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759 lines
22 KiB
Go
759 lines
22 KiB
Go
// Copyright 2015 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package bigquery
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import (
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"fmt"
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"io"
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"net/http"
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"sync"
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"time"
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"cloud.google.com/go/internal"
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"cloud.google.com/go/internal/version"
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gax "github.com/googleapis/gax-go"
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"golang.org/x/net/context"
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bq "google.golang.org/api/bigquery/v2"
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"google.golang.org/api/googleapi"
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)
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// service provides an internal abstraction to isolate the generated
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// BigQuery API; most of this package uses this interface instead.
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// The single implementation, *bigqueryService, contains all the knowledge
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// of the generated BigQuery API.
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type service interface {
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// Jobs
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insertJob(ctx context.Context, projectId string, conf *insertJobConf) (*Job, error)
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getJob(ctx context.Context, projectId, jobID string) (*Job, error)
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jobCancel(ctx context.Context, projectId, jobID string) error
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jobStatus(ctx context.Context, projectId, jobID string) (*JobStatus, error)
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// Tables
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createTable(ctx context.Context, conf *createTableConf) error
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getTableMetadata(ctx context.Context, projectID, datasetID, tableID string) (*TableMetadata, error)
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deleteTable(ctx context.Context, projectID, datasetID, tableID string) error
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// listTables returns a page of Tables and a next page token. Note: the Tables do not have their c field populated.
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listTables(ctx context.Context, projectID, datasetID string, pageSize int, pageToken string) ([]*Table, string, error)
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patchTable(ctx context.Context, projectID, datasetID, tableID string, conf *patchTableConf) (*TableMetadata, error)
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// Table data
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readTabledata(ctx context.Context, conf *readTableConf, pageToken string) (*readDataResult, error)
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insertRows(ctx context.Context, projectID, datasetID, tableID string, rows []*insertionRow, conf *insertRowsConf) error
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// Datasets
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insertDataset(ctx context.Context, datasetID, projectID string) error
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deleteDataset(ctx context.Context, datasetID, projectID string) error
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getDatasetMetadata(ctx context.Context, projectID, datasetID string) (*DatasetMetadata, error)
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// Misc
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// Waits for a query to complete.
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waitForQuery(ctx context.Context, projectID, jobID string) (Schema, error)
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// listDatasets returns a page of Datasets and a next page token. Note: the Datasets do not have their c field populated.
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listDatasets(ctx context.Context, projectID string, maxResults int, pageToken string, all bool, filter string) ([]*Dataset, string, error)
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}
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var xGoogHeader = fmt.Sprintf("gl-go/%s gccl/%s", version.Go(), version.Repo)
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func setClientHeader(headers http.Header) {
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headers.Set("x-goog-api-client", xGoogHeader)
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}
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type bigqueryService struct {
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s *bq.Service
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}
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func newBigqueryService(client *http.Client, endpoint string) (*bigqueryService, error) {
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s, err := bq.New(client)
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if err != nil {
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return nil, fmt.Errorf("constructing bigquery client: %v", err)
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}
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s.BasePath = endpoint
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return &bigqueryService{s: s}, nil
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}
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// getPages calls the supplied getPage function repeatedly until there are no pages left to get.
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// token is the token of the initial page to start from. Use an empty string to start from the beginning.
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func getPages(token string, getPage func(token string) (nextToken string, err error)) error {
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for {
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var err error
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token, err = getPage(token)
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if err != nil {
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return err
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}
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if token == "" {
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return nil
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}
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}
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}
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type insertJobConf struct {
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job *bq.Job
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media io.Reader
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}
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// Calls the Jobs.Insert RPC and returns a Job. Callers must set the returned Job's
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// client.
