Merge "(bug 41439) Set be as fallback language for be-tarask."

[lhc/web/wiklou.git] / maintenance / archives / patch-linktables.sql

diff --git a/maintenance/archives/patch-linktables.sql b/maintenance/archives/patch-linktables.sql
index 45361e8..d53d2ea 100644 (file)
--- a/maintenance/archives/patch-linktables.sql
+++ b/maintenance/archives/patch-linktables.sql
@@ -4,11 +4,19 @@
 --
 DROP TABLE IF EXISTS /*$wgDBprefix*/links;
 CREATE TABLE /*$wgDBprefix*/links (
-  l_from int(8) unsigned NOT NULL default '0',
-  l_to int(8) unsigned NOT NULL default '0',
+  -- Key to the page_id of the page containing the link.
+  l_from int unsigned NOT NULL default '0',
+
+  -- Key to the page_id of the link target.
+  -- An unfortunate consequence of this is that rename
+  -- operations require changing the links entries for
+  -- all links to the moved page.
+  l_to int unsigned NOT NULL default '0',
+
   UNIQUE KEY l_from(l_from,l_to),
   KEY (l_to)
-);
+
+) /*$wgDBTableOptions*/;
 
 --
 -- Track links to pages that don't yet exist.
@@ -17,11 +25,17 @@ CREATE TABLE /*$wgDBprefix*/links (
 --
 DROP TABLE IF EXISTS /*$wgDBprefix*/brokenlinks;
 CREATE TABLE /*$wgDBprefix*/brokenlinks (
-  bl_from int(8) unsigned NOT NULL default '0',
+  -- Key to the page_id of the page containing the link.
+  bl_from int unsigned NOT NULL default '0',
+
+  -- Text of the target page title ("namesapce:title").
+  -- Unfortunately this doesn't split the namespace index
+  -- key and therefore can't easily be joined to anything.
   bl_to varchar(255) binary NOT NULL default '',
   UNIQUE KEY bl_from(bl_from,bl_to),
   KEY (bl_to)
-);
+
+) /*$wgDBTableOptions*/;
 
 --
 -- Track links to images *used inline*
@@ -30,11 +44,18 @@ CREATE TABLE /*$wgDBprefix*/brokenlinks (
 --
 DROP TABLE IF EXISTS /*$wgDBprefix*/imagelinks;
 CREATE TABLE /*$wgDBprefix*/imagelinks (
-  il_from int(8) unsigned NOT NULL default '0',
+  -- Key to page_id of the page containing the image / media link.
+  il_from int unsigned NOT NULL default '0',
+
+  -- Filename of target image.
+  -- This is also the page_title of the file's description page;
+  -- all such pages are in namespace 6 (NS_FILE).
   il_to varchar(255) binary NOT NULL default '',
+
   UNIQUE KEY il_from(il_from,il_to),
   KEY (il_to)
-);
+
+) /*$wgDBTableOptions*/;
 
 --
 -- Stores (possibly gzipped) serialized objects with
@@ -45,4 +66,5 @@ DROP TABLE IF EXISTS /*$wgDBprefix*/linkscc;
 CREATE TABLE /*$wgDBprefix*/linkscc (
   lcc_pageid INT UNSIGNED NOT NULL UNIQUE KEY,
   lcc_cacheobj MEDIUMBLOB NOT NULL
-);
+
+) /*$wgDBTableOptions*/;