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Google BigQuery support for Spark, SQL, and DataFrames

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MAINTENANCE MODE
================

THIS PROJECT IS IN MAINTENANCE MODE DUE TO THE FACT THAT IT'S NOT WIDELY USED WITHIN SPOTIFY. WE'LL PROVIDE BEST EFFORT SUPPORT FOR ISSUES AND PULL REQUESTS BUT DO EXPECT DELAY IN RESPONSES.

spark-bigquery
==============

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Google BigQuery support for Spark, SQL, and DataFrames.

| spark-bigquery version | Spark version | Comment |
| :--------------------: | ------------- | ------- |
| 0.2.x | 2.x.y | Active development |
| 0.1.x | 1.x.y | Development halted |

To use the package in a Google [Cloud Dataproc](https://cloud.google.com/dataproc/) cluster:

install `org.apache.avro_avro-ipc-1.7.7.jar` to `~/.ivy2/jars`

`spark-shell --packages com.spotify:spark-bigquery_2.10:0.2.2`

To use it in a local SBT console:

```scala
import com.spotify.spark.bigquery._

// Set up GCP credentials
sqlContext.setGcpJsonKeyFile("<JSON_KEY_FILE>")

// Set up BigQuery project and bucket
sqlContext.setBigQueryProjectId("<BILLING_PROJECT>")
sqlContext.setBigQueryGcsBucket("<GCS_BUCKET>")

// Set up BigQuery dataset location, default is US
sqlContext.setBigQueryDatasetLocation("<DATASET_LOCATION>")
```

Usage:

```scala
// Load everything from a table
val table = sqlContext.bigQueryTable("bigquery-public-data:samples.shakespeare")

// Load results from a SQL query
// Only legacy SQL dialect is supported for now
val df = sqlContext.bigQuerySelect(
  "SELECT word, word_count FROM [bigquery-public-data:samples.shakespeare]")

// Save data to a table
df.saveAsBigQueryTable("my-project:my_dataset.my_table")
```

If you'd like to write nested records to BigQuery, be sure to specify an Avro Namespace.
BigQuery is unable to load Avro Namespaces with a leading dot (`.nestedColumn`) on nested records.

```scala
// BigQuery is able to load fields with namespace 'myNamespace.nestedColumn'
df.saveAsBigQueryTable("my-project:my_dataset.my_table", tmpWriteOptions = Map("recordNamespace" -> "myNamespace"))
```
See also
[Loading Avro Data from Google Cloud Storage](https://cloud.google.com/bigquery/docs/loading-data-cloud-storage-avro)
for data type mappings and limitations. For example loading arrays of arrays is not supported.

# License

Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0

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