public function process($out)
 {
     if (!$out) {
         return false;
     }
     if (!empty($out['BRACKET'])) {
         // TODO: this field should be a global STATEMENT field within the output
         // we could add all other categories as sub_tree, it could also work with multipe UNIONs
         $processor = new BracketProcessor();
         $out['BRACKET'] = $processor->process($out['BRACKET']);
     }
     if (!empty($out['CREATE'])) {
         $processor = new CreateProcessor();
         $out['CREATE'] = $processor->process($out['CREATE']);
     }
     if (!empty($out['TABLE'])) {
         $processor = new TableProcessor();
         $out['TABLE'] = $processor->process($out['TABLE']);
         $this->moveLIKE($out);
     }
     if (!empty($out['INDEX'])) {
         $processor = new IndexProcessor();
         $out['INDEX'] = $processor->process($out['INDEX']);
     }
     if (!empty($out['EXPLAIN'])) {
         $processor = new ExplainProcessor();
         $out['EXPLAIN'] = $processor->process($out['EXPLAIN'], array_keys($out));
     }
     if (!empty($out['DESCRIBE'])) {
         $processor = new DescribeProcessor();
         $out['DESCRIBE'] = $processor->process($out['DESCRIBE'], array_keys($out));
     }
     if (!empty($out['DESC'])) {
         $processor = new DescProcessor();
         $out['DESC'] = $processor->process($out['DESC'], array_keys($out));
     }
     if (!empty($out['SELECT'])) {
         $processor = new SelectProcessor();
         $out['SELECT'] = $processor->process($out['SELECT']);
     }
     if (!empty($out['FROM'])) {
         $processor = new FromProcessor();
         $out['FROM'] = $processor->process($out['FROM']);
     }
     if (!empty($out['USING'])) {
         $processor = new UsingProcessor();
         $out['USING'] = $processor->process($out['USING']);
     }
     if (!empty($out['UPDATE'])) {
         $processor = new UpdateProcessor();
         $out['UPDATE'] = $processor->process($out['UPDATE']);
     }
     if (!empty($out['GROUP'])) {
         // set empty array if we have partial SQL statement
         $processor = new GroupByProcessor();
         $out['GROUP'] = $processor->process($out['GROUP'], isset($out['SELECT']) ? $out['SELECT'] : array());
     }
     if (!empty($out['ORDER'])) {
         // set empty array if we have partial SQL statement
         $processor = new OrderByProcessor();
         $out['ORDER'] = $processor->process($out['ORDER'], isset($out['SELECT']) ? $out['SELECT'] : array());
     }
     if (!empty($out['LIMIT'])) {
         $processor = new LimitProcessor();
         $out['LIMIT'] = $processor->process($out['LIMIT']);
     }
     if (!empty($out['WHERE'])) {
         $processor = new WhereProcessor();
         $out['WHERE'] = $processor->process($out['WHERE']);
     }
     if (!empty($out['HAVING'])) {
         $processor = new HavingProcessor();
         $out['HAVING'] = $processor->process($out['HAVING'], isset($out['SELECT']) ? $out['SELECT'] : array());
     }
     if (!empty($out['SET'])) {
         $processor = new SetProcessor();
         $out['SET'] = $processor->process($out['SET'], isset($out['UPDATE']));
     }
     if (!empty($out['DUPLICATE'])) {
         $processor = new DuplicateProcessor();
         $out['ON DUPLICATE KEY UPDATE'] = $processor->process($out['DUPLICATE']);
         unset($out['DUPLICATE']);
     }
     if (!empty($out['INSERT'])) {
         $processor = new InsertProcessor();
         $out = $processor->process($out);
     }
     if (!empty($out['REPLACE'])) {
         $processor = new ReplaceProcessor();
         $out = $processor->process($out);
     }
     if (!empty($out['DELETE'])) {
         $processor = new DeleteProcessor();
         $out = $processor->process($out);
     }
     if (!empty($out['VALUES'])) {
         $processor = new ValuesProcessor();
         $out = $processor->process($out);
     }
     if (!empty($out['INTO'])) {
         $processor = new IntoProcessor();
         $out = $processor->process($out);
     }
     if (!empty($out['DROP'])) {
         $processor = new DropProcessor();
         $out['DROP'] = $processor->process($out['DROP']);
     }
     if (!empty($out['RENAME'])) {
         $processor = new RenameProcessor();
         $out['RENAME'] = $processor->process($out['RENAME']);
     }
     if (!empty($out['SHOW'])) {
