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Possible bug: dbxml 6.x.x misses query matches

danieldkOct 28 2017 — edited Dec 14 2017

On some large DB XML databases, we have seen far lower numbers of query hits with DB XML 6.x.x compared to 2.5.16. Unfortunately, 2.5.16 seems to return the correct results, whereas the 6.x.x versions do not. I finally had some time to make a minimal example. Example run:

% ~/dbxml-2.5.16/bin/dbxml -s example-script.txt

wiki-11/wiki-11.p.30.s.7.xml

wiki-11/wiki-11.p.34.s.13.xml

wiki-11/wiki-11.p.41.s.1.xml

% ~/dbxml-6.1.4/bin/dbxml -s example-script.txt

wiki-11/wiki-11.p.30.s.7.xml

The example database and query script can be downloaded from:

http://www.sfs.uni-tuebingen.de/~ddekok/misc/dbxml-test.dact

http://www.sfs.uni-tuebingen.de/~ddekok/misc/example-script.txt

Observe that the missing two files also contain nodes matching the query.