SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function length (children 1)
     ExpressionList (children 1)
      Function JSONExtractKeysAndValuesRawCaseInsensitive (children 1)
       ExpressionList (children 1)
        Literal \'{"KEY1": "value1", "key2": 100}\'
