public function init()
    {
        $this->createTableSQLCollector->init();
        $this->dropTableSQLCollector->init();
        $this->alterTableSQLCollector->init();

        $this->dropSequenceQueries = array();
        $this->dropViewQueries = array();
        $this->createViewQueries = array();
        $this->createSequenceQueries = array();
        $this->renameSchemaQueries = array();
    }