overview of changes

changes.md

Google Spanner

• v0.30.0
  • DML support added. See https://godoc.org/cloud.google.com/go/spanner#hdr-DML_and_Partitioned_DML for more information. (commit)
• v0.29.0
  • Add a metric for the number of sessions currently opened. (commit)
• v0.27.0
  • Fix a case where an iterator might not be closed correctly. (nothing)
• v0.24.0
  • Support struct-typed parameter bindings. (commit)
• v0.22.0
  • Support SessionLabels (commit)
• v0.20.1
  • Add CommitTimestamp, which supports inserting the commit timestamp of a transaction into a column (commit)
• v0.20.0
  • Support Batch API (commit)

    client.BatchReadOnlyTransaction

• v0.18.0
  • Add a ReadWithOptions that supports a row limit, as well as an index (commit)
  • Support query plan and execution statistics (commit)

  client.Single().AnalyzeQuery(ctx, Statement{sql, nil})
  client.Single().QueryWithStats(ctx, Statement{sql, nil})
  

  • Added OpenCensus support. (enable tracing for Go program https://godoc.org/go.opencensus.io/trace)
  • Recognize context errors (commit)
  • grpc: use only one channel on AppEngine by default

Pub/Sub

• BEHAVIOR CHANGE: Release flow control after ack/nack (instead of after the callback returns).
• pubsub/pstest: A lighweight fake for pubsub. Experimental; feedback welcome.
• Support updating more subscription metadata: AckDeadline, RetainAckedMessages and RetentionDuration.
• Add OpenCensus instrumentation for streaming pull.
• BEHAVIOR CHANGE: Don't backoff during next retryable error once stream is healthy.
• BEHAVIOR CHANGE: Don't backoff on EOF.
• pstest: Support Acknowledge and ModifyAckDeadline RPCs.
• Support labels on topics and subscriptions.
• Support message storage policy for topics.
• Use the distribution of ack times to determine when to extend ack deadlines. The only user-visible effect of this change should be that programs that call only Subscription.Receive need no IAM permissions other than Pub/Sub Subscriber.
• Canceling the context passed to Subscription.Receive causes Receive to return when processing finishes on all messages currently in progress, even if new messages are arriving.
• BEHAVIOR CHANGE: Receive doesn't retry if an RPC returns codes.Cancelled.
• BEHAVIOR CHANGE: Receive retries on Unavailable intead of returning.
• Fix deadlock.
• Restore Ack/Nack/Modacks metrics.
• Improve context handling in iterator.
• Implement synchronous mode for Receive.
• pstest: add Pull.