From: Vladislav Shpilevoy via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: Mergen Imeev <imeevma@tarantool.org>
Cc: tarantool-patches@dev.tarantool.org
Subject: Re: [Tarantool-patches] [PATCH v1 04/21] sql: refactor LENGTH() function
Date: Sat, 30 Oct 2021 01:42:49 +0200 [thread overview]
Message-ID: <256a19c0-6b2b-33ad-1086-0e318cc362ec@tarantool.org> (raw)
In-Reply-To: <20211025083009.GD36295@tarantool.org>
>>> diff --git a/src/box/sql/func.c b/src/box/sql/func.c
>>> index e5d763be1..863dbf1c4 100644
>>> --- a/src/box/sql/func.c
>>> +++ b/src/box/sql/func.c
>>> @@ -833,6 +833,19 @@ func_hex(struct sql_context *ctx, int argc, struct Mem *argv)
>>> mem_set_str_allocated(ctx->pOut, str, size);
>>> }
>>>
>>> +/** Implementation of the OCTET_LENGTH() function. */
>>> +static void
>>> +func_octet_length(struct sql_context *ctx, int argc, struct Mem *argv)
>>
>> Why is the function LENGTH defined as 'octet_length' instead of just 'length'?
> ANSI defines two functions: CHAR_LENGTH() (with CHARACTER_LENGTH() as the other
> name) and OCTET_LENGTH(). The first accepts only STRING values and returns the
> length in characters or length in octets (depending on the USING clause). The
> second accepts VARBINARY or STRING and returns the length in octets.
>
> We have a LENGTH() function that returns the character length if the argument is
> STRING, and the octet length if the argument is VARBINARY.
>
> Since I am planning to introduce the USING clause, I find it better to use the
> CHAR_LENGTH() and OCTET_LENGTH() implementations for LENGTH() depending on the
> type of the argument. The func_octet_length() function will be used cases such
> as this:
> SELECT char_length(string_value USING OCTETS);
>
> At the moment, I have no plans to introduce OCTET_LENGTH().
Does ANSI define 'USING' or 'OCTET_LENGTH'? Or both?
next prev parent reply other threads:[~2021-10-29 23:43 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-08 17:31 [Tarantool-patches] [PATCH v1 00/21] Refactor non-standard and non-aggragate functions Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 01/21] sql: refactor CHAR() function Mergen Imeev via Tarantool-patches
2021-10-14 22:42 ` Vladislav Shpilevoy via Tarantool-patches
2021-10-25 8:02 ` Mergen Imeev via Tarantool-patches
2021-10-29 23:42 ` Vladislav Shpilevoy via Tarantool-patches
2021-11-02 11:35 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 02/21] sql: refactor GREATEST() and LEAST() functions Mergen Imeev via Tarantool-patches
2021-10-14 22:42 ` Vladislav Shpilevoy via Tarantool-patches
2021-10-25 8:17 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 03/21] sql: refactor HEX() function Mergen Imeev via Tarantool-patches
2021-10-14 22:43 ` Vladislav Shpilevoy via Tarantool-patches
2021-10-25 8:19 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 04/21] sql: refactor LENGTH() function Mergen Imeev via Tarantool-patches
2021-10-14 22:43 ` Vladislav Shpilevoy via Tarantool-patches
2021-10-25 8:30 ` Mergen Imeev via Tarantool-patches
2021-10-29 23:42 ` Vladislav Shpilevoy via Tarantool-patches [this message]
2021-11-02 11:39 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 05/21] sql: refactor PRINTF() function Mergen Imeev via Tarantool-patches
2021-10-14 22:44 ` Vladislav Shpilevoy via Tarantool-patches
2021-10-25 8:33 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 06/21] sql: refactor RANDOM() function Mergen Imeev via Tarantool-patches
2021-10-25 8:35 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 07/21] sql: rework RANDOMBLOB() function Mergen Imeev via Tarantool-patches
2021-10-25 8:36 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 08/21] sql: refactor ZEROBLOB() function Mergen Imeev via Tarantool-patches
2021-10-25 8:37 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 09/21] sql: refactor TYPEOF() function Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 10/21] sql: refactor ROUND() function Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 11/21] sql: refactor ROW_COUNT() function Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 12/21] sql: rework UUID() function Mergen Imeev via Tarantool-patches
2021-10-25 8:38 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 13/21] sql: refactor VERSION() function Mergen Imeev via Tarantool-patches
2021-10-08 17:31 ` [Tarantool-patches] [PATCH v1 14/21] sql: refactor UNICODE() function Mergen Imeev via Tarantool-patches
2021-10-14 22:44 ` Vladislav Shpilevoy via Tarantool-patches
2021-10-25 8:40 ` Mergen Imeev via Tarantool-patches
2021-11-02 11:42 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:32 ` [Tarantool-patches] [PATCH v1 15/21] sql: refactor of SOUNDEX() function Mergen Imeev via Tarantool-patches
2021-10-08 17:32 ` [Tarantool-patches] [PATCH v1 16/21] sql: refactor REPLACE() function Mergen Imeev via Tarantool-patches
2021-10-14 22:45 ` Vladislav Shpilevoy via Tarantool-patches
2021-10-25 8:45 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:32 ` [Tarantool-patches] [PATCH v1 17/21] sql: refactor QUOTE() function Mergen Imeev via Tarantool-patches
2021-10-08 17:32 ` [Tarantool-patches] [PATCH v1 18/21] sql: remove unused code Mergen Imeev via Tarantool-patches
2021-10-25 8:51 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:32 ` [Tarantool-patches] [PATCH v1 19/21] sql: remove MEM_Dyn flag Mergen Imeev via Tarantool-patches
2021-10-14 22:46 ` Vladislav Shpilevoy via Tarantool-patches
2021-10-25 8:54 ` Mergen Imeev via Tarantool-patches
2021-10-29 23:43 ` Vladislav Shpilevoy via Tarantool-patches
2021-11-02 11:43 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:32 ` [Tarantool-patches] [PATCH v1 20/21] sql: remove MEM_Term flag Mergen Imeev via Tarantool-patches
2021-10-14 22:47 ` Vladislav Shpilevoy via Tarantool-patches
2021-10-25 9:57 ` Mergen Imeev via Tarantool-patches
2021-10-08 17:32 ` [Tarantool-patches] [PATCH v1 21/21] sql: make arguments to be const Mergen Imeev via Tarantool-patches
2021-11-02 22:15 ` [Tarantool-patches] [PATCH v1 00/21] Refactor non-standard and non-aggragate functions Vladislav Shpilevoy via Tarantool-patches
2021-11-11 10:48 Mergen Imeev via Tarantool-patches
2021-11-11 10:48 ` [Tarantool-patches] [PATCH v1 04/21] sql: refactor LENGTH() function Mergen Imeev via Tarantool-patches
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