Copy multiple tables

  import 
  
 ( 
  
 "context" 
  
 "fmt" 
  
 "cloud.google.com/go/bigquery" 
 ) 
 // copyMultiTable demonstrates using a copy job to copy multiple source tables into a single destination table. 
 func 
  
 copyMultiTable 
 ( 
 projectID 
 , 
  
 srcDatasetID 
  
 string 
 , 
  
 srcTableIDs 
  
 [] 
 string 
 , 
  
 dstDatasetID 
 , 
  
 dstTableID 
  
 string 
 ) 
  
 error 
  
 { 
  
 // projectID := "my-project-id" 
  
 // srcDatasetID := "sourcedataset" 
  
 // srcTableIDs := []string{"table1","table2"} 
  
 // dstDatasetID = "destinationdataset" 
  
 // dstTableID = "destinationtable" 
  
 ctx 
  
 := 
  
 context 
 . 
 Background 
 () 
  
 client 
 , 
  
 err 
  
 := 
  
 bigquery 
 . 
 NewClient 
 ( 
 ctx 
 , 
  
 projectID 
 ) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "bigquery.NewClient: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 defer 
  
 client 
 . 
 Close 
 () 
  
 srcDataset 
  
 := 
  
 client 
 . 
 Dataset 
 ( 
 srcDatasetID 
 ) 
  
 dstDataset 
  
 := 
  
 client 
 . 
 Dataset 
 ( 
 dstDatasetID 
 ) 
  
 var 
  
 tableRefs 
  
 [] 
 * 
 bigquery 
 . 
 Table 
  
 for 
  
 _ 
 , 
  
 v 
  
 := 
  
 range 
  
 srcTableIDs 
  
 { 
  
 tableRefs 
  
 = 
  
 append 
 ( 
 tableRefs 
 , 
  
 srcDataset 
 . 
 Table 
 ( 
 v 
 )) 
  
 } 
  
 copier 
  
 := 
  
 dstDataset 
 . 
 Table 
 ( 
 dstTableID 
 ). 
  CopierFrom 
 
 ( 
 tableRefs 
 ... 
 ) 
  
 copier 
 . 
 WriteDisposition 
  
 = 
  
 bigquery 
 . 
  WriteTruncate 
 
  
 job 
 , 
  
 err 
  
 := 
  
 copier 
 . 
 Run 
 ( 
 ctx 
 ) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 err 
  
 } 
  
 status 
 , 
  
 err 
  
 := 
  
 job 
 . 
 Wait 
 ( 
 ctx 
 ) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 err 
  
 } 
  
 if 
  
 err 
  
 := 
  
 status 
 . 
  Err 
 
 (); 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 err 
  
 } 
  
 return 
  
 nil 
 } 
 

  import 
  
 com.google.cloud.bigquery. BigQuery 
 
 ; 
 import 
  
 com.google.cloud.bigquery. BigQueryException 
 
 ; 
 import 
  
 com.google.cloud.bigquery. BigQueryOptions 
 
 ; 
 import 
  
 com.google.cloud.bigquery. CopyJobConfiguration 
 
 ; 
 import 
  
 com.google.cloud.bigquery. Job 
 
 ; 
 import 
  
 com.google.cloud.bigquery. JobInfo 
 
 ; 
 import 
  
 com.google.cloud.bigquery. TableId 
 
 ; 
 import 
  
 java.util.Arrays 
 ; 
 public 
  
 class 
 CopyMultipleTables 
  
 { 
  
 public 
  
 static 
  
 void 
  
 main 
 ( 
 String 
 [] 
  
 args 
 ) 
  
 { 
  
 // TODO(developer): Replace these variables before running the sample. 
  
 String 
  
 destinationDatasetName 
  
 = 
  
 "MY_DATASET_NAME" 
 ; 
  
 String 
  
 destinationTableId 
  
 = 
  
 "MY_TABLE_NAME" 
 ; 
  
 String 
  
 sourceTable1Id 
  
 = 
  
 "MY_SOURCE_TABLE_1" 
 ; 
  
 String 
  
 sourceTable2Id 
  
 = 
  
 "MY_SOURCE_TABLE_2" 
 ; 
  
 copyMultipleTables 
 ( 
 destinationDatasetName 
 , 
  
 destinationTableId 
 , 
  
 sourceTable1Id 
 , 
  
 sourceTable2Id 
 ); 
  
 } 
  
 public 
  
 static 
  
 void 
  
 copyMultipleTables 
 ( 
  
 String 
  
 destinationDatasetName 
 , 
  
 String 
  
 destinationTableId 
 , 
  
 String 
  
 sourceTable1Id 
 , 
  
 String 
  
 sourceTable2Id 
 ) 
  
 { 
  
 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 
 
  
 destinationTable 
  
 = 
  
  TableId 
 
 . 
 of 
 ( 
 destinationDatasetName 
 , 
  
 destinationTableId 
 ); 
  
  TableId 
 
  
 sourceTable1 
  
 = 
  
  TableId 
 
 . 
 of 
 ( 
 destinationDatasetName 
 , 
  
 sourceTable1Id 
 ); 
  
