anchor.diff:  import Symbol, Keyword, Literals, BaseRule;
   
   createTable
  -    : CREATE createTableSpecification_ TABLE notExistClause_ tableName (createDefinitionClause_ | createLikeClause_)
  +    : CREATE createTableSpecification_ TABLE tableNotExistClause_ tableName (createDefinitionClause_ | createLikeClause_)
       ;
   
   createIndex
  
positive.code: createIndexSpecification_
      : (UNIQUE | FULLTEXT | SPATIAL)?
      ;
  
  
  
  
negative.code:     : TEMPORARY?
      ;
  
  tableNotExistClause_
      : (IF NOT EXISTS)?
      ;
  
  