Re: CSV import / export - Mailing list pgadmin-hackers
From | Guillaume Lelarge |
---|---|
Subject | Re: CSV import / export |
Date | |
Msg-id | 492E5E11.9050106@lelarge.info Whole thread Raw |
In response to | CSV import / export ("Robins Tharakan" <tharakan@gmail.com>) |
List | pgadmin-hackers |
Robins Tharakan a écrit : > [...] > While looking at the PgAdmin ToDo list, I saw CSV import as one of the > things to do. I just wanted to ask a few things before starting work on > it, so as to ensure that it's envisioned in the way I plan to work on it. > > * Apart from CSV import, are we planning to add an 'export' to CSV > via the Backup dialog box ? I don't think this is quite the same thing. I would prefer to see a specific Export menu item in the contextual menu. It would allow to export datas from view. > (We could add a 'CSV radio button' > under 'Format' and change the radio buttons below to things like > 'Include headers, column separators, etc...). This seems good to me, but not in the Backup dialog. > But importantly, > since its not mentioned in the ToDo, is an export to CSV (of a > single table) even on the cards ? Yes, yes, yes :) > Frankly I ask this also because > currently the only way to export a table in CSV is to do a 'SELECT > * FROM table' in SQL query box and save to file, which is quite > lengthy a process. You're right. And it would be great too to be able to export to other formats than CSV. > * I read a bit about wxWidgets and didn't see any relevant libraries > there. Are there any 'obvious' libraries (in wxWidgets or > otherwise) that I should use to parse csv into an array ? For e.g. > PHP has a pretty neat function like fgetcsv ... that converts a > csv file to an array of arrays. Anything similar to that, or > should I have to make that myself ? None that I know. > * I have outlined a few details of Import to CSV, please feel free > to change (or completely rewrite :) the way it should work. I'll > try and attempt this if no one else is working on it right now. > > > Import to CSV: > > 1. 'Restore' option when one right-clicks on a table name, should > allow for importing via CSV. A radio button above the file > selection defaults to a 'Backup' file, but has an extra added > option of a 'CSV file' along with it. As for export, I would prefer a specific Import menu item. > 2. (While importing from a CSV file) A set of preferences that could > allow a user to alter CSV import preferences. For e.g. > column-separator, line-separators, 'include headers' etc.. > (Personally I'd prefer defaults to these to be modifyable, but > File-Options-Preferences is too generic for these settings. Any > better place for such options ?) Preferences seems the better place to me. > 3. During import, if an error occurs, A dialogue box is thrown that > provides for three options. Either mute successive errors if any, > keep showing them, or altogether stop the import. > I think you should have a look at pgloader (http://pgfoundry.org/projects/pgloader/), at least to get some ideas of the difficulties it will bring. This projet is written in Python and tries to ease a restore from a CSV file to a PostgreSQL table. Last but not least, I think you should work with Quan who also expresses his wishes to work on this TODO item (see this thread: http://archives.postgresql.org/pgadmin-hackers/2008-11/msg00099.php). -- Guillaume. http://www.postgresqlfr.org http://dalibo.com
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