✨ index posts_gdocs.updatedAt

[ikesau]

I was encountering issues where the GdocsIndexPage wasn't loading for me due to an MySQL sort_buffer overflow:

{
  "code": "ER_OUT_OF_SORTMEMORY",
  "errno": 1038,
  "sqlMessage": "Out of sort memory, consider increasing server sort buffer size",
  "sqlState": "HY001",
  "index": 0
}

 SELECT `Gdoc`.`id`                     AS `Gdoc_id`,
       `Gdoc`.`slug`                    AS `Gdoc_slug`,
       `Gdoc`.`content`                 AS `Gdoc_content`,
       `Gdoc`.`published`               AS `Gdoc_published`,
       `Gdoc`.`publicationcontext`      AS `Gdoc_publicationContext`,
       `Gdoc`.`createdat`               AS `Gdoc_createdAt`,
       `Gdoc`.`publishedat`             AS `Gdoc_publishedAt`,
       `Gdoc`.`updatedat`               AS `Gdoc_updatedAt`,
       `Gdoc`.`revisionid`              AS `Gdoc_revisionId`,
       `Gdoc`.`breadcrumbs`             AS `Gdoc_breadcrumbs`,
       `Gdoc__Gdoc_tags`.`id`           AS `Gdoc__Gdoc_tags_id`,
       `Gdoc__Gdoc_tags`.`name`         AS `Gdoc__Gdoc_tags_name`,
       `Gdoc__Gdoc_tags`.`createdat`    AS `Gdoc__Gdoc_tags_createdAt`,
       `Gdoc__Gdoc_tags`.`updatedat`    AS `Gdoc__Gdoc_tags_updatedAt`,
       `Gdoc__Gdoc_tags`.`parentid`     AS `Gdoc__Gdoc_tags_parentId`,
       `Gdoc__Gdoc_tags`.`isbulkimport` AS `Gdoc__Gdoc_tags_isBulkImport`,
       `Gdoc__Gdoc_tags`.`specialtype`  AS `Gdoc__Gdoc_tags_specialType`
FROM   `posts_gdocs` `Gdoc`
       LEFT JOIN `posts_gdocs_x_tags` `Gdoc_Gdoc__Gdoc_tags`
              ON `Gdoc_Gdoc__Gdoc_tags`.`gdocid` = `Gdoc`.`id`
       LEFT JOIN `tags` `Gdoc__Gdoc_tags`
              ON `Gdoc__Gdoc_tags`.`id` = `Gdoc_Gdoc__Gdoc_tags`.`tagid`
ORDER  BY `Gdoc`.`updatedat` DESC  

Adding this index may help fix the problem, though I still intermittently get the issue.

In either case, it's a good idea to index this column seeing as we do an ORDER BY on it, but I'll wait to see if there are further optimizations we should make before committing anything.