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func (s *bigqueryService) insertJob(ctx context.Context, projectID string, conf *insertJobConf) (*Job, error) {
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call := s.s.Jobs.Insert(projectID, conf.job).Context(ctx)
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setClientHeader(call.Header())
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if conf.media != nil {
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call.Media(conf.media)
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}
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var res *bq.Job
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var err error
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invoke := func() error {
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res, err = call.Do()
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return err
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}
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// A job with a client-generated ID can be retried; the presence of the
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// ID makes the insert operation idempotent.
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// We don't retry if there is media, because it is an io.Reader. We'd
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// have to read the contents and keep it in memory, and that could be expensive.
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// TODO(jba): Look into retrying if media != nil.
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if conf.job.JobReference != nil && conf.media == nil {
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err = runWithRetry(ctx, invoke)
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} else {
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err = invoke()
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}
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if err != nil {
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return nil, err
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}
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var dt *bq.TableReference
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if qc := res.Configuration.Query; qc != nil {
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dt = qc.DestinationTable
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}
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return &Job{
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projectID: projectID,
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jobID: res.JobReference.JobId,
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destinationTable: dt,
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}, nil
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}
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type pagingConf struct {
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recordsPerRequest int64
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setRecordsPerRequest bool
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startIndex uint64
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}
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type readTableConf struct {
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projectID, datasetID, tableID string
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paging pagingConf
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schema Schema // lazily initialized when the first page of data is fetched.
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}
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func (conf *readTableConf) fetch(ctx context.Context, s service, token string) (*readDataResult, error) {
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return s.readTabledata(ctx, conf, token)
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}
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func (conf *readTableConf) setPaging(pc *pagingConf) { conf.paging = *pc }
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type readDataResult struct {
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pageToken string
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rows [][]Value
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totalRows uint64
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schema Schema
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}
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func (s *bigqueryService) readTabledata(ctx context.Context, conf *readTableConf, pageToken string) (*readDataResult, error) {
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// Prepare request to fetch one page of table data.
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req := s.s.Tabledata.List(conf.projectID, conf.datasetID, conf.tableID)
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setClientHeader(req.Header())
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if pageToken != "" {
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req.PageToken(pageToken)
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} else {
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req.StartIndex(conf.paging.startIndex)
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}
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if conf.paging.setRecordsPerRequest {
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req.MaxResults(conf.paging.recordsPerRequest)
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}
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// Fetch the table schema in the background, if necessary.
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var schemaErr error
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var schemaFetch sync.WaitGroup
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if conf.schema == nil {
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schemaFetch.Add(1)
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go func() {
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defer schemaFetch.Done()
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var t *bq.Table
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t, schemaErr = s.s.Tables.Get(conf.projectID, conf.datasetID, conf.tableID).
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Fields("schema").
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Context(ctx).
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Do()
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if schemaErr == nil && t.Schema != nil {
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conf.schema = convertTableSchema(t.Schema)
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}
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}()
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}
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res, err := req.Context(ctx).Do()
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if err != nil {
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return nil, err
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}
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schemaFetch.Wait()
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if schemaErr != nil {
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return nil, schemaErr
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}
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result := &readDataResult{
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pageToken: res.PageToken,
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totalRows: uint64(res.TotalRows),
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schema: conf.schema,
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}
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result.rows, err = convertRows(res.Rows, conf.schema)
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if err != nil {
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return nil, err
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}
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return result, nil
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}
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func (s *bigqueryService) waitForQuery(ctx context.Context, projectID, jobID string) (Schema, error) {
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// Use GetQueryResults only to wait for completion, not to read results.
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req := s.s.Jobs.GetQueryResults(projectID, jobID).Context(ctx).MaxResults(0)
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setClientHeader(req.Header())
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backoff := gax.Backoff{
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Initial: 1 * time.Second,
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Multiplier: 2,
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Max: 60 * time.Second,
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}
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var res *bq.GetQueryResultsResponse
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err := internal.Retry(ctx, backoff, func() (stop bool, err error) {
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res, err = req.Do()
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if err != nil {
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return !retryableError(err), err
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}
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if !res.JobComplete { // GetQueryResults may return early without error; retry.
