MDEV-4859 Wrong value and data type of "SELECT MAX(time_column) + 1 FROM t1"

Fixed.

mysql-test/r/func_time.result

@@ -958,10 +958,10 @@ sec_to_time(1) + 0, from_unixtime(1) + 0;
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
-  `now() - now()` decimal(20,0) NOT NULL DEFAULT '0',
-  `curtime() - curtime()` decimal(11,0) NOT NULL DEFAULT '0',
-  `sec_to_time(1) + 0` decimal(11,0) DEFAULT NULL,
-  `from_unixtime(1) + 0` decimal(20,0) DEFAULT NULL
+  `now() - now()` bigint(21) NOT NULL DEFAULT '0',
+  `curtime() - curtime()` bigint(12) NOT NULL DEFAULT '0',
+  `sec_to_time(1) + 0` bigint(12) DEFAULT NULL,
+  `from_unixtime(1) + 0` bigint(21) DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 drop table t1;
 SELECT SEC_TO_TIME(3300000);

mysql-test/r/type_time.result

@@ -191,5 +191,112 @@ SELECT CONCAT(GREATEST(TIME('32 00:00:01'),TIME('00:00:00')));
 CONCAT(GREATEST(TIME('32 00:00:01'),TIME('00:00:00')))
 768:00:01
 #
+# MDEV-4859 Wrong value and data type of "SELECT MAX(time_column) + 1 FROM t1"
+#
+CREATE TABLE t1 (t0 TIME);
+INSERT INTO t1 VALUES ('10:10:10');
+SELECT MAX(t0)+1 FROM t1;
+MAX(t0)+1
+101011
+CREATE TABLE t2 AS SELECT MAX(t0)+1 FROM t1;
+SELECT * FROM t2;
+MAX(t0)+1
+101011
+SHOW COLUMNS FROM t2;
+Field	Type	Null	Key	Default	Extra
+MAX(t0)+1	bigint(12)	YES		NULL	
+DROP TABLE t2,t1;
+CREATE TABLE t1 (t0 TIME);
+INSERT INTO t1 VALUES ('10:10:10');
+SELECT MAX(t0)+1.1 FROM t1;
+MAX(t0)+1.1
+101011.1
+CREATE TABLE t2 AS SELECT MAX(t0)+1.1 FROM t1;
+SELECT * FROM t2;
+MAX(t0)+1.1
+101011.1
+SHOW COLUMNS FROM t2;
+Field	Type	Null	Key	Default	Extra
+MAX(t0)+1.1	decimal(12,1)	YES		NULL	
+DROP TABLE t2,t1;
+CREATE TABLE t1 (t0 TIME);
+INSERT INTO t1 VALUES ('10:10:10');
+SELECT MAX(t0)+1e0 FROM t1;
+MAX(t0)+1e0
+101011
+CREATE TABLE t2 AS SELECT MAX(t0)+1e0 FROM t1;
+SELECT * FROM t2;
+MAX(t0)+1e0
+101011
+SHOW COLUMNS FROM t2;
+Field	Type	Null	Key	Default	Extra
+MAX(t0)+1e0	double	YES		NULL	
+DROP TABLE t2,t1;
+CREATE TABLE t1 (t1 TIME(1));
+INSERT INTO t1 VALUES ('10:10:10');
+SELECT MAX(t1)+1 FROM t1;
+MAX(t1)+1
+101011.0
+CREATE TABLE t2 AS SELECT MAX(t1)+1 FROM t1;
+SELECT * FROM t2;
+MAX(t1)+1
+101011.0
+SHOW COLUMNS FROM t2;
+Field	Type	Null	Key	Default	Extra
+MAX(t1)+1	decimal(13,1)	YES		NULL	
+DROP TABLE t2,t1;
+CREATE TABLE t1 (t0 DATETIME);
+INSERT INTO t1 VALUES ('2001-01-01 10:10:10');
+SELECT MAX(t0)+1 FROM t1;
+MAX(t0)+1
+20010101101011
+CREATE TABLE t2 AS SELECT MAX(t0)+1 FROM t1;
+SELECT * FROM t2;
+MAX(t0)+1
+20010101101011
+SHOW COLUMNS FROM t2;
+Field	Type	Null	Key	Default	Extra
+MAX(t0)+1	bigint(21)	YES		NULL	
+DROP TABLE t2,t1;
+CREATE TABLE t1 (t0 DATETIME);
+INSERT INTO t1 VALUES ('2001-01-01 10:10:10');
+SELECT MAX(t0)+1.1 FROM t1;
+MAX(t0)+1.1
+20010101101011.1
+CREATE TABLE t2 AS SELECT MAX(t0)+1.1 FROM t1;
+SELECT * FROM t2;
+MAX(t0)+1.1
+20010101101011.1
+SHOW COLUMNS FROM t2;
+Field	Type	Null	Key	Default	Extra
+MAX(t0)+1.1	decimal(21,1)	YES		NULL	
+DROP TABLE t2,t1;
+CREATE TABLE t1 (t0 DATETIME);
+INSERT INTO t1 VALUES ('2001-01-01 10:10:10');
+SELECT MAX(t0)+1e0 FROM t1;
+MAX(t0)+1e0
+20010101101011
+CREATE TABLE t2 AS SELECT MAX(t0)+1e0 FROM t1;
+SELECT * FROM t2;
+MAX(t0)+1e0
+20010101101011
+SHOW COLUMNS FROM t2;
+Field	Type	Null	Key	Default	Extra
+MAX(t0)+1e0	double	YES		NULL	
+DROP TABLE t2,t1;
+CREATE TABLE t1 (t1 DATETIME(1));
+INSERT INTO t1 VALUES ('2001-01-01 10:10:10');
+SELECT MAX(t1)+1 FROM t1;
+MAX(t1)+1
+20010101101011.0
+CREATE TABLE t2 AS SELECT MAX(t1)+1 FROM t1;
+SELECT * FROM t2;
+MAX(t1)+1
+20010101101011.0
+SHOW COLUMNS FROM t2;
+Field	Type	Null	Key	Default	Extra
+MAX(t1)+1	decimal(22,1)	YES		NULL	
+DROP TABLE t2,t1;
+#
 # End of 5.3 tests
 #

