1 CREATE TABLE mtag_about (
   2         tag big int,
   3         file varchar(80),
   4         function varchar(80),
   5         line integer,
   6         left_name varchar(80),
   7         right_name varchar(80),
   8 
   9         CONSTRAINT mtag_about_row UNIQUE (tag, file, function, line, left_name, right_name)
  10 );