SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function JSONExtractArrayRaw (children 1)
     ExpressionList (children 1)
      Function arrayJoin (children 1)
       ExpressionList (children 1)
        Function JSONExtractArrayRaw (children 1)
         ExpressionList (children 1)
          Literal \'[[1,2,3],[4,5,6]]\'
