Re: [Drizzle-discuss] how to add field column in storage engine?
Thanks for your tip, Stewart. I am able to implement this functionality. Though it seems kind of hack, but it works, it can read '/proc/meminfo' directly. On Wed, Jul 7, 2010 at 1:49 PM, Stewart Smith stew...@flamingspork.comwrote: On Tue, 6 Jul 2010 14:08:08 +0800, ZQ zim...@gmail.com wrote: This requirement does seem a little odd. This scenario comes from my file system storage engine when I try to read files as /proc/meminfo, I would like it to be transposed, so that MemTotal, MemFree and other would become columns, then user can just use the statement as 'select MemTotal from t1'. Otherwise, there will be only two columns for this file. What do you think, Stewart? I think it's a useful feature. you should be able to do this during gettabledefinition, just discover what fields there are and populate the proto with them. -- Stewart Smith ___ Mailing list: https://launchpad.net/~drizzle-discuss Post to : drizzle-discuss@lists.launchpad.net Unsubscribe : https://launchpad.net/~drizzle-discuss More help : https://help.launchpad.net/ListHelp
Re: [Drizzle-discuss] how to add field column in storage engine?
On Mon, Jul 5, 2010 at 10:15 AM, Stewart Smith stew...@flamingspork.comwrote: On Wed, 30 Jun 2010 15:36:44 +0800, Zimin zim...@gmail.com wrote: I'm considering whether it's possible to add a field column in storage engine? If yes, which function should I invoke? Or hack into protobuf? as in one that the user didn't specify in CREATE TABLE? You'd add it to the proto, but I'd also have to ask why? -- Stewart Smith Hi Stewart, This requirement does seem a little odd. This scenario comes from my file system storage engine when I try to read files as /proc/meminfo, I would like it to be transposed, so that MemTotal, MemFree and other would become columns, then user can just use the statement as 'select MemTotal from t1'. Otherwise, there will be only two columns for this file. What do you think, Stewart? --Zimin ___ Mailing list: https://launchpad.net/~drizzle-discuss Post to : drizzle-discuss@lists.launchpad.net Unsubscribe : https://launchpad.net/~drizzle-discuss More help : https://help.launchpad.net/ListHelp
Re: [Drizzle-discuss] how to add field column in storage engine?
On Tue, 6 Jul 2010 14:08:08 +0800, ZQ zim...@gmail.com wrote: This requirement does seem a little odd. This scenario comes from my file system storage engine when I try to read files as /proc/meminfo, I would like it to be transposed, so that MemTotal, MemFree and other would become columns, then user can just use the statement as 'select MemTotal from t1'. Otherwise, there will be only two columns for this file. What do you think, Stewart? I think it's a useful feature. you should be able to do this during gettabledefinition, just discover what fields there are and populate the proto with them. -- Stewart Smith ___ Mailing list: https://launchpad.net/~drizzle-discuss Post to : drizzle-discuss@lists.launchpad.net Unsubscribe : https://launchpad.net/~drizzle-discuss More help : https://help.launchpad.net/ListHelp
Re: [Drizzle-discuss] how to add field column in storage engine?
On Wed, 30 Jun 2010 15:36:44 +0800, Zimin zim...@gmail.com wrote: I'm considering whether it's possible to add a field column in storage engine? If yes, which function should I invoke? Or hack into protobuf? as in one that the user didn't specify in CREATE TABLE? You'd add it to the proto, but I'd also have to ask why? -- Stewart Smith ___ Mailing list: https://launchpad.net/~drizzle-discuss Post to : drizzle-discuss@lists.launchpad.net Unsubscribe : https://launchpad.net/~drizzle-discuss More help : https://help.launchpad.net/ListHelp
[Drizzle-discuss] how to add field column in storage engine?
Hi list, I'm considering whether it's possible to add a field column in storage engine? If yes, which function should I invoke? Or hack into protobuf? Thanks. --zimin ___ Mailing list: https://launchpad.net/~drizzle-discuss Post to : drizzle-discuss@lists.launchpad.net Unsubscribe : https://launchpad.net/~drizzle-discuss More help : https://help.launchpad.net/ListHelp
