Re: [Maria-discuss] R: GSOC 2015 :UDFs returning arrays
Hi, Right, my point was that UDF (classical UDF) really can't do arrays or table functions, you need a different type of UDF, and external procs are one type of new udf. The other type of new UDF I would like to see my s Antony's other patch I linked to, which adds pluggable item functions. Such functions could also use the same table function interface (be it via generator or temp table, or whatever). The biggest advantage over classic UDF is that pluggable item functions get a THD, can use SQL security, properly deal with character sets, etc, and it is a small patch. I'd kind of like two or three type of table func: One returns a SQL statement and is evaluated like a dependent subquery - it doesn't have to be materialized, but if it is, it can be indexed. This is like a dynamic view which is difficult to do without ugly hacks. His would be the easiest to implement. Another type would returns a temporary table name, and the temp table is used in the query. These would be evaluated at start of execution like old dependent subqueries. This would allow table functions with a varying number of columns, or that essentially can return more than one data type based in the input. While conceptually similar to the first type, this type can get data from external sources and store it in the table. The temporary would be dropped in deinit() function. Finally, generator functions would use fixed schema and could return big data sets, but they probably can't open any tables without locking problems (all table locks must be taken at query execution start). I hope that makes sense. Sent from my iPhone On Mar 11, 2015, at 7:35 AM, Sergei Golubchik s...@mariadb.org wrote: Hi, Justin! On Mar 10, Justin Swanhart wrote: wl#820 also has table functions in it: http://antbits.blogspot.com/2009/01/table-functions-in-mysql.html mysql INSTALL PLUGIN Deep_Thought SONAME 'psm_example.so'; mysql CREATE FUNCTION test.FooAnswer() - RETURNS TABLE(answer TEXT) - NO SQL LANGUAGE Deep_Thought EXTERNAL NAME 'compute'; mysql CREATE VIEW foobar AS SELECT * FROM TABLE(test.FooAnswer) AS wibble; mysql SELECT * FROM foobar WHERE answer LIKE 'F%'; +---+ | answer| +---+ | Forty-Two | +---+ Ah, indeed. Thanks. It's still an unrelated feature - I mean, there is no reason why a table function must necessarily be impemented as an external procedure. And the implementation - I believe - creates a temporary table and puts all the data into it. I would rather prefer a generator-like interface, that produces rows one by one. It works much better for big data sets. Or, may be, we can do both. Either way - this implementation can be very helpful. But it'll need at least to be updated to work in 10.1. And may be we add the generator interface. Regards, Sergei ___ 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
Re: [Maria-discuss] Enabling feedback pluging for MariaDB 10.1.4
I understand that the statistics would have some meaning, and understand that there's no actual data being sent, etc. However, enabling the feedback plugin by default IS going to create a whole lot of negative publicity for MariaDB. Is the limited data the feedback plugin provides worthwhile? Look at the similar situation with Ubuntu/Canonical. No matter how much they argued there was no real risk, they suffered a huge amount of negative publicity and eventually reversed the decision. You can argue that the data passed in that case was far more invasive and that they're unrelated, but there WILL be people who have a valid reason to be upset that their IP etc. has been unknowingly passed on, and saying that you should have switched it off or you shouldn't have been using a beta version is not a valid response after the fact. And then there will be even more people who have no reason to be upset, but will be anyway. Why go through this pain? Rather use this as an opportunity to create a thorough survey (which can provide far more detailed and useful information than the plugin running on a beta version) and engage constructively with the community. The survey has other benefits too, as pointed out elsewhere in the thread - raising awareness of lesser-known features, and just spreading the survey will be marketing for MariaDB. And by all means, give people an option to enable the plugin on installation, as long as it defaults to off. ian On 10/03/2015 13:54, Sergei Golubchik wrote: A survey is a pretty good idea, thanks! It may not provide a much better (as in representative sample) statistics, but it will surely tell the users about the features. ___ 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
