Wyciąg Oracle z wartości obcinania xml

Czy wykonujesz to w sqlplus? Funkcja Extract zwraca instancję XMLType i jest wyświetlana zgodnie z długi zmienna, która jest domyślnie ustawiona na 80. Jeśli zwiększysz wartość, zobaczysz pełny adres URL.

SQL> with x(contact_data) as (
select '<?xml version="1.0" encoding="UTF-8"?>
<service_orders count="1">
   <service_order order_number="fakefakefake" id="fakefakefake">
      <images count="2">
       <image src="https://s3.amazonaws.com/some_subfolder/deeper/deeper_still/ever_deeper/really_big_long_url_goes_here"/>
        </images>
</service_order>
</service_orders>' from dual
)
select
    length(extract(xmltype(contact_data),'/service_orders/service_order/images/image/@src')) as url_length,
    extract(xmltype(contact_data),'/service_orders/service_order/images/image/@src') as url
from
    x;  

URL_LENGTH
----------
URL
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
       101
https://s3.amazonaws.com/some_subfolder/deeper/deeper_still/ever_deeper/really_b

Po zwiększeniu wartości długiej zmiennej

SQL> set long 120

SQL> with x(contact_data) as (
select '<?xml version="1.0" encoding="UTF-8"?>
<service_orders count="1">
   <service_order order_number="fakefakefake" id="fakefakefake">
      <images count="2">
       <image src="https://s3.amazonaws.com/some_subfolder/deeper/deeper_still/ever_deeper/really_big_long_url_goes_here"/>
        </images>
</service_order>
</service_orders>' from dual
)
select
    length(extract(xmltype(contact_data),'/service_orders/service_order/images/image/@src')) as url_length,
    extract(xmltype(contact_data),'/service_orders/service_order/images/image/@src') as url
from
    x;  

URL_LENGTH
----------
URL
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
       101
https://s3.amazonaws.com/some_subfolder/deeper/deeper_still/ever_deeper/really_big_long_url_goes_here

Możesz użyć funkcji getStringVal, aby przekonwertować XMLType na varchar2, która nie zależy od długiej zmiennej.

SQL> set long 80

SQL> with x(contact_data) as (
select '<?xml version="1.0" encoding="UTF-8"?>
<service_orders count="1">
   <service_order order_number="fakefakefake" id="fakefakefake">
      <images count="2">
       <image src="https://s3.amazonaws.com/some_subfolder/deeper/deeper_still/ever_deeper/really_big_long_url_goes_here"/>
        </images>
</service_order>
</service_orders>' from dual
)
select
    length(extract(xmltype(contact_data),'/service_orders/service_order/images/image/@src')) as url_length,
    extract(xmltype(contact_data),'/service_orders/service_order/images/image/@src').getStringval() as url
from
    x; 

URL_LENGTH
----------
URL
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
       101
https://s3.amazonaws.com/some_subfolder/deeper/deeper_still/ever_deeper/really_big_long_url_goes_here