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Orphans are removed without giant lock problems

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This commit is contained in:
Michael Vogel 2016-10-20 22:05:21 +00:00
parent abb827b784
commit fd2d8cc180
4 changed files with 52 additions and 6 deletions
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36
include/dbclean.php
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@ -16,22 +16,48 @@ if(is_null($db)) {
load_config('config');
load_config('system');
update_shadow_copy();
remove_orphans();
killme();
function remove_orphans() {
global $db;
logger("Deleting orphaned data from thread table");
q("DELETE FROM `thread` WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`parent` = `thread`.`iid`)");
if ($db->q("SELECT `iid` FROM `thread` WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`parent` = `thread`.`iid`)", true)) {
logger("found thread orphans: ".$db->num_rows());
while ($orphan = $db->qfetch())
q("DELETE FROM `thread` WHERE `iid` = %d", intval($orphan["iid"]));
}
$db->qclose();
logger("Deleting orphaned data from notify table");
q("DELETE FROM `notify` WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `notify`.`iid`)");
if ($db->q("SELECT `iid` FROM `notify` WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `notify`.`iid`)", true)) {
logger("found notify orphans: ".$db->num_rows());
while ($orphan = $db->qfetch())
q("DELETE FROM `notify` WHERE `iid` = %d", intval($orphan["iid"]));
}
$db->qclose();
logger("Deleting orphaned data from sign table");
q("DELETE FROM `sign` WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `sign`.`iid`)");
if ($db->q("SELECT `iid` FROM `sign` WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `sign`.`iid`)", true)) {
logger("found sign orphans: ".$db->num_rows());
while ($orphan = $db->qfetch())
q("DELETE FROM `sign` WHERE `iid` = %d", intval($orphan["iid"]));
}
$db->qclose();
logger("Deleting orphaned data from term table");
q("DELETE FROM `term` WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `term`.`oid`)");
if ($db->q("SELECT `oid` FROM `term` WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `term`.`oid`)", true)) {
logger("found term orphans: ".$db->num_rows());
while ($orphan = $db->qfetch())
q("DELETE FROM `term` WHERE `oid` = %d", intval($orphan["oid"]));
}
$db->qclose();
// SELECT `id`, `received`, `created`, `guid` FROM `item` WHERE `uid` = 0 AND NOT EXISTS (SELECT `guid` FROM `item` AS `i` WHERE `item`.`guid` = `i`.`guid` AND `i`.`uid` != 0) LIMIT 1;
logger("Done deleting orphaned data from tables");
}