From 26e7eceefc2afa283c1173cae3f205486b49053e Mon Sep 17 00:00:00 2001
From: Simey Lameze <simey@moodle.com>
Date: Tue, 15 Mar 2016 10:57:03 +0800
Subject: [PATCH] MDL-51374 cache: add temp_tables cache definition

Also a helper method get_temp_tables_cache() has been created for temporary tables cache operations.
---
 lang/en/cache.php           | 1 +
 lib/db/caches.php           | 6 ++++++
 lib/dml/moodle_database.php | 9 +++++++++
 3 files changed, 16 insertions(+)

diff --git a/lang/en/cache.php b/lang/en/cache.php
index 6c34d4706c4..1d21dd09ff4 100644
--- a/lang/en/cache.php
+++ b/lang/en/cache.php
@@ -62,6 +62,7 @@ $string['cachedef_repositories'] = 'Repositories instances data';
 $string['cachedef_search_results'] = 'Search results user data';
 $string['cachedef_string'] = 'Language string cache';
 $string['cachedef_tags'] = 'Tags collections and areas';
+$string['cachedef_temp_tables'] = 'Temporary tables cache';
 $string['cachedef_userselections'] = 'Data used to persist user selections throughout Moodle';
 $string['cachedef_yuimodules'] = 'YUI Module definitions';
 $string['cachelock_file_default'] = 'Default file locking';
diff --git a/lib/db/caches.php b/lib/db/caches.php
index 7f4fc16ae9f..c4cddf309e9 100644
--- a/lib/db/caches.php
+++ b/lib/db/caches.php
@@ -271,4 +271,10 @@ $definitions = array(
         'staticaccelerationsize' => 3
     ),
 
+    // Store temporary tables information.
+    'temp_tables' => array(
+        'mode' => cache_store::MODE_REQUEST,
+        'simplekeys' => true
+    ),
+
 );
diff --git a/lib/dml/moodle_database.php b/lib/dml/moodle_database.php
index 1573ef51d38..3574041e723 100644
--- a/lib/dml/moodle_database.php
+++ b/lib/dml/moodle_database.php
@@ -336,6 +336,15 @@ abstract class moodle_database {
         return cache::make('core', 'databasemeta', $properties);
     }
 
+    /**
+     * Handle the creation and caching of the temporary tables.
+     *
+     * @return cache_application The temp_tables cachestore to complete operations on.
+     */
+    protected function get_temp_tables_cache() {
+        return cache::make('core', 'temp_tables');
+    }
+
     /**
      * Attempt to create the database
      * @param string $dbhost The database host.