquery-list-datasets-python


0
投票

选项1

截至今天的当前选项是使用Google API获取项目/数据集/表信息并将其存储在本地表中。既然你提到你有很多数据集和表,我建议你使用无服务器方法来实现流程的可扩展性和速度

List Project

List dataset

List Table

选项2

BigQuery现在提供他们的Beta program access to information schema,检查它可能会节省您的时间和精力

select * from `DATASET.INFORMATION_SCHEMA.TABLES`

要么

select * from `DATASET.INFORMATION_SCHEMA.COLUMNS`

enter image description here

选项3。

您可以查询__TABLES__以获取表信息

select * from `project.__TABLES__`

enter image description here

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