Re: sqlite: foreign keys
Le 28 sept. 2010 à 23:59, Monte Goulding a écrit : Just use an in-memory db. ooo, that's a new one to me. Is it possible to write it out to a file later? Hi, Running SQLite without a database file creates an in-memory database. Using the .dump command will dump that in-memory DB to a SQL file that can then be re-read into a file-backed database (or back into a memory database) But Sqlite caches data in memory so a file based database and memory based perform much the same. Well, depends of what you want to achieve... HTH Thierry ___ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
Re: sqlite: foreign keys
On Sep 25, 2010, at 3:42 PM, David Bovill wrote: A quick geeky question: does anyone know if foreign key support has been turned on for the recent sqlite driver I don't think you need to turn it on when compiling. It is a pragma setting: http://www.sqlite.org/pragma.html#pragma_foreign_keys Untested but try this: revExecuteSQL theConnectionID, PRAGMA foreign_keys = true -- Trevor DeVore Blue Mango Learning Systems ScreenSteps: http://www.screensteps.com Releasable Revolution Resources for Developers: http://revolution.bluemangolearning.com ___ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
Re: sqlite: foreign keys
I think the issue is whether the version of the sqlite drivers in LiveCode are up to date enough to include foreign key support at all. According to http://www.sqlite.org/foreignkeys.html, foreign keys were supported as of SQlite version 3.6.19 but I don;t know how to find out what version of sqlite is included with LiveCode. If foreign key support is included, it's off by default so you do have to enable it as detailed by Trevor. Pete Haworth On Sep 28, 2010, at 10:00 AM, use-revolution-requ...@lists.runrev.com wrote: Message: 14 Date: Tue, 28 Sep 2010 07:53:40 -0400 From: Trevor DeVore li...@mangomultimedia.com Subject: Re: sqlite: foreign keys To: How to use Revolution use-revolution@lists.runrev.com Message-ID: 3f385a2b-214c-4867-8af6-08887fe46...@mangomultimedia.com Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes On Sep 25, 2010, at 3:42 PM, David Bovill wrote: A quick geeky question: does anyone know if foreign key support has been turned on for the recent sqlite driver I don't think you need to turn it on when compiling. It is a pragma setting: http://www.sqlite.org/pragma.html#pragma_foreign_keys Untested but try this: revExecuteSQL theConnectionID, PRAGMA foreign_keys = true -- Trevor DeVore Blue Mango Learning Systems ScreenSteps: http://www.screensteps.com Releasable Revolution Resources for Developers: http://revolution.bluemangolearning.com ___ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
Re: sqlite: foreign keys
On Sep 28, 2010, at 1:32 PM, Peter Haworth wrote: I think the issue is whether the version of the sqlite drivers in LiveCode are up to date enough to include foreign key support at all. According to http://www.sqlite.org/foreignkeys.html, foreign keys were supported as of SQlite version 3.6.19 but I don;t know how to find out what version of sqlite is included with LiveCode. If foreign key support is included, it's off by default so you do have to enable it as detailed by Trevor. 4.5 comes with 3.6.22. You can check the version of SQLite included with the IDE by placing the following in a card script of a stack in your plugin folder. Just make sure the card has a single field on it. on preopenCard put specialfolderpath(temporary) into theFolder put theFolder / the milliseconds .db into theFile put revOpenDatabase(sqlite,theFile) into theConn put revDataFromQuery(tab, cr, theConn, SELECT sqlite_version()) into theData revCloseDatabase theConn put Installed SQLite version: theData into fld 1 delete file theFile end preopenCard -- Trevor DeVore Blue Mango Learning Systems ScreenSteps: http://www.screensteps.com Releasable Revolution Resources for Developers: http://revolution.bluemangolearning.com ___ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
Re: sqlite: foreign keys
On Sep 28, 2010, at 2:01 PM, Trevor DeVore wrote: on preopenCard put specialfolderpath(temporary) into theFolder put theFolder / the milliseconds .db into theFile put revOpenDatabase(sqlite,theFile) into theConn put revDataFromQuery(tab, cr, theConn, SELECT sqlite_version()) into theData revCloseDatabase theConn put Installed SQLite version: theData into fld 1 delete file theFile end preopenCard Actually, you don't even need the temporary file. Just use an in- memory db. on preopenCard put revOpenDatabase(sqlite,) into theConn put revDataFromQuery(tab, cr, theConn, SELECT sqlite_version()) into theData revCloseDatabase theConn put Installed SQLite version: theData into fld 1 end preopenCard -- Trevor DeVore Blue Mango Learning Systems ScreenSteps: http://www.screensteps.com Releasable Revolution Resources for Developers: http://revolution.bluemangolearning.com Email has been scanned for viruses by Altman Technologies' email management service - www.altman.co.uk/emailsystems ___ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
Re: sqlite: foreign keys
Whaaa?? There's a such thing as an In Memory DB?? Wow! Nice tip! Bob On Sep 28, 2010, at 11:05 AM, Trevor DeVore wrote: Actually, you don't even need the temporary file. Just use an in-memory db. ___ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
Re: sqlite: foreign keys
Just use an in-memory db. ooo, that's a new one to me. Is it possible to write it out to a file later? -- Monte Goulding M E R Goulding Software Development Bespoke application development for vertical markets InstallGadget - How to create an installer in 10 seconds revObjective - Making behavior scripts behave ___ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
sqlite: foreign keys
A quick geeky question: does anyone know if foreign key support has been turned on for the recent sqlite driver - http://www.hwaci.com/sw/sqlite/foreignkeys.html? ___ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
