read-tests work also for ibmdb2

tests/data/slapd-sql.conf

@@ -54,6 +54,12 @@ dbpasswd        secret
 #
 # rdbms specific directives
 #
+# IBM db2
+#ibmdb2#upper_func      	"ucase"
+#ibmdb2#upper_needs_cast	"yes"
+#ibmdb2#concat_pattern  	"?||?"
+#ibmdb2#children_cond		"ucase(ldap_entries.dn)=ucase(cast(? as varchar(255)))"
+#
 # PostgreSQL
 #postgres#insentry_query  "insert into ldap_entries (id,dn,oc_map_id,parent,keyval) values ((select case when max(id) is null then 1 else max(id) + 1 end from ldap_entries),?,?,?,?)"
 #postgres#upper_func      "upper"