How to parse XML in Postgres newer versions also

Hi!

In Postgres 9.1.2 script below produces proper results:

1.34
5.56

In Postgres 11 it produces wrong results:

null
null

How to make it also to work in newer versions on Postgres ?

create temp table t(x xml, nsa text[][]) on commit drop;
insert into t values(
'<?xml version="1.0" encoding="UTF-8"?>
<Document xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="urn:iso:std:iso:20022:tech:xsd:camt.053.001.02">
<BkToCstmrStmt>
<Stmt>
<Ntry>
<Amt Ccy="EUR">1.34</Amt>
</Ntry>
<Ntry>
<Amt Ccy="EUR">5.56</Amt>
</Ntry>
</Stmt>
</BkToCstmrStmt>
</Document> '::xml,
ARRAY[ARRAY['ns','urn:iso:std:iso:20022:tech:xsd:camt.053.001.02']]);

SELECT
(xpath('Amt/text()', x,nsa))[1]::text::numeric AS tasusumma
FROM (
SELECT unnest(xpath('/ns:Document/ns:BkToCstmrStmt/ns:Stmt/ns:Ntry',
x,nsa)) as x,
nsa
FROM t
) Ntry

Andrus.