SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Identifier access_type
    Identifier access_object
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.grants
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier user_name
     Literal \'test_user_03593\'
