Google bigquery 如何向现有bigquery表添加说明？

我正在寻找一种向现有表属性添加说明的方法，是否有任何简单的命令行命令，如“alter table zzz add description…”来实现此目的？

您可以通过web UI向表及其字段添加说明-这将是最简单的方法

同样通过API，将此文档端点与PATCH（）方法结合使用：

也可以使用bq命令行工具：

bq update --description "My table" existing_dataset.existing_table

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Google有一个新的API，Google.Cloud.BigQuery.V2，可以通过NuGet获得。使用新API更新表说明的操作如下：

// instantiate a client for big query
// depending on the API version, this will be either BigqueryClient or BigQueryClient
BigqueryClient bqClient = BigqueryClient.Create(projectId, credential);

// get an instance of the tables resource using the client
TablesResource resource = new TablesResource(bqClient.Service);

// get the table definition from big query
TablesResource.GetRequest get = resource.Get(projectId, datasetId, tableId);
Table tbl = get.Execute();

// set the description property
tbl.Description = "New Description";

// save the changes to the table definition
TablesResource.PatchRequest patch = resource.Patch(tbl, projectId, datasetId, tableId);
patch.Execute();

// instantiate a client for big query
// depending on the API version, this will be either BigqueryClient or BigQueryClient
BigqueryClient bqClient = BigqueryClient.Create(projectId, credential);

// get an instance of the tables resource using the client
TablesResource resource = new TablesResource(bqClient.Service);

// get the table definition from big query
TablesResource.GetRequest get = resource.Get(projectId, datasetId, tableId);
Table tbl = get.Execute();

// set the description property
tbl.Description = "New Description";

// save the changes to the table definition
TablesResource.PatchRequest patch = resource.Patch(tbl, projectId, datasetId, tableId);
patch.Execute();