friendica/include/dbclean.php

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<?php
/**
* @file include/dbclean.php
* @brief The script is called from time to time to clean the database entries and remove orphaned data.
*/
use Friendica\Core\Config;
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function dbclean_run(&$argv, &$argc) {
if (!Config::get('system', 'dbclean', false)) {
return;
}
if ($argc == 2) {
$stage = intval($argv[1]);
} else {
$stage = 0;
}
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if ($stage == 0) {
for ($i = 1; $i <= 7; $i++) {
if (!Config::get('system', 'finished-dbclean-'.$i)) {
proc_run(PRIORITY_LOW, 'include/dbclean.php', $i);
}
}
} else {
remove_orphans($stage);
}
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}
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/**
* @brief Remove orphaned database entries
*/
function remove_orphans($stage = 0) {
global $db;
$count = 0;
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// We split the deletion in many small tasks
$limit = 1000;
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if ($stage == 1) {
logger("Deleting old global item entries from item table without user copy");
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$r = dba::p("SELECT `id` FROM `item` WHERE `uid` = 0
AND NOT EXISTS (SELECT `guid` FROM `item` AS `i` WHERE `item`.`guid` = `i`.`guid` AND `i`.`uid` != 0)
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AND `received` < UTC_TIMESTAMP() - INTERVAL 90 DAY LIMIT ".intval($limit));
$count = dba::num_rows($r);
if ($count > 0) {
logger("found global item orphans: ".$count);
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while ($orphan = dba::fetch($r)) {
dba::delete('item', array('id' => $orphan["id"]));
}
} else {
logger("No global item orphans found");
// We will eventually set this value when we found a good way to delete these items in another way.
// Config::set('system', 'finished-dbclean-1', true);
}
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dba::close($r);
logger("Done deleting ".$count." old global item entries from item table without user copy");
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} elseif ($stage == 2) {
logger("Deleting items without parents");
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$r = dba::p("SELECT `id` FROM `item` WHERE NOT EXISTS (SELECT `id` FROM `item` AS `i` WHERE `item`.`parent` = `i`.`id`) LIMIT ".intval($limit));
$count = dba::num_rows($r);
if ($count > 0) {
logger("found item orphans without parents: ".$count);
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while ($orphan = dba::fetch($r)) {
dba::delete('item', array('id' => $orphan["id"]));
}
} else {
logger("No item orphans without parents found");
Config::set('system', 'finished-dbclean-2', true);
}
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dba::close($r);
logger("Done deleting ".$count." items without parents");
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} elseif ($stage == 3) {
logger("Deleting orphaned data from thread table");
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$r = dba::p("SELECT `iid` FROM `thread` WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`parent` = `thread`.`iid`) LIMIT ".intval($limit));
$count = dba::num_rows($r);
if ($count > 0) {
logger("found thread orphans: ".$count);
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while ($orphan = dba::fetch($r)) {
dba::delete('thread', array('iid' => $orphan["iid"]));
}
} else {
logger("No thread orphans found");
Config::set('system', 'finished-dbclean-3', true);
}
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dba::close($r);
logger("Done deleting ".$count." orphaned data from thread table");
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} elseif ($stage == 4) {
logger("Deleting orphaned data from notify table");
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$r = dba::p("SELECT `iid` FROM `notify` WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `notify`.`iid`) LIMIT ".intval($limit));
$count = dba::num_rows($r);
if ($count > 0) {
logger("found notify orphans: ".$count);
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while ($orphan = dba::fetch($r)) {
dba::delete('notify', array('iid' => $orphan["iid"]));
}
} else {
logger("No notify orphans found");
Config::set('system', 'finished-dbclean-4', true);
}
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dba::close($r);
logger("Done deleting ".$count." orphaned data from notify table");
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} elseif ($stage == 5) {
logger("Deleting orphaned data from notify-threads table");
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$r = dba::p("SELECT `id` FROM `notify-threads` WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`parent` = `notify-threads`.`master-parent-item`) LIMIT ".intval($limit));
$count = dba::num_rows($r);
if ($count > 0) {
logger("found notify-threads orphans: ".$count);
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while ($orphan = dba::fetch($r)) {
dba::delete('notify-threads', array('id' => $orphan["id"]));
}
} else {
logger("No notify-threads orphans found");
Config::set('system', 'finished-dbclean-5', true);
}
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dba::close($r);
logger("Done deleting ".$count." orphaned data from notify-threads table");
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} elseif ($stage == 6) {
logger("Deleting orphaned data from sign table");
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$r = dba::p("SELECT `iid` FROM `sign` WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `sign`.`iid`) LIMIT ".intval($limit));
$count = dba::num_rows($r);
if ($count > 0) {
logger("found sign orphans: ".$count);
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while ($orphan = dba::fetch($r)) {
dba::delete('sign', array('iid' => $orphan["iid"]));
}
} else {
logger("No sign orphans found");
Config::set('system', 'finished-dbclean-6', true);
}
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dba::close($r);
logger("Done deleting ".$count." orphaned data from sign table");
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} elseif ($stage == 7) {
logger("Deleting orphaned data from term table");
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$r = dba::p("SELECT `oid` FROM `term` WHERE NOT EXISTS (SELECT `id` FROM `item` WHERE `item`.`id` = `term`.`oid`) LIMIT ".intval($limit));
$count = dba::num_rows($r);
if ($count > 0) {
logger("found term orphans: ".$count);
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while ($orphan = dba::fetch($r)) {
dba::delete('term', array('oid' => $orphan["oid"]));
}
} else {
logger("No term orphans found");
Config::set('system', 'finished-dbclean-7', true);
}
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dba::close($r);
logger("Done deleting ".$count." orphaned data from term table");
}
// Call it again if not all entries were purged
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if (($stage != 0) AND ($count > 0)) {
proc_run(PRIORITY_MEDIUM, 'include/dbclean.php');
}
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}