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bigquery_load_table_gcs_csv_truncate.go
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/
bigquery_load_table_gcs_csv_truncate.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 loadingdata
// [START bigquery_load_table_gcs_csv_truncate]
import (
"context"
"fmt"
"cloud.google.com/go/bigquery"
)
// importCSVTruncate demonstrates loading data from CSV data in Cloud Storage and overwriting/truncating
// data in the existing table.
func importCSVTruncate(projectID, datasetID, tableID string) error {
// projectID := "my-project-id"
// datasetID := "mydataset"
// tableID := "mytable"
ctx := context.Background()
client, err := bigquery.NewClient(ctx, projectID)
if err != nil {
return fmt.Errorf("bigquery.NewClient: %v", err)
}
defer client.Close()
gcsRef := bigquery.NewGCSReference("gs://cloud-samples-data/bigquery/us-states/us-states.csv")
gcsRef.SourceFormat = bigquery.CSV
gcsRef.AutoDetect = true
gcsRef.SkipLeadingRows = 1
loader := client.Dataset(datasetID).Table(tableID).LoaderFrom(gcsRef)
loader.WriteDisposition = bigquery.WriteTruncate
job, err := loader.Run(ctx)
if err != nil {
return err
}
status, err := job.Wait(ctx)
if err != nil {
return err
}
if status.Err() != nil {
return fmt.Errorf("job completed with error: %v", status.Err())
}
return nil
}
// [END bigquery_load_table_gcs_csv_truncate]