Hello,

I have this error. According to http://docs.basex.org/wiki/Database_Module#Database_Nodes, I thought modify() was transforming a node to a database node

It seems it does not initialize a document name...

Best regards,

Christophe

Error:
Improper use? Potential bug? Your feedback is welcome:
Contact: basex-talk@mailman.uni-konstanz.de
Version: BaseX 8.1
Java: Oracle Corporation, 1.8.0_31
OS: Windows 7, amd64
Stack Trace:
java.lang.NullPointerException
at org.basex.query.value.item.Str.get(Str.java:49)
at org.basex.query.func.db.DbPath.item(DbPath.java:23)
at org.basex.query.expr.ParseExpr.value(ParseExpr.java:64)
at org.basex.query.QueryContext.value(QueryContext.java:415)
at org.basex.query.up.expr.Transform.value(Transform.java:91)
at org.basex.query.up.expr.Transform.iter(Transform.java:59)
at org.basex.query.up.expr.Transform.iter(Transform.java:25)
at org.basex.query.MainModule.iter(MainModule.java:114)
at org.basex.query.QueryContext.iter(QueryContext.java:343)
at org.basex.query.QueryContext.execute(QueryContext.java:605)
at org.basex.query.QueryProcessor.execute(QueryProcessor.java:98)
at org.basex.core.cmd.AQuery.query(AQuery.java:83)
at org.basex.core.cmd.XQuery.run(XQuery.java:22)
at org.basex.core.Command.run(Command.java:379)
at org.basex.core.Command.execute(Command.java:95)
at org.basex.gui.GUI.exec(GUI.java:466)
at org.basex.gui.GUI.access$400(GUI.java:41)
at org.basex.gui.GUI$7.run(GUI.java:410)
Query:
copy $c := <test/> modify () return db:path($c)
Query plan:
<QueryPlan compiled="true">
<Transform>
<Let>
<Var name="$c" id="0" as="node()"/>
<CElem>
<QNm value="test" type="xs:QName"/>
</CElem>
</Let>
<Empty size="0"/>
<DbPath name="path(node)">
<VarRef>
<Var name="$c" id="0" as="node()"/>
</VarRef>
</DbPath>
</Transform>
</QueryPlan>