SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Function count (children 1)
     ExpressionList (children 1)
      Identifier s
    Function countIf (children 1)
     ExpressionList (children 1)
      Function notEquals (children 1)
       ExpressionList (children 2)
        Identifier s
        Literal \'\'
    Function arraySort (children 1)
     ExpressionList (children 1)
      Function groupUniqArray (children 1)
       ExpressionList (children 1)
        Identifier s
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t_modify_to_nullable
