Merge polly.local:/tmp/20924/bug20294/my50-bug20294

into  polly.local:/home/kaa/src/maint/m50-maint--07OGt


sql/item_cmpfunc.cc:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/sql_class.h:
  Auto merged
mysql-test/r/user_var.result:
  Manual merge
mysql-test/t/user_var.test:
  Manual merge
sql/item_func.cc:
  Manual merge
sql/item_func.h:
  Manual merge

mysql-test/r/case.result

@@ -200,3 +200,10 @@ CEMPNUM	EMPMUM1	EMPNUM2
 0.00	0	0.00
 2.00	2	NULL
 DROP TABLE t1,t2;
+SELECT CASE 1 WHEN 1 THEN 18446744073709551615 ELSE 1 END;
+CASE 1 WHEN 1 THEN 18446744073709551615 ELSE 1 END
+18446744073709551615
+SELECT COALESCE(18446744073709551615);
+COALESCE(18446744073709551615)
+18446744073709551615
+End of 4.1 tests

mysql-test/r/func_if.result

@@ -128,3 +128,10 @@ f1	f2	if(f1, 40.0, 5.00)
 0	0	5.00
 1	1	40.00
 drop table t1;
+SELECT IF(1 != 0, 18446744073709551615, 1);
+IF(1 != 0, 18446744073709551615, 1)
+18446744073709551615
+SELECT IFNULL(NULL, 18446744073709551615);
+IFNULL(NULL, 18446744073709551615)
+18446744073709551615
+End of 4.1 tests

mysql-test/r/func_test.result

@@ -204,3 +204,10 @@ NULL
 SELECT GREATEST(1.5E+2,1.3E+2,NULL) FROM DUAL;
 GREATEST(1.5E+2,1.3E+2,NULL)
 NULL
+SELECT GREATEST(1, 18446744073709551615);
+GREATEST(1, 18446744073709551615)
+18446744073709551615
+SELECT LEAST(1, 18446744073709551615);
+LEAST(1, 18446744073709551615)
+1
+End of 4.1 tests

mysql-test/r/user_var.result

@@ -301,3 +301,4 @@ select @var;
 @var
 3
 drop table t1;
+End of 4.1 tests

mysql-test/t/case.test

@@ -133,8 +133,6 @@ select min(a), min(case when 1=1 then a else NULL end),
 from t1 where b=3 group by b;
 drop table t1;
 
-# End of 4.1 tests
-
 
 #
 # Tests for bug #9939: conversion of the arguments for COALESCE and IFNULL
@@ -154,3 +152,12 @@ SELECT IFNULL(t2.EMPNUM,t1.EMPNUM) AS CEMPNUM,
   FROM t1 LEFT JOIN t2 ON t1.EMPNUM=t2.EMPNUM;
 
 DROP TABLE t1,t2;
+#
+# Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various
+# functions
+# - UNSIGNED values in CASE and COALESCE are treated as SIGNED
+#
+SELECT CASE 1 WHEN 1 THEN 18446744073709551615 ELSE 1 END;
+SELECT COALESCE(18446744073709551615);
+
+--echo End of 4.1 tests

mysql-test/t/func_if.test

@@ -97,3 +97,18 @@ create table t1 (f1 int, f2 int);
 insert into t1 values(1,1),(0,0);
 select f1, f2, if(f1, 40.0, 5.00) from t1 group by f1 order by f2;
 drop table t1;
+#
+# Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various
+# functions
+# - UNSIGNED values in IF() are treated as SIGNED
+#
+SELECT IF(1 != 0, 18446744073709551615, 1);
+
+#
+# Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various
+# functions
+# - UNSIGNED values in IFNULL() are treated as SIGNED
+#
+SELECT IFNULL(NULL, 18446744073709551615);
+
+--echo End of 4.1 tests

mysql-test/t/func_test.test

@@ -108,8 +108,6 @@ select 5.1 mod 3, 5.1 mod -3, -5.1 mod 3, -5.1 mod -3;
 
 select 5 mod 3, 5 mod -3, -5 mod 3, -5 mod -3;
 
-# End of 4.1 tests
-
 #
 # Bug#6726: NOT BETWEEN parse failure
 #
@@ -127,3 +125,13 @@ SELECT GREATEST(1,NULL) FROM DUAL;
 SELECT LEAST('xxx','aaa',NULL,'yyy') FROM DUAL;
 SELECT LEAST(1.1,1.2,NULL,1.0) FROM DUAL;
 SELECT GREATEST(1.5E+2,1.3E+2,NULL) FROM DUAL;
+
+#
+# Bug #20924: CAST(expr as UNSIGNED) returns SIGNED value when used in various
+# functions
+# - UNSIGNED values in GREATEST() and LEAST() are treated as SIGNED
+#
+SELECT GREATEST(1, 18446744073709551615);
+SELECT LEAST(1, 18446744073709551615);
+
+--echo End of 4.1 tests

mysql-test/t/user_var.test

@@ -144,8 +144,6 @@ select @@version;
 --replace_column 1 #
 select @@global.version;
 
-# End of 4.1 tests
-
 #
 # Bug #6598: problem with cast(NULL as signed integer);
 #
@@ -212,3 +210,5 @@ insert into t1 values (1,2),(2,3),(3,1);
 select @var:=f2 from t1 group by f1 order by f2 desc limit 1;
 select @var;
 drop table t1;
+
+--echo End of 4.1 tests