CREATE TABLE java_store(
  java_store_id int NOT NULL AUTO_INCREMENT,
  file_name VARCHAR(256) NOT NULL,
  version_id int NOT NULL,
  save_time  TIMESTAMP NOT NULL,
  this_version TEXT NOT NULL,
  notes VARCHAR(512),
  PRIMARY KEY (java_store_id)
)

select count(*) into @jscount from java_store where file_name=@class_name;
insert into java_store (file_name, version_id, save_time,this_version,notes)
   values(@class_name,(@jscount+1),NOW(),"public class my()...","just a test");

new_version.sql

delimiter //
create procedure new_version(in class_name VARCHAR(256),in the_version TEXT, in the_notes VARCHAR(512))
begin
select count(*) into @jscount from java_store where file_name=class_name;
insert into java_store (file_name, version_id, save_time,this_version,notes)
   values(class_name,(@jscount+1),NOW(),the_version,the_notes);
end;
//
delimiter ;