hi
now i need transfer a expression to XQuery ,but i don’t know how to do?

help me

how declare a variable and how can i orgnize a expression in XQuery? following:

double $xn, $f, $g, $rg, $result

$result = $f + $f * $rg

Hi,

XQuery is a functional language, i.e. there are no assignments.
The closest XQuery (or rather me using it) can get to what you
want is :

let $f := 17e1
let $g := 13.01
let $rg := 1.2
let $result := $f + $f * $rg
return $result

The types of the variables and all other expressions are
derived from the values provided or calculated.

Regards,
Juliane.

hi
Juliane

The version of the Quip engine that i’m using now is 2.2.1.1
i don’t know this version whether to support the expression what i said.

i had defined a fuction,following:

define function cos( double $x)returns AnyType
{

let $R1 := -0.1666665668e+0
let $R2 := 0.8333025139e-2
let $R3 := -0.1980741872e-3
let $R4 := 0.2601903036e-5
let $INVSPI := 0.31830988618379067154
let $HALFPI := 1.57079632679489661923
let $C1 := 3.140625
let $C2 := 9.67653589793e-4
let $x := abs($x)
let $n := (($x + $HALFPI) * $INVSPI) + 0.5
let $xn := double($n) - 0.5
let $sign := $n mod 2
let $f := ($x - $xn * $C1) - $xn * $C2
let $g := $f * $f
let $rg := ((($R4 * $g + $R3) * $g + $R2) * $g + $R1) * $g
let $result := $f + $f * $rg
if($sign=1) then -$result else $result

}

when execute it ,the Quip engine throw a err:
<?xml version="1.0" encoding="UTF-8" ?>



<quip:ExecutionError xmlns:quip=“http://namespaces.softwareag.com/tamino/quip/”>

quip:queryFileC:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\Query41948.tmp

</quip:queryFile>

quip:message<![CDATA[Error (36,1): return clause missing

actual token found: if

]]></quip:message>

</quip:ExecutionError>

Please help me how can i do it ?

Regards,
nicle.

Hi nicle,

the problem is exactly described in the message, the return
clause is missing. When using either let or for you need a
return to follow. Your query needs a return preceding the if
clause. Read the chapter about FLWOR expressions in the W3C’s
xquery draft, i.e.
http://www.w3.org/TR/xquery/#id-flwor-expressions.

Regards,
Juliane.