SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 6)
    Function isDecimalOverflow (children 1)
     ExpressionList (children 2)
      Function toNullable (children 1)
       ExpressionList (children 1)
        Function toDecimal32 (children 1)
         ExpressionList (children 2)
          Literal UInt64_42
          Literal UInt64_0
      Literal UInt64_1
    Function isDecimalOverflow (children 1)
     ExpressionList (children 2)
      Function materialize (children 1)
       ExpressionList (children 1)
        Function toNullable (children 1)
         ExpressionList (children 1)
          Function toDecimal32 (children 1)
           ExpressionList (children 2)
            Literal UInt64_42
            Literal UInt64_0
      Literal UInt64_2
    Function isDecimalOverflow (children 1)
     ExpressionList (children 2)
      Function toNullable (children 1)
       ExpressionList (children 1)
        Function toDecimal64 (children 1)
         ExpressionList (children 2)
          Literal UInt64_42
          Literal UInt64_0
      Literal UInt64_1
    Function isDecimalOverflow (children 1)
     ExpressionList (children 2)
      Function materialize (children 1)
       ExpressionList (children 1)
        Function toNullable (children 1)
         ExpressionList (children 1)
          Function toDecimal64 (children 1)
           ExpressionList (children 2)
            Literal UInt64_42
            Literal UInt64_0
      Literal UInt64_2
    Function isDecimalOverflow (children 1)
     ExpressionList (children 2)
      Function toNullable (children 1)
       ExpressionList (children 1)
        Function toDecimal128 (children 1)
         ExpressionList (children 2)
          Literal UInt64_42
          Literal UInt64_0
      Literal UInt64_1
    Function isDecimalOverflow (children 1)
     ExpressionList (children 2)
      Function materialize (children 1)
       ExpressionList (children 1)
        Function toNullable (children 1)
         ExpressionList (children 1)
          Function toDecimal128 (children 1)
           ExpressionList (children 2)
            Literal UInt64_42
            Literal UInt64_0
      Literal UInt64_2