Author: André Rothe (andre.rothe@phosco.info)
Inheritance: extends AbstractProcessor
 protected function processPartitionDefinition($unparsed)
 {
     $processor = new PartitionDefinitionProcessor($this->options);
     $expr = $this->removeParenthesisFromStart($unparsed);
     $expr = $this->splitSQLIntoTokens($expr);
     return $processor->process($expr);
 }