Class Engine

Basic Engine implementation using PDO as it's DBAPI layer

Alchemy\engine\Engine implements Alchemy\engine\IEngine

Namespace: Alchemy\engine
Located at alchemy/engine/Engine.php

Methods summary
`public`	# `__construct( Alchemy\dialect\Compiler $compiler, string $dsn, string $username = '', mixed $password = '' )` Object constructor. Opens a connection to the database using PDO Object constructor. Opens a connection to the database using PDO Parameters `$compiler` `string` $dsn See PDO documentation for DSN reference `$dsn` `string` $username `$username` `string` $password `$password`
`public`	# `beginTransaction( )` Start an atomic transaction on the database. These should generally not be held open very long in order to prevent deadlocks Start an atomic transaction on the database. These should generally not be held open very long in order to prevent deadlocks Implementation of `Alchemy\engine\IEngine::beginTransaction()`
`public`	# `commitTransaction( )` Commit a transaction as complete Commit a transaction as complete Implementation of `Alchemy\engine\IEngine::commitTransaction()`
`protected integer`	# `getBindParamType( object $obj )` Get the PDO bind-parameter type (default PARAM_STR) for an object Get the PDO bind-parameter type (default PARAM_STR) for an object Parameters `$obj` `object` $obj Returns `integer`
`protected`	# `echoQuery( string $sql, mixed $params )` Log a SQL statement if echo is enabled Log a SQL statement if echo is enabled Parameters `$sql` `string` $sql `$params`
`public Alchemy\engine\ResultSet`	# `query( Alchemy\core\query\IQuery $query )` Compile and run a SQL expression on the database Compile and run a SQL expression on the database Parameters `$query` `Alchemy\core\query\IQuery` Query to compile Returns `Alchemy\engine\ResultSet` Implementation of `Alchemy\engine\IEngine::query()`
`public Alchemy\engine\ResultSet`	# `execute( string $sql, array $params = array() )` Execute raw SQL on the database connection Execute raw SQL on the database connection Parameters `$sql` `string` $sql Statement string `$params` `array` $params Params to bind to statement Returns `Alchemy\engine\ResultSet` Implementation of `Alchemy\engine\IEngine::execute()`
`public`	# `rollbackTransaction( )` Revert a pending transaction on the database Revert a pending transaction on the database Implementation of `Alchemy\engine\IEngine::rollbackTransaction()`
`public`	# `setEcho( mixed $echoQueries )` Optionally enable echo'ing of SQL run on the RDBMS. Optionally enable echo'ing of SQL run on the RDBMS. Parameters `$echoQueries` `mixed` $echoQueries False to disable. True to log to STDOUT. Callable to enable custom logging

Properties summary
`protected mixed`	`$compiler`		#
`protected mixed`	`$connector`		#
`protected boolean`	`$echoQueries`	`false`	#
`protected boolean`	`$pendingTransaction`	`false`	#