[#1574] add one comment

diff --git a/src/bin/admin/tests/pgsql_tests.sh.in b/src/bin/admin/tests/pgsql_tests.sh.in
index bc8c2d3412029c1214b39a669f15339a2ec7460d..aeadeae875b7d6fc97ed5df3209fd1a8d2b57172 100644 (file)
--- a/src/bin/admin/tests/pgsql_tests.sh.in
+++ b/src/bin/admin/tests/pgsql_tests.sh.in
@@ -44,7 +44,7 @@ kea_admin="@abs_top_builddir@/src/bin/admin/kea-admin"
 run_statement() {
     hdr="$1";shift
     qry="$1";shift
-    exp_value="${1-}"
+    exp_value="${1-}" # Optional value. If not given, replace with empty string.
 
     # Execute the statment
     run_and_return_output_and_exit_code \