anchor.diff:      | MAP | MINUTE | MONTH
       | NFC | NFD | NFKC | NFKD | NO | NULLIF | NULLS
       | ONLY | OPTION | ORDINALITY | OUTPUT | OVER
  -    | PARTITION | PARTITIONS | POISSONIZED | POSITION | PRECEDING | PRIVILEGES | PROPERTIES | PUBLIC
  +    | 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
  
positive.code: sampleType
      : BERNOULLI
      | SYSTEM
      | POISSONIZED
      ;
  
  aliasedRelation
  
negative.code: OVER: 'OVER';
  PARTITION: 'PARTITION';
  PARTITIONS: 'PARTITIONS';
  POSITION: 'POSITION';
  PRECEDING: 'PRECEDING';
  PREPARE: 'PREPARE';
  