From fb562dd9b88d5eb17a796f08fffac92160240d1d Mon Sep 17 00:00:00 2001
From: Luc Didry <luc@didry.org>
Date: Sat, 17 Mar 2018 09:56:34 +0100
Subject: [PATCH] [postgresql] Add partial index to speed up some queries

---
 CHANGELOG                           | 3 +++
 lib/Lutim/Plugin/Helpers.pm         | 4 ++--
 utilities/migrations/postgresql.sql | 4 ++++
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index 33413d9..81a71c0 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,8 @@
 Revision history for Lutim
 
+?????  ??????????
+	- PostgreSQL performance improvments
+
 0.9.6  2018-03-12
 	- Update translations
 
diff --git a/lib/Lutim/Plugin/Helpers.pm b/lib/Lutim/Plugin/Helpers.pm
index 8c65680..25c13f3 100644
--- a/lib/Lutim/Plugin/Helpers.pm
+++ b/lib/Lutim/Plugin/Helpers.pm
@@ -18,9 +18,9 @@ sub register {
         # Database migration
         my $migrations = Mojo::Pg::Migrations->new(pg => $app->pg);
         if ($app->mode eq 'development' && $ENV{LUTIM_DEBUG}) {
-            $migrations->from_file('utilities/migrations/postgresql.sql')->migrate(0)->migrate(2);
+            $migrations->from_file('utilities/migrations/postgresql.sql')->migrate(0)->migrate(3);
         } else {
-            $migrations->from_file('utilities/migrations/postgresql.sql')->migrate(2);
+            $migrations->from_file('utilities/migrations/postgresql.sql')->migrate(3);
         }
     } elsif ($app->config('dbtype') eq 'sqlite') {
         # SQLite database migration if needed
diff --git a/utilities/migrations/postgresql.sql b/utilities/migrations/postgresql.sql
index 3d38dd9..1c8cc62 100644
--- a/utilities/migrations/postgresql.sql
+++ b/utilities/migrations/postgresql.sql
@@ -22,3 +22,7 @@ DROP TABLE lutim;
 ALTER TABLE lutim ADD COLUMN iv text;
 -- 2 down
 ALTER TABLE lutim DROP COLUMN iv;
+-- 3 up
+CREATE INDEX IF NOT EXISTS empty_short_idx ON lutim (short) WHERE path IS NULL;
+-- 3 down
+DROP INDEX empty_short_idx;