It all depends on what is inside of $x !
This case wont work:
xdmp:eval($x, (xs:QName("x"), "world"))
unless $x contains a external variable declaration for $x
Example:
let $x := "1 + 1"
return xdmp:eval($x)
==> 2
But this doesnt do what you want really ..
let $x := "1 + 1"
return xdmp:eval($x, (xs:QName("x"), "world"))
==> 2
This does: (but warning the use of $x in 2 contexts is humanly confusing.
let $x := "declare variable $x external; $x"
return xdmp:eval($x, (xs:QName("x"), "world"))
==> "world"
-----------------------------------------------------------------------------
David Lee
Lead Engineer
MarkLogic Corporation
d...@marklogic.com
Phone: +1 812-482-5224
Cell: +1 812-630-7622
www.marklogic.com<http://www.marklogic.com/>
From: general-boun...@developer.marklogic.com
[mailto:general-boun...@developer.marklogic.com] On Behalf Of Pascal Cadet
Sent: Wednesday, October 17, 2012 9:36 AM
To: Mike Sokolov
Cc: MarkLogic Developer Discussion
Subject: Re: [MarkLogic Dev General] Eval and invoke: set the context item?
Hi,
Try this ways :
- xdmp:value("$x")
- xdmp:eval($x, (xs:QName("x"), "world"))
Pascal
2012/10/17 David Lee <david....@marklogic.com<mailto:david....@marklogic.com>>
for $x in //x return xdmp:eval ($x)
-----------------------------------------------------------------------------
David Lee
Lead Engineer
MarkLogic Corporation
d...@marklogic.com<mailto:d...@marklogic.com>
Phone: +1 812-482-5224<tel:%2B1%20812-482-5224>
Cell: +1 812-630-7622<tel:%2B1%20812-630-7622>
www.marklogic.com<http://www.marklogic.com>
-----Original Message-----
From: Mike Sokolov [mailto:soko...@ifactory.com<mailto:soko...@ifactory.com>]
Sent: Wednesday, October 17, 2012 9:24 AM
To: MarkLogic Developer Discussion
Cc: David Lee; Florent Georges
Subject: Re: [MarkLogic Dev General] Eval and invoke: set the context item?
On 10/16/2012 03:07 PM, David Lee wrote:
> In MarkLogic the context item is the entire database, it isnt settable.
>
>
> --------------------------
Just to expand a little on that, that's true for outermost expressions,
but there is a context item for every expression, and since xdmp:eval()
may occur within another expression, it's a reasonable question whether
its enclosing context is available or not:
for $x in //x return xdmp:eval ("$x")
but the answer is no ...
XDMP-UNDVAR: (err:XPST0008) Undefined variable $x
and I guess there is no way to provide it?
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--
Pascal CADET
06 12 97 02 53
www.pressinnov.com<http://www.pressinnov.com>
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