SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function JSONExtract (alias d) (children 1)
     ExpressionList (children 3)
      Function materialize (children 1)
       ExpressionList (children 1)
        Literal \'{"a" : [[], [null, null], ["1", null, "3"], [null, "2", null]]}\'
      Literal \'a\'
      Literal \'Dynamic\'
    Function dynamicType (children 1)
     ExpressionList (children 1)
      Identifier d
