[Monetdb-developers] Announcement: New Nov2009 feature release of MonetDB suite

Stefan Manegold Stefan.Manegold at cwi.nl
Mon Nov 30 00:52:13 CET 2009

Dear all,

The MonetDB team at CWI/MonetDB BV are pleased to announce the new
"Nov2009" feature release of the MonetDB suite of programs.
This feature release is backward compatible with the previous
releases (Nov2008 through Aug2009-SP2).

Caveat 1:
In MonetDB/XQuery, we extended and improved the use of value indices on
comparisions between a value and an XPath ending in text() or attribute
access (e.g., doc(x)//x/y[z/text() = "foo"] and for $x in doc//x/y where
$x/@z = "bar" return $x); such queries do not need scanning data, but start
at the index and navigate backwards from there.
This required a change in the physical database storage. While the Nov2009
release of MonetDB/XQuery can still read older (pre-Nov2009) databases, it
is recommended to (back-up and) re-shred all documents to benefit from the
new indices and achieve optimal performance.

Caveat 2:
When upgrading from a release older than May2009 (i.e., Nov2008
through Feb2009-SP2), you need to move your write-ahead log
following the "recommended" instructions for
SQL (<http://monetdb.cwi.nl/Development/Releases/May2009/#SQL>)
XQuery (<http://monetdb.cwi.nl/Development/Releases/May2009/#XQuery>).

More information on the new release is available at

The sources and binaries are available at


The MonetDB team at CWI/MonetDB BV.

| Dr. Stefan Manegold | mailto:Stefan.Manegold at cwi.nl |
| CWI,  P.O.Box 94079 | http://www.cwi.nl/~manegold/  |
| 1090 GB Amsterdam   | Tel.: +31 (20) 592-4212       |
| The Netherlands     | Fax : +31 (20) 592-4312       |

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