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Avoid duplicated queries

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This commit is contained in:
Michael 2017-05-01 19:54:08 +00:00
parent b9b43e30e6
commit 0241a88c0d
1 changed files with 12 additions and 2 deletions
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14
include/dba.php
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@ -785,7 +785,7 @@ class dba {
*
* @return boolean|array was the delete successfull? When $in_commit is set: deletion data
*/
static public function delete($table, $param, $in_commit = false, $callstack = array()) {
static public function delete($table, $param, $in_commit = false, &$callstack = array()) {
$commands = array();
@ -797,7 +797,7 @@ class dba {
return $commands;
}
$callstack[$key] = $key;
$callstack[$key] = true;
$table = self::$dbo->escape($table);
@ -824,6 +824,16 @@ class dba {
}
}
} else {
// Create a key for preventing double queries
$qkey = $field.'-'.$table.':'.implode(':', array_keys($param)).':'.implode(':', $param);
// We quit when this key already exists in the callstack.
if (isset($callstack[$qkey])) {
continue;
}
$callstack[$qkey] = true;
// Fetch all rows that are to be deleted
$sql = "SELECT ".self::$dbo->escape($field)." FROM `".$table."` WHERE `".
implode("` = ? AND `", array_keys($param))."` = ?";