anchor.diff:      ;
   
   alterTable
  -    : ALTER TABLE tableName alterClause_?
  +    : ALTER TABLE tableName alterDefinitionClause_?
       ;
   
   dropTable
  -    : DROP TEMPORARY? TABLE (IF EXISTS)? tableName (COMMA_ tableName)*
  +    : DROP dropTableSpecification_ TABLE tableExistClause_ tableNames
       ;
   
   dropIndex
  
positive.code:     : (UNIQUE | FULLTEXT | SPATIAL)?
      ;
  
  alterClause_
      : alterSpecification_ (COMMA_ alterSpecification_)*
      ;
  
  
negative.code: subpartitionDefinition_
      : SUBPARTITION identifier_ partitionDefinitionOption_*
      ;
  
  dropTableSpecification_
      : TEMPORARY?
      ;
  
  tableExistClause_
      : (IF EXISTS)?
      ;