diff --git a/db/migrate/20141126140434_add_serial_to_zonefile_procedure.rb b/db/migrate/20141126140434_add_serial_to_zonefile_procedure.rb
new file mode 100644
index 000000000..d02270e39
--- /dev/null
+++ b/db/migrate/20141126140434_add_serial_to_zonefile_procedure.rb
@@ -0,0 +1,120 @@
+class AddSerialToZonefileProcedure < ActiveRecord::Migration
+  # rubocop:disable Metrics/MethodLength
+  def up
+    execute <<-SQL
+      CREATE OR REPLACE FUNCTION generate_zonefile(i_origin varchar)
+      RETURNS text AS $$
+      DECLARE
+        zone_header text := concat('$ORIGIN ', i_origin, '.');
+        serial_num varchar;
+        include_filter varchar := '';
+        exclude_filter varchar := '';
+        ns_records text := '';
+        a_records text := '';
+        a4_records text := '';
+        ds_records text := '';
+      BEGIN
+        -- define filters
+        include_filter = '%' || i_origin;
+
+        -- for %.%.%
+        IF i_origin ~ '\\.' THEN
+          exclude_filter := '';
+        -- for %.%
+        ELSE
+          exclude_filter := '%.%.' || i_origin;
+        END IF;
+
+        SELECT ROUND(extract(epoch from now() at time zone 'utc')) INTO serial_num;
+
+        -- zonefile header
+        SELECT concat(
+          format('%-10s', '$ORIGIN'), i_origin, '.', chr(10),
+          format('%-10s', '$TTL'), zf.ttl, chr(10), chr(10),
+          format('%-10s', i_origin || '.'), 'IN SOA ', zf.master_nameserver, '. ', zf.email, '. (', chr(10),
+          format('%-17s', ''), format('%-12s', serial_num), '; serial number', chr(10),
+          format('%-17s', ''), format('%-12s', zf.refresh), '; refresh, seconds', chr(10),
+          format('%-17s', ''), format('%-12s', zf.retry), '; retry, seconds', chr(10),
+          format('%-17s', ''), format('%-12s', zf.expire), '; expire, seconds', chr(10),
+          format('%-17s', ''), format('%-12s', zf.minimum_ttl), '; minimum TTL, seconds', chr(10),
+          format('%-17s', ''), ')'
+        ) FROM zonefile_settings zf WHERE i_origin = zf.origin INTO zone_header;
+
+        -- ns records
+        SELECT array_to_string(
+          array(
+            SELECT concat(d.name, '. IN NS ', ns.hostname, '.')
+            FROM domains d
+            JOIN nameservers ns ON ns.domain_id = d.id
+            WHERE d.name LIKE include_filter AND d.name NOT LIKE exclude_filter
+            ORDER BY
+            CASE d.name
+              WHEN i_origin THEN 1
+            END
+          ),
+          chr(10)
+        ) INTO ns_records;
+
+        -- a records
+        SELECT array_to_string(
+          array(
+            SELECT concat(cns.hostname, '. IN A ', cns.ipv4, '.') FROM cached_nameservers cns WHERE EXISTS (
+              SELECT 1
+              FROM nameservers ns
+              JOIN domains d ON d.id = ns.domain_id
+              WHERE d.name LIKE include_filter AND d.name NOT LIKE exclude_filter
+              AND ns.hostname = cns.hostname AND ns.ipv4 = cns.ipv4 AND ns.ipv6 = cns.ipv6
+              AND ns.ipv4 IS NOT NULL AND ns.ipv4 <> ''
+            )
+          ),
+          chr(10)
+        ) INTO a_records;
+
+        -- aaaa records
+        SELECT array_to_string(
+          array(
+            SELECT concat(cns.hostname, '. IN AAAA ', cns.ipv6, '.') FROM cached_nameservers cns WHERE EXISTS (
+              SELECT 1
+              FROM nameservers ns
+              JOIN domains d ON d.id = ns.domain_id
+              WHERE d.name LIKE include_filter AND d.name NOT LIKE exclude_filter
+              AND ns.hostname = cns.hostname AND ns.ipv6 = cns.ipv6 AND ns.ipv6 = cns.ipv6
+              AND ns.ipv6 IS NOT NULL AND ns.ipv6 <> ''
+            )
+          ),
+          chr(10)
+        ) INTO a4_records;
+
+        -- ds records
+        SELECT array_to_string(
+          array(
+            SELECT concat(
+              d.name, '. 86400 IN DS ', dk.ds_key_tag, ' ',
+              dk.ds_alg, ' ', dk.ds_digest_type, ' ', dk.ds_digest
+            )
+            FROM domains d
+            JOIN dnskeys dk ON dk.domain_id = d.id
+            WHERE d.name LIKE include_filter AND d.name NOT LIKE exclude_filter
+            ),
+          chr(10)
+        ) INTO ds_records;
+
+        RETURN concat(
+          zone_header, chr(10), chr(10),
+          '; Zone NS Records', chr(10), ns_records, chr(10), chr(10),
+          '; Zone A Records', chr(10), a_records, chr(10), chr(10),
+          '; Zone AAAA Records', chr(10), a4_records, chr(10), chr(10),
+          '; Zone DS Records', chr(10), ds_records
+        );
+      END;
+      $$
+      LANGUAGE plpgsql;
+    SQL
+  end
+
+  def down
+    execute <<-SQL
+      DROP FUNCTION generate_zonefile(i_origin varchar);
+    SQL
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index ec3684f36..c0d21071d 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20141125111414) do
+ActiveRecord::Schema.define(version: 20141126140434) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"