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From: Vladislav Shpilevoy via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: imeevma@tarantool.org
Cc: tarantool-patches@dev.tarantool.org
Subject: Re: [Tarantool-patches] [PATCH v2 12/15] sql: rework GROUP_CONCAT()
Date: Thu, 23 Sep 2021 00:49:52 +0200
Message-ID: <527aac58-f3f4-bae9-3057-187edee7d8d4@tarantool.org> (raw)
In-Reply-To: <265692b0b90cd9ce0a5362b55e81f7a2d598ad19.1632220375.git.imeevma@gmail.com>

Thanks for the patch!

> diff --git a/src/box/sql/func.c b/src/box/sql/func.c
> index f699aa927..001a8641c 100644
> --- a/src/box/sql/func.c
> +++ b/src/box/sql/func.c
> @@ -213,6 +213,52 @@ fin_minmax(struct sql_context *ctx)
>  	mem_copy(ctx->pOut, ctx->pMem);
>  }
>  
> +/** Implementation of the GROUP_CONCAT() function. */
> +static void
> +step_group_concat(struct sql_context *ctx, int argc, struct Mem **argv)
> +{
> +	assert(argc == 1 || argc == 2);
> +	(void)argc;
> +	if (argv[0]->type == MEM_TYPE_NULL)
> +		return;
> +	assert(mem_is_str(argv[0]) || mem_is_bin(argv[0]));
> +	if (ctx->pMem->type == MEM_TYPE_NULL) {
> +		if (mem_copy_str(ctx->pMem, argv[0]->z, argv[0]->n) != 0)

1. What if the argument is zeroblob with no actual memory allocated yet?

> +			ctx->is_aborted = true;
> +		return;
> +	}
> +	const char *sep = NULL;
> +	int sep_len = 0;
> +	if (argc == 1) {
> +		sep = ",";
> +		sep_len = 1;
> +	} else if (argv[1]->type == MEM_TYPE_NULL) {
> +		sep = "";
> +		sep_len = 0;
> +	} else {
> +		assert(mem_is_same_type(argv[0], argv[0]));
> +		sep = argv[1]->z;
> +		sep_len = argv[1]->n;
> +	}
> +	if (sep_len > 0) {
> +		if (mem_append(ctx->pMem, sep, sep_len) != 0) {

2. Will it work if sep_len == 0? If yes, then I would propose to
drop the len check here and call the append always.

> +			ctx->is_aborted = true;
> +			return;
> +		}

  reply	other threads:[~2021-09-22 22:49 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <cover.1632220375.git.imeevma@gmail.com>
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 01/15] sql: fix possible undefined behavior during cast Mergen Imeev via Tarantool-patches
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 02/15] sql: use register P1 for number of arguments Mergen Imeev via Tarantool-patches
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 04/15] sql: move collation to struct sql_context Mergen Imeev via Tarantool-patches
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 05/15] sql: introduce mem_append() Mergen Imeev via Tarantool-patches
2021-09-25 11:06   ` Mergen Imeev via Tarantool-patches
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 06/15] sql: remove sql_vdbemem_finalize() Mergen Imeev via Tarantool-patches
2021-09-22 22:47   ` Vladislav Shpilevoy via Tarantool-patches
2021-09-25 11:13     ` Mergen Imeev via Tarantool-patches
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 07/15] sql: rework SUM() Mergen Imeev via Tarantool-patches
2021-09-22 22:48   ` Vladislav Shpilevoy via Tarantool-patches
2021-09-25 11:17     ` Mergen Imeev via Tarantool-patches
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 08/15] sql: rework TOTAL() Mergen Imeev via Tarantool-patches
2021-09-25 11:20   ` Mergen Imeev via Tarantool-patches
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 09/15] sql: rework AVG() Mergen Imeev via Tarantool-patches
2021-09-22 22:48   ` Vladislav Shpilevoy via Tarantool-patches
2021-09-25 11:32     ` Mergen Imeev via Tarantool-patches
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 10/15] sql: rework COUNT() Mergen Imeev via Tarantool-patches
2021-09-25 11:34   ` Mergen Imeev via Tarantool-patches
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 11/15] sql: rework MIN() and MAX() Mergen Imeev via Tarantool-patches
2021-09-25 11:36   ` Mergen Imeev via Tarantool-patches
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 12/15] sql: rework GROUP_CONCAT() Mergen Imeev via Tarantool-patches
2021-09-22 22:49   ` Vladislav Shpilevoy via Tarantool-patches [this message]
2021-09-25 11:42     ` Mergen Imeev via Tarantool-patches
2021-09-29  7:03       ` Mergen Imeev via Tarantool-patches
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 13/15] sql: remove copying of result in finalizers Mergen Imeev via Tarantool-patches
2021-09-22 22:50   ` Vladislav Shpilevoy via Tarantool-patches
2021-09-25 11:47     ` Mergen Imeev via Tarantool-patches
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 14/15] sql: remove MEM_TYPE_AGG Mergen Imeev via Tarantool-patches
2021-09-21 10:59 ` [Tarantool-patches] [PATCH v2 15/15] sql: remove field argv from struct sql_context Mergen Imeev via Tarantool-patches
2021-09-22 22:51   ` Vladislav Shpilevoy via Tarantool-patches
2021-09-25 12:03     ` Mergen Imeev via Tarantool-patches

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