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From: Konstantin Osipov <kostja.osipov@gmail.com>
To: Nikita Pettik <korablev@tarantool.org>
Cc: tarantool-patches@freelists.org, tarantool-patches@dev.tarantool.org
Subject: Re: [Tarantool-patches] [tarantool-patches] [PATCH v1 0/9] schema: rework _trigger space
Date: Wed, 16 Oct 2019 14:11:42 +0300	[thread overview]
Message-ID: <20191016111142.GA16144@atlas> (raw)
In-Reply-To: <20191016110739.GB11847@tarantool.org>

* Nikita Pettik <korablev@tarantool.org> [19/10/16 14:08]:
> > The reason to store all persistent objects of the same type in the
> > same space is that Tarantool is designed as a multiple frontend
> > system. I.e. tomorrow there may be another front end, not just Lua
> > or SQL, and one doesn't want to have a separate table for each
> > front end.
> 
> Let's be objective: how close we are to introduce new language in
> Tarantool? Is there any demand for new language at all?

it is one of the tenets of the design. Should it be broken now
just because it feels like it won't happen? I think it's a way
broader question than the scope of this patch.

> > If the trigger timing, action type, definer, setuid and other
> > semantics is the same, and only the language is different, then 
> > why duplicate the space?
> 
> The thing is they are not the same. In fact, set of Lua and SQL trigger's
> features are quite different. In Lua trigger timing can be one of
> on_replace or before_replace, meanwhile in SQL trigger timing is one of
> BEFORE/AFTER/INSTEAD replace; In Lua action event is replace, whereas in SQL
> it can be INSERT/DELETE/UPDATE; FOR EACH ROW/STATEMENT action in SQL, and
> only FOR EACH ROW is available in Lua.

Right, so it's different values (today) of properties, but the properties
are largely the same. 
May I want to define a statement-level trigger in Lua in future?
Why not?  

What are the benefits of having a separate table?


-- 
Konstantin Osipov, Moscow, Russia

  reply	other threads:[~2019-10-16 11:11 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-14 16:03 [Tarantool-patches] " Kirill Shcherbatov
2019-10-14 16:03 ` [Tarantool-patches] [PATCH v1 1/9] sql: remove redundant pointer in TriggerStep Kirill Shcherbatov
2019-10-15 15:35   ` [Tarantool-patches] [tarantool-patches] " Nikita Pettik
2019-10-14 16:03 ` [Tarantool-patches] [PATCH v1 2/9] box: rename struct trigger to lua_trigger Kirill Shcherbatov
2019-10-17  7:33   ` Konstantin Osipov
2019-10-14 16:03 ` [Tarantool-patches] [PATCH v1 3/9] box: introduce trigger_event_manipulation enum Kirill Shcherbatov
2019-10-17  7:35   ` Konstantin Osipov
2019-10-14 16:03 ` [Tarantool-patches] [PATCH v1 4/9] box: introduce trigger_action_timing enum Kirill Shcherbatov
2019-10-14 16:03 ` [Tarantool-patches] [PATCH v1 5/9] sql: use rlist to organize triggers in a list Kirill Shcherbatov
2019-10-17  7:36   ` Konstantin Osipov
2019-10-14 16:03 ` [Tarantool-patches] [PATCH v1 6/9] sql: rework CREATE TABLE rule in parser Kirill Shcherbatov
2019-10-14 16:03 ` [Tarantool-patches] [PATCH v1 7/9] sql: wrap all ASTs in sql_trigger_expr structure Kirill Shcherbatov
2019-10-14 16:03 ` [Tarantool-patches] [PATCH v1 8/9] sql: inherit sql_trigger from a new trigger class Kirill Shcherbatov
2019-10-17  7:38   ` Konstantin Osipov
2019-10-14 16:03 ` [Tarantool-patches] [PATCH v1 9/9] schema: rework _trigger system space Kirill Shcherbatov
2019-10-17  7:44   ` Konstantin Osipov
2019-10-15 21:34 ` [Tarantool-patches] [tarantool-patches] [PATCH v1 0/9] schema: rework _trigger space Nikita Pettik
2019-10-16  5:57   ` Konstantin Osipov
2019-10-16  5:58     ` Konstantin Osipov
2019-10-16 11:07     ` Nikita Pettik
2019-10-16 11:11       ` Konstantin Osipov [this message]
2019-10-16 12:18         ` Nikita Pettik
2019-10-16 12:32           ` Konstantin Osipov
2019-10-16 12:47             ` Nikita Pettik
2019-10-16 12:53               ` Konstantin Osipov
2019-10-16 13:13                 ` Nikita Pettik
2019-10-16 14:18                   ` Konstantin Osipov
2019-10-16 12:53           ` [Tarantool-patches] [tarantool-patches] " Kirill Shcherbatov
2019-10-16 13:31             ` Nikita Pettik
2019-10-16 13:47               ` Kirill Shcherbatov
2019-10-16 20:27                 ` Vladislav Shpilevoy

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