X-Git-Url: https://git.cyclocoop.org/%28%28?a=blobdiff_plain;f=maintenance%2Fstorage%2Fblob_tracking.sql;h=fbc407c76a270d286f2fb883aa6bf6bf2bd092fa;hb=02abae3248b9273be6b312aeb9f1cae81a3ac6c0;hp=b136609c9a54aac50082e475e2f162fb7b3f1e18;hpb=0922f54539f9156cfe3b7f972070bbd430fe8e4b;p=lhc%2Fweb%2Fwiklou.git

diff --git a/maintenance/storage/blob_tracking.sql b/maintenance/storage/blob_tracking.sql
index b136609c9a..fbc407c76a 100644
--- a/maintenance/storage/blob_tracking.sql
+++ b/maintenance/storage/blob_tracking.sql
@@ -4,10 +4,14 @@
 CREATE TABLE /*$wgDBprefix*/blob_tracking (
 	-- page.page_id
 	-- This may be zero for orphan or deleted text
+	-- Note that this is for compression grouping only -- it doesn't need to be
+	-- accurate at the time recompressTracked is run. Operations such as a
+	-- delete/undelete cycle may make it inaccurate.
 	bt_page integer not null,
 
 	-- revision.rev_id
 	-- This may be zero for orphan or deleted text
+	-- Like bt_page, it does not need to be accurate when recompressTracked is run.
 	bt_rev_id integer not null,
 
 	-- text.old_id
@@ -50,4 +54,3 @@ CREATE TABLE /*$wgDBprefix*/blob_orphans (
 
 	PRIMARY KEY (bo_cluster, bo_blob_id)
 ) /*$wgDBTableOptions*/;
-