December 2019 - users-list

[MonetDB-users] Books CDs
by CHARTS LICENSING 11 Aug '24

11 Aug '24

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Multi-column update based on joined table
by Lee Hachadoorian 11 Aug '24

11 Aug '24

I need to update multiple columns (~250) from one table to another based on a two-column key. In Postgres I would write this using the FROM clause, but since MonetDB doesn't support the FROM clause, I've successfully updated one column with: UPDATE census.acs2010_5yr SET b07401001 = ( SELECT CAST(b07401001 AS int) FROM acs2010_5yr.tmp_seq0001 WHERE acs2010_5yr.stusab = tmp_seq0001.stusab AND acs2010_5yr.logrecno = tmp_seq0001.logrecno ); My question is whether there is any benefit to writing a multiple column update into a single UPDATE statement: UPDATE target_table SET column1 = (SELECT column1 FROM source_table WHERE target_table.key = source_table.key), column2 = (SELECT column2 FROM source_table WHERE target_table.key = source_table.key), ..., columnN = (SELECT columnN FROM source_table WHERE target_table.key = source_table.key); On Postgres I believe the multi-column update using a table join would only have to do the sequential scan of each table once, but with the necessity of sub-selects in MonetDB, what is the backend doing? Is it already doing an index scan once for each row in the single column case, then doing it once for each row * column in the multi-column case? Best, --Lee -- Lee Hachadoorian Asst Professor of Geography, Dartmouth College http://freecity.commons.gc.cuny.edu/

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[MonetDB-users] XQuery API and XLink/XUpdate support
by Alexandra Mart�nez 27 Jun '24

27 Jun '24

Hello all, I was wondering if there is any documentation about the API for XQuery (i.e., how to write xqueries from a Java program). Also, I am interested in using some features of XLink and XUpdate on top of my XML database. Is support for any of these in progress? Thanks in advance, Alexandra ______________________________________________________ Click here to donate to the Hurricane Katrina relief effort. http://store.yahoo.com/redcross-donate3/

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[MonetDB-users] Proofreading your professional documents
by Richard Hounslow 24 Feb '24

24 Feb '24

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pymonetdb issue
by ALEX OSSIPOV 04 Feb '20

04 Feb '20

Hi All I installed pymonetdb v 1.2.1 and trying to connect to remote server MonetDB v11.35.3 (Nov2019) listening on IPV6 only. I have got next error in python client: >>> mapi_connection.connect(hostname="<server_name>", port=xxxxx, username="monetdb", password="monetdb", database="demo", language="sql", unix_socket=None, connect_timeout=-1) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python3.7/site-packages/pymonetdb/mapi.py", line 143, in connect self.socket.connect((hostname, port)) socket.gaierror: [Errno -2] Name or service not known >>> My pc client is also using ipv6 to connect to MonetDB server. I also have jdbc connection that works fine. Question: Does it mean pymonetdb does not support ipv6 only environment? What would be the reason if it has nothing to do with protocol? Thanks Alex

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Announcement: New Nov2019-SP1 Bugfix release of MonetDB suite
by Sjoerd Mullender 20 Dec '19

20 Dec '19

The MonetDB team at CWI/MonetDB BV is pleased to announce the Nov2019-SP1 bugfix release of the MonetDB suite of programs. More information about MonetDB can be found on our website at <https://www.monetdb.org/>. For details on this release, please see the release notes at <https://www.monetdb.org/Downloads/ReleaseNotes>. As usual, the download location is <https://dev.monetdb.org/downloads/>. Nov 2019-SP1 bugfix release (11.35.9) Bug Fixes * 6723: columns aliases duplicates should not be allowed. automatic aliasing required. * 6724: Prepare confuses types when more than one argument is used * 6726: Python aggregation does not create aggr_group when aggregating over all rows * 6765: GRANT SELECT privilege on a subset of table columns results in access denied error when selecting the same columns from the table * 6790: Count distinct giving wrong results * 6791: str_to_time('11:40', '%H:%M') creates wrong time value * 6792: JSON path compiler accepts invalid input * 6793: cast(interval second value to int or decimal) is wrong (by a factor of 1000), cast(interval month value to decimal or floating point) fails * 6794: external name fits.listdir not bound (sys.listdir) Fatal error during initialization: * 6796: Incorrect crash time reported by monetdb tool after crash of mserver5 * 6798: json.text off by one error * 6804: DNS resolution of 0.0.0.0 fails on recent Ubuntus

