** Changed in: zorba
Importance: Undecided => Medium
** Changed in: zorba
Assignee: (unassigned) => Markos Zaharioudakis (markos-za)
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https://bugs.launchpad.net/bugs/900688
Title:
cyclic dependency of declared variables not detected correctly
Status in Zorba - The XQuery Processor:
New
Bug description:
According to the XQuery 3.0 spec (sentence 'The static context for an
initializing expression includes all functions, variables, and
namespaces that are declared or imported anywhere in the Prolog, other
than the variable being declared.' at http://www.w3.org/TR/xquery-30
/#id-variable-declarations), forward references of variables should
work. Thus, queries like this should work:
declare variable $y := $x;
declare variable $x := <a/>;
$y
Currently, this throws the error XPST0008.
This implies that circular dependencies have to be detected. Like in
Such forward references can cause circular dependencies like in:
declare variable $x := 3 + $b;
declare variable $b := $x;
$x
This has to cause error XQST0054.
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