Database Software

I can't get those »String Functions that Use Pattern Matching« get to work which are referenced in

XQuery 1.0 and XPath 2.0 Functions and Operators.

Are they not (yet) supported or am I doing simply something wrong?:

SQL> SELECT *
  FROM XMLTABLE('for $i in matches("abracadabra", "bra")
                 return $i')
*
Error at line 3
ORA-19112: error raised during evaluation: oracle.xquery.XQException: XP0017: It is a static error if the expanded QName and number of arguments in a function call do not match the name and arity of an in-scope function in the static context.
Detail: unknown function 'matches'

SQL> SELECT *
  FROM XMLTABLE('for $i in tokenize("The cat sat on the mat", "\s+") 
                 return $i')
                                                         *
Error at line 2
ORA-19112: error raised during evaluation: oracle.xquery.XQException: XP0017: It is a static error if the expanded QName and number of arguments in a function call do not match the name and arity of an in-scope function in the static context.
Detail: unknown function 'tokenize'

SQL> SELECT *
  FROM XMLTABLE('for $i in replace("abracadabra", "bra", "*") 
                 return $i')
                                                         *
Error at line 2
ORA-19112: error raised during evaluation: oracle.xquery.XQException: XP0017: It is a static error if the expanded QName and number of arguments in a function call do not match the name and arity of an in-scope function in the static context.
Detail: unknown function 'replace'

Regards,
Michael