January 2008 - users-list

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

11 Aug '24

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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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[MonetDB-users] (no subject)
by Matt Magoffin 11 Aug '08

11 Aug '08

Hello, I am interested in evaluating MonetDB/XQuery. I have some XML collections for a project I work on that are of 1-2 million individual XML documents for which I use XQuery to access for OLAP style reporting operations. This is a Java-based project, and while working on this project I developed a thin XQuery-centric API so that I could evaluate/use many different XQuery implementations, which my company released as an open source project called Xaj (http://sourceforge.net/projects/xaj) Currently I am using a Berkeley DB XML implementation, but am interested in exploring other options. I'd like to implement a MonetDB version of this API now, but I am having some difficulty finding out how to effectively access MonetDB through Java. So far I was able to use the MonetDB JDBC driver to construct XQuery statements and get XML results, and also I was able to construct MonetDB pf:add-doc() statements to add documents, but I am wondering if this is the best approach (and if so, how to add documents to a remote MonetDB server using the pf:add-doc() mechanism). The API I am trying to implement you can view here, to give you an idea what I'm trying to do: http://xaj.svn.sourceforge.net/viewvc/xaj/xaj/src/net/sf/xaj/XmlDb.java?rev… It was somewhat modeled after the defunct XML:DB API, but focused just on add/store/XQuery operations. Any help/advise would be greatly appreciated! -- m@

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[MonetDB-users] db log shrink
by Colin Foss 17 Apr '08

17 Apr '08

Is there any method, besides restarting the database, of shrinking the sql log file? When I am performing a large set of large inserts (via COPY INTO) the log file gets very large. I wish there was a way to cycle the log file. Also during these large batches of inserts the database server becomes less and less responsive until I am forced to restart the server. Upon restart and the normal recovery monet returns to a very responsive state.

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[MonetDB-users] JDBC insert performance
by chinarinde 11 Mar '08

11 Mar '08

Hi all, I am new to monetDB and ran into the following problem (I'll try to be as verbose as I can, perhaps it helps helping me): I've installed MonetDB server 5.0.0, clients and commons 1.18.2 and sql 2.18.2 on Ubuntu Feisty. Then I've taken the JDBC example which is available online and modified it to be able to insert data into a test database. More specifically I'm using prepared statements and executeBatch() together with the monetdb-1.6 JDBC driver. Which is quite successful until about 5 million records are inserted - afterwards the speed of the inserts drops dramatically. I've experimented with different batch sizes (10000 records seems to work ok), and I've tried to understand the chapter about memory tuning for MonetDB (not sure yet about how to use mem_cursize() though). In any case at first inserting 2 million records only takes about 5 minutes (measured with Javas System.timemillis), later on this time increases and the server gets rather unresponsive. I found only two posts concerning the speed of JDBC inserts (from January 2007 I think) and I would be interested if a solution or explanation has been found off-list. Thank you -- View this message in context: http://www.nabble.com/JDBC-insert-performance-tf4589411.html#a13100422 Sent from the monetdb-users mailing list archive at Nabble.com.

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[MonetDB-users] embedded SQL server under Windows
by Grigorio V. Moshkin 04 Feb '08

04 Feb '08

Hi, I've installed MonetDB/SQL/32bit under Windows, but I can't find DLL or LIB for embedded server. Although, MonetDB documentation mentioned embedded libraries for UNIX-like system: http://monetdb.cwi.nl/projects/monetdb/MonetDB/Documentation/A-Simple-Examp… But, what about Windows? Can I use MonetDB under Windows in embedded mode?

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[MonetDB-users] How to reset the password for a DB Insatnce
by sateesh 01 Feb '08

01 Feb '08

Hi All, How can i reset the password for a given DB Instance. Some how the default password monetdb is not getting accepted.. Thanks Sateesh -- View this message in context: http://www.nabble.com/How-to-reset-the-password-for-a-DB-Insatnce-tp1519457… Sent from the monetdb-users mailing list archive at Nabble.com.

