[Tarantool-discussions] Implicit cast for ASSIGNMENT
imeevma at tarantool.org
Thu Apr 30 15:04:11 MSK 2020
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
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?
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