Re: sorting/comparing column values in non-alphanumeric sorting ways ?

2018-07-11 Thread Peter Geoghegan
On Wed, Jul 11, 2018 at 2:44 PM, David Gauthier wrote: > I want to load the 'highestver' column with the highest version of tcfg1-3. > > This won't work... > update tv set greatest = greatest(tcfg1,tcfg2,tcfg3) > ...because it thinks 1.0.9 is greater than 1.0.10 > > Is there a way to get this to

Re: sorting/comparing column values in non-alphanumeric sorting ways ?

2018-07-11 Thread David G. Johnston
On Wednesday, July 11, 2018, David Gauthier wrote: > > This won't work... > update tv set greatest = greatest(tcfg1,tcfg2,tcfg3) > ...because it thinks 1.0.9 is greater than 1.0.10 > > Is there a way to get this to work right ? > > Haven't used it personally but this seems promising:

sorting/comparing column values in non-alphanumeric sorting ways ?

2018-07-11 Thread David Gauthier
Hi: I have a table listing tools and tool versions for a number of different tool configurations. Something like this... create table tv (tool text, tcfg1 test, tcfg2 text, tcfg3 text, highestver text); insert into tv (tool,tcfg1mtcfg2,tcfg3) values ('tool_a','1.0.5b','1.0.10','1.0.9'); I