[Maria-discuss] MariaDB Galera Cluster 10.0.17 and 5.5.42 now available
The MariaDB project is pleased to announce the immediate availability of MariaDB Galera Cluster 10.0.17 5.5.42 Both are Stable (GA) releases. See the Release Notes and Changelog for details. - - Links - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - MariaDB Galera Cluster 10.0.17 - Release Notes: https://mariadb.com/kb/en/mariadb-galera-cluster-10017-release-notes/ - Changelog: https://mariadb.com/kb/en/mariadb-galera-cluster-10017-changelog/ - Downloads: https://downloads.mariadb.org/mariadb-galera/10.0.17 MariaDB Galera Cluster 5.5.42 - Release Notes: https://mariadb.com/kb/en/mariadb-galera-cluster-5542-release-notes/ - Changelog: https://mariadb.com/kb/en/mariadb-galera-cluster-5542-changelog/ - Downloads: https://downloads.mariadb.org/mariadb-galera/5.5.42 About MariaDB Galera Cluster: - https://mariadb.com/kb/en/what-is-mariadb-galera-cluster/ APT and YUM Repository Configuration Generator: - https://downloads.mariadb.org/mariadb/repositories/ - - MariaDB Webinars - - - - - - - - - - - - - - - - - - - - - - - - - There are several upcoming MariaDB-focused webinars and many previously held ones available to watch on an on-demand basis at: - https://mariadb.com/news-events/webinars - - MariaDB Books - - - - - - - - - - - - - - - - - - - - - - - - - - There is an ever-growing library of MariaDB books available to help you get the most out of MariaDB. See the MariaDB Books page for details and links: - https://mariadb.com/kb/en/mariadb/books/ - - User Feedback plugin - - - - - - - - - - - - - - - - - - - - - - - MariaDB includes a User Feedback plugin. This plugin is disabled by default. If enabled, it submits basic, completely anonymous MariaDB usage information. This information is used by the developers to track trends in MariaDB usage to better guide development efforts. If you would like to help make MariaDB better, please add feedback=ON to your my.cnf or my.ini file! See http://mariadb.com/kb/en/user-feedback-plugin for more information. - - Quality - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The project always strives for quality, but in reality, nothing is perfect. Please take time to report any issues you encounter at: - http://mariadb.org/jira - - Support MariaDB - - - - - - - - - - - - - - - - - - - - - - - - - - If you would like to contribute to the MariaDB Foundation, please see the contributing and donations pages. We also have merchandise available in a cafepress store. All proceeds go to support the MariaDB Foundation. - https://mariadb.com/kb/en/contributing - https://mariadb.org/en/donate/ - http://www.cafepress.com/mariadb We hope you enjoy MariaDB! -- MariaDB Website - http://mariadb.org Twitter - http://twitter.com/mariadb Google+ - http://google.com/+mariadb Facebook - http://fb.com/MariaDB.dbms Knowledge Base - http://mariadb.com/kb ___ 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
Re: [Maria-discuss] R: GSOC 2015 :UDFs returning arrays
Hi, Justin! On Mar 10, Justin Swanhart wrote: wl#820 also has table functions in it: http://antbits.blogspot.com/2009/01/table-functions-in-mysql.html mysql INSTALL PLUGIN Deep_Thought SONAME 'psm_example.so'; mysql CREATE FUNCTION test.FooAnswer() - RETURNS TABLE(answer TEXT) - NO SQL LANGUAGE Deep_Thought EXTERNAL NAME 'compute'; mysql CREATE VIEW foobar AS SELECT * FROM TABLE(test.FooAnswer) AS wibble; mysql SELECT * FROM foobar WHERE answer LIKE 'F%'; +---+ | answer| +---+ | Forty-Two | +---+ Ah, indeed. Thanks. It's still an unrelated feature - I mean, there is no reason why a table function must necessarily be impemented as an external procedure. And the implementation - I believe - creates a temporary table and puts all the data into it. I would rather prefer a generator-like interface, that produces rows one by one. It works much better for big data sets. Or, may be, we can do both. Either way - this implementation can be very helpful. But it'll need at least to be updated to work in 10.1. And may be we add the generator interface. Regards, Sergei ___ 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
