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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 v4 01/16] sql: remove MEM_Zero flag from struct MEM
Date: Mon, 4 Oct 2021 23:51:42 +0200
Message-ID: <58315c1f-8fca-453f-0378-c451f4154cc9@tarantool.org> (raw)
In-Reply-To: <d4c17c235f28ea9b6e38acaf7c3c249180bf33aa.1633092363.git.imeevma@gmail.com>

Hi! Thanks for the patch!

See 2 comments below.

> diff --git a/src/box/sql/func.c b/src/box/sql/func.c
> index 29d713fd0..ff0c461ce 100644
> --- a/src/box/sql/func.c
> +++ b/src/box/sql/func.c
> @@ -1272,11 +1272,19 @@ zeroblobFunc(sql_context * context, int argc, sql_value ** argv)
>  	n = mem_get_int_unsafe(argv[0]);
>  	if (n < 0)
>  		n = 0;
> -	if (sql_result_zeroblob64(context, n) != 0) {
> +	if (n > sql_get()->aLimit[SQL_LIMIT_LENGTH]) {
>  		diag_set(ClientError, ER_SQL_EXECUTE, "string or binary string"\
>  			 "is too big");
>  		context->is_aborted = true;
> +		return;
> +	}
> +	char *str = sqlDbMallocRawNN(sql_get(), n);
> +	memset(str, 0, n);

1. There is sqlDbMallocZero().

> +	if (str == NULL) {
> +		context->is_aborted = true;
> +		return;
>  	}
> +	mem_set_bin_allocated(context->pOut, str, n);
>  }
>  
>  /*
> diff --git a/src/box/sql/mem.c b/src/box/sql/mem.c
> index 5e23c901c..24d6d7dbf 100644
> --- a/src/box/sql/mem.c
> +++ b/src/box/sql/mem.c
> @@ -1869,8 +1850,6 @@ mem_get_bin(const struct Mem *mem, const char **s)
>  		*s = mem->n > 0 ? mem->z : NULL;
>  		return 0;
>  	}
> -	if (mem->type != MEM_TYPE_BIN || (mem->flags & MEM_Zero) != 0)
> -		return -1;

2. If the type is not MEM_TYPE_BIN, you will return garbage. Maybe
keep return -1 for other types?

>  	*s = mem->z;
>  	return 0;
>  }

  reply	other threads:[~2021-10-04 21:51 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-01 12:48 [Tarantool-patches] [PATCH v4 00/16] sql: refactor aggregate functions Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 01/16] sql: remove MEM_Zero flag from struct MEM Mergen Imeev via Tarantool-patches
2021-10-04 21:51   ` Vladislav Shpilevoy via Tarantool-patches [this message]
2021-10-05  8:46     ` Mergen Imeev via Tarantool-patches
2021-10-05  9:42       ` Mergen Imeev via Tarantool-patches
2021-10-05 12:28         ` Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 02/16] sql: fix possible undefined behavior during cast Mergen Imeev via Tarantool-patches
2021-10-04 21:52   ` Vladislav Shpilevoy via Tarantool-patches
2021-10-05  9:00     ` Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 03/16] sql: use register P1 for number of arguments Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 04/16] sql: remove AggStep0 and OP_BuiltinFunction0 Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 05/16] sql: move collation to struct sql_context Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 06/16] sql: introduce mem_append() Mergen Imeev via Tarantool-patches
2021-10-04 21:52   ` Vladislav Shpilevoy via Tarantool-patches
2021-10-05  9:32     ` Mergen Imeev via Tarantool-patches
2021-10-11 21:50       ` Vladislav Shpilevoy via Tarantool-patches
2021-10-19 10:49         ` Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 07/16] sql: remove sql_vdbemem_finalize() Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 08/16] sql: refactor SUM() function Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 09/16] sql: refactor TOTAL() function Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 10/16] sql: refactor AVG() function Mergen Imeev via Tarantool-patches
2021-10-04 21:53   ` Vladislav Shpilevoy via Tarantool-patches
2021-10-05  9:48     ` Mergen Imeev via Tarantool-patches
2021-10-11 21:50       ` Vladislav Shpilevoy via Tarantool-patches
2021-10-19 11:14         ` Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 11/16] sql: refactor COUNT() function Mergen Imeev via Tarantool-patches
2021-10-04 21:53   ` Vladislav Shpilevoy via Tarantool-patches
2021-10-05  9:55     ` Mergen Imeev via Tarantool-patches
2021-10-11 21:51       ` Vladislav Shpilevoy via Tarantool-patches
2021-10-19 11:17         ` Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 12/16] sql: refactor MIN() and MAX() functions Mergen Imeev via Tarantool-patches
2021-10-04 21:54   ` Vladislav Shpilevoy via Tarantool-patches
2021-10-05 10:07     ` Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 13/16] sql: refactor GROUP_CONCAT() function Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 14/16] sql: remove copying of result in finalizers Mergen Imeev via Tarantool-patches
2021-10-01 12:48 ` [Tarantool-patches] [PATCH v4 15/16] sql: remove MEM_TYPE_AGG Mergen Imeev via Tarantool-patches
2021-10-01 12:49 ` [Tarantool-patches] [PATCH v4 16/16] sql: remove field argv from struct sql_context Mergen Imeev via Tarantool-patches
2021-10-25 20:58 ` [Tarantool-patches] [PATCH v4 00/16] sql: refactor aggregate functions Vladislav Shpilevoy via Tarantool-patches
2021-10-26 10:34 Mergen Imeev via Tarantool-patches
2021-10-26 10:34 ` [Tarantool-patches] [PATCH v4 01/16] sql: remove MEM_Zero flag from struct MEM Mergen Imeev via Tarantool-patches

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