Database tables to cache expensive query data

We need to bundle counts of notices and users by date. This can be
expensive for large sites. So, new tables are added to cache the
results of these queries, which don't change after the date is over.

1 files changed, 36 insertions, 0 deletions

diff --git a/plugins/Sitemap/SitemapPlugin.php b/plugins/Sitemap/SitemapPlugin.php
index 6fc702104..831694efc 100644
--- a/plugins/Sitemap/SitemapPlugin.php
+++ b/plugins/Sitemap/SitemapPlugin.php
@@ -121,4 +121,40 @@ class SitemapPlugin extends Plugin
                           'index' => '[1-9][0-9]*'));
         return true;
     }
+
+    /**
+     * Database schema setup
+     *
+     * We cache some data persistently to avoid overlong queries.
+     *
+     * @see Sitemap_user_count
+     * @see Sitemap_notice_count
+     *
+     * @return boolean hook value; true means continue processing, false means stop.
+     */
+
+    function onCheckSchema()
+    {
+        $schema = Schema::get();
+
+        // For storing user-submitted flags on profiles
+
+        $schema->ensureTable('sitemap_user_count',
+                             array(new ColumnDef('registration_date', 'date', null,
+                                                 true, 'PRI'),
+                                   new ColumnDef('user_count', 'integer'),
+                                   new ColumnDef('created', 'datetime',
+                                                 null, false),
+                                   new ColumnDef('modified', 'timestamp')));
+
+        $schema->ensureTable('sitemap_notice_count',
+                             array(new ColumnDef('notice_date', 'date', null,
+                                                 true, 'PRI'),
+                                   new ColumnDef('notice_count', 'integer'),
+                                   new ColumnDef('created', 'datetime',
+                                                 null, false),
+                                   new ColumnDef('modified', 'timestamp')));
+
+        return true;
+    }
 }