text: CREATE TABLE /*_*/text_tmp (
    -- Unique text storage key number.
    -- Note that the 'oldid' parameter used in URLs does *not*
    -- refer to this number anymore, but to rev_id.
    --
    -- revision.rev_text_id is a key to this column
    old_id int unsigned NOT NULL PRIMARY KEY AUTO_INCREMENT,
  
    -- Depending on the contents of the old_flags field, the text
    -- may be convenient plain text, or it may be funkily encoded.
    old_text mediumblob NOT NULL,
  
    -- Comma-separated list of flags:
    -- gzip: text is compressed with PHP's gzdeflate() function.
    -- utf-8: text was stored as UTF-8.
    --        If $wgLegacyEncoding option is on, rows *without* this flag
    --        will be converted to UTF-8 transparently at load time. Note
    --        that due to a bug in a maintenance script, this flag may
    --        have been stored as 'utf8' in some cases (T18841).
    -- object: text field contained a serialized PHP object.
    --         The object either contains multiple versions compressed
    --         together to achieve a better compression ratio, or it refers
    --         to another row where the text can be found.
    -- external: text was stored in an external location specified by old_text.
    --           Any additional flags apply to the data stored at that URL, not
    --           the URL itself. The 'object' flag is *not* set for URLs of the
    --           form 'DB://cluster/id/itemid', because the external storage
    --           system itself decompresses these.
    old_flags tinyblob NOT NULL
  ) /*$wgDBTableOptions*/ MAX_ROWS=10000000 AVG_ROW_LENGTH=10240;
  
  INSERT INTO /*_*/text_tmp
  	SELECT * FROM /*_*/text;
  
  DROP TABLE /*_*/text;
  
  ALTER TABLE /*_*/text_tmp RENAME TO /*_*/text;