anchor.diff:  // SqlPlus
   
   sql_plus_command 
  -    : ('/' | whenever_command | exit_command | prompt_command | set_command | show_errors_command) ';'?
  +    : ('/' | whenever_command | exit_command | prompt_command | set_command | show_errors_command | start_command) ';'?
       ;
   
   whenever_command
  
positive.code:     : 'prompt' SPACE ( ~('\r' | '\n') )* (NEWLINE|EOF)
      ;
  
  //{ Rule #360 <NEWLINE>
  fragment
  NEWLINE: '\r'? '\n';
  
negative.code: 
  sequence_start_clause
      : START WITH UNSIGNED_INTEGER
      ;
  
  // $<Table DDL Clauses
  
  create_table
      : CREATE TABLE tableview_name LEFT_PAREN column_name datatype (COMMA column_name datatype)* RIGHT_PAREN
      ;
  
  drop_table
      : DROP TABLE tableview_name
      ;
  
  // $<Anonymous PL/SQL code block
  
  anonymous_block
      : BEGIN seq_of_statements END SEMICOLON
      ;
  
  // $<Common DDL Clauses
  