SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Literal Array_[UInt64_1, UInt64_2, UInt64_3, UInt64_1, UInt64_3] (alias a)
    Function indexOf (alias offset_from_right) (children 1)
     ExpressionList (children 2)
      Function arrayReverse (children 1)
       ExpressionList (children 1)
        Function arraySlice (children 1)
         ExpressionList (children 3)
          Identifier a
          Literal UInt64_1
          Literal Int64_-1
      Literal UInt64_3
    Function arraySlice (children 1)
     ExpressionList (children 2)
      Identifier a
      Function multiIf (children 1)
       ExpressionList (children 3)
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier offset_from_right
          Literal UInt64_0
        Literal UInt64_1
        Function plus (children 1)
         ExpressionList (children 2)
          Function minus (children 1)
           ExpressionList (children 2)
            Function length (children 1)
             ExpressionList (children 1)
              Identifier a
            Identifier offset_from_right
          Literal UInt64_1