Hello together,
Currently I'm using Accumulo 1.7 (currently single a node) with the
IntersectingIterator.
The current index schema for the IntersectingIterator looks like this, for
example:
key1 : term1 : doc1
key1 : term2 : doc1
key2 : term3 : doc1
I've noticed that I can't intersect terms which are in distinct key-ranges.
Is that a correct behavior, or I'm doing something wrong?
Extract of my code (Scala) as example:
val bs = conn.createBatchScanner(tableName, authorizations, numQueryThreads)
val terms = List(new Text("term1"), new Text("term2")).toArray
val ii = new IteratorSetting(priority, name, iteratorClass)
IntersectingIterator.setColumnFamilies(ii, terms)
bs.addScanIterator(ii)
bs.setRanges(Collections.singleton(new Range())) // all ranges
for (entry <- bs.asScala.take(100)) yield {
entry.getKey.getColumnQualifier.toString
}
This will yield "doc1" as expected.
But if I'll choose the terms like this:
// ...
val terms = List(new Text("term1"), new Text("term3")).toArray
// ...
It will yield "null" but I would expect here also "doc1".
I've also tried this with setting a list of Range.exact,
but I'll get also "null".
I'm doing something wrong?
Thank you in advance!
Regards,
Sven
--
Sven Hodapp, M.Sc.,
Fraunhofer Institute for Algorithms and Scientific Computing SCAI,
Department of Bioinformatics
Schloss Birlinghoven, 53754 Sankt Augustin, Germany
[email protected]
www.scai.fraunhofer.de
