SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function JSONExtractIntCaseInsensitive (children 1)
     ExpressionList (children 4)
      Literal \'{"LEVEL1": {"Level2": {"level3": 999}}}\'
      Literal \'level1\'
      Literal \'LEVEL2\'
      Literal \'LEVEL3\'