mysql-test/t/type_time.test

@@ -134,6 +134,74 @@ SELECT CONVERT_TZ(GREATEST(TIME('00:00:00'),TIME('00:00:00')),'+00:00','+7:5');
 SELECT CONCAT(GREATEST(TIME('00:00:01'),TIME('00:00:00')));
 SELECT CONCAT(GREATEST(TIME('32 00:00:01'),TIME('00:00:00')));
 
+--echo #
+--echo # MDEV-4859 Wrong value and data type of "SELECT MAX(time_column) + 1 FROM t1"
+--echo #
+CREATE TABLE t1 (t0 TIME);
+INSERT INTO t1 VALUES ('10:10:10');
+SELECT MAX(t0)+1 FROM t1;
+CREATE TABLE t2 AS SELECT MAX(t0)+1 FROM t1;
+SELECT * FROM t2;
+SHOW COLUMNS FROM t2;
+DROP TABLE t2,t1;
+
+CREATE TABLE t1 (t0 TIME);
+INSERT INTO t1 VALUES ('10:10:10');
+SELECT MAX(t0)+1.1 FROM t1;
+CREATE TABLE t2 AS SELECT MAX(t0)+1.1 FROM t1;
+SELECT * FROM t2;
+SHOW COLUMNS FROM t2;
+DROP TABLE t2,t1;
+
+CREATE TABLE t1 (t0 TIME);
+INSERT INTO t1 VALUES ('10:10:10');
+SELECT MAX(t0)+1e0 FROM t1;
+CREATE TABLE t2 AS SELECT MAX(t0)+1e0 FROM t1;
+SELECT * FROM t2;
+SHOW COLUMNS FROM t2;
+DROP TABLE t2,t1;
+
+CREATE TABLE t1 (t1 TIME(1));
+INSERT INTO t1 VALUES ('10:10:10');
+SELECT MAX(t1)+1 FROM t1;
+CREATE TABLE t2 AS SELECT MAX(t1)+1 FROM t1;
+SELECT * FROM t2;
+SHOW COLUMNS FROM t2;
+DROP TABLE t2,t1;
+
+CREATE TABLE t1 (t0 DATETIME);
+INSERT INTO t1 VALUES ('2001-01-01 10:10:10');
+SELECT MAX(t0)+1 FROM t1;
+CREATE TABLE t2 AS SELECT MAX(t0)+1 FROM t1;
+SELECT * FROM t2;
+SHOW COLUMNS FROM t2;
+DROP TABLE t2,t1;
+
+CREATE TABLE t1 (t0 DATETIME);
+INSERT INTO t1 VALUES ('2001-01-01 10:10:10');
+SELECT MAX(t0)+1.1 FROM t1;
+CREATE TABLE t2 AS SELECT MAX(t0)+1.1 FROM t1;
+SELECT * FROM t2;
+SHOW COLUMNS FROM t2;
+DROP TABLE t2,t1;
+
+CREATE TABLE t1 (t0 DATETIME);
+INSERT INTO t1 VALUES ('2001-01-01 10:10:10');
+SELECT MAX(t0)+1e0 FROM t1;
+CREATE TABLE t2 AS SELECT MAX(t0)+1e0 FROM t1;
+SELECT * FROM t2;
+SHOW COLUMNS FROM t2;
+DROP TABLE t2,t1;
+
+CREATE TABLE t1 (t1 DATETIME(1));
+INSERT INTO t1 VALUES ('2001-01-01 10:10:10');
+SELECT MAX(t1)+1 FROM t1;
+CREATE TABLE t2 AS SELECT MAX(t1)+1 FROM t1;
+SELECT * FROM t2;
+SHOW COLUMNS FROM t2;
+DROP TABLE t2,t1;
+
+
 --echo #
 --echo # End of 5.3 tests
 --echo #

