Add support for PostgreSQL cast operator - better solution

Author: forrest79

src/Tokenizer.php

@@ -710,6 +710,7 @@ final class Tokenizer
     private $boundaries = [
         ',',
         ';',
+        '::', // PostgreSQL cast operator
         ':',
         ')',
         '(',
@@ -857,11 +858,6 @@ private function createNextToken(string $string, ?Token $previous = null): Token
             );
         }
 
-        // PostgreSQL cast operator
-        if (substr($string, 0, 2) === '::') {
-            return new Token(Token::TOKEN_TYPE_BOUNDARY, '::');
-        }
-
         // User-defined Variable
         if (($string[0] === '@' || $string[0] === ':') && isset($string[1])) {
             $value = null;