SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Literal NULL
    Function proportionsZTest (children 1)
     ExpressionList (children 6)
      Literal UInt64_257
      Literal UInt64_1048575
      Literal UInt64_1048575
      Literal UInt64_257
      Literal Float64_-inf
      Literal NULL
    Function proportionsZTest (children 1)
     ExpressionList (children 5)
      Literal UInt64_1024
      Literal UInt64_1025
      Literal UInt64_2
      Literal UInt64_2
      Literal \'unpooled\'