Ekstrak Oracle dari nilai pemotongan xml

Apakah Anda menjalankan ini di sqlplus? Ekstrak mengembalikan instance XMLType, dan ditampilkan sesuai dengan panjang variabel, yang defaultnya adalah 80. Jika Anda meningkatkan nilainya, Anda dapat melihat URL lengkapnya.

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

Setelah meningkatkan nilai untuk variabel panjang,

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

Anda dapat menggunakan fungsi getStringVal untuk mengonversi XMLType ke varchar2, yang tidak bergantung pada variabel panjang.

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