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From: Imeev Mergen <imeevma@tarantool.org>
To: tarantool-discussions@dev.tarantool.org, kostja.osipov@gmail.com,
	pgulutzan@ocelot.ca, korablev@tarantool.org,
	alexander.turenko@tarantool.org, v.shpilevoy@tarantool.org,
	kyukhin@tarantool.org, tsafin@tarantool.org
Subject: Re: [Tarantool-discussions] Implicit cast for ASSIGNMENT
Date: Thu, 30 Apr 2020 15:04:11 +0300
Message-ID: <36e21524-35d7-9f54-5953-32863df95709@tarantool.org> (raw)
In-Reply-To: <20200213142534.GA26443@tarantool.org>

Hi! Here we go again. Last time we have not come to a colclusion.

So, I suggest these rules for implicit cast for ASSIGNMENT:
1) Any value can be implicitly cast to ANY type.
2) Any scalar values ​​can be implicitly cast to SCALAR type.
3) Values ​​of numeric types can be implicitly cast to other numeric
types.
4) Implicit casting is prohibited, except as described above.


I think that the rules for implicit casting when assigning value
of numeric type must be the same as in C.

On 2/13/20 5:25 PM, Mergen Imeev wrote:
> Hi all,
> I would like to discuss the second issue of casts in SQL. I mean
> implicit casting for ASSIGNMENT.
>
> For now, I suggest avoiding questions about SCALAR, as the
> discussion is already in progress.
>
> So, I suggest removing the current implicit casts. We can
> reimplement implicit casts in accordance with ANSI in issue #3836.
> But since priority of #3836 is low, this is most likely not going
> to happen for some time.
>
> At the moment, I see two ways to remove implicit casts:
> 1) Disable all implicit casts, except casts for numeric values.
> These casts will become UDCF later.
> 2) Disable all implicit casts. Assignment in Tarantool-SQL will
> work the same as in noSQL Tarantool.
>
> What do you think about this?
>

  parent reply	other threads:[~2020-04-30 12:04 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-13 14:25 Mergen Imeev
2020-02-13 14:40 ` Konstantin Osipov
2020-02-13 22:20 ` Peter Gulutzan
2020-04-30 12:04 ` Imeev Mergen [this message]
2020-04-30 12:35   ` Konstantin Osipov
2020-04-30 12:56     ` Imeev Mergen
2020-04-30 13:09       ` Konstantin Osipov
2020-04-30 13:12         ` Imeev Mergen
2020-04-30 14:04           ` Konstantin Osipov
2020-04-30 14:15             ` Peter Gulutzan
2020-04-30 14:28               ` Konstantin Osipov
2020-04-30 14:40   ` Peter Gulutzan
2020-04-30 15:10     ` Imeev Mergen
2020-04-30 16:04       ` Peter Gulutzan
2020-05-07 16:14         ` Peter Gulutzan
2020-05-08 11:57           ` Kirill Yukhin
2020-04-30 22:52       ` [Tarantool-discussions] Descriptive SQL Style Guide Peter Gulutzan

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