Struct parameters

  import 
  
 ( 
  
 "context" 
  
 "fmt" 
  
 "io" 
  
 "cloud.google.com/go/bigquery" 
  
 "google.golang.org/api/iterator" 
 ) 
 // queryWithStructParam demonstrates running a query and providing query parameters that include struct 
 // types. 
 func 
  
 queryWithStructParam 
 ( 
 w 
  
 io 
 . 
 Writer 
 , 
  
 projectID 
  
 string 
 ) 
  
 error 
  
 { 
  
 // projectID := "my-project-id" 
  
 ctx 
  
 := 
  
 context 
 . 
 Background 
 () 
  
 client 
 , 
  
 err 
  
 := 
  
 bigquery 
 . 
 NewClient 
 ( 
 ctx 
 , 
  
 projectID 
 ) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "bigquery.NewClient: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 defer 
  
 client 
 . 
 Close 
 () 
  
 type 
  
 MyStruct 
  
 struct 
  
 { 
  
 X 
  
 int64 
  
 Y 
  
 string 
  
 } 
  
 q 
  
 := 
  
 client 
 . 
 Query 
 ( 
  
 `SELECT @struct_value as s;` 
 ) 
  
 q 
 . 
 Parameters 
  
 = 
  
 [] 
 bigquery 
 . 
  QueryParameter 
 
 { 
  
 { 
  
 Name 
 : 
  
 "struct_value" 
 , 
  
 Value 
 : 
  
 MyStruct 
 { 
 X 
 : 
  
 1 
 , 
  
 Y 
 : 
  
 "foo" 
 }, 
  
 }, 
  
 } 
  
 // Run the query and process the returned row iterator. 
  
 it 
 , 
  
 err 
  
 := 
  
 q 
 . 
 Read 
 ( 
 ctx 
 ) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "query.Read(): %w" 
 , 
  
 err 
 ) 
  
 } 
  
 for 
  
 { 
  
 var 
  
 row 
  
 [] 
 bigquery 
 . 
  Value 
 
  
 err 
  
 := 
  
 it 
 . 
 Next 
 ( 
& row 
 ) 
  
 if 
  
 err 
  
 == 
  
 iterator 
 . 
 Done 
  
 { 
  
 break 
  
 } 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 err 
  
 } 
  
 fmt 
 . 
 Fprintln 
 ( 
 w 
 , 
  
 row 
 ) 
  
 } 
  
 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. QueryJobConfiguration 
 
 ; 
 import 
  
 com.google.cloud.bigquery. QueryParameterValue 
 
 ; 
 import 
  
 com.google.cloud.bigquery. TableResult 
 
 ; 
 import 
  
 java.util.HashMap 
 ; 
 import 
  
 java.util.Map 
 ; 
 public 
  
 class 
 QueryWithStructsParameters 
  
 { 
  
 public 
  
 static 
  
 void 
  
 main 
 ( 
 String 
 [] 
  
 args 
 ) 
  
 { 
  
 queryWithStructsParameters 
 (); 
  
 } 
  
 public 
  
 static 
  
 void 
  
 queryWithStructsParameters 
 () 
  
 { 
  
 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 
 (); 
  
 // Create struct 
  
 Map<String 
 , 
  
 QueryParameterValue 
>  
 struct 
  
 = 
  
 new 
  
 HashMap 
<> (); 
  
  struct 
 
 . 
 put 
 ( 
 "x" 
 , 
  
  QueryParameterValue 
 
 . 
  int64 
 
 ( 
 1 
 )); 
  
  struct 
 
 . 
 put 
 ( 
 "y" 
 , 
  
  QueryParameterValue 
 
 . 
  string 
 
 ( 
 "foo" 
 )); 
  
  QueryParameterValue 
 
  
 recordValue 
  
 = 
  
  QueryParameterValue 
 
 . 
  struct 
 
 ( 
 struct 
 ); 
  
 String 
  
 query 
  
 = 
  
 "SELECT STRUCT(@recordField) AS s" 
 ; 
  
