- announce-list - monetdb.org

[Monetdb-announce] Announcement: New Aug2011-SP3 Bugfix release of MonetDB suite
by Fabian Groffen 22 Nov '11

22 Nov '11

The MonetDB team at CWI/MonetDB BV is pleased to announce the Aug2011-SP3 bugfix release of the MonetDB suite of programs. More information about MonetDB can be found on our website at http://www.monetdb.org/. For details on this release, please see the release notes at <http://www.monetdb.org/Downloads/ReleaseNotes>. As usual, the download location is <http://dev.monetdb.org/downloads/>. Note that this is the last release of the Aug2011 branch. From now on, no further development will take place on this branch. Aug 2011-SP3 bugfix release SQL * Added a fix for bug #2834, which caused weird (failing) behaviour with PreparedStatements. Merovingian * Fixed a bug where monetdbd's socket files from /tmp were removed when a second monetdbd was attempted to be started using the same port. Bug Fixes * 2875: incomplete database initialization * 2912: Function body disappears after loading data - error message: SQLException:sql.resultSet:Cannot access descriptor * 2919: Add column and select in same transaction * 2920: Updated database from Aug2011 to Dec2011 make queries fail with "Subquery result missing". * 2921: complex where clause broken * 2923: Multiplication and cast from decimal to integer leads to 0 value * 2924: use LIKE with ESCAPE ignores OR operator * 2928: Cannot update a field with a count query based on an other table

1 0

[Monetdb-announce] Announcement: New Aug2011-SP2 Bugfix release of MonetDB suite
by MonetDB Release Engineer 26 Oct '11

26 Oct '11

The MonetDB team at CWI/MonetDB BV is pleased to announce the Aug2011-SP2 bugfix release of the MonetDB suite of programs. More information about MonetDB can be found on our website at http://www.monetdb.org/. For details on this release, please see the release notes at <http://www.monetdb.org/Downloads/ReleaseNotes>. As usual, the download location is <http://dev.monetdb.org/downloads/>. Aug 2011-SP2 bugfix release Client Package * ODBC: Implemented a workaround in SQLTables for bug 2908. * Small improvement to mclient's table rendering for tables without any rows. Previously, the column names in the header could be squeezed to very small widths, degrading readability. * Python DB API connect() function now supports PEP 249-style arguments user and host, bug #2901 * mclient now checks the result of encoding conversions using the iconv library. * Fixed a source of crashes in mclient when a query on the command line using the -s option is combined with input on standard input (e.g. in the construct mclient -s 'COPY INTO t FROM STDIN ...' < file.csv). * Fixed bug 2897 where slow (network) reads could cause blocks to not be fully read in one go, causing errors in the subsequent use of those blocks. With thanks to Rémy Chibois. * Fixed a bug in mclient where processing queries from files could result in ghost empty results to be reported in the output Merovingian * Resolved problem where monetdbd would terminate abnormally when databases named 'control', 'discovery' or 'merovingian' were stopped. * monetdbd get status now also reports the version of the running monetdbd * Improved response time of 'monetdb start' when the database fails to start. * Fixed a bug in monetdbd where starting a failing database could incorrectly be reported as a 'running but dead' database. * To avoid confusion, all occurrences of merovingian were changed into monetdbd for error messages sent to a client. Bug Fixes * 2346: mkey.bulk_rotate_xor_hash MAL exception * 2712: un-rolled-back savepoints cause crash upon scenario exit * 2774: COPY INTO of double (~1.0e-310) cannot be imported. * 2890: Slow execution of COUNT in combination with DISTINCT * 2894: No consistent behavior of implicit cast of integer to double * 2897: Mapi.pm: short reads not handled when reading blocks from server * 2898: order by for multiple (two) columns fails for large tables when second ordering is 'desc': "mat.refine_reverse' undefined" * 2900: rand(int) should not return NULL * 2901: Make keyword arguments in Python DB API connect() function more standard * 2904: TypeException after calling UDF in other than sys schema (when it is initialised) * 2906: "ALTER TABLE mytable SET READ ONLY" results in server segfault * 2908: SQL query produces error with MAL statements * 2909: query result is not displayed when history = true

1 0

[Monetdb-announce] Announcement: New Aug2011-SP1 bugfix release of MonetDB suite
by Fabian Groffen 30 Sep '11

