Hi, MySQL has no ARRAY data type. In array is basicaly a nested table data type and MySQL doesn't support nested tables either, except through dynamic columns. So, a UDF that returned an array could only be used by other UDF that understand arrays. That isn't very useful. I see two options if you want to push this forward: a) If you want this to work with MySQL too (the UDF interface is identical) then pass data back as delimited text. For example, I have a UDF called RAPID_EXTRACT_ALL(..) which extracts all values for a key from a JSON document, and returns the values separated by newline. I have stored routines (or other UDF) that understand newline separated input (essentially arrays). I don't think you can do much better for MySQL at the moment. b) If you want to be compatible with only MariaDB, what you could do is return a BLOB that is properly formatted as a DYNCOL. This way COLUMN_GET, COLUMN_JSON, etc, could work on the blob, and there is a well defined interface for transmitting and accessing the data. Neither really require development on your part though, except to understand how to pack a DYNCOL blob properly. --Justin On Tue, Mar 10, 2015 at 11:28 AM, Delveri chick <chickdelveri@gmail.com> wrote:
Hi My name is Blessing Atie and i would love to participate in the Google summer of code 2015 under Mariadb. I am interested in the project UDF returning arrays. I have build mariadb from source and and i also ran the test suites. I am currently studing the sql/sql.** files to understand UDF's and i also downloaded some ebook on mysql internals and mysql plugin development which im reading while hoping to find a breakthrough on this project in them. I would love to know if there are any bugs related to this task on JIRA I could work on as a means of preparing for the project. Please give me the link.
Regards
_______________________________________________ Mailing list: https://launchpad.net/~maria-discuss Post to : maria-discuss@lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-discuss More help : https://help.launchpad.net/ListHelp