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return false, nil
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}
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return true, nil
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})
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if err != nil {
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return nil, err
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}
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return convertTableSchema(res.Schema), nil
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}
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type insertRowsConf struct {
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templateSuffix string
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ignoreUnknownValues bool
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skipInvalidRows bool
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}
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func (s *bigqueryService) insertRows(ctx context.Context, projectID, datasetID, tableID string, rows []*insertionRow, conf *insertRowsConf) error {
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req := &bq.TableDataInsertAllRequest{
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TemplateSuffix: conf.templateSuffix,
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IgnoreUnknownValues: conf.ignoreUnknownValues,
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SkipInvalidRows: conf.skipInvalidRows,
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}
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for _, row := range rows {
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m := make(map[string]bq.JsonValue)
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for k, v := range row.Row {
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m[k] = bq.JsonValue(v)
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}
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req.Rows = append(req.Rows, &bq.TableDataInsertAllRequestRows{
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InsertId: row.InsertID,
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Json: m,
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})
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}
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call := s.s.Tabledata.InsertAll(projectID, datasetID, tableID, req).Context(ctx)
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setClientHeader(call.Header())
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var res *bq.TableDataInsertAllResponse
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err := runWithRetry(ctx, func() (err error) {
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res, err = call.Do()
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return err
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})
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if err != nil {
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return err
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}
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if len(res.InsertErrors) == 0 {
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return nil
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}
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var errs PutMultiError
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for _, e := range res.InsertErrors {
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if int(e.Index) > len(rows) {
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return fmt.Errorf("internal error: unexpected row index: %v", e.Index)
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}
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rie := RowInsertionError{
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InsertID: rows[e.Index].InsertID,
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RowIndex: int(e.Index),
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}
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for _, errp := range e.Errors {
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rie.Errors = append(rie.Errors, errorFromErrorProto(errp))
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}
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errs = append(errs, rie)
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}
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return errs
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}
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func (s *bigqueryService) getJob(ctx context.Context, projectID, jobID string) (*Job, error) {
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job, err := s.getJobInternal(ctx, projectID, jobID, "configuration")
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if err != nil {
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return nil, err
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}
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var isQuery bool
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var dest *bq.TableReference
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if job.Configuration.Query != nil {
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isQuery = true
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dest = job.Configuration.Query.DestinationTable
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}
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return &Job{
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projectID: projectID,
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jobID: jobID,
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isQuery: isQuery,
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destinationTable: dest,
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}, nil
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}
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func (s *bigqueryService) jobStatus(ctx context.Context, projectID, jobID string) (*JobStatus, error) {
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job, err := s.getJobInternal(ctx, projectID, jobID, "status", "statistics")
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if err != nil {
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return nil, err
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}
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st, err := jobStatusFromProto(job.Status)
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if err != nil {
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return nil, err
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}
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st.Statistics = jobStatisticsFromProto(job.Statistics)
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return st, nil
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}
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func (s *bigqueryService) getJobInternal(ctx context.Context, projectID, jobID string, fields ...googleapi.Field) (*bq.Job, error) {
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var job *bq.Job
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err := runWithRetry(ctx, func() (err error) {
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job, err = s.s.Jobs.Get(projectID, jobID).
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Fields(fields...).
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Context(ctx).
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Do()
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return err
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})
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if err != nil {
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return nil, err
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}
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return job, nil
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}
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func (s *bigqueryService) jobCancel(ctx context.Context, projectID, jobID string) error {
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// Jobs.Cancel returns a job entity, but the only relevant piece of
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// data it may contain (the status of the job) is unreliable. From the
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// docs: "This call will return immediately, and the client will need
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// to poll for the job status to see if the cancel completed
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// successfully". So it would be misleading to return a status.
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return runWithRetry(ctx, func() error {
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_, err := s.s.Jobs.Cancel(projectID, jobID).
