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Fix for SQLite not supporting UNION on tables that use ORDER BY

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This commit is contained in:
Daniel Winzen
2021-05-23 12:30:51 +02:00
parent ec0d167647
commit 20ebe8a995
1 changed files with 19 additions and 1 deletions
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20
chat.php
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@ -3698,7 +3698,25 @@ function cron(){
}
// delete old notes
$limit=get_setting('numnotes');
$db->exec('DELETE FROM ' . PREFIX . 'notes WHERE type!=2 AND type!=3 AND id NOT IN (SELECT * FROM ( (SELECT id FROM ' . PREFIX . "notes WHERE type=0 ORDER BY id DESC LIMIT $limit) UNION (SELECT id FROM " . PREFIX . "notes WHERE type=1 ORDER BY id DESC LIMIT $limit) ) AS t);");
$to_keep = [];
$stmt = $db->query('SELECT id FROM ' . PREFIX . "notes WHERE type=0 ORDER BY id DESC LIMIT $limit;");
while($tmp = $stmt->fetch(PDO::FETCH_ASSOC)){
$to_keep []= $tmp['id'];
}
$stmt = $db->query('SELECT id FROM ' . PREFIX . "notes WHERE type=1 ORDER BY id DESC LIMIT $limit;");
while($tmp = $stmt->fetch(PDO::FETCH_ASSOC)){
$to_keep []= $tmp['id'];
}
$query = 'DELETE FROM ' . PREFIX . 'notes WHERE type!=2 AND type!=3';
if(!empty($to_keep)){
$query .= ' AND id NOT IN (';
for($i = count($to_keep); $i > 1; --$i){
$query .= '?, ';
}
$query .= '?)';
}
$stmt = $db->prepare($query);
$stmt->execute($to_keep);
$result=$db->query('SELECT editedby, COUNT(*) AS cnt FROM ' . PREFIX . "notes WHERE type=2 GROUP BY editedby HAVING cnt>$limit;");
$stmt=$db->prepare('DELETE FROM ' . PREFIX . 'notes WHERE (type=2 OR type=3) AND editedby=? AND id NOT IN (SELECT * FROM (SELECT id FROM ' . PREFIX . "notes WHERE (type=2 OR type=3) AND editedby=? ORDER BY id DESC LIMIT $limit) AS t);");
while($tmp=$result->fetch(PDO::FETCH_NUM)){