Add Header to an XML to CSV conversion using XQuery - xquery

Question

Hi I am trying to convert some xml to csv using xquery and found a previous post that helped me get to this point:
for $b in /root/Result
return
concat(escape-html-uri(string-join(($b/HolidayEndDate,
$b/HolidayType,
$b/FirstName,
$b/AllowanceRemainingDays,
$b/HolidayStartDate,
$b/EmployeeId,
$b/AllowanceDays,
$b/LastName,
$b/HolidayDurationDays
)
/normalize-space(),
",")
),
codepoints-to-string(10))
This returns all of the data as required but no Header row. Is there a simple addition to the above code that would also return the header row? Thanks. :)

Answer 1

Since your query returns a sequence of lines, you can just prepend another line before the FLWOR expression:
"HolidayEndDate,HolidayType,FirstName,AllowanceRemainingDays,HolidayStartDate,EmployeeId,AllowanceDays,LastName,HolidayDurationDays
",
for $b in /root/Result
return
concat(escape-html-uri(string-join(($b/HolidayEndDate,
$b/HolidayType,
$b/FirstName,
$b/AllowanceRemainingDays,
$b/HolidayStartDate,
$b/EmployeeId,
$b/AllowanceDays,
$b/LastName,
$b/HolidayDurationDays
)
/normalize-space(),
",")
),
codepoints-to-string(10))
Because nested sequences are flattened (i.e. concatenated) in XQuery, this results in one output sequence including the header. Note also that I used a character entity '
' for the newline character, which is much shorter than codepoints-to-string(10).

Answer 2

concat("HolidayEndDate,HolidayType,FirstName,AllowanceRemainingDays,HolidayStartDate,EmployeeId,AllowanceDays,LastName,HolidayDurationDays
",
string-join(
for $b in /root/Result
return
concat(escape-html-uri(string-join(($b/HolidayEndDate,
$b/HolidayType,
$b/FirstName,
$b/AllowanceRemainingDays,
$b/HolidayStartDate,
$b/EmployeeId,
$b/AllowanceDays,
$b/LastName,
$b/HolidayDurationDays
)
/normalize-space(),
",")
),
codepoints-to-string(10)), "")
)