December 2006 - users-list

[MonetDB-users] SQL BLOB minor issue
by Ronald Oussoren 12 Dec '06

12 Dec '06

Hi, This is probably bad SQL-fu on my part, but you never know :-). I'm trying to insert a 0-byte blob into a table, but that doesn't work for me. The SQL code below fails on the second insert, the database complains about a bad blob syntax. Inserting an implicit NULL into a BLOB colum also fails (the 3th insert), even though inserting an explicit NULL (the fourth one) does succeed. CREATE TABLE testtable ( id INTEGER data BLOB ); INSERT INTO testtable (id, data) VALUES (0, BLOB '00'); INSERT INTO testtable (id, data) VALUES (1, BLOB ''); INSERT INTO testtable (id) VALUES (2); INSERT INTO testtable (id, data) VALUES (2, NULL); Regards, Ronald

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Re: [MonetDB-users] Large transactions or large updates
by Ronald Oussoren 12 Dec '06

12 Dec '06

On 21 Nov 2006, at 2:57 PM, Ronald Oussoren wrote: > > I'll see if I can create a script that demonstrates the problem, I found the problem, my data was not as clean as I expected and I tried to insert a non-ascii value into a string column in the database. That still leaves the lame error reporting (raising RuntimeError (None)) in the MonetSQLdb wrappers. The MapiClient does report a useful error and I've tried to compare this with the Python bindings. It turns out that the error-checking code in the python binding has ample room for improvement. I debugged my code by adding calls to mapi_error, mapi_result and mapi_explain_query to the C code of the mapi_query wrapper, but that's obviously not the right solution. Ronald

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Re: [MonetDB-users] Using MonetDB / XQuery with PHP
by Menno Holtkamp 12 Dec '06

12 Dec '06

[snip] > I see. This is probably because the default XQuery output is a wee bit > different. ;) I might be able to fix monetdb_php to support XQuery like > JDBC does. Unfortunately I don't have too much time this and next week, > so the fix will have to wait a bit. I'll try and see in the weekend if > I can easily fix it. Did somebody already found some spare time to have glance at the PHP support for XQuery? I'm using a quite dirty hack to get it working right now... Cheers

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by authored Leo 11 Dec '06

11 Dec '06

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by desire ea 07 Dec '06

07 Dec '06

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[MonetDB-users] transaction concurrency
by Ronald Oussoren 05 Dec '06

05 Dec '06

Hi, I'm using monetdb's SQL frontend through the python bindings (with minor patches to make it behave more like the DB-API specifies, and a patch to print error information because MonetSQLdb raises 'RuntimeError, None' when the database returns an error). I'm now running into yet another problem: I have an import process that imports large sets of records in a single transaction per dataset. This works fine (after fixing some problems in my code). However, when I perform other transactions during an "import" transactions the import tranaction fails hard even if those transactions only read from the database and only touch tables that aren't touched by the import script. I'm not at my development machine at the moment, but I'll post an example script and the exact error I'm getting when I'm back. Ronald P.S. This is using a recent build of a daily snapshot from the 2.14/4.14 branch.

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[MonetDB-users] cfourses zcourses czourses
by vjrus 04 Dec '06

04 Dec '06

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[MonetDB-users] Bulk load error in Windows 2000
by JLP00993＠correo.aeat.es 01 Dec '06

01 Dec '06

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