Delete materialized view

Delete a materialized view.

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

Manage materialized views

Code sample

Go

Before trying this sample, follow the Go setup instructions in the BigQuery quickstart using client libraries . For more information, see the BigQuery Go API reference documentation .

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

  import 
  
 ( 
  
 "context" 
  
 "fmt" 
  
 "cloud.google.com/go/bigquery" 
 ) 
 // deleteMaterializedView demonstrates deletion of a BigQuery materialized view. 
 func 
  
 deleteMaterializedView 
 ( 
 projectID 
 , 
  
 datasetID 
 , 
  
 viewID 
  
 string 
 ) 
  
 error 
  
 { 
  
 // projectID := "my-project-id" 
  
 // datasetID := "mydataset" 
  
 // tableID := "myview" 
  
 ctx 
  
 := 
  
 context 
 . 
 Background 
 () 
  
 client 
 , 
  
 err 
  
 := 
  
 bigquery 
 . 
 NewClient 
 ( 
 ctx 
 , 
  
 projectID 
 ) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "bigquery.NewClient: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 defer 
  
 client 
 . 
 Close 
 () 
  
 view 
  
 := 
  
 client 
 . 
 Dataset 
 ( 
 datasetID 
 ). 
 Table 
 ( 
 viewID 
 ) 
  
 if 
  
 err 
  
 := 
  
 view 
 . 
 Delete 
 ( 
 ctx 
 ); 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 err 
  
 } 
  
 return 
  
 nil 
 }

Java

Before trying this sample, follow the Java setup instructions in the BigQuery quickstart using client libraries . For more information, see the BigQuery Java API reference documentation .

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

  import 
  
 com.google.cloud.bigquery. BigQuery 
 
 ; 
 import 
  
 com.google.cloud.bigquery. BigQueryException 
 
 ; 
 import 
  
 com.google.cloud.bigquery. BigQueryOptions 
 
 ; 
 import 
  
 com.google.cloud.bigquery. TableId 
 
 ; 
 // Sample to delete materialized view 
 public 
  
 class 
 DeleteMaterializedView 
  
 { 
  
 public 
  
 static 
  
 void 
  
 main 
 ( 
 String 
 [] 
  
 args 
 ) 
  
 { 
  
 // TODO(developer): Replace these variables before running the sample. 
  
 String 
  
 datasetName 
  
 = 
  
 "MY_DATASET_NAME" 
 ; 
  
 String 
  
 materializedViewName 
  
 = 
  
 "MY_MATERIALIZED_VIEW_NAME" 
 ; 
  
 deleteMaterializedView 
 ( 
 datasetName 
 , 
  
 materializedViewName 
 ); 
  
 } 
  
 public 
  
 static 
  
 void 
  
 deleteMaterializedView 
 ( 
 String 
  
 datasetName 
 , 
  
 String 
  
 materializedViewName 
 ) 
  
 { 
  
 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. 
  
  BigQuery 
 
  
 bigquery 
  
 = 
  
  BigQueryOptions 
 
 . 
 getDefaultInstance 
 (). 
 getService 
 (); 
  
  TableId 
 
  
 tableId 
  
 = 
  
  TableId 
 
 . 
 of 
 ( 
 datasetName 
 , 
  
 materializedViewName 
 ); 
  
 boolean 
  
 success 
  
 = 
  
 bigquery 
 . 
  delete 
 
 ( 
 tableId 
 ); 
  
 if 
  
 ( 
 success 
 ) 
  
 { 
  
 System 
 . 
 out 
 . 
 println 
 ( 
 "Materialized view deleted successfully" 
 ); 
  
 } 
  
 else 
  
 { 
  
 System 
 . 
 out 
 . 
 println 
 ( 
 "Materialized view was not found" 
 ); 
  
 } 
  
 } 
  
 catch 
  
 ( 
  BigQueryException 
 
  
 e 
 ) 
  
 { 
  
 System 
 . 
 out 
 . 
 println 
 ( 
 "Materialized view was not found. \n" 
  
 + 
  
 e 
 . 
 toString 
 ()); 
  
 } 
  
 } 
 }

Python

Before trying this sample, follow the Python setup instructions in the BigQuery quickstart using client libraries . For more information, see the BigQuery Python API reference documentation .

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

  from 
  
 google.cloud 
  
 import 
  bigquery 
 
 bigquery_client 
 = 
  bigquery 
 
 . 
  Client 
 
 () 
 view_id 
 = 
 "my-project.my_dataset.my_materialized_view" 
 # Make an API request to delete the materialized view. 
 bigquery_client 
 . 
  delete_table 
 
 ( 
 view_id 
 )

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Code sample

Go

Java

Python

What's next

Delete materialized view