From: Vladislav Shpilevoy <v.shpilevoy@tarantool.org> To: "n.pettik" <korablev@tarantool.org>, tarantool-patches@freelists.org Subject: [tarantool-patches] Re: [PATCH 6/6] sql: allow to specify UNSIGNED column type Date: Thu, 11 Jul 2019 23:25:04 +0200 [thread overview] Message-ID: <a5a77dcf-9661-a5b8-ea0f-082ed30b5a19@tarantool.org> (raw) In-Reply-To: <9a397d31-1cae-0dd0-cdd6-733388cb01af@tarantool.org> As I promised, below are other comments regarding Mem.u.i/u, MEM_Int/UInt. Perhaps, they are final. ------------------------- vdbemem.c:661 > if ((pMem->flags & MEM_Blob) != 0 && type == FIELD_TYPE_NUMBER) { > bool is_neg; > if (sql_atoi64(pMem->z, (int64_t *) &pMem->u.i, &is_neg, > pMem->n) == 0) { > MemSetTypeFlag(pMem, MEM_Real); > pMem->u.r = pMem->u.i; > return 0; > } > return ! sqlAtoF(pMem->z, &pMem->u.r, pMem->n); > } Here you use assign 'pMem.u.i' to 'pMem.u.r' without checking its sign. In theory something like that should work wrong now: box.execute("SELECT CAST('9223372036854775837' AS REAL)") But you need to somehow write that number as blob. ------------------------- vdbetrace.c:90 Function sqlVdbeExpandSql stringifies integers, but misses a version for big unsigned. ------------------------- vdbe.c:307 > case FIELD_TYPE_INTEGER: > case FIELD_TYPE_UNSIGNED: > if ((record->flags & MEM_Int) == MEM_Int) > return 0; > if ((record->flags & MEM_UInt) == MEM_UInt) > return 0; > if ((record->flags & MEM_Real) == MEM_Real) { > int64_t i = (int64_t) record->u.r; > if (i == record->u.r) > mem_set_int(record, record->u.r, > record->u.r <= -1); > return 0; > } It is a part of function mem_apply_type. When target type is UNSIGNED, and a value is MEM_Int, you do nothing. Why? Looks like it is possible to pass here a negative value, and CAST UNSIGNED would do nothing.
next prev parent reply other threads:[~2019-07-11 21:23 UTC|newest] Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-06-07 15:37 [tarantool-patches] [PATCH 0/6] Introduce UNSIGNED type in SQL Nikita Pettik 2019-06-07 15:37 ` [tarantool-patches] [PATCH 1/6] sql: refactor sql_atoi64() Nikita Pettik 2019-06-11 21:11 ` [tarantool-patches] " Vladislav Shpilevoy 2019-07-01 14:20 ` n.pettik 2019-07-01 21:53 ` Vladislav Shpilevoy 2019-07-05 16:32 ` n.pettik 2019-06-07 15:37 ` [tarantool-patches] [PATCH 2/6] sql: separate VDBE memory holding positive and negative ints Nikita Pettik 2019-06-11 21:11 ` [tarantool-patches] " Vladislav Shpilevoy 2019-07-01 14:21 ` n.pettik 2019-07-01 21:53 ` Vladislav Shpilevoy 2019-07-05 16:33 ` n.pettik 2019-06-07 15:37 ` [tarantool-patches] [PATCH 3/6] sql: refactor arithmetic operations to support unsigned ints Nikita Pettik 2019-06-11 21:11 ` [tarantool-patches] " Vladislav Shpilevoy 2019-07-01 14:21 ` n.pettik 2019-07-01 21:53 ` Vladislav Shpilevoy 2019-07-05 16:36 ` n.pettik 2019-07-10 22:49 ` Vladislav Shpilevoy 2019-07-17 12:24 ` n.pettik 2019-06-07 15:37 ` [tarantool-patches] [PATCH 4/6] sql: make built-in functions operate on unsigned values Nikita Pettik 2019-06-11 21:11 ` [tarantool-patches] " Vladislav Shpilevoy 2019-07-01 14:21 ` n.pettik 2019-07-01 21:53 ` Vladislav Shpilevoy 2019-07-05 16:36 ` n.pettik 2019-07-10 22:49 ` Vladislav Shpilevoy 2019-07-17 0:53 ` n.pettik 2019-06-07 15:37 ` [tarantool-patches] [PATCH 5/6] sql: introduce extended range for INTEGER type Nikita Pettik 2019-06-11 21:11 ` [tarantool-patches] " Vladislav Shpilevoy 2019-07-01 14:21 ` n.pettik 2019-07-01 21:53 ` Vladislav Shpilevoy 2019-07-24 15:59 ` Konstantin Osipov 2019-07-24 16:54 ` n.pettik 2019-07-24 17:09 ` Konstantin Osipov 2019-06-07 15:37 ` [tarantool-patches] [PATCH 6/6] sql: allow to specify UNSIGNED column type Nikita Pettik 2019-07-01 21:53 ` [tarantool-patches] " Vladislav Shpilevoy 2019-07-05 16:36 ` n.pettik 2019-07-10 22:49 ` Vladislav Shpilevoy 2019-07-11 21:25 ` Vladislav Shpilevoy [this message] 2019-07-17 0:53 ` n.pettik 2019-07-18 20:18 ` Vladislav Shpilevoy 2019-07-18 20:56 ` n.pettik 2019-07-18 21:08 ` Vladislav Shpilevoy 2019-07-18 21:13 ` Vladislav Shpilevoy 2019-07-22 10:20 ` n.pettik 2019-07-22 19:17 ` Vladislav Shpilevoy 2019-07-22 10:20 ` n.pettik 2019-07-17 0:54 ` n.pettik 2019-07-18 20:18 ` Vladislav Shpilevoy 2019-08-06 19:36 ` n.pettik 2019-07-24 13:01 ` [tarantool-patches] Re: [PATCH 0/6] Introduce UNSIGNED type in SQL Kirill Yukhin
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