SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function JSONExtractStringCaseInsensitive (children 1)
     ExpressionList (children 5)
      Literal \'{"LEVEL1": {"level2": {"LEVEL3": {"level4": "deep"}}}}\'
      Literal \'level1\'
      Literal \'LEVEL2\'
      Literal \'level3\'
      Literal \'LEVEL4\'
