December 12, 2016

Beta release of BigQuery, DataStore, Logging and Storage. See the blog post.

Also, BigQuery now supports structs. Read a row directly into a struct with RowIterator.Next, and upload a row directly from a struct with Uploader.Put. You can also use field tags. See the [package documentation][cloud-bigquery-ref] for details.

December 5, 2016

More changes to BigQuery:

The ValueList type was removed. It is no longer necessary. Instead of

var v ValueList
... it.Next(&v) ..

use

var v []Value
... it.Next(&v) ...

Previously, repeatedly calling RowIterator.Next on the same []Value or ValueList would append to the slice. Now each call resets the size to zero first.
Schema inference will infer the SQL type BYTES for a struct field of type []byte. Previously it inferred STRING.
The types uint, uint64 and uintptr are no longer supported in schema inference. BigQuery's integer type is INT64, and those types may hold values that are not correctly represented in a 64-bit signed integer.
The SQL types DATE, TIME and DATETIME are now supported. They correspond to the Date, Time and DateTime types in the new cloud.google.com/go/civil package.

November 17, 2016

Change to BigQuery: values from INTEGER columns will now be returned as int64, not int. This will avoid errors arising from large values on 32-bit systems.

November 8, 2016

New datastore feature: datastore now encodes your nested Go structs as Entity values, instead of a flattened list of the embedded struct's fields. This means that you may now have twice-nested slices, eg.

type State struct {
  Cities  []struct{
    Populations []int
  }
}

See the announcement for more details.

November 8, 2016

Breaking changes to datastore: contexts no longer hold namespaces; instead you must set a key's namespace explicitly. Also, key functions have been changed and renamed.

The WithNamespace function has been removed. To specify a namespace in a Query, use the Query.Namespace method:
```
q := datastore.NewQuery("Kind").Namespace("ns")
```
All the fields of Key are exported. That means you can construct any Key with a struct literal:
```
k := &Key{Kind: "Kind",  ID: 37, Namespace: "ns"}
```
As a result of the above, the Key methods Kind, ID, d.Name, Parent, SetParent and Namespace have been removed.
NewIncompleteKey has been removed, replaced by IncompleteKey. Replace
```
NewIncompleteKey(ctx, kind, parent)
```
with
```
IncompleteKey(kind, parent)
```
and if you do use namespaces, make sure you set the namespace on the returned key.
NewKey has been removed, replaced by NameKey and IDKey. Replace
```
NewKey(ctx, kind, name, 0, parent)
NewKey(ctx, kind, "", id, parent)
```
with
```
NameKey(kind, name, parent)
IDKey(kind, id, parent)
```
and if you do use namespaces, make sure you set the namespace on the returned key.
The Done variable has been removed. Replace datastore.Done with iterator.Done, from the package google.golang.org/api/iterator.
The Client.Close method will have a return type of error. It will return the result of closing the underlying gRPC connection.

See the announcement for more details.

October 27, 2016

Breaking change to bigquery: NewGCSReference is now a function, not a method on Client.

New bigquery feature: Table.LoaderFrom now accepts a ReaderSource, enabling loading data into a table from a file or any io.Reader.

October 21, 2016

Breaking change to pubsub: removed pubsub.Done.

Use iterator.Done instead, where iterator is the package google.golang.org/api/iterator.

October 19, 2016

Breaking changes to cloud.google.com/go/bigquery:

Client.Table and Client.OpenTable have been removed. Replace

client.OpenTable("project", "dataset", "table")

with

client.DatasetInProject("project", "dataset").Table("table")

Client.CreateTable has been removed. Replace

client.CreateTable(ctx, "project", "dataset", "table")

with

client.DatasetInProject("project", "dataset").Table("table").Create(ctx)

Dataset.ListTables have been replaced with Dataset.Tables. Replace

tables, err := ds.ListTables(ctx)

with

it := ds.Tables(ctx)
for {
    table, err := it.Next()
    if err == iterator.Done {
        break
    }
    if err != nil {
        // TODO: Handle error.
    }
    // TODO: use table.
}

Client.Read has been replaced with Job.Read, Table.Read and Query.Read. Replace
```
it, err := client.Read(ctx, job)
```
with
```
it, err := job.Read(ctx)
```
and similarly for reading from tables or queries.

The iterator returned from the Read methods is now named RowIterator. Its behavior is closer to the other iterators in these libraries. It no longer supports the Schema method; see the next item. Replace

for it.Next(ctx) {
    var vals ValueList
    if err := it.Get(&vals); err != nil {
        // TODO: Handle error.
    }
    // TODO: use vals.
}
if err := it.Err(); err != nil {
    // TODO: Handle error.
}

with

for {
    var vals ValueList
    err := it.Next(&vals)
    if err == iterator.Done {
        break
    }
    if err != nil {
        // TODO: Handle error.
    }
    // TODO: use vals.
}

Instead of the RecordsPerRequest(n) option, write

it.PageInfo().MaxSize = n

Instead of the StartIndex(i) option, write

it.StartIndex = i

ValueLoader.Load now takes a Schema in addition to a slice of Values. Replace

func (vl *myValueLoader) Load(v []bigquery.Value)

with

func (vl *myValueLoader) Load(v []bigquery.Value, s bigquery.Schema)

Table.Patch is replace by Table.Update. Replace

p := table.Patch()
p.Description("new description")
metadata, err := p.Apply(ctx)

with

metadata, err := table.Update(ctx, bigquery.TableMetadataToUpdate{
    Description: "new description",
})

Client.Copy is replaced by separate methods for each of its four functions. All options have been replaced by struct fields.
- To load data from Google Cloud Storage into a table, use Table.LoaderFrom.
  