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Fields(). // We don't need any of the response data.
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Context(ctx).
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Do()
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return err
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})
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}
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var stateMap = map[string]State{"PENDING": Pending, "RUNNING": Running, "DONE": Done}
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func jobStatusFromProto(status *bq.JobStatus) (*JobStatus, error) {
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state, ok := stateMap[status.State]
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if !ok {
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return nil, fmt.Errorf("unexpected job state: %v", status.State)
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}
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newStatus := &JobStatus{
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State: state,
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err: nil,
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}
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if err := errorFromErrorProto(status.ErrorResult); state == Done && err != nil {
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newStatus.err = err
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}
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for _, ep := range status.Errors {
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newStatus.Errors = append(newStatus.Errors, errorFromErrorProto(ep))
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}
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return newStatus, nil
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}
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func jobStatisticsFromProto(s *bq.JobStatistics) *JobStatistics {
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js := &JobStatistics{
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CreationTime: unixMillisToTime(s.CreationTime),
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StartTime: unixMillisToTime(s.StartTime),
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EndTime: unixMillisToTime(s.EndTime),
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TotalBytesProcessed: s.TotalBytesProcessed,
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}
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switch {
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case s.Extract != nil:
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js.Details = &ExtractStatistics{
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DestinationURIFileCounts: []int64(s.Extract.DestinationUriFileCounts),
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}
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case s.Load != nil:
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js.Details = &LoadStatistics{
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InputFileBytes: s.Load.InputFileBytes,
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InputFiles: s.Load.InputFiles,
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OutputBytes: s.Load.OutputBytes,
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OutputRows: s.Load.OutputRows,
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}
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case s.Query != nil:
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var names []string
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for _, qp := range s.Query.UndeclaredQueryParameters {
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names = append(names, qp.Name)
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}
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var tables []*Table
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for _, tr := range s.Query.ReferencedTables {
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tables = append(tables, convertTableReference(tr))
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}
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js.Details = &QueryStatistics{
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BillingTier: s.Query.BillingTier,
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CacheHit: s.Query.CacheHit,
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StatementType: s.Query.StatementType,
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TotalBytesBilled: s.Query.TotalBytesBilled,
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TotalBytesProcessed: s.Query.TotalBytesProcessed,
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NumDMLAffectedRows: s.Query.NumDmlAffectedRows,
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QueryPlan: queryPlanFromProto(s.Query.QueryPlan),
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Schema: convertTableSchema(s.Query.Schema),
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ReferencedTables: tables,
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UndeclaredQueryParameterNames: names,
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}
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}
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return js
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}
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func queryPlanFromProto(stages []*bq.ExplainQueryStage) []*ExplainQueryStage {
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var res []*ExplainQueryStage
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for _, s := range stages {
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var steps []*ExplainQueryStep
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for _, p := range s.Steps {
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steps = append(steps, &ExplainQueryStep{
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Kind: p.Kind,
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Substeps: p.Substeps,
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})
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}
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res = append(res, &ExplainQueryStage{
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ComputeRatioAvg: s.ComputeRatioAvg,
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ComputeRatioMax: s.ComputeRatioMax,
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ID: s.Id,
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Name: s.Name,
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ReadRatioAvg: s.ReadRatioAvg,
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ReadRatioMax: s.ReadRatioMax,
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RecordsRead: s.RecordsRead,
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RecordsWritten: s.RecordsWritten,
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Status: s.Status,
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Steps: steps,
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WaitRatioAvg: s.WaitRatioAvg,
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WaitRatioMax: s.WaitRatioMax,
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WriteRatioAvg: s.WriteRatioAvg,
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WriteRatioMax: s.WriteRatioMax,
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})
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}
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return res
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}
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// listTables returns a subset of tables that belong to a dataset, and a token for fetching the next subset.
