spanner: extract retry info from status

The Spanner client used to extract RetryInfo from the trailers of a
gRPC request. This meant that an extra option had to be added to the
gRPC call to ensure that the trailers were parsed. It also meant that
these trailers needed to be kept in a separate field in spanner.Error.

RetryInfo and other specific error details are however also included in
the wrapped statusError. Instead of getting this information from the
trailers of the request, the Spanner client should get it directly from
the wrapped statusError. This makes it less error prone, as we don't
have to specify extra options for the RPCs where we might want trailers
to be parsed. It also prepares the Spanner client for getting other
additional information from the wrapped statusError, such as additional
information on the type of resource that was not found. This will
allow us to stop parsing textual error messages to determine whether an
error was a 'Session not found' error, and instead use the details from
the statusError.

Fixes #1813.

Change-Id: I9fab63c5f2e3c8d632f136fe3822c170318c5d78
Reviewed-by: kokoro <>
Reviewed-by: Hengfeng Li <>
10 files changed
tree: 62a41531c6e3600a651981a89c37bade9992e948
  1. .github/
  2. .gitignore
  9. asset/
  10. automl/
  11. bigquery/
  12. bigtable/
  13. billing/
  14. civil/
  15. cloudbuild/
  16. cloudtasks/
  17. cmd/
  18. compute/
  19. container/
  20. containeranalysis/
  21. datacatalog/
  22. dataproc/
  23. datastore/
  24. debugger/
  25. dialogflow/
  26. dlp/
  27. doc.go
  28. errorreporting/
  29. examples_test.go
  30. expr/
  31. firestore/
  32. functions/
  33. go.mod
  34. go.sum
  35. grafeas/
  36. httpreplay/
  37. iam/
  38. internal/
  39. iot/
  40. irm/
  41. kms/
  42. language/
  43. license_test.go
  44. logging/
  45. longrunning/
  46. memcache/
  47. monitoring/
  48. osconfig/
  49. oslogin/
  50. phishingprotection/
  51. profiler/
  52. pubsub/
  53. recaptchaenterprise/
  54. recommender/
  55. redis/
  56. rpcreplay/
  57. scheduler/
  58. secretmanager/
  59. securitycenter/
  60. spanner/
  61. speech/
  62. storage/
  63. talent/
  64. texttospeech/
  65. tools.go
  66. trace/
  67. translate/
  68. videointelligence/
  69. vision/
  70. webrisk/

Google Cloud Client Libraries for Go


Go packages for Google Cloud Platform services.

import ""

To install the packages on your system, do not clone the repo. Instead:

  1. Change to your project directory:

    cd /my/cloud/project
  2. Get the package you want to use. Some products have their own module, so it's best to go get the package(s) you want to use:

    $ go get # Replace with the package you want to use.

NOTE: Some of these packages are under development, and may occasionally make backwards-incompatible changes.

NOTE: Github repo is a mirror of

Supported APIs

Google APIStatusPackage
Data Loss
Text To

Alpha status: the API is still being actively developed. As a result, it might change in backward-incompatible ways and is not recommended for production use.

Beta status: the API is largely complete, but still has outstanding features and bugs to be addressed. There may be minor backwards-incompatible changes where necessary.

Stable status: the API is mature and ready for production use. We will continue addressing bugs and feature requests.

Documentation and examples are available at

Go Versions Supported

We support the two most recent major versions of Go. If Google App Engine uses an older version, we support that as well.


By default, each API will use Google Application Default Credentials for authorization credentials used in calling the API endpoints. This will allow your application to run in many environments without requiring explicit configuration.

client, err := storage.NewClient(ctx)

To authorize using a JSON key file, pass option.WithCredentialsFile to the NewClient function of the desired package. For example:

client, err := storage.NewClient(ctx, option.WithCredentialsFile("path/to/keyfile.json"))

You can exert more control over authorization by using the package to create an oauth2.TokenSource. Then pass option.WithTokenSource to the NewClient function: snip:# (auth-ts)

tokenSource := ...
client, err := storage.NewClient(ctx, option.WithTokenSource(tokenSource))


Contributions are welcome. Please, see the CONTRIBUTING document for details. We‘re using Gerrit for our code reviews. Please don’t open pull requests against this repo, new pull requests will be automatically closed.

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms. See Contributor Code of Conduct for more information.