         $processor = new ShowProcessor();
         $out['SHOW'] = $processor->process($out['SHOW']);
     }
     if (!empty($out['OPTIONS'])) {
         $processor = new OptionsProcessor();
         $out['OPTIONS'] = $processor->process($out['OPTIONS']);
     }
     if (!empty($out['WITH'])) {
         $processor = new WithProcessor();
         $out['WITH'] = $processor->process($out['WITH']);
     }
     return $out;
 }
 public function process($out)
 {
     if (!$out) {
         return false;
     }
     if (!empty($out['CREATE'])) {
         $processor = new CreateProcessor();
         $out['CREATE'] = $processor->process($out['CREATE']);
     }
     if (!empty($out['TABLE'])) {
         $processor = new TableProcessor();
         $out['TABLE'] = $processor->process($out['TABLE']);
         $this->moveLIKE($out);
     }
     if (!empty($out['EXPLAIN'])) {
         $processor = new ExplainProcessor();
         $out['EXPLAIN'] = $processor->process($out['EXPLAIN'], array_keys($out));
     }
     if (!empty($out['DESCRIBE'])) {
         $processor = new DescribeProcessor();
         $out['DESCRIBE'] = $processor->process($out['DESCRIBE'], array_keys($out));
     }
     if (!empty($out['DESC'])) {
         $processor = new DescProcessor();
         $out['DESC'] = $processor->process($out['DESC'], array_keys($out));
     }
     if (!empty($out['SELECT'])) {
         $processor = new SelectProcessor();
         $out['SELECT'] = $processor->process($out['SELECT']);
     }
     if (!empty($out['FROM'])) {
         $processor = new FromProcessor();
         $out['FROM'] = $processor->process($out['FROM']);
     }
     if (!empty($out['USING'])) {
         $processor = new UsingProcessor();
         $out['USING'] = $processor->process($out['USING']);
     }
     if (!empty($out['UPDATE'])) {
         $processor = new UpdateProcessor();
         $out['UPDATE'] = $processor->process($out['UPDATE']);
     }
     if (!empty($out['GROUP'])) {
         // set empty array if we have partial SQL statement
         $processor = new GroupByProcessor();
         $out['GROUP'] = $processor->process($out['GROUP'], isset($out['SELECT']) ? $out['SELECT'] : array());
     }
     if (!empty($out['ORDER'])) {
         // set empty array if we have partial SQL statement
         $processor = new OrderByProcessor();
         $out['ORDER'] = $processor->process($out['ORDER'], isset($out['SELECT']) ? $out['SELECT'] : array());
     }
     if (!empty($out['LIMIT'])) {
         $processor = new LimitProcessor();
         $out['LIMIT'] = $processor->process($out['LIMIT']);
     }
     if (!empty($out['WHERE'])) {
         $processor = new WhereProcessor();
         $out['WHERE'] = $processor->process($out['WHERE']);
     }
     if (!empty($out['HAVING'])) {
         $processor = new HavingProcessor();
         $out['HAVING'] = $processor->process($out['HAVING']);
     }
     if (!empty($out['SET'])) {
         $processor = new SetProcessor();
         $out['SET'] = $processor->process($out['SET'], isset($out['UPDATE']));
     }
     if (!empty($out['DUPLICATE'])) {
         $processor = new DuplicateProcessor();
         $out['ON DUPLICATE KEY UPDATE'] = $processor->process($out['DUPLICATE']);
         unset($out['DUPLICATE']);
     }
     if (!empty($out['INSERT'])) {
         $processor = new InsertProcessor();
         $out = $processor->process($out);
     }
     if (!empty($out['REPLACE'])) {
         $processor = new ReplaceProcessor();
         $out = $processor->process($out);
     }
     if (!empty($out['DELETE'])) {
         $processor = new DeleteProcessor();
         $out = $processor->process($out);
     }
     if (!empty($out['VALUES'])) {
         $processor = new ValuesProcessor();
         $out = $processor->process($out);
     }
     if (!empty($out['INTO'])) {
         $processor = new IntoProcessor();
         $out = $processor->process($out);
     }
     if (!empty($out['DROP'])) {
         $processor = new DropProcessor();
         $out['DROP'] = $processor->process($out['DROP']);
     }
     if (!empty($out['RENAME'])) {
         $processor = new RenameProcessor();
         $out['RENAME'] = $processor->process($out['RENAME']);
     }
     if (!empty($out['SHOW'])) {
         $processor = new ShowProcessor();
         $out['SHOW'] = $processor->process($out['SHOW']);
     }
     return $out;
 }