Hi Helen,
Take a look at the docs for xdmp:eval() and xdmp:invoke(), specifically
the database option. Here's a quick example.
xdmp:eval(
'xquery version "1.0-ml";
declare variable $URI as xs:string external;
fn:doc($URI)
', (xs:QName("URI"), "/foo.xml"),
<options xmlns="xdmp:eval">
<database>{xdmp:database("OtherDatabase")}</database>
</options>)
Note that a cross database eval/invoke will always run as a separate
transaction (either a second update, or at a different commit timestamp
if it's a query).
I've found the xdmp:function capability very useful in this context to
call a function in the context of a different database.
declare function local:foo($arg1, $arg2) { ... };
xdmp:eval(
'declare variable $FN as xdmp:function external;
declare variable $ARG1 external;
declare variable $ARG2 external;
xdmp:apply($FN,$ARG1,$ARG2)
', (xs:QName("FN"), xdmp:function("local:foo"),
xs:QName("ARG1"), $x,
xs:QName("ARG2"), $y),
<options xmlns="xdmp:eval">
<database>{xdmp:database("OtherDatabase")}</database>
</options>)
Both of those code snippets are from memory, so they may not be quite right.
Wayne.
On 08/19/2010 10:41 AM, helen chen wrote:
I'm inside marklogic and in database A, if I want to get some document from another
database B and do something, like if I want to get the list of document with uri
pattern "/a/b/*xml" from database B, how can I do it?
Thanks, Helen
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Wayne Feick
Lead Engineer
MarkLogic Corporation
Phone +1 650 655 2378
Cell +1 408 981 4576
www.marklogic.com
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