30 Sep '11

The MonetDB team at CWI/MonetDB BV is pleased to announce the Aug2011-SP1 bugfix release of the MonetDB suite of programs. More information about MonetDB can be found on our website at http://www.monetdb.org/. For details on this release, please see the release notes at <http://www.monetdb.org/Downloads/ReleaseNotes>. As usual, the download location is <http://dev.monetdb.org/downloads/>. Aug 2011-SP1 bugfix release SQL * Fixed a bug when using default values for interval columns. Bug 2877. * A bug was fixed where deleted rows weren't properly accounted for in all operations. This was bug 2882. * A bug was fixed which caused an update to an internal table to happen too soon. The bug could be observed on a multicore system with a query INSERT INTO t (SELECT * FROM t) when the table t is "large enough". This was bug 2883. Client Package * Fixed Perl DBD rowcount for larger results, bug #2889 * Perl: We now distinguish properly between TABLE and GLOBAL TEMPORARY (the latter are recognized by being in the "tmp" schema). * Perl: fixed a bunch of syntax errors. This fixes bug 2884. With thanks to Rémy Chibois. * Perl: Fixed DBD::monetdb table_info and tabletype_info. This fixes bug 2885. With thanks to Rémy Chibois. * mclient: fix display of varchar columns with only NULL values. * Fixed a bug in mclient/msqldump where an internal error occurred during dump when there are GLOBAL TEMPORARY tables. MonetDB5 Server * Fixed a problem where MAL variables weren't properly cleared before reuse of the data strucutre. This problem could cause the data flow scheduler to generate dependencies between instructions that didn't actually exist, which in turn could cause circular dependencies among instructions with deadlock as a result. Bugs 2865 and 2888. Bug Fixes * 2865: mserver5 --set gdk_nr_threads=2 --forcemito: deadlock during first SQL client connect on virgin (empty) DB * 2877: assertion failed when creating table with default interval * 2879: A SELECT query fails to produce some results * 2882: Delete of some records don't work on Monetdb * 2883: insert into t (select * from t) bogus in multithreaded execution * 2884: Mapi.pm and GetInfo.pm syntax fixes for array usage * 2885: DBD::monetdb table_info error * 2887: Division by zero error, when should not divide at 0 * 2888: test/null/null_in_case.sql hangs server * 2889: Mapi::getBlock is erasing query count on second call

1 0

[Monetdb-announce] Announcement: New Apr2011-SP2 bugfix release of MonetDB suite
by Sjoerd Mullender 16 Sep '11

16 Sep '11

The MonetDB team at CWI/MonetDB BV is pleased to announce the Aug2011 feature release of the MonetDB suite of programs. The default width for OID columns in the database is now 64 bits for all 64-bit architecture. In releases up to this release, the default width on 64-bit Windows was still 32 bits. This means that with the current release it is possible to have tables with more than about 2 million rows even on Windows (as long as you use a 64-bit build). More information (including release notes) on this release is available at <http://www.monetdb.org/Downloads/ReleaseNotes>. As usual, the download location is <http://dev.monetdb.org/downloads/>. -- Sjoerd Mullender

1 0

[Monetdb-announce] Announcement: New Apr2011-SP2 bugfix release of MonetDB suite
by Sjoerd Mullender 29 Jul '11

29 Jul '11

The MonetDB team at CWI/MonetDB BV is pleased to announce the Apr2011-SP2 bug fix release of the MonetDB suite of programs. This is the first release with support for Fedora 15. Fedora 13 is no longer supported. One important bug fix has to do with columns with string (char/varchar) values. There was a bug that could cause exponential growth of the file holding the data for the column. This bug has been fixed. If you have a database that is much larger than you would expect for the amount of data, this might be the cause. The remedy is to dump and restore that database (or just the affected tables). Apart from using up too much space, this bug didn't have any other consequences. More information (including release notes) on this release is available at <http://www.monetdb.org/OldReleaseNotes/Apr2011>. As usual, the download location is <http://dev.monetdb.org/downloads/>. -- Sjoerd Mullender

1 0

[Monetdb-announce] PhD opening at CWI - Adaptive indexing techniques for modern database systems
by Stratos Idreos 23 Jun '11

