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bigquery_extract_table.go
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bigquery_extract_table.go
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// 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 job
// [START bigquery_extract_table]
import (
"context"
"fmt"
"cloud.google.com/go/bigquery"
)
// exportTableAsCompressedCSV demonstrates using an export job to
// write the contents of a table into Cloud Storage as CSV.
func exportTableAsCSV(projectID, gcsURI string) error {
// projectID := "my-project-id"
// gcsUri := "gs://mybucket/shakespeare.csv"
ctx := context.Background()
client, err := bigquery.NewClient(ctx, projectID)
if err != nil {
return fmt.Errorf("bigquery.NewClient: %v", err)
}
defer client.Close()
srcProject := "bigquery-public-data"
srcDataset := "samples"
srcTable := "shakespeare"
gcsRef := bigquery.NewGCSReference(gcsURI)
gcsRef.FieldDelimiter = ","
extractor := client.DatasetInProject(srcProject, srcDataset).Table(srcTable).ExtractorTo(gcsRef)
extractor.DisableHeader = true
// You can choose to run the job in a specific location for more complex data locality scenarios.
// Ex: In this example, source dataset and GCS bucket are in the US.
extractor.Location = "US"
job, err := extractor.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
}
// [END bigquery_extract_table]