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