bk commit into 4.1 tree (timour:1.2365) BUG#11185

[timour]

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ChangeSet
  1.2365 05/07/16 10:30:25 timour@stripped +2 -0
  Added test for Bug #11521
  "Negative integer keys incorrectly substituted for 0 during range analysis."
  
  The problem is that the range optimizer incorrectly replaces any negative
  constant with '0' for all types except BIGINT because the method save_in_field()
  casts negative integers to non-negative. This causes incorrect query
  results where (0 = any_negative_number).
  
  The problem caused by this bug is fixed by the patch for BUG#11185.
  That patch constitutes an optimization due to which the problem code is
  never called with negative constants. This patch adds a test so we are sure
  that the problem does not reappear.

  mysql-test/t/select.test
    1.43 05/07/16 10:29:57 timour@stripped +11 -0
    Test for BUG#11521.

  mysql-test/r/select.result
    1.60 05/07/16 10:29:57 timour@stripped +12 -0
    Test for BUG#11521.

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	timour
# Host:	zmei.home
# Root:	/home/timka/mysql/src/4.1-dbg

--- 1.59/mysql-test/r/select.result	2005-07-16 02:25:22 +03:00
+++ 1.60/mysql-test/r/select.result	2005-07-16 10:29:57 +03:00
@@ -2570,3 +2570,15 @@
 1
 NULL
 drop table t1,t2;
+create table t2 (a tinyint unsigned);
+create index t2i on t2(a);
+insert into t2 values (0), (254), (255);
+explain select * from t2 where a > -1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t2	index	t2i	t2i	2	NULL	3	Using where; Using index
+select * from t2 where a > -1;
+a
+0
+254
+255
+drop table t2;

--- 1.42/mysql-test/t/select.test	2005-07-16 02:24:32 +03:00
+++ 1.43/mysql-test/t/select.test	2005-07-16 10:29:57 +03:00
@@ -2127,3 +2127,14 @@
 select A.f2 from t1 left join t2 A on A.f2 = f1 where A.f3=(select min(f3)
 from  t2 C where A.f4 = C.f4) or A.f3 IS NULL; 
 drop table t1,t2;
+
+#
+# Bug #11521 Negative integer keys incorrectly substituted for 0 during
+#            range analysis.
+
+create table t2 (a tinyint unsigned);
+create index t2i on t2(a);
+insert into t2 values (0), (254), (255);
+explain select * from t2 where a > -1;
+select * from t2 where a > -1;
+drop table t2;