anchor.diff:  
   func_alias_clause
      : alias_clause
  -   | AS colid? OPEN_PAREN tablefuncelementlist CLOSE_PAREN
  -   | colid OPEN_PAREN tablefuncelementlist CLOSE_PAREN
  +   | (AS colid? | colid) OPEN_PAREN tablefuncelementlist CLOSE_PAREN
      |
      ;
   
  
positive.code: 
  opt_raise_list
     :
     | COMMA a_expr (COMMA a_expr)*
     ;
  
  opt_raise_using
  
negative.code: 
  
  a_expr_like
     : a_expr_qual_op (NOT? (LIKE | ILIKE | SIMILAR TO | BETWEEN SYMMETRIC?) a_expr_qual_op opt_escape)?
     ;
  /* 8*/
  
  