SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Function quantile (children 2)
     ExpressionList (children 1)
      Literal NULL
     ExpressionList (children 1)
      Literal Float64_0.5
    Function quantile (children 2)
     ExpressionList (children 1)
      Literal NULL
     ExpressionList (children 1)
      Literal Float64_0.9
    Function quantiles (children 2)
     ExpressionList (children 1)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal NULL
        Literal \'Nullable(UInt32)\'
     ExpressionList (children 2)
      Literal Float64_0.1
      Literal Float64_0.2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t1
