anchor.diff:  import Symbol, Keyword, Literals, BaseRule;
   
   createTable
  -    : CREATE createSpecification_ TABLE tableName createDefinitionClause_
  +    : CREATE createTableSpecification_ TABLE tableName createDefinitionClause_
       ;
   
   createIndex
  -    : CREATE (UNIQUE | BITMAP)? INDEX indexName ON (tableIndexClause_ | bitmapJoinIndexClause_)
  +    : CREATE createIndexSpecification_ INDEX indexName ON (tableIndexClause_ | bitmapJoinIndexClause_)
       ;
   
   alterTable
  
positive.code:     | (CONSTRAINT ignoredIdentifier_)? FOREIGN KEY lobItemList referencesClause constraintState*
      ;
  
  tableProperties
      : columnProperties? (AS unionSelect)?
      ;
  
negative.code:     : ELEMENT? IS OF TYPE? LP_ ONLY? dataTypeName_ RP_ | NOT? SUBSTITUTABLE AT ALL LEVELS
      ;
  
  