SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 7)
    Function count (children 1)
     ExpressionList
    Function count (children 1)
     ExpressionList (children 1)
      Identifier a
    Function max (children 1)
     ExpressionList (children 1)
      Identifier a
    Function min (children 1)
     ExpressionList (children 1)
      Identifier a
    Function avg (children 1)
     ExpressionList (children 1)
      Identifier a
    Function sum (children 1)
     ExpressionList (children 1)
      Identifier a
    Function any (children 1)
     ExpressionList (children 1)
      Identifier a
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Function CAST (alias a) (children 1)
            ExpressionList (children 2)
             Literal UInt64_1
             Literal \'Nullable(Float64)\'
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier a
     Literal UInt64_0