  QueryJobConfiguration 
 
  
 queryConfig 
  
 = 
  
  QueryJobConfiguration 
 
 . 
 newBuilder 
 ( 
 query 
 ) 
  
 . 
  addNamedParameter 
 
 ( 
 "recordField" 
 , 
  
 recordValue 
 ) 
  
 . 
 build 
 (); 
  
  TableResult 
 
  
 results 
  
 = 
  
 bigquery 
 . 
  query 
 
 ( 
 queryConfig 
 ); 
  
 results 
  
 . 
  iterateAll 
 
 () 
  
 . 
 forEach 
 ( 
 row 
  
 - 
>  
 row 
 . 
 forEach 
 ( 
 val 
  
 - 
>  
 System 
 . 
 out 
 . 
 printf 
 ( 
 "%s" 
 , 
  
 val 
 . 
 toString 
 ()))); 
  
 System 
 . 
 out 
 . 
 println 
 ( 
 "Query with struct parameter performed successfully." 
 ); 
  
 } 
  
 catch 
  
 ( 
  BigQueryException 
 
  
 | 
  
 InterruptedException 
  
 e 
 ) 
  
 { 
  
 System 
 . 
 out 
 . 
 println 
 ( 
 "Query not performed \n" 
  
 + 
  
 e 
 . 
 toString 
 ()); 
  
 } 
  
 } 
 } 
 

  // Run a query using struct query parameters 
 // Import the Google Cloud client library 
 const 
  
 { 
 BigQuery 
 } 
  
 = 
  
 require 
 ( 
 ' @google-cloud/bigquery 
' 
 ); 
 const 
  
 bigquery 
  
 = 
  
 new 
  
  BigQuery 
 
 (); 
 async 
  
 function 
  
 queryParamsStructs 
 () 
  
 { 
  
 // The SQL query to run 
  
 const 
  
 sqlQuery 
  
 = 
  
 'SELECT @struct_value AS struct_obj;' 
 ; 
  
 const 
  
 options 
  
 = 
  
 { 
  
 query 
 : 
  
 sqlQuery 
 , 
  
 // Location must match that of the dataset(s) referenced in the query. 
  
 location 
 : 
  
 'US' 
 , 
  
 params 
 : 
  
 { 
 struct_value 
 : 
  
 { 
 x 
 : 
  
 1 
 , 
  
 y 
 : 
  
 'foo' 
 }}, 
  
 }; 
  
 // Run the query 
  
 const 
  
 [ 
 rows 
 ] 
  
 = 
  
 await 
  
 bigquery 
 . 
 query 
 ( 
 options 
 ); 
  
 console 
 . 
 log 
 ( 
 'Rows:' 
 ); 
  
 rows 
 . 
 forEach 
 ( 
 row 
  
 = 
>  
 console 
 . 
 log 
 ( 
 row 
 . 
 struct_obj 
 . 
 y 
 )); 
 } 
 

  from 
  
 google.cloud 
  
 import 
  bigquery 
 
 # Construct a BigQuery client object. 
 client 
 = 
  bigquery 
 
 . 
  Client 
 
 () 
 query 
 = 
 "SELECT @struct_value AS s;" 
 job_config 
 = 
  bigquery 
 
 . 
  QueryJobConfig 
 
 ( 
 query_parameters 
 = 
 [ 
  bigquery 
 
 . 
  StructQueryParameter 
 
 ( 
 "struct_value" 
 , 
  bigquery 
 
 . 
  ScalarQueryParameter 
 
 ( 
 "x" 
 , 
 "INT64" 
 , 
 1 
 ), 
  bigquery 
 
 . 
  ScalarQueryParameter 
 
 ( 
 "y" 
 , 
 "STRING" 
 , 
 "foo" 
 ), 
 ) 
 ] 
 ) 
 results 
 = 
 client 
 . 
  query_and_wait 
 
 ( 
 query 
 , 
 job_config 
 = 
 job_config 
 ) 
 # Make an API request and waits for results. 
 for 
 row 
 in 
 results 
 : 
 print 
 ( 
 row 
 . 
 s 
 )