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func (s *bigqueryService) listTables(ctx context.Context, projectID, datasetID string, pageSize int, pageToken string) ([]*Table, string, error) {
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var tables []*Table
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req := s.s.Tables.List(projectID, datasetID).
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PageToken(pageToken).
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Context(ctx)
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setClientHeader(req.Header())
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if pageSize > 0 {
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req.MaxResults(int64(pageSize))
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}
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var res *bq.TableList
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err := runWithRetry(ctx, func() (err error) {
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res, err = req.Do()
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return err
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})
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if err != nil {
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return nil, "", err
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}
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for _, t := range res.Tables {
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tables = append(tables, convertTableReference(t.TableReference))
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}
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return tables, res.NextPageToken, nil
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}
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type createTableConf struct {
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projectID, datasetID, tableID string
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expiration time.Time
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viewQuery string
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schema *bq.TableSchema
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useStandardSQL bool
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timePartitioning *TimePartitioning
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}
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// createTable creates a table in the BigQuery service.
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// expiration is an optional time after which the table will be deleted and its storage reclaimed.
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// If viewQuery is non-empty, the created table will be of type VIEW.
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// Note: expiration can only be set during table creation.
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// Note: after table creation, a view can be modified only if its table was initially created with a view.
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func (s *bigqueryService) createTable(ctx context.Context, conf *createTableConf) error {
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table := &bq.Table{
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// TODO(jba): retry? Is this always idempotent?
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TableReference: &bq.TableReference{
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ProjectId: conf.projectID,
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DatasetId: conf.datasetID,
|
|
TableId: conf.tableID,
|
|
},
|
|
}
|
|
if !conf.expiration.IsZero() {
|
|
table.ExpirationTime = conf.expiration.UnixNano() / 1e6
|
|
}
|
|
// TODO(jba): make it impossible to provide both a view query and a schema.
|
|
if conf.viewQuery != "" {
|
|
table.View = &bq.ViewDefinition{
|
|
Query: conf.viewQuery,
|
|
}
|
|
if conf.useStandardSQL {
|
|
table.View.UseLegacySql = false
|
|
table.View.ForceSendFields = append(table.View.ForceSendFields, "UseLegacySql")
|
|
}
|
|
}
|
|
if conf.schema != nil {
|
|
table.Schema = conf.schema
|
|
}
|
|
if conf.timePartitioning != nil {
