anchor.diff:  /* Will visit later
   database_mirroring_option:
        ALTER DATABASE Database Mirroring
  -    ;
  -*/
  -
  -date_correlation_optimization_option:
  +    ; */
  +
  +
  +/*date_correlation_optimization_option:
       DATE_CORRELATION_OPTIMIZATION on_off
       ;
   
  
positive.code: 
  parameterization_option:
       PARAMETERIZATION ( SIMPLE | FORCED )
      ;
  
  /* Will visit later
  query_store_options:
      ;
  */
  
  recovery_option:
       RECOVERY ( FULL | BULK_LOGGED | SIMPLE )
       | TORN_PAGE_DETECTION on_off
       | PAGE_VERIFY ( CHECKSUM | TORN_PAGE_DETECTION | NONE )
      ;
  
  /*Will visit later
  remote_data_archive_option:
      ;
  */
  
  service_broker_option:
      ENABLE_BROKER  
      | DISABLE_BROKER  
      | NEW_BROKER  
  
negative.code:     ;
  
  sql_clause
      : dml_clause/*
      | ddl_clause
      | cfl_statement
      | another_statement*/
      ;
  
  // Data Manipulation Language: https://msdn.microsoft.com/en-us/library/ff848766(v=sql.120).aspx
  dml_clause
      : /*delete_statement
      | insert_statement
      | */select_statement/*
      | update_statement
      */;/*
  
  // Data Definition Language: https://msdn.microsoft.com/en-us/library/ff848799.aspx)
  ddl_clause
  