13.5. Changing the Index Sort Order

By default, indexes are sorted alphabetically, in descending ASCII order. This is true for every attribute, even attributes which may have numeric attribute values like Integer or TelephoneNumber. It is possible to change the sort method by changing the matching rule set for the attribute.

13.5.1. Changing the Sort Order Using the Command Line

To change the sort order using the command line, change the nsMatchingRule for the attribute index. For example:
# ldapmodify -D "cn=Directory Manager" -W -x

dn: cn=sn,cn=index,cn=Example1,cn=ldbm database,cn=plugins,cn=config
changetype:modify
replace:nsMatchingRule
nsMatchingRule: integerOrderingMatch