DevOps, CI/CD and Automation

Hi all,

When I try to use the ora:contains operator in any query, for example:

select id from publi where
existsNode(publi, '/PUBLI[ora:contains(TITULO,"informes")>0]',
'xmlns:ora="http://xmlns.oracle.com/xdb"') = 1;

then, the system gives me the following error:

ERROR at line 2:
ORA-29900: operator binding does not exist
ORA-06553: PLS-306: wrong number or types of arguments in call to 'EXISTSNODE'

Could it be a XML database (xdb) configuration problem?

Thank you very much in advance.