Fix regression in Horde_Db_SearchParser::parse(). Fixes #12743

Introduced by 0bb0b49
"Use Horde_String."

Signed-off-by: Jan Schneider <jan@horde.org>

framework/Db/lib/Horde/Db/SearchParser.php

@@ -78,7 +78,7 @@ static public function parse($column, $expr)
                 $token = '!OR';
             } elseif (preg_match('/^(AND|OR|NOT)([^a-z].*)?$/i', $expr,
                                  $matches)) {
-                $token = '!' . Horde_String::lower($matches[1]);
+                $token = '!' . Horde_String::upper($matches[1]);
                 $expr = substr($expr, strlen($matches[1]));
             } elseif (preg_match('/^"(([^"]|\\[0-7]+|\\[Xx][0-9a-fA-F]+|\\[^Xx0-7])*)"/',
                                  $expr, $matches)) {