Tarantool development patches archive
 help / color / mirror / Atom feed
From: Mergen Imeev via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: kyukhin@tarantool.org
Cc: tarantool-patches@dev.tarantool.org
Subject: [Tarantool-patches] [PATCH v1 2/3] sql: fix cast of small negative DECIMAL to INTEGER
Date: Tue, 19 Oct 2021 09:19:48 +0300	[thread overview]
Message-ID: <6110edd3614c443d9e8fe6406e663dbcbc872b48.1634624290.git.imeevma@gmail.com> (raw)
In-Reply-To: <cover.1634624290.git.imeevma@gmail.com>

This patch fixes an assertion when casting DECIMAL value less than 0 and
greater than -1 to INTEGER.

Part of #6485
---
 src/box/sql/mem.c                             |  9 +++----
 test/sql-tap/gh-6485-bugs-in-decimal.test.lua | 24 ++++++++++++++++++-
 2 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/src/box/sql/mem.c b/src/box/sql/mem.c
index b0eba303e..bc6f9b35a 100644
--- a/src/box/sql/mem.c
+++ b/src/box/sql/mem.c
@@ -1106,9 +1106,9 @@ dec_to_int(struct Mem *mem)
 		int64_t i;
 		if (decimal_to_int64(&mem->u.d, &i) == NULL)
 			return -1;
-		assert(i < 0);
+		assert(i <= 0);
 		mem->u.i = i;
-		mem->type = MEM_TYPE_INT;
+		mem->type = i == 0 ? MEM_TYPE_UINT : MEM_TYPE_INT;
 		mem->flags = 0;
 		return 0;
 	}
@@ -1137,14 +1137,15 @@ dec_to_int_forced(struct Mem *mem)
 	bool is_dec_int = decimal_is_int(&mem->u.d);
 	if (decimal_is_neg(&mem->u.d)) {
 		int64_t i;
-		mem->type = MEM_TYPE_INT;
 		mem->flags = 0;
 		if (decimal_to_int64(&mem->u.d, &i) == NULL) {
 			mem->u.i = INT64_MIN;
+			mem->type = MEM_TYPE_INT;
 			return -1;
 		}
-		assert(i < 0);
+		assert(i <= 0);
 		mem->u.i = i;
+		mem->type = i == 0 ? MEM_TYPE_UINT : MEM_TYPE_INT;
 		/*
 		 * Decimal is floored when cast to int, which means that after
 		 * cast it becomes bigger if it was not integer.
diff --git a/test/sql-tap/gh-6485-bugs-in-decimal.test.lua b/test/sql-tap/gh-6485-bugs-in-decimal.test.lua
index 3f63f2b76..0b9b2ea0a 100755
--- a/test/sql-tap/gh-6485-bugs-in-decimal.test.lua
+++ b/test/sql-tap/gh-6485-bugs-in-decimal.test.lua
@@ -1,6 +1,6 @@
 #!/usr/bin/env tarantool
 local test = require("sqltester")
-test:plan(1)
+test:plan(3)
 
 -- Make sure DECIMAL is not truncated when used in an index.
 test:do_execsql_test(
@@ -13,4 +13,26 @@ test:do_execsql_test(
     ]], {
     })
 
+--
+-- Make sure that DECIMAL greater than -1 and less than 0 are correctly cast to
+-- INTEGER.
+--
+test:do_execsql_test(
+    "gh-6485-2",
+    [[
+        SELECT CAST(CAST(-0.5 AS DECIMAL) AS INTEGER);
+    ]], {
+        0
+    })
+
+test:do_execsql_test(
+    "gh-6485-3",
+    [[
+        CREATE TABLE t(i INTEGER PRIMARY KEY);
+        INSERT INTO t VALUES(1);
+        SELECT i FROM t WHERE i IN (CAST(-0.1 AS DECIMAL), CAST(2 AS DECIMAL));
+        DROP TABLE t;
+    ]], {
+    })
+
 test:finish_test()
-- 
2.25.1


  parent reply	other threads:[~2021-10-19  6:20 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-19  6:19 [Tarantool-patches] [PATCH v1 0/3] Fix some bugs with DECIMAL Mergen Imeev via Tarantool-patches
2021-10-19  6:19 ` [Tarantool-patches] [PATCH v1 1/3] sql: fix truncation of DECIMAL in implicit cast Mergen Imeev via Tarantool-patches
2021-10-19  6:19 ` Mergen Imeev via Tarantool-patches [this message]
2021-10-19  6:19 ` [Tarantool-patches] [PATCH v1 3/3] sql: do not truncate DECIMAL in LIMIT and OFFSET Mergen Imeev via Tarantool-patches
  -- strict thread matches above, loose matches on Subject: below --
2021-10-04 13:30 [Tarantool-patches] [PATCH v1 0/3] Fix some bugs with DECIMAL Mergen Imeev via Tarantool-patches
2021-10-04 13:30 ` [Tarantool-patches] [PATCH v1 2/3] sql: fix cast of small negative DECIMAL to INTEGER Mergen Imeev via Tarantool-patches

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=6110edd3614c443d9e8fe6406e663dbcbc872b48.1634624290.git.imeevma@gmail.com \
    --to=tarantool-patches@dev.tarantool.org \
    --cc=imeevma@tarantool.org \
    --cc=kyukhin@tarantool.org \
    --subject='Re: [Tarantool-patches] [PATCH v1 2/3] sql: fix cast of small negative DECIMAL to INTEGER' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox