| how do i filter out the node which has attribute value equal empty [message #415935] |
Wed, 29 July 2009 17:17  |
zhefeng
Messages: 4
Registered: July 2009
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Junior Member |
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Like this, i am trying to filter out the ditabuild which has child node ditabuildoutput and its basename attributes is empty:
jehan@RAC10U> select *
2 from xmltable(
3 'for $i in /ditabuilds/ditabuild
4 where ($i/ditabuildoutput/@basename!="")
5 return $i'
6 passing xmltype(
7 '<ditabuilds>
8 <ditabuild mount="123" locale="en_us" tail="abc" hash="45678">
9 <ditabuildoutput basename="test11">value1</ditabuildoutput>
10 <ditabuildoutput basename="test12">value2</ditabuildoutput>
11 </ditabuild>
12 <ditabuild mount="223" locale="en_us" tail="efg" hash="55678">
13 <ditabuildoutput basename="">value21</ditabuildoutput>
14 </ditabuild>
15 <ditabuild mount="323" locale="en_us" tail="hij" hash="65678">
16 <ditabuildoutput basename="test1">value31</ditabuildoutput>
17 <ditabuildoutput basename="test2">value32</ditabuildoutput>
18 </ditabuild>
19 </ditabuilds>
20 ')
21 columns
22 mount varchar2(100) path './@mount',
23 locale varchar2(100) PATH './@locale',
24 tail varchar2(100) PATH './@tail',
25 hash varchar2(100) PATH './@hash'
26 );
no rows selected
However, i got no output which is not i expected. i am expecting output like this:
123 323
en_us en_us
abc hij
45678 65678
any idea? thanks!
[Updated on: Wed, 29 July 2009 17:19] Report message to a moderator |
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| Re: how do i filter out the node which has attribute value equal empty [message #415988 is a reply to message #415935] |
Thu, 30 July 2009 01:29  |
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Michel Cadot
Messages: 68716
Registered: March 2007
Location: Saint-Maur, France, https...
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Senior Member
Account Moderator |
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I don't understand your result from your data and what you say and the query your gave. It seems inconsistent for me.
| Quote: | i am trying to filter out the ditabuild which has child node ditabuildoutput and its basename attributes is empty
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| Quote: | $i/ditabuildoutput/@basename!="")
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Empty or not?
What happens if a "ditabuild" contains both "ditabuildoutput" with empty and not empty basename?
Assuming you want "ditabuild" parmaters when it contains at least one "ditabuildoutput" with a non-empty basename.
I don't know how to do it in flower syntax but with SQL one:
SQL> with
2 data as (
3 select xmltype('
4 <ditabuilds>
5 <ditabuild mount="123" locale="en_us" tail="abc" hash="45678">
6 <ditabuildoutput basename="test11">value1</ditabuildoutput>
7 <ditabuildoutput basename="test12">value2</ditabuildoutput>
8 </ditabuild>
9 <ditabuild mount="223" locale="en_us" tail="efg" hash="55678">
10 <ditabuildoutput basename="">value21</ditabuildoutput>
11 </ditabuild>
12 <ditabuild mount="323" locale="en_us" tail="hij" hash="65678">
13 <ditabuildoutput basename="test1">value31</ditabuildoutput>
14 <ditabuildoutput basename="test2">value32</ditabuildoutput>
15 </ditabuild>
16 </ditabuilds>
17 ') val
18 from dual
19 )
20 select extractvalue(value(b),'/ditabuild/@mount') mount,
21 extractvalue(value(b),'/ditabuild/@locale') locale,
22 extractvalue(value(b),'/ditabuild/@tail') tail,
23 extractvalue(value(b),'/ditabuild/@hash') hash
24 from data a,
25 table(xmlsequence(extract(a.val,'/ditabuilds/ditabuild'))) b,
26 table(xmlsequence(extract(b.column_value, '/ditabuild/ditabuildoutput'))) c
27 group by extractvalue(value(b),'/ditabuild/@mount'),
28 extractvalue(value(b),'/ditabuild/@locale'),
29 extractvalue(value(b),'/ditabuild/@tail'),
30 extractvalue(value(b),'/ditabuild/@hash')
31 having max(nvl(extractvalue(value(c),'/ditabuildoutput/@basename'),' ')) != ' '
32 /
MOUNT LOCALE TAIL HASH
---------- ---------- ---------- ----------
323 en_us hij 65678
123 en_us abc 45678
2 rows selected.
Regards
Michel
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