Question

I have a table on a remote server that stores version numbers for our client side software. I use SOAP to handle requests. The client software sends a version number and I need to use SQL to find the next version numbers.

Here’s the SQL that I use. I’m having a bit of a bad brain day, and I know this isn’t correct but I can’t seem to figure out what I need to do.

The create table code:

CREATE TABLE IF NOT EXISTS `sqlUpdateVersions` (
  `primary_key` int(11) NOT NULL AUTO_INCREMENT,
  `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `comment` text NOT NULL,
  `majorVS` tinyint(4) NOT NULL,
  `minorVS` tinyint(4) NOT NULL,
  `revisionVS` tinyint(4) NOT NULL,
  `buildVS` tinyint(4) NOT NULL,
  `filePK` int(11) NOT NULL,
  `customDBJarPK` int(11) DEFAULT NULL,
  PRIMARY KEY (`primary_key`),
  KEY `filePK` (`filePK`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=9 ;

This is the SQL query to find a version #. I dumped in this version 1.1.0.0

select b.majorVS, b.minorVS,b.revisionVS, b.buildVS
 from sqlUpdateVersions b  where
 b.majorVS>=1 AND b.minorVS >=1 AND b.revisionVS>=0 AND b.buildVS>=10 
 ORDER BY b.majorVS,b.minorVS,b.revisionVS, b.buildVS

Now clearly I can tell this SQL is problematic. But how would I structure one that would return the next values, say 1.2.0.0 or 1.1.1.0

Thanks.

Answer 1

Here is a brute force approach:

select suv.*
from sqlUpdateVersions suv
where suv.majorVS > 1 or
      (suv.MajorVs = 1 and suv.minorVS > 1) or
      (suv.MajorVS = 1 and suv.minorVS = 1 and suv.revisionVS > 0) or
      (suv.MajorVS = 1 and suv.minorVS = 1 and suv.revisionVS = 0 and suv.buildVS > 10)
order by suv.MajorVS, suv.MinorVS, suv.revisionVS, suv.buildVS

You can also convert the versions to a bigint and do the comparison directly:

select suv.*
from (select suv.*,
             buildVS + (cast(1000 as bigint)*revisionVS +
                        (cast(1000 as bigint)*minorVS +
                         (cast(1000 as bigint)*majorVS
                         )
                        )
                       ) as bigVersion 
      from sqlUpdateVersions suv
     ) suv
 where bigversion > 1001000010