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[MonetDB-users] JDBC Driver Problem with the new Build..
by sateesh 01 Feb '08

01 Feb '08

HI All, We got the latest build and the JDBC Driver seems to be giving lot of problems.. When i try to view the tables for a given schema it doesn't show any even if there are tables. ( if i execute a select query it returns the results..) Also when i execute a query i am getting the following Error after the results.. [ERROR] Exception in ResultSet for "MYSCHEMA" java.sql.SQLException: Method not implemented yet, sorry! at nl.cwi.monetdb.jdbc.MonetResultSet.getCharacterStream(MonetResultSet.java:294) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at com.quantum.util.proxy.ProxyFactory$InvocationHandlerImpl.invoke(ProxyFactory.java:37) at $Proxy3.getCharacterStream(Unknown Source) at com.quantum.sql.SQLStandardResultSetResults.getStringFromCharacterSteam(SQLStandardResultSetResults.java:250) at com.quantum.sql.SQLStandardResultSetResults.parseResultSet(SQLStandardResultSetResults.java:147) at com.quantum.sql.SQLStandardResultSetResults.create(SQLStandardResultSetResults.java:69) at com.quantum.sql.MultiSQLServer.execute(MultiSQLServer.java:139) at com.quantum.sql.MultiSQLServer.execute(MultiSQLServer.java:91) at com.quantum.actions.BaseExecuteAction.getSQLResults(BaseExecuteAction.java:202) at com.quantum.actions.BaseExecuteAction.execute(BaseExecuteAction.java:174) at com.quantum.actions.ExecuteAction.execute(ExecuteAction.java:98) at com.quantum.actions.BaseExecuteAction.execute(BaseExecuteAction.java:125) at com.quantum.actions.BaseExecuteAction.run(BaseExecuteAction.java:111) at org.eclipse.ui.actions.BaseSelectionListenerAction.runWithEvent(BaseSelectionListenerAction.java:168) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:545) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:490) at org.eclipse.jface.action.ActionContributionItem$6.handleEvent(ActionContributionItem.java:443) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1101) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3319) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2971) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219) at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:153) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:504) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:443) at org.eclipse.equinox.launcher.Main.run(Main.java:1169) [/ERROR] thanks sateesh -- View this message in context: http://www.nabble.com/JDBC-Driver-Problem-with-the-new-Build..-tp15205660p1… Sent from the monetdb-users mailing list archive at Nabble.com.

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[MonetDB-users] ALTER TABLE doesn't work in MonetDB !!
by sateesh 30 Jan '08

30 Jan '08

Hi All, I am trying to add columns at the run time to one of the Tables and i am getting an error No Such Table. But when i try to select values from the table i get the values ( there are no rows in this table and no key columns as well..) Here is the Error: [CODE] Error Executing: ALTER TABLE collection_1234.collection_info add customer_a_name varchar(256):java.sql.SQLException: ALTER TABLE: no such table 'collection_info' java.sql.SQLException: ALTER TABLE: no such table 'collection_info' at nl.cwi.monetdb.jdbc.MonetConnection$ResponseList.executeQuery(MonetConnection.java:2048) at nl.cwi.monetdb.jdbc.MonetConnection$ResponseList.processQuery(MonetConnection.java:1798) at nl.cwi.monetdb.jdbc.MonetStatement.internalExecute(MonetStatement.java:371) at nl.cwi.monetdb.jdbc.MonetStatement.execute(MonetStatement.java:340) at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at com.quantum.util.proxy.ProxyFactory$InvocationHandlerImpl.invoke(ProxyFactory.java:37) at $Proxy4.execute(Unknown Source) at com.quantum.sql.MultiSQLServer.execute(MultiSQLServer.java:133) at com.quantum.sql.MultiSQLServer.execute(MultiSQLServer.java:91) at com.quantum.actions.BaseExecuteAction.getSQLResults(BaseExecuteAction.java:202) at com.quantum.actions.BaseExecuteAction.execute(BaseExecuteAction.java:174) at com.quantum.actions.ExecuteAction.execute(ExecuteAction.java:98) at com.quantum.actions.BaseExecuteAction.execute(BaseExecuteAction.java:125) at com.quantum.actions.BaseExecuteAction.run(BaseExecuteAction.java:111) at org.eclipse.ui.actions.BaseSelectionListenerAction.runWithEvent(BaseSelectionListenerAction.java:168) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:545) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:490) at org.eclipse.jface.action.ActionContributionItem$6.handleEvent(ActionContributionItem.java:443) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1101) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3319) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2971) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219) at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:153) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:504) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:443) at org.eclipse.equinox.launcher.Main.run(Main.java:1169) SQL (DPACUSTOMER1) [select * from collection_1234.collection_info] Success: result set displayed [/CODE] Is this a bug or am i missing some thing ?? Thanks Sateesh -- View this message in context: http://www.nabble.com/ALTER-TABLE-doesn%27t-work-in-MonetDB-%21%21-tp151680… Sent from the monetdb-users mailing list archive at Nabble.com.

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