|
|
table.TimePartitioning = &bq.TimePartitioning{
|
|
Type: "DAY",
|
|
ExpirationMs: int64(conf.timePartitioning.Expiration.Seconds() * 1000),
|
|
}
|
|
}
|
|
|
|
req := s.s.Tables.Insert(conf.projectID, conf.datasetID, table).Context(ctx)
|
|
setClientHeader(req.Header())
|
|
_, err := req.Do()
|
|
return err
|
|
}
|
|
|
|
func (s *bigqueryService) getTableMetadata(ctx context.Context, projectID, datasetID, tableID string) (*TableMetadata, error) {
|
|
req := s.s.Tables.Get(projectID, datasetID, tableID).Context(ctx)
|
|
setClientHeader(req.Header())
|
|
var table *bq.Table
|
|
err := runWithRetry(ctx, func() (err error) {
|
|
table, err = req.Do()
|
|
return err
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return bqTableToMetadata(table), nil
|
|
}
|
|
|
|
func (s *bigqueryService) deleteTable(ctx context.Context, projectID, datasetID, tableID string) error {
|
|
req := s.s.Tables.Delete(projectID, datasetID, tableID).Context(ctx)
|
|
setClientHeader(req.Header())
|
|
return runWithRetry(ctx, func() error { return req.Do() })
|
|
}
|
|
|
|
func bqTableToMetadata(t *bq.Table) *TableMetadata {
|
|
md := &TableMetadata{
|
|
Description: t.Description,
|
|
Name: t.FriendlyName,
|
|
Type: TableType(t.Type),
|
|
ID: t.Id,
|
|
NumBytes: t.NumBytes,
|
|
NumRows: t.NumRows,
|
|
ExpirationTime: unixMillisToTime(t.ExpirationTime),
|
|
CreationTime: unixMillisToTime(t.CreationTime),
|
|
LastModifiedTime: unixMillisToTime(int64(t.LastModifiedTime)),
|
|
}
|
|
if t.Schema != nil {
|
|
md.Schema = convertTableSchema(t.Schema)
|
|
}
|
|
if t.View != nil {
|
|
md.View = t.View.Query
|
|
}
|
|
if t.TimePartitioning != nil {
|
|
md.TimePartitioning = &TimePartitioning{
|
|
Expiration: time.Duration(t.TimePartitioning.ExpirationMs) * time.Millisecond,
|
|
}
|
|
}
|
|
if t.StreamingBuffer != nil {
|
|
md.StreamingBuffer = &StreamingBuffer{
|
|
EstimatedBytes: t.StreamingBuffer.EstimatedBytes,
|
|
EstimatedRows: t.StreamingBuffer.EstimatedRows,
|
|
OldestEntryTime: unixMillisToTime(int64(t.StreamingBuffer.OldestEntryTime)),
|
|
}
|
|
}
|
|
return md
|
|
}
|
|
|
|
func bqDatasetToMetadata(d *bq.Dataset) *DatasetMetadata {
|
|
/// TODO(jba): access
|
|
return &DatasetMetadata{
|
|
CreationTime: unixMillisToTime(d.CreationTime),
|
|
LastModifiedTime: unixMillisToTime(d.LastModifiedTime),
|
|
DefaultTableExpiration: time.Duration(d.DefaultTableExpirationMs) * time.Millisecond,
|
|
Description: d.Description,
|
|
Name: d.FriendlyName,
|
|
ID: d.Id,
|
|
Location: d.Location,
|
|
Labels: d.Labels,
|
|
}
|
|
}
|
|
|
|
// Convert a number of milliseconds since the Unix epoch to a time.Time.
|
|
// Treat an input of zero specially: convert it to the zero time,
|
|
// rather than the start of the epoch.
|
|
func unixMillisToTime(m int64) time.Time {
|
|
if m == 0 {
|
|
return time.Time{}
|
|
}
|
|
return time.Unix(0, m*1e6)
|
|
}
|
|
|
|
func convertTableReference(tr *bq.TableReference) *Table {
|
|
return &Table{
|
|
ProjectID: tr.ProjectId,
|
|
DatasetID: tr.DatasetId,
|
|
TableID: tr.TableId,
|
|
}
|
|
}
|
|
|
|
// patchTableConf contains fields to be patched.
|
|
type patchTableConf struct {
|
|
// These fields are omitted from the patch operation if nil.
|
|
Description *string
|
|
Name *string
|
|
Schema Schema
|
|
}
|
|
|
|
func (s *bigqueryService) patchTable(ctx context.Context, projectID, datasetID, tableID string, conf *patchTableConf) (*TableMetadata, error) {
|
|
t := &bq.Table{}
|
|
forceSend := func(field string) {
|
|
t.ForceSendFields = append(t.ForceSendFields, field)
|
|
}
|
|
|
|
if conf.Description != nil {
|
|
t.Description = *conf.Description
|
|
forceSend("Description")
|
|
}
|
|
if conf.Name != nil {
|
|
t.FriendlyName = *conf.Name
|
|
forceSend("FriendlyName")
|
|
}
|
|
if conf.Schema != nil {
|
|
t.Schema = conf.Schema.asTableSchema()
|
|
forceSend("Schema")
|
|
}
|
|
table, err := s.s.Tables.Patch(projectID, datasetID, tableID, t).
|
|
Context(ctx).
|
|
Do()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return bqTableToMetadata(table), nil
|
|
}
|
|
|
|
func (s *bigqueryService) insertDataset(ctx context.Context, datasetID, projectID string) error {
|
|
// TODO(jba): retry?
