/
bigquery_query.go
70 lines (64 loc) · 1.72 KB
/
bigquery_query.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package querying
// [START bigquery_query]
import (
"context"
"fmt"
"io"
"cloud.google.com/go/bigquery"
"google.golang.org/api/iterator"
)
// queryBasic demonstrates issuing a query and reading results.
func queryBasic(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: %v", err)
}
defer client.Close()
q := client.Query(
"SELECT name FROM `bigquery-public-data.usa_names.usa_1910_2013` " +
"WHERE state = \"TX\" " +
"LIMIT 100")
// Location must match that of the dataset(s) referenced in the query.
q.Location = "US"
// Run the query and print results when the query job is completed.
job, err := q.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
}
it, err := job.Read(ctx)
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
}
// [END bigquery_query]