  Replace
```
client.Copy(ctx, table, gcsRef)
```
  with
```
table.LoaderFrom(gcsRef).Run(ctx)
```
  Instead of passing options to Copy, set fields on the Loader:
```
loader := table.LoaderFrom(gcsRef)
loader.WriteDisposition = bigquery.WriteTruncate
```
- To extract data from a table into Google Cloud Storage, use Table.ExtractorTo. Set fields on the returned Extractor instead of passing options.
  
  Replace
```
client.Copy(ctx, gcsRef, table)
```
  with
```
table.ExtractorTo(gcsRef).Run(ctx)
```
- To copy data into a table from one or more other tables, use Table.CopierFrom. Set fields on the returned Copier instead of passing options.
  
  Replace
```
client.Copy(ctx, dstTable, srcTable)
```
  with
```
dst.Table.CopierFrom(srcTable).Run(ctx)
```
- To start a query job, create a Query and call its Run method. Set fields on the query instead of passing options.
  
  Replace
```
client.Copy(ctx, table, query)
```
  with
```
query.Run(ctx)
```

Table.NewUploader has been renamed to Table.Uploader. Instead of options, configure an Uploader by setting its fields. Replace

u := table.NewUploader(bigquery.UploadIgnoreUnknownValues())

with

u := table.NewUploader(bigquery.UploadIgnoreUnknownValues())
u.IgnoreUnknownValues = true

October 10, 2016

Breaking changes to cloud.google.com/go/storage:

AdminClient replaced by methods on Client. Replace

adminClient.CreateBucket(ctx, bucketName, attrs)

with

client.Bucket(bucketName).Create(ctx, projectID, attrs)

BucketHandle.List replaced by BucketHandle.Objects. Replace

for query != nil {
    objs, err := bucket.List(d.ctx, query)
    if err != nil { ... }
    query = objs.Next
    for _, obj := range objs.Results {
        fmt.Println(obj)
    }
}

with

iter := bucket.Objects(d.ctx, query)
for {
    obj, err := iter.Next()
    if err == iterator.Done {
        break
    }
    if err != nil { ... }
    fmt.Println(obj)
}

(The iterator package is at google.golang.org/api/iterator.)

Replace Query.Cursor with ObjectIterator.PageInfo().Token.

Replace Query.MaxResults with ObjectIterator.PageInfo().MaxSize.

ObjectHandle.CopyTo replaced by ObjectHandle.CopierFrom. Replace

attrs, err := src.CopyTo(ctx, dst, nil)

with

attrs, err := dst.CopierFrom(src).Run(ctx)

Replace

attrs, err := src.CopyTo(ctx, dst, &storage.ObjectAttrs{ContextType: "text/html"})

with

c := dst.CopierFrom(src)
c.ContextType = "text/html"
attrs, err := c.Run(ctx)

ObjectHandle.ComposeFrom replaced by ObjectHandle.ComposerFrom. Replace

attrs, err := dst.ComposeFrom(ctx, []*storage.ObjectHandle{src1, src2}, nil)

with

attrs, err := dst.ComposerFrom(src1, src2).Run(ctx)

ObjectHandle.Update's ObjectAttrs argument replaced by ObjectAttrsToUpdate. Replace

attrs, err := obj.Update(ctx, &storage.ObjectAttrs{ContextType: "text/html"})

with

attrs, err := obj.Update(ctx, storage.ObjectAttrsToUpdate{ContextType: "text/html"})

ObjectHandle.WithConditions replaced by ObjectHandle.If. Replace

obj.WithConditions(storage.Generation(gen), storage.IfMetaGenerationMatch(mgen))

with

obj.Generation(gen).If(storage.Conditions{MetagenerationMatch: mgen})

Replace

obj.WithConditions(storage.IfGenerationMatch(0))

with

obj.If(storage.Conditions{DoesNotExist: true})

storage.Done replaced by iterator.Done (from package google.golang.org/api/iterator).

October 6, 2016

Package preview/logging deleted. Use logging instead.

September 27, 2016

Logging client replaced with preview version (see below).

September 8, 2016

New clients for some of Google's Machine Learning APIs: Vision, Speech, and Natural Language.
Preview version of a new [Stackdriver Logging][cloud-logging] client in cloud.google.com/go/preview/logging. This client uses gRPC as its transport layer, and supports log reading, sinks and metrics. It will replace the current client at cloud.google.com/go/logging shortly.

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