SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function arrayDistinct (children 1)
     ExpressionList (children 1)
      Function arrayPopFront (children 1)
       ExpressionList (children 1)
        Function arrayDifference (children 1)
         ExpressionList (children 1)
          Function groupArray (children 1)
           ExpressionList (children 1)
            Identifier number
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t
