Add stub schema_version table

classes/Schema_version.php

@@ -0,0 +1,22 @@
+<?php
+/**
+ * Table Definition for schema_version
+ */
+
+class Schema_version extends Memcached_DataObject
+{
+    ###START_AUTOCODE
+    /* the code below is auto generated do not remove the above tag */
+
+    public $__table = 'schema_version';      // table name
+    public $table_name;                      // varchar(64)  primary_key not_null
+    public $checksum;                        // varchar(64)  not_null
+    public $modified;                        // datetime()   not_null
+
+    /* Static get */
+    function staticGet($k,$v=null)
+    { return Memcached_DataObject::staticGet('Schema_version',$k,$v); }
+
+    /* the code above is auto generated do not remove the tag below */
+    ###END_AUTOCODE
+}

classes/statusnet.ini

@@ -497,6 +497,14 @@ replied_id = 1
 notice_id = K
 profile_id = K
 
+[schema_version]
+table_name = 130
+checksum = 130
+modified = 384
+
+[schema_version__keys]
+table_name = K
+
 [session]
 id = 130
 session_data = 34

db/core.php

@@ -1012,3 +1012,13 @@ $schema['user_urlshortener_prefs'] = array(
         'user_urlshortener_prefs_user_id_fkey' => array('user', array('user_id' => 'id')),
     ),
 );
+
+$schema['schema_version'] = array(
+    'description' => 'To avoid checking database structure all the time, we store a checksum of the expected schema info for each table here. If it has not changed since the last time we checked the table, we can leave it as is.',
+    'fields' => array(
+        'table_name' => array('type' => 'varchar', 'length' => '64', 'not null' => true, 'description' => 'Table name'),
+        'checksum' => array('type' => 'varchar', 'length' => '64', 'not null' => true, 'description' => 'Checksum of schema array; a mismatch indicates we should check the table more thoroughly.'),
+        'modified' => array('type' => 'datetime', 'not null' => true, 'description' => 'date this record was modified'),
+    ),
+    'primary key' => array('table_name'),
+);