implement big query migration driver

Author: ocramh

Makefile

@@ -1,5 +1,5 @@
 SOURCE ?= file go_bindata github github_ee bitbucket aws_s3 google_cloud_storage godoc_vfs gitlab
-DATABASE ?= postgres mysql redshift cassandra spanner cockroachdb yugabytedb clickhouse mongodb sqlserver firebird neo4j pgx pgx5 rqlite
+DATABASE ?= postgres mysql redshift cassandra spanner cockroachdb yugabytedb clickhouse mongodb sqlserver firebird neo4j pgx pgx5 rqlite bigquery
 DATABASE_TEST ?= $(DATABASE) sqlite sqlite3 sqlcipher
 VERSION ?= $(shell git describe --tags 2>/dev/null | cut -c 2-)
 TEST_FLAGS ?=

README.md

@@ -44,6 +44,7 @@ Database drivers run migrations. [Add a new database?](database/driver.go)
 * [Firebird](database/firebird)
 * [MS SQL Server](database/sqlserver)
 * [rqlite](database/rqlite)
+* [Big Query](database/bigquery)
 
 ### Database URLs
 
@@ -194,3 +195,4 @@ Also have a look at the [FAQ](FAQ.md).
 ---
 
 Looking for alternatives? [https://awesome-go.com/#database](https://awesome-go.com/#database).
+

database/bigquery/README.md

@@ -0,0 +1,20 @@
+# Big Query
+
+See the official [Google Big Query Documentation](https://cloud.google.com/bigquery/docs) for more details.
+
+The provided database URL must be in the following format:
+
+`bigquery://{projectId}/{datasetId}?param=true`
+
+where
+
+- `projectId` is to be replaced with the name of the Google Cloud Platform (GCP) project Id where the Big Query instance has been created.
+- `datasetId` is to be replaced with the name of the dataset where migrations will be executed.
+
+| Param                    | WithInstance Config | Description                                                                                                                   |
+| ------------------------ | ------------------- | ----------------------------------------------------------------------------------------------------------------------------- |
+| `x-migrations-table`     | `MigrationsTable`   | Name of the migrations table                                                                                                  |
+| `x-stmt-timeout`         | `StmtTimeout`       | Duration after which queries are automatically terminated                                                                     |
+| `x-gcp-credentials-file` |                     | Location of a credential JSON file to use for authenticating the Big Query client                                             |
+| `x-insecure`             |                     | When true it specifies that no authentication should be used. To be used for testing purposes only                            |
+| `x-endpoint`             |                     | Overrides the default endpoint to be used by the client when connecting to the database. To be used for testing purposes only |