Question

I’m not sure if this is specific question for Cassandra or this can also belong to PHP so I’m sorry for tagging PHP.

So basically i’m ordering some long row columns by their column names, which goes like this:

2012-01-01_aa_99999  |  2012-01-01_aaa  |  2012-01-12_aaaaa

So this is working the way i want it to work, but i don’t understand how does it actually order those string.

What is not clear to me is that first string 2012-01-01_aa_99999 seems to be way bigger then the rest two, and i’m concerned that at some point it might ignore first part of the string which is a date and put some string where they shouldn’t belong.

In my case those string consist of quite a few parts so i’m really concerned about this, so basically i need some explanation how does this ordering happens internally.

Answer 1

i don’t understand how does it actually order those string.

The strings you provided appear to be lexicographically ordered.