Get view properties

Retrieve the properties of a view for a given view ID.

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For detailed documentation that includes this code sample, see the following:

Code sample

Go

Before trying this sample, follow theGo setup instructions in theBigQuery quickstart using client libraries. For more information, see theBigQueryGo API reference documentation.

To authenticate to BigQuery, set up Application Default Credentials. For more information, seeSet up authentication for client libraries.

import("context""fmt""io""cloud.google.com/go/bigquery")// getView demonstrates fetching the metadata from a BigQuery logical view and printing it to an io.Writer.funcgetView(wio.Writer,projectID,datasetID,viewIDstring)error{// projectID := "my-project-id"// datasetID := "mydataset"// viewID := "myview"ctx:=context.Background()client,err:=bigquery.NewClient(ctx,projectID)iferr!=nil{returnfmt.Errorf("bigquery.NewClient: %w",err)}deferclient.Close()view:=client.Dataset(datasetID).Table(viewID)meta,err:=view.Metadata(ctx)iferr!=nil{returnerr}fmt.Fprintf(w,"View %s, query: %s\n",view.FullyQualifiedName(),meta.ViewQuery)returnnil}

Java

Before trying this sample, follow theJava setup instructions in theBigQuery quickstart using client libraries. For more information, see theBigQueryJava API reference documentation.

To authenticate to BigQuery, set up Application Default Credentials. For more information, seeSet up authentication for client libraries.

importcom.google.cloud.bigquery.BigQuery;importcom.google.cloud.bigquery.BigQueryException;importcom.google.cloud.bigquery.BigQueryOptions;importcom.google.cloud.bigquery.Table;importcom.google.cloud.bigquery.TableId;// Sample to get a viewpublicclassGetView{publicstaticvoidmain(String[]args){// TODO(developer): Replace these variables before running the sample.StringdatasetName="MY_DATASET_NAME";StringviewName="MY_VIEW_NAME";getView(datasetName,viewName);}publicstaticvoidgetView(StringdatasetName,StringviewName){try{// Initialize client that will be used to send requests. This client only needs to be created// once, and can be reused for multiple requests.BigQuerybigquery=BigQueryOptions.getDefaultInstance().getService();TableIdtableId=TableId.of(datasetName,viewName);Tableview=bigquery.getTable(tableId);System.out.println("View retrieved successfully"+view.getDescription());}catch(BigQueryExceptione){System.out.println("View not retrieved. \n"+e.toString());}}}

Node.js

Before trying this sample, follow theNode.js setup instructions in theBigQuery quickstart using client libraries. For more information, see theBigQueryNode.js API reference documentation.

To authenticate to BigQuery, set up Application Default Credentials. For more information, seeSet up authentication for client libraries.

// Import the Google Cloud client libraryconst{BigQuery}=require('@google-cloud/bigquery');constbigquery=newBigQuery();asyncfunctiongetView(){// Retrieves view properties./**   * TODO(developer): Uncomment the following lines before running the sample   */// const datasetId = "my_dataset";// const tableId = "my_view";// Retrieve viewconstdataset=bigquery.dataset(datasetId);const[view]=awaitdataset.table(tableId).get();constfullTableId=view.metadata.id;constviewQuery=view.metadata.view.query;// Display view propertiesconsole.log(`View at${fullTableId}`);console.log(`View query:${viewQuery}`);}getView();

Python

Before trying this sample, follow thePython setup instructions in theBigQuery quickstart using client libraries. For more information, see theBigQueryPython API reference documentation.

To authenticate to BigQuery, set up Application Default Credentials. For more information, seeSet up authentication for client libraries.

fromgoogle.cloudimportbigqueryclient=bigquery.Client()view_id="my-project.my_dataset.my_view"# Make an API request to get the table resource.view=client.get_table(view_id)# Display view propertiesprint(f"Retrieved{view.table_type}:{str(view.reference)}")print(f"View Query:\n{view.view_query}")

What's next

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