XMLQuery to get data - sql

Question

I have the following SQL :
with q1 (Tdata) as (
SELECT XMLtype(transportdata, nls_charset_id('AL32UTF8'))
from bph_owner.paymentinterchange pint
where --PINT.INCOMING = 'T' and
PINT.TRANSPORTTIME >= to_date('2022-08-10', 'yyyy-mm-dd')
and pint.fileformat = 'pain.001.001.03'
)
--select XMLQuery('//*:GrpHdr/*:InitgPty/Nm/text()'
select tdata, XMLQuery('//*:GrpHdr/*:CtrlSum/text()'
passing Tdata
returning content).getstringval()
,
XMLQuery('//*:GrpHdr/*:MsgId/text()'
passing Tdata
returning content).getstringval()
from q1;
This works but for the InitgPty/Nm/ it doesn't - anybody know how I can extract this information?
Please be gentle as I don't work with XML much.
Thanks

Answer 1

Based on sample data from a previous question and other relating to this XML schema, it appears you just need to wildcard the namespace for Nm node, as well as its parents:
'//*:GrpHdr/*:InitgPty/*:Nm/text()'
so the query could become:
with q1 (Tdata) as (
SELECT XMLtype(transportdata, nls_charset_id('AL32UTF8'))
from paymentinterchange pint
where --PINT.INCOMING = 'T' and
PINT.TRANSPORTTIME >= to_date('2022-08-10', 'yyyy-mm-dd')
and pint.fileformat = 'pain.001.001.03'
)
select
XMLQuery('//*:GrpHdr/*:InitgPty/*:Nm/text()'
passing Tdata
returning content).getstringval() as nm
,
XMLQuery('//*:GrpHdr/*:CtrlSum/text()'
passing Tdata
returning content).getstringval() as ctrlsum
,
XMLQuery('//*:GrpHdr/*:MsgId/text()'
passing Tdata
returning content).getstringval() as msgig
from q1;
But if you're pulling multiple values out of the same document then it's simpler to use XMLTable rather than multiple XMLQuery calls:
select x.nm, x.ctrlsum, x.msgid
from paymentinterchange pint
cross apply XMLTable(
'//*:GrpHdr'
passing XMLtype(pint.transportdata, nls_charset_id('AL32UTF8'))
columns nm varchar2(50) path '*:InitgPty/*:Nm',
ctrlsum number path '*:CtrlSum',
msgid varchar2(50) path '*:MsgId'
) x
where pint.transporttime >= date '2022-08-10'
and pint.fileformat = 'pain.001.001.03';
db<>fiddle with data adapted from a previous question.
Before Oracle 12c you can use cross join instead of cross apply. I don't think it would make a difference in later versions either, that just seems to be my default now...
select x.nm, x.ctrlsum, x.msgid
from paymentinterchange pint
cross join XMLTable(
'//*:GrpHdr'
passing XMLtype(pint.transportdata, nls_charset_id('AL32UTF8'))
columns nm varchar2(50) path '//*:InitgPty/*:Nm',
ctrlsum number path '//*:CtrlSum',
msgid varchar2(50) path '//*:MsgId'
) x
where pint.transporttime >= date '2022-08-12'
and pint.fileformat = 'pain.001.001.03';
db<>fiddle showing it in 11.2.0.2, where it seems to need the // at the start of all the paths, including in the columns clause - those aren't needed in later versions, but here it returns nulls without them.