  TableId 
 
  
 sourceTable2 
  
 = 
  
  TableId 
 
 . 
 of 
 ( 
 destinationDatasetName 
 , 
  
 sourceTable2Id 
 ); 
  
 // For more information on CopyJobConfiguration see: 
  
 // https://googleapis.dev/java/google-cloud-clients/latest/com/google/cloud/bigquery/JobConfiguration.html 
  
  CopyJobConfiguration 
 
  
 configuration 
  
 = 
  
  CopyJobConfiguration 
 
 . 
 newBuilder 
 ( 
  
 destinationTable 
 , 
  
 Arrays 
 . 
 asList 
 ( 
 sourceTable1 
 , 
  
 sourceTable2 
 )) 
  
 . 
 build 
 (); 
  
 // For more information on Job see: 
  
 // https://googleapis.dev/java/google-cloud-clients/latest/index.html?com/google/cloud/bigquery/package-summary.html 
  
  Job 
 
  
 job 
  
 = 
  
 bigquery 
 . 
  create 
 
 ( 
 JobInfo 
 . 
 of 
 ( 
 configuration 
 )); 
  
 // Blocks until this job completes its execution, either failing or succeeding. 
  
  Job 
 
  
 completedJob 
  
 = 
  
 job 
 . 
  waitFor 
 
 (); 
  
 if 
  
 ( 
 completedJob 
  
 == 
  
 null 
 ) 
  
 { 
  
 System 
 . 
 out 
 . 
 println 
 ( 
 "Job not executed since it no longer exists." 
 ); 
  
 return 
 ; 
  
 } 
  
 else 
  
 if 
  
 ( 
 completedJob 
 . 
 getStatus 
 (). 
 getError 
 () 
  
 != 
  
 null 
 ) 
  
 { 
  
 System 
 . 
 out 
 . 
 println 
 ( 
  
 "BigQuery was unable to copy tables due to an error: \n" 
  
 + 
  
 job 
 . 
 getStatus 
 (). 
 getError 
 ()); 
  
 return 
 ; 
  
 } 
  
 System 
 . 
 out 
 . 
 println 
 ( 
 "Table copied successfully." 
 ); 
  
 } 
  
 catch 
  
 ( 
  BigQueryException 
 
  
 | 
  
 InterruptedException 
  
 e 
 ) 
  
 { 
  
 System 
 . 
 out 
 . 
 println 
 ( 
 "Table copying job was interrupted. \n" 
  
 + 
  
 e 
 . 
 toString 
 ()); 
  
 } 
  
 } 
 } 
 

  // Import the Google Cloud client library 
 const 
  
 { 
 BigQuery 
 } 
  
 = 
  
 require 
 ( 
 ' @google-cloud/bigquery 
' 
 ); 
 const 
  
 bigquery 
  
 = 
  
 new 
  
  BigQuery 
 
 (); 
 async 
  
 function 
  
 copyTableMultipleSource 
 () 
  
 { 
  
 // Copy multiple source tables to a given destination. 
  
 /** 
 * TODO(developer): Uncomment the following lines before running the sample. 
 */ 
  
 // const datasetId = "my_dataset"; 
  
 // sourceTable = 'my_table'; 
  
 // destinationTable = 'testing'; 
  
 // Create a client 
  
 const 
  
 dataset 
  
 = 
  
 bigquery 
 . 
 dataset 
 ( 
 datasetId 
 ); 
  
 const 
  
 metadata 
  
 = 
  
 { 
  
 createDisposition 
 : 
  
 'CREATE_NEVER' 
 , 
  
 writeDisposition 
 : 
  
 'WRITE_TRUNCATE' 
 , 
  
 }; 
  
 // Create table references 
  
 const 
  
 table 
  
 = 
  
 dataset 
 . 
 table 
 ( 
 sourceTable 
 ); 
  
 const 
  
 yourTable 
  
 = 
  
 dataset 
 . 
 table 
 ( 
 destinationTable 
 ); 
  
 // Copy table 
  
 const 
  
 [ 
 apiResponse 
 ] 
  
 = 
  
 await 
  
 table 
 . 
  copy 
 
 ( 
 yourTable 
 , 
  
 metadata 
 ); 
  
 console 
 . 
 log 
 ( 
 apiResponse 
 . 
 configuration 
 . 
  copy 
 
 ); 
 } 
 

  from 
  
 google.cloud 
  
 import 
  bigquery 
 
 # Construct a BigQuery client object. 
 client 
 = 
  bigquery 
 
 . 
  Client 
 
 () 
 # TODO(developer): Set dest_table_id to the ID of the destination table. 
 # dest_table_id = "your-project.your_dataset.your_table_name" 
 # TODO(developer): Set table_ids to the list of the IDs of the original tables. 
 # table_ids = ["your-project.your_dataset.your_table_name", ...] 
 job 
 = 
 client 
 . 
  copy_table 
 
 ( 
 table_ids 
 , 
 dest_table_id 
 ) 
 # Make an API request. 
  job 
 
 . 
 result 
 () 
 # Wait for the job to complete. 
 print 
 ( 
 "The tables 
 {} 
 have been appended to 
 {} 
 " 
 . 
 format 
 ( 
 table_ids 
 , 
 dest_table_id 
 ))