SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function JSONExtract (children 1)
     ExpressionList (children 2)
      Literal \'{"a": [100.0, 200], "b": [-100, 200.0, 300]}\'
      Literal \'Map(Int64, Array(Float64))\'