From c2fb97d586e8a2f4383823a36361207285d94d4d Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Sat, 1 Sep 2018 20:05:30 +0200
Subject: lib/mysql-functions: exit early from mysql_sort_versions() if all
 versions are ordered already

---
 lib/mysql-functions | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/lib/mysql-functions b/lib/mysql-functions
index 9fe0984..c0f7790 100755
--- a/lib/mysql-functions
+++ b/lib/mysql-functions
@@ -1179,14 +1179,28 @@ mysql_update_versions_ordering() {
   )
 }
 
-# mysql_sort_versions
-# sort the table of versions
+# mysql_sort_versions [-f]
+# sort the table of versions, iff versions without order exist or -f was
+# given
+
 mysql_sort_versions() {
   ( # new shell is intentional
     tmp_file=$(
       mktemp "tmp.mysql_sort_versions.XXXXXXXXXX" --tmpdir
     )
     trap 'rm "${tmp_file}"' EXIT
+    if [ "x$1" != 'x-f' ] && \
+      {
+        printf 'SELECT'
+        printf ' COUNT(1)'
+        printf ' FROM `versions`'
+        printf ' WHERE `versions`.`order` IS NULL'
+      } | \
+        mysql_run_query | \
+        grep -qxF '0'; then
+      # nothing to do
+      return 0
+    fi
     {
       printf 'SELECT '
       printf '`versions`.`%s`,' \
-- 
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