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App-Sqitch-v1.0.0
River stage one • 2 direct dependents • 2 total dependents
43 ++
/ App::Sqitch::Engine::snowflake

Name

App::Sqitch::Engine::snowflake - Sqitch Snowflake Engine

Synopsis

  my $snowflake = App::Sqitch::Engine->load( engine => 'snowflake' );

Description

App::Sqitch::Engine::snowflake provides the Snowflake storage engine for Sqitch.

Interface

Attributes

uri

Returns the Snowflake database URI name. It starts with the URI for the target and builds out missing parts. Sqitch looks for the host name in this order:

  1. In the host name of the target URI. If that host name does not end in snowflakecomputing.com, Sqitch appends it. This lets Snowflake URLs just reference the Snowflake account name or the account name and region in URLs.

  2. In the $SNOWSQL_HOST environment variable.

  3. By concatenating the account name and region, if available, from the $SNOWSQL_ACCOUNT environment variable or connections.accountname setting in the SnowSQL configuration file, the $SNOWSQL_REGION or connections.region setting in the SnowSQL configuration file, and snowflakecomputing.com.

The port defaults to 443, but uses to the $SNOWSQL_PORT environment variable if it's set. The database name is determined by the following methods:

  1. The path par t of the database URI.

  2. The $SNOWSQL_DATABASE environment variable.

  3. In the connections.dbname setting in the SnowSQL configuration file.

  4. If sqitch finds no value in the above places, it falls back on the system username.

Other attributes of the URI are set from the account, username and password attributes documented below.

account

Returns the Snowflake account name, or an exception if none can be determined. Sqitch looks for the account code in this order:

  1. In the host name of the target URI.

  2. In the $SNOWSQL_ACCOUNT environment variable.

  3. In the connections.accountname setting in the SnowSQL configuration file.

username

Returns the snowflake user name. Sqitch looks for the user name in this order:

  1. In the $SQITCH_USERNAME environment variable.

  2. In the target URI.

  3. In the $SNOWSQL_USER environment variable.

  4. In the connections.username variable from the SnowSQL config file.

  5. The system username.

password

Returns the snowflake password. Sqitch looks for the password in this order:

  1. In the $SQITCH_PASSWORD environment variable.

  2. In the target URI.

  3. In the $SNOWSQL_PWD environment variable.

  4. In the connections.password variable from the SnowSQL config file.

warehouse

Returns the warehouse to use for all connections. This value will be available to all Snowflake change scripts as the &warehouse variable. Sqitch looks for the warehouse in this order:

  1. In the warehouse query parameter of the target URI

  2. In the $SNOWSQL_WAREHOUSE environment variable.

  3. In the connections.warehousename variable from the SnowSQL config file.

  4. If none of the above are found, it falls back on the hard-coded value "sqitch".

role

Returns the role to use for all connections. Sqitch looks for the role in this order:

  1. In the role query parameter of the target URI

  2. In the $SNOWSQL_ROLE environment variable.

  3. In the connections.rolename variable from the SnowSQL config file.

  4. If none of the above are found, no role will be set.

Instance Methods

initialized

  $snowflake->initialize unless $snowflake->initialized;

Returns true if the database has been initialized for Sqitch, and false if it has not.

initialize

  $snowflake->initialize;

Initializes a database for Sqitch by installing the Sqitch registry schema.

snowsql

Returns a list containing the snowsql client and options to be passed to it. Used internally when executing scripts.

Author

David E. Wheeler <david@justatheory.com>

License

Copyright (c) 2012-2018 iovation Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.