SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Identifier ta.id (alias id)
    Function arraySort (alias symmetricDifference) (children 1)
     ExpressionList (children 1)
      Function arraySymmetricDifference (children 1)
       ExpressionList (children 2)
        Identifier ta.arr1
        Identifier ta.arr2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test_arraySymmetricDifference (alias ta)