23 Jun '11

Subject: Adaptive indexing techniques for modern database systems. The Centrum Wiskunde & Informatica (CWI) has a full time vacancy for a talented PhD candidate in the Database Architectures group (http://www.cwi.nl/en/research-groups/Database-Architectures) The position is in the broad area of adaptive indexing techniques for modern database systems. Adaptive indexing is a major challenge in database research; it tries to completely alleviate the need for indexing and tuning steps leading to database systems that require no physical design set-up and can cope immediately with any workload. This leads to database systems that are instantly usable and thus more applicable to numerous new applications that now consider databases too slow, too complex and too old. This position will focus specifically on adaptive indexing for extremely large databases where traditional indexing represents a major bottleneck. The Database Architectures group is one of the world-wide leading groups in system-oriented database research, e.g., it received the 10-year best paper award at VLDB 2009 for their pioneering research on hardware-aware database technology and the column-store model and the 2011 ACM SIGMOD Jim Gray Dissertation award for the database cracking work. The group has a unique methodology that combines fundamental database research with active participation of all group members in database engineering, centred around the open-source analytical database system MonetDB (http://www.monetdb.org/) An internship at one of the partnering database research labs world-wide is considered part of the PhD track. REQUIREMENTS The PhD candidates must have a master degree in computer science (or a 5 year diploma), (specialisation databases, distributed systems, software engineering) mathematics, or related fields. Preferable qualifications for candidates include proven research talent, system programming skills (C/C++), practical experience with using and implementing database systems, and software development in a team. Candidates are expected to have an excellent command of English, and good academic writing and presentation skills. CENTRUM WISKUNDE & INFORMATICA (CWI) Founded in 1946, the Centrum Wiskunde & Informatica (CWI) is the national research institute for mathematics and computer science in the Netherlands. It is located at the Science Park Amsterdam and is part of the “Netherlands Organisation for Scientific Research” (NWO). The institute is internationally focused and renowned for its high quality research, a substantial fraction of which is carried out in the framework of (inter)national programs. Over 160 researchers conduct pioneering research and share their acquired knowledge with society. More than 30 researchers are employed as professors at universities. The institute has generated twenty-one spin-off companies. CWI maintains excellent relations with industry and the academic world, both in the Netherlands as well as abroad. After their research careers at CWI, an increasing number of young staff members find employment in these sectors or in spin-off companies that are based on research results from CWI. Of course, library and computing facilities are first-rate. CWI's non-scientific services to its personnel include career planning, training and courses, assistance in finding housing, and tailor-made solutions to problems that may occasionally arise. TERMS AND CONDITIONS The terms of employment are in accordance with the Dutch Collective Labour Agreement for Research Institutes ("CAO-onderzoeksinstellingen"). Moreover CWI offers attractive working conditions, including flexible scheduling and help with housing for expat employees. The gross monthly salary, for an employee on a full time basis, is €2,037 during the first year and increases to €2,610 over a four year period. CWI also offers excellent and flexible terms of employment, including an employee pension fund. INFORMATION Additional information can be obtained from: dr. Stratos Idreos, email stratos.idreos(a)cwi.nl, telephone +31(0)20 592 4169. or dr. Stefan Manegold, email stefan.manegold(a)cwi.nl, telephone +31(0)20 592 4212, or prof. dr. Martin Kersten, email martin.kersten(a)cwi.nl, telephone +31(0)20 592 4066. APPLICATION Please send your application before 31 July 2011 to: pd(a)cwi.nl. Applications should include a detailed CV, a motivation letter, a list of your M.SC. courses and grades, a copy of your master thesis, and preferably a list of publications.

1 0

[Monetdb-announce] PhD position at CWI Database Architecture group
by Stefan Manegold 14 Jun '11

