anchor.diff:  sampleType
       : BERNOULLI
       | SYSTEM
  -    | POISSONIZED
       ;
   
   aliasedRelation
  
positive.code: OVER: 'OVER';
  PARTITION: 'PARTITION';
  PARTITIONS: 'PARTITIONS';
  POISSONIZED: 'POISSONIZED';
  POSITION: 'POSITION';
  PRECEDING: 'PRECEDING';
  PREPARE: 'PREPARE';
  
negative.code:     | MAP | MINUTE | MONTH
      | NFC | NFD | NFKC | NFKD | NO | NULLIF | NULLS
      | ONLY | OPTION | ORDINALITY | OUTPUT | OVER
      | PARTITION | PARTITIONS | POSITION | PRECEDING | PRIVILEGES | PROPERTIES | PUBLIC
      | RANGE | READ | RENAME | REPEATABLE | REPLACE | RESET | RESTRICT | REVOKE | ROLLBACK | ROW | ROWS
      | SCHEMA | SCHEMAS | SECOND | SERIALIZABLE | SESSION | SET | SETS
      | SHOW | SMALLINT | SOME | START | STATS | SUBSTRING | SYSTEM
  