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   1  -- New field in archive table to preserve text source IDs across undeletion.
   2  --
   3  -- Older entries containing NULL in this field will contain text in the
   4  -- ar_text and ar_flags fields, and will cause the (re)creation of a new
   5  -- text record upon undeletion.
   6  --
   7  -- Newer ones will reference a text.old_id with this field, and the existing
   8  -- entries will be used as-is; only a revision record need be created.
   9  --
  10  -- Added 2005-05-01
  11  
  12  ALTER TABLE /*$wgDBprefix*/archive
  13    ADD
  14      ar_text_id int unsigned;