code cleanup

core/Driver/SQL/Condition/Compare.class.php

@@ -8,14 +8,14 @@ class Compare extends Condition {
   private string $column;
   private $value;
 
-  public function __construct($col, $val, $operator='=') {
+  public function __construct(string $col, $val, string $operator = '=') {
     $this->operator = $operator;
     $this->column = $col;
     $this->value = $val;
   }
 
-  public function getColumn() { return $this->column; }
+  public function getColumn(): string { return $this->column; }
   public function getValue() { return $this->value; }
-  public function getOperator() { return $this->operator; }
+  public function getOperator(): string { return $this->operator; }
 
 }