|
|
ds := &bq.Dataset{
|
|
DatasetReference: &bq.DatasetReference{DatasetId: datasetID},
|
|
}
|
|
req := s.s.Datasets.Insert(projectID, ds).Context(ctx)
|
|
setClientHeader(req.Header())
|
|
_, err := req.Do()
|
|
return err
|
|
}
|
|
|
|
func (s *bigqueryService) deleteDataset(ctx context.Context, datasetID, projectID string) error {
|
|
req := s.s.Datasets.Delete(projectID, datasetID).Context(ctx)
|
|
setClientHeader(req.Header())
|
|
return runWithRetry(ctx, func() error { return req.Do() })
|
|
}
|
|
|
|
func (s *bigqueryService) getDatasetMetadata(ctx context.Context, projectID, datasetID string) (*DatasetMetadata, error) {
|
|
req := s.s.Datasets.Get(projectID, datasetID).Context(ctx)
|
|
setClientHeader(req.Header())
|
|
var ds *bq.Dataset
|
|
if err := runWithRetry(ctx, func() (err error) {
|
|
ds, err = req.Do()
|
|
return err
|
|
}); err != nil {
|
|
return nil, err
|
|
}
|
|
return bqDatasetToMetadata(ds), nil
|
|
}
|
|
|
|
func (s *bigqueryService) listDatasets(ctx context.Context, projectID string, maxResults int, pageToken string, all bool, filter string) ([]*Dataset, string, error) {
|
|
req := s.s.Datasets.List(projectID).
|
|
Context(ctx).
|
|
PageToken(pageToken).
|
|
All(all)
|
|
setClientHeader(req.Header())
|
|
if maxResults > 0 {
|
|
req.MaxResults(int64(maxResults))
|
|
}
|
|
if filter != "" {
|
|
req.Filter(filter)
|
|
}
|
|
var res *bq.DatasetList
|
|
err := runWithRetry(ctx, func() (err error) {
|
|
res, err = req.Do()
|
|
return err
|
|
})
|
|
if err != nil {
|
|
return nil, "", err
|
|
}
|
|
var datasets []*Dataset
|
|
for _, d := range res.Datasets {
|
|
datasets = append(datasets, s.convertListedDataset(d))
|
|
}
|
|
return datasets, res.NextPageToken, nil
|
|
}
|
|
|
|
func (s *bigqueryService) convertListedDataset(d *bq.DatasetListDatasets) *Dataset {
|
|
return &Dataset{
|
|
ProjectID: d.DatasetReference.ProjectId,
|
|
DatasetID: d.DatasetReference.DatasetId,
|
|
}
|
|
}
|
|
|
|
// runWithRetry calls the function until it returns nil or a non-retryable error, or
|
|
// the context is done.
|
|
// See the similar function in ../storage/invoke.go. The main difference is the
|
|
// reason for retrying.
|
|
func runWithRetry(ctx context.Context, call func() error) error {
|
|
backoff := gax.Backoff{
|
|
Initial: 2 * time.Second,
|
|
Max: 32 * time.Second,
|
|
Multiplier: 2,
|
|
}
|
|
return internal.Retry(ctx, backoff, func() (stop bool, err error) {
|
|
err = call()
|
|
if err == nil {
|
|
return true, nil
|
|
}
|
|
return !retryableError(err), err
|
|
})
|
|
}
|
|
|
|
// Use the criteria in https://cloud.google.com/bigquery/troubleshooting-errors.
|
|
func retryableError(err error) bool {
|
|
e, ok := err.(*googleapi.Error)
|
|
if !ok {
|
|
return false
|
|
}
|
|
var reason string
|
|
if len(e.Errors) > 0 {
|
|
reason = e.Errors[0].Reason
|
|
}
|
|
return reason == "backendError" && (e.Code == 500 || e.Code == 503)
|
|
}
|