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resetting credentials from mserver5?
by Jonathan Speiser 20 Dec '19

20 Dec '19

Hello, I had tried changing the password on my monetdb server (MonetDB 5 server v11.29.3 "Mar2018") but after rebooting it seems I am locked out from mclient. Is there any way I can change the monetdb user password from mserver5? Thank you for your help Jon

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starting database 'tpch'... FAILED
by DEMBELE Simon Pierre 16 Dec '19

16 Dec '19

-------- Original Message -------- Subject: starting database 'tpch'... FAILED Date: 16/12/2019 12:58 From: DEMBELE Simon Pierre <simon-pierre.dembele(a)ensma.fr> To: mailman-owner(a)monetdb.org Bonjour, Hello I need help; Why can solve this issue starting database 'tpch'... FAILED start: starting 'tpch' failed: database 'tpch' has crashed after starting, manual intervention needed, check monetdbd's logfile (merovingian.log) for details Thank -- Simon

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MERGE TABLE - CANNOT DROP PARTITION
by Ariel Abadi 10 Dec '19

10 Dec '19

Hi! I'm still having issue dropping internal tables from the MERGE TABLE. I used to have this problem on a previous version. I have created a new DB, imported all the data... and now I need to delete a partition (NOT a table). I'm still facing the same problem, which is that I cannot remove it from the merge table. (as you can see below).. Is there anything I can do? Rgds Ariel Welcome to mclient, the MonetDB/SQL interactive terminal (Apr2019) Database: MonetDB v11.33.3 (Apr2019), 'mapi:monetdb://dt-mn:54321/cli_dg' Type \q to quit, \? for a list of available commands auto commit mode: on sql>ALTER TABLE sb_traf.cub15_cubo DROP TABLE sb_traf.cub8_20190801; operation successful sql>ALTER TABLE sb_traf.cub15_cubo DROP TABLE sb_traf.cub8_20190801; operation successful sql>ALTER TABLE sb_traf.cub15_cubo DROP TABLE sb_traf.cub8_20190801; operation successful sql>ALTER TABLE sb_traf.cub15_cubo DROP TABLE sb_traf.cub8_20190801; operation successful sql>ALTER TABLE sb_traf.cub15_cubo DROP TABLE sb_traf.cub8_20190801; operation successful sql>ALTER TABLE sb_traf.cub15_cubo DROP TABLE sb_traf.cub8_20190801; operation successful sql>ALTER TABLE sb_traf.cub15_cubo DROP TABLE sb_traf.cub8_20190801; operation successful sql>ALTER TABLE sb_traf.cub15_cubo DROP TABLE sb_traf.cub8_20190801; operation successful

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CREATE DATABASE
by Ariel Abadi 09 Dec '19

09 Dec '19

Hi! Im trying to start a new fresh database .. I am creating with the following commands: monetdbd create /opt/starbi/mm/ monetdbd start /opt/starbi/mm/ monetdb create cli_dg monetdb start cli_dg When I try to start the new database... the database is NOT starting. starting database 'cli_dg'... FAILED start: starting 'cli_dg' failed: database 'cli_dg' has crashed after starting, manual intervention needed, check monetdbd's logfile (merovingian.log) for details *Here is the log:* 2019-12-09 15:59:07 MSG cli_dg[385]: # loading sql script: 72_fits.sql 2019-12-09 15:59:07 ERR cli_dg[385]: #main thread:!ERROR:ParseException:SQLparser:3F000!CREATE PROCEDURE: external name fits.listdir not bound (sys.listdir) 2019-12-09 15:59:07 ERR cli_dg[385]: ParseException:SQLparser:3F000!CREATE PROCEDURE: external name fits.listdir not bound (sys.listdir)Fatal error during initialization: 2019-12-09 15:59:07 ERR cli_dg[385]: ParseException:SQLparser:3F000!CREATE PROCEDURE: external name fits.listdir not bound (sys.listdir) 2019-12-09 15:59:11 MSG merovingian[370]: database 'cli_dg' (385) has exited with exit status 1 2019-12-09 15:59:11 ERR control[370]: (local): failed to fork mserver: database 'cli_dg' has crashed after starting, manual intervention needed, check monetdbd's logfile (merovingian.log) for details Can you please help!?

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