14 Jun '11

CWI is an internationally renowned research institute in mathematics and computer science, located in Amsterdam, The Netherlands. The focus is on fundamental research problems, inspired by societal needs. Research is carried out in 18 research groups and a substantial fraction is carried out in the framework of (inter)national programs. VACANCY CWI has a vacancy for a talented PhD candidate in the DB Architectures group (http://www.cwi.nl/en/research-groups/Database-Architectures) DISTRIBUTED DATABASE ARCHITECTURES FOR SCIENCE APPLICATIONS The Database Architectures group is one of the world-wide leading groups in system-oriented database research, e.g., it received the 10-year best paper award at VLDB 2009 for their pioneering research on hardware-aware database technology and the column-store model. The group has a unique methodology that combines fundamental database research with active participation of all group members in database engineering, centered around the open-source analytical database system MonetDB (http://www.monetdb.org/) You will be expected to write both papers and contribute to this code base. The focus of the group is on hard core data management and for this position specifically on database architectures to support large scale scientific applications in the context of the SciLens project (http://www.scilens.org) The goal is to leverage the potential power of a 330 node dedicated database machine to improve science in, e.g., astronomy and seismology. (http://www.scilens.org/content/platform) CWI maintains excellent relations with industry and the academic world, both in the Netherlands as well as abroad. An internship at one of the partnering database research labs world-wide is considered part of the PhD track. After their research careers at CWI, many staff members find employment in these sectors or in spin-off companies based on research results from CWI. Of course, library and computing facilities are first-class. CWI's non-scientific services to its personnel include career planning, training and courses, assistance in finding housing, and tailor-made solutions to problems that may occasionally arise. REQUIREMENTS The PhD candidates must have a master degree in computer science, (specialization distributed systems, database, software engineering) mathematics, or related fields. Preferable qualifications for candidates include proven research talent, system programming skills (C/C++), practical experience with database systems, and software development in a team. One should bring good academic writing and presentation skills. Candidates are expected to have an excellent command of English. TERMS AND CONDITIONS The terms of employment are in accordance with the Dutch "CAO-onderzoeksinstellingen". Moreover, CWI offers attractive working conditions, including flexibility and help with housing for foreigners. The gross monthly salary (on a full time basis) will be â¬ 2,037 during the first year and will reach â¬ 2,610 during the fourth year. INFORMATION Additional information can be obtained from prof.dr. Martin Kersten, email martin.kersten(a)cwi.nl, telephone +31(0)20 592 4066, or dr. Stefan Manegold, email stefan.manegold(a)cwi.nl, telephone +31(0)20 592 4212. -- | Stefan.Manegold @ CWI.nl | DB Architectures (INS1) | | http://CWI.nl/~manegold/ | Science Park 123 (L321) | | Tel.: +31 (0)20 592-4212 | 1098 XG Amsterdam (NL) |

1 0

[Monetdb-announce] Announcement: New Apr2011-SP1 bugfix release
by Fabian Groffen 31 May '11

31 May '11

The MonetDB team at CWI/MonetDB BV is pleased to announce the Apr2011-SP1 bugfix release of the MonetDB suite of programs. At the time of this release, we also officially changed to our new website at http://www.monetdb.org/. This new website is our central source of information, and comes with our new logo and style. For details on this release, please see the release notes at <http://www.monetdb.org/Downloads/ReleaseNotes>.

1 0

[Monetdb-announce] Announcement: New Apr2011 feature release of MonetDB suite
by Sjoerd Mullender 28 Apr '11

28 Apr '11

The MonetDB team at CWI/MonetDB BV is pleased to announce the Apr2011 feature release of the MonetDB suite of programs. As announced one month ago to the day (March 28, 2011), this release marks the start of a new era: development of MonetDB4 and MonetDB/XQuery has ceased. Development of the Pathfinder compiler continues unabated at the University of Tübingen [1], but there is no longer a link being maintained with MonetDB. For details on this release, please see the release notes at <http://monetdb.cwi.nl/Development/Releases/Apr2011/>. [1] http://www.pathfinder-xquery.org/ -- Sjoerd Mullender

1 0

[Monetdb-announce] Announcement: New Mar2011 feature release of MonetDB suite
by Sjoerd Mullender 28 Mar '11

28 Mar '11

The MonetDB team at CWI/MonetDB BV is pleased to announce the Mar2011 feature release of the MonetDB suite of programs. This release marks the last planned release of MonetDB4 and Pathfinder, and hence the last planned release of MonetDB/XQuery. Development of the Pathfinder compiler continues at the University of Tübingen. The next release, currently planned for April 2011, should be a smooth upgrade from this release, even if MonetDB/XQuery is installed (which will of course then not be upgraded). This release also marks the first release of the new way of building the MonetDB suite. For details on both these issues, and on the other features and bug fixes of this release, please see the release notes at <http://monetdb.cwi.nl/Development/Releases/Mar2011/>. As usual, the download location is <http://dev.monetdb.org/downloads/>. -- Sjoerd Mullender

1 0