XML - PL/SQL help

Question

Hello,
I am having a query as a part of my procedure block that extracts the following xml and stores it into a variable that is of xmltype:
<FeatureRoot>
<Feature>
<FeatureName>qaz</FeatureName>
<FeatureAction>Add</FeatureName>
</Feature>
<Feature>
<FeatureName>wsx</FeatureName>
<FeatureAction>Remove</FeatureAction>
</Feature>
</FeatureRoot>
Now what i want to do is loop through this variable (which is of xmltype) and print the values of the tags <FeatureName> and <FeatureAction> for every Feature.
(ie)
qaz Add
wsx Remove
Can you please tell me how i can loop through to extract the values?
Many Thanks,
Kalyani

Answer 1

user11912174 wrote:
Hello,
Thank you. The solutions may hold good on a normal context. What my problem is I want to run a loop through an anonymous block in pl/sql where I am already using a cursor where each record contains an xml value as above. So i need to be extracting for each run in a cursor. So i need to be extracting the <FeatureName> and <featureaction> values in each cursor run. Any help on this?
ThanksCan you not incorporate it as part of the cursor itself?
It can return the values as part of the data from the cursor rather than using PL/SQL extracts on the XML to do it.
SQL> ed
Wrote file afiedt.buf
  1  with myxml as
  2    (select xmltype('<FeatureRoot>
  3                       <Feature>
  4                         <FeatureName>qaz</FeatureName>
  5                         <FeatureAction>Add</FeatureAction>
  6                       </Feature>
  7                       <Feature>
  8                         <FeatureName>wsx</FeatureName>
  9                         <FeatureAction>Remove</FeatureAction>
10                       </Feature>
11                     </FeatureRoot>') myxml from dual union all
12     select xmltype('<FeatureRoot>
13                       <Feature>
14                         <FeatureName>aaa</FeatureName>
15                         <FeatureAction>Add</FeatureAction>
16                       </Feature>
17                       <Feature>
18                         <FeatureName>bbb</FeatureName>
19                         <FeatureAction>Remove</FeatureAction>
20                       </Feature>
21                     </FeatureRoot>') from dual)
22  select extractvalue(VALUE(t),'/Feature/FeatureName') featurename
23  ,      extractvalue(VALUE(t),'/Feature/FeatureAction') featureaction
24  from   myxml x
25* ,      table(xmlsequence(extract(x.myxml,'/FeatureRoot/Feature'))) t
SQL> /
FEATURENAME     FEATUREACTION
qaz             Add
wsx             Remove
aaa             Add
bbb             Remove
SQL>