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Improve query type detection #23922

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Merged
merged 1 commit into from
Nov 6, 2020
Merged

Improve query type detection #23922

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15 changes: 9 additions & 6 deletions lib/private/legacy/OC_DB.php
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Original file line number Diff line number Diff line change
Expand Up @@ -73,8 +73,7 @@ public static function prepare($query , $limit = null, $offset = null, $isManipu
throw new \OC\DatabaseException($e->getMessage());
}
// differentiate between query and manipulation
$result = new OC_DB_StatementWrapper($result, $isManipulation);
return $result;
return new OC_DB_StatementWrapper($result, $isManipulation);
}

/**
Expand All @@ -85,22 +84,26 @@ public static function prepare($query , $limit = null, $offset = null, $isManipu
* @return bool
*/
public static function isManipulation($sql) {
$sql = trim($sql);
$selectOccurrence = stripos($sql, 'SELECT');
if ($selectOccurrence !== false && $selectOccurrence < 10) {
if ($selectOccurrence === 0) {
return false;
}
$insertOccurrence = stripos($sql, 'INSERT');
if ($insertOccurrence !== false && $insertOccurrence < 10) {
if ($insertOccurrence === 0) {
return true;
}
$updateOccurrence = stripos($sql, 'UPDATE');
if ($updateOccurrence !== false && $updateOccurrence < 10) {
if ($updateOccurrence === 0) {
return true;
}
$deleteOccurrence = stripos($sql, 'DELETE');
if ($deleteOccurrence !== false && $deleteOccurrence < 10) {
if ($deleteOccurrence === 0) {
return true;
}

\OC::$server->getLogger()->logException(new \Exception('Can not detect if query is manipulating: ' . $sql));

return false;
}

Expand Down