[DAT-17482] Integrating Bigquery into liquibase

liquibase-bigquery/LICENSE

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liquibase-bigquery/README.md

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+# Liquibase Support for Google BigQuery
+
+A Liquibase extension adding support for Google BigQuery.
+Include this in your application project to run Liquibase database migration scripts
+against a Google BigQuery database.
+
+Try out the [Liquibase + Bigquery with the getting started tutorial](https://contribute.liquibase.com/extensions-integrations/directory/database-tutorials/bigquery/).
+
+## Supported features
+
+The following Liquibase ChangeTypes are supported:
+
+- createTable
+- dropTable
+- addColumn
+- modifyDataType
+- addLookupTable
+- createView
+- dropView
+
+## Limitations
+
+Currently, not supported are:
+
+- constraints
+- sequences
+- primary and foreign keys
+- remarks
+- column merging
+- auto-increments
+- check constraints
+- indexes
+- triggers
+
+## Getting started
+
+### Installing and setting up liquibase
+
+Download and install liquibase from
+[here](https://docs.liquibase.com/install/liquibase-windows.html).
+
+### JDBC driver for BigQuery
+
+You will also need JDBC driver for BigQuery.
+BigQuery documentation will redirect you to where you can
+[download](https://cloud.google.com/bigquery/docs/reference/odbc-jdbc-drivers)
+supported JDBC/ODBC drivers
+
+Click JDBC 4.2-compatible to start downloading the corresponding zip file.
+When you unzip it you will find quite some number of jars and one of them,
+named GoogleBigQueryJDBC42.jar,
+will represent our BigQuery JDBC driver.
+Add files from the archive to the liquibase lib directory.
+
+### Liquibase BigQuery extension
+
+Before building the extension be sure to locally install the Simba driver as follows:
+
+```bash
+mvn install:install-file -Dfile=lib/GoogleBigQueryJDBC42.jar -DgroupId=com.simba.googlebigquery.jdbc -DartifactId=GoogleBigQueryJDBC42 -Dversion=4.2 -Dpackaging=jar
+````
+
+Build this project with `mvn` or download the jar file
+corresponding to the latest release and put it
+into `liquibase/lib` lib directory.
+
+### Starting BigQuery dataset
+
+You can create a BigQuery dataset in the GCP console, use terraform or bq client.
+
+### Test your connection
+
+Give the extension temporary use of your BigQuery user credentials for API access
+by running the following gcloud command:
+
+```sh
+gcloud auth application-default login
+```
+
+### Create configuration file
+
+Configure the connection in the file `liquibase.properties`
+
+```properties
+driver:
+url:
+logLevel:
+```
+
+url represents JDBC connection string.
+After the official documentation the following is the format of the
+connection URL for the Simba Google BigQuery JDBC Connector:
+
+`jdbc:bigquery://[Host]:[Port];ProjectId=[Project];OAuthType= [AuthValue];
+[Property1]=[Value1];[Property2]=[Value2];…`
+
+where:
+
+- [Host] - is the DNS or IP address of the server.
+Set it to `https://www.googleapis.com/bigquery/v2`
+- [Port] - is the number of the TCP port to connect to. Set it to 443.
+- [Project] - is the id of your BigQuery project.
+- [AuthValue] - is a number that specifies the type of authentication
+used by the connector.
+
+The Simba Google BigQuery JDBC Connector uses the OAuth 2.0 protocol
+for authentication and authorization.
+It authenticates your connection through Google OAuth APIs.
+You can configure the connector to provide your credentials
+and authenticate the connection to the database using one of the
+following methods:
+
+- Using a Google User Account
+- Using a Google Service Account
+- Using Pre-Generated Access and Refresh Tokens
+- Using Application Default Credentials
+
+Example shows authentication using Google Service Account
+
+```properties
+driver: com.simba.googlebigquery.jdbc.Driver
+url: jdbc:bigquery://https://www.googleapis.com/bigquery/v2:443;ProjectId=<PROJECT_ID>;\
+  DefaultDataset=<DATASET_ID>;OAuthType=0;OAuthServiceAcctEmail=<SA_ACCOUNT>;\
+  OAuthPvtKeyPath=<PATH_TO_KEY_FOR_SA>;
+logLevel: WARN
+```
+
+### Run
+
+- updating the database schema
+
+```shell
+liquibase --changeLogFile=changelog.bigquery.sql update
+```
+
+- generating the schema from current database state
+
+More detailed instructions for getting started can be found
+[here](https://medium.com/google-cloud/version-control-of-bigquery-schema-changes-with-liquibase-ddc7092d6d1d)
+
+## Using the Liquibase Test Harness in BigQuery Extension
+
+### Configuring the project
+
+Fill in `harness-config.yml` in `src/test/resources` directory.
+
+### Executing with maven
+
+Build project without tests
+
+```sh
+mvn package -DskipTests
+```
+
+To run all harness tests for the extension run
+
+```sh
+mvn -Dit.test=LiquibaseHarnessSuiteIT verify
+```
+
+To run only subset of tests, add `-DchangeObjects` parameter,
+with list of tests that should be included
+
+```sh
+mvn -Dit.test=LiquibaseHarnessSuiteIT -DchangeObjects=addLookupTable verify
+ ```
+
+### Executing from IDE
+
+From IDE you can run `src/test/groovy/LiquibaseHarnessSuiteIT` test.
+You can narrow down the list of harness tests by specifying `-DchangeObjects`
+VM argument in Run Configuration.

liquibase-bigquery/bigquery.sql

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+--liquibase formatted sql
+
+--changeset myuser:create-a-table
+
+create table liquibase_test_harness.dim_channels
+(
+dim_channel_key smallint,
+channel_name  STRING(40),
+channel_type STRING(40) NOT NULL,
+channel_sub_type  STRING(40) NOT NULL,
+storing_order integer NOT NULL,
+channel_display_name  STRING(40) NOT NULL,
+channel_code  STRING(40) NOT NULL,
+created_date timestamp, ##Note that a TIMESTAMP itself does not have a time zone
+last_modified_date timestamp,
+oem_owner  STRING(40) NOT NULL,
+publisher  STRING(40) NOT NULL
+)
+;