Hello all,

 

BaseX doesn’t seem to like the query below. Any particular reason – it makes sense to me. I’m trying to add items to a DB incrementally to (attempt to) avoid running into out of memory exceptions when cutting a slice of a large DB into a smaller one.

 

for tumbling window $w in db:open(myDB')//ani:ref-authors/ani:author

start at $s when $s mod 50000 = 1

return

 db:add(

   'sliceDB',

   <index>{$w}</index>,

   'somepath.xml'

 )

 

 

Improper use? Potential bug? Your feedback is welcome:

Contact: basex-talk@mailman.uni-konstanz.de

Version: BaseX 8.3

Java: Oracle Corporation, 1.8.0_40

OS: Windows 7, amd64

Stack Trace:

java.lang.NullPointerException

                at org.basex.query.expr.ParseExpr.checkAllUp(ParseExpr.java:219)

                at org.basex.query.expr.ParseExpr.checkNoneUp(ParseExpr.java:203)

                at org.basex.query.expr.gflwor.Window.checkUp(Window.java:341)

                at org.basex.query.expr.gflwor.GFLWOR.checkUp(GFLWOR.java:791)

                at org.basex.query.QueryContext.check(QueryContext.java:265)

                at org.basex.query.QueryParser.finish(QueryParser.java:279)

                at org.basex.query.QueryParser.parseMain(QueryParser.java:176)

                at org.basex.query.QueryContext.parseMain(QueryContext.java:221)

                at org.basex.query.QueryProcessor.parse(QueryProcessor.java:56)

                at org.basex.core.cmd.AQuery.parse(AQuery.java:144)

                at org.basex.core.cmd.AQuery.updating(AQuery.java:158)

                at org.basex.core.cmd.AQuery.updating(AQuery.java:288)

                at org.basex.gui.GUI.exec(GUI.java:458)

                at org.basex.gui.GUI.access$400(GUI.java:43)

                at org.basex.gui.GUI$7.run(GUI.java:412)