forked from TrueCloudLab/restic
80 lines
2.4 KiB
Go
80 lines
2.4 KiB
Go
// Copyright 2016 Google Inc. All Rights Reserved.
|
|
//
|
|
// 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
|
|
//
|
|
// http://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 bigquery
|
|
|
|
import (
|
|
"golang.org/x/net/context"
|
|
bq "google.golang.org/api/bigquery/v2"
|
|
)
|
|
|
|
// ExtractConfig holds the configuration for an extract job.
|
|
type ExtractConfig struct {
|
|
// JobID is the ID to use for the job. If empty, a random job ID will be generated.
|
|
JobID string
|
|
|
|
// If AddJobIDSuffix is true, then a random string will be appended to JobID.
|
|
AddJobIDSuffix bool
|
|
|
|
// Src is the table from which data will be extracted.
|
|
Src *Table
|
|
|
|
// Dst is the destination into which the data will be extracted.
|
|
Dst *GCSReference
|
|
|
|
// DisableHeader disables the printing of a header row in exported data.
|
|
DisableHeader bool
|
|
}
|
|
|
|
// An Extractor extracts data from a BigQuery table into Google Cloud Storage.
|
|
type Extractor struct {
|
|
ExtractConfig
|
|
c *Client
|
|
}
|
|
|
|
// ExtractorTo returns an Extractor which can be used to extract data from a
|
|
// BigQuery table into Google Cloud Storage.
|
|
// The returned Extractor may optionally be further configured before its Run method is called.
|
|
func (t *Table) ExtractorTo(dst *GCSReference) *Extractor {
|
|
return &Extractor{
|
|
c: t.c,
|
|
ExtractConfig: ExtractConfig{
|
|
Src: t,
|
|
Dst: dst,
|
|
},
|
|
}
|
|
}
|
|
|
|
// Run initiates an extract job.
|
|
func (e *Extractor) Run(ctx context.Context) (*Job, error) {
|
|
var printHeader *bool
|
|
if e.DisableHeader {
|
|
f := false
|
|
printHeader = &f
|
|
}
|
|
job := &bq.Job{
|
|
JobReference: createJobRef(e.JobID, e.AddJobIDSuffix, e.c.projectID),
|
|
Configuration: &bq.JobConfiguration{
|
|
Extract: &bq.JobConfigurationExtract{
|
|
DestinationUris: append([]string{}, e.Dst.uris...),
|
|
Compression: string(e.Dst.Compression),
|
|
DestinationFormat: string(e.Dst.DestinationFormat),
|
|
FieldDelimiter: e.Dst.FieldDelimiter,
|
|
SourceTable: e.Src.tableRefProto(),
|
|
PrintHeader: printHeader,
|
|
},
|
|
},
|
|
}
|
|
return e.c.insertJob(ctx, &insertJobConf{job: job})
|
|
}
|