sql/item.cc

@@ -350,6 +350,27 @@ my_decimal *Item::val_decimal_from_time(my_decimal *decimal_value)
 }
 
 
+longlong Item::val_int_from_date()
+{
+  DBUG_ASSERT(fixed == 1);
+  MYSQL_TIME ltime;
+  if (get_date(&ltime, 0))
+    return 0;
+  longlong v= TIME_to_ulonglong(&ltime);
+  return ltime.neg ? -v : v;
+}
+
+
+double Item::val_real_from_date()
+{
+  DBUG_ASSERT(fixed == 1);
+  MYSQL_TIME ltime;
+  if (get_date(&ltime, 0))
+    return 0;
+  return TIME_to_double(&ltime);
+}
+
+
 double Item::val_real_from_decimal()
 {
   /* Note that fix_fields may not be called for Item_avg_field items */
@@ -8381,6 +8402,18 @@ int Item_cache_int::save_in_field(Field *field, bool no_conversions)
 }
 
 
+longlong Item_cache_temporal::val_temporal_packed()
+{
+  DBUG_ASSERT(fixed == 1);
+  if ((!value_cached && !cache_value()) || null_value)
+  {
+    null_value= TRUE;
+    return 0;
+  }
+  return value;
+}
+
+
 String *Item_cache_temporal::val_str(String *str)
 {
   DBUG_ASSERT(fixed == 1);
@@ -8393,6 +8426,42 @@ String *Item_cache_temporal::val_str(String *str)
 }
 
 
+my_decimal *Item_cache_temporal::val_decimal(my_decimal *decimal_value)
+{
+  DBUG_ASSERT(fixed == 1);
+  if ((!value_cached && !cache_value()) || null_value)
+  {
+    null_value= true;
+    return NULL;
+  }
+  return val_decimal_from_date(decimal_value);
+}
+
+
+longlong Item_cache_temporal::val_int()
+{
+  DBUG_ASSERT(fixed == 1);
+  if ((!value_cached && !cache_value()) || null_value)
+  {
+    null_value= true;
+    return 0;
+  }
+  return val_int_from_date();
+}
+
+
+double Item_cache_temporal::val_real()
+{
+  DBUG_ASSERT(fixed == 1);
+  if ((!value_cached && !cache_value()) || null_value)
+  {
+    null_value= true;
+    return 0;
+  }
+  return val_real_from_date();
+}
+
+
 bool  Item_cache_temporal::cache_value()
 {
   if (!example)

sql/item.h

@@ -847,7 +847,9 @@ public:
   my_decimal *val_decimal_from_date(my_decimal *decimal_value);
   my_decimal *val_decimal_from_time(my_decimal *decimal_value);
   longlong val_int_from_decimal();
+  longlong val_int_from_date();
   double val_real_from_decimal();
+  double val_real_from_date();
 
   int save_time_in_field(Field *field);
   int save_date_in_field(Field *field);
@@ -3830,6 +3832,10 @@ public:
   }
 
   String* val_str(String *str);
+  my_decimal *val_decimal(my_decimal *);
+  longlong val_int();
+  longlong val_temporal_packed();
+  double val_real();
   bool cache_value();
   bool get_date(MYSQL_TIME *ltime, uint fuzzydate);
   int save_in_field(Field *field, bool no_conversions);

sql/item_cmpfunc.cc

@@ -877,10 +877,13 @@ get_datetime_value(THD *thd, Item ***item_arg, Item **cache_arg,
   enum_field_types f_type= item->cmp_type() == TIME_RESULT ?
                            item->field_type() : warn_item->field_type();
 
-  if (item->result_type() == INT_RESULT && item->cmp_type() == TIME_RESULT)
+  if (item->result_type() == INT_RESULT &&
+      item->cmp_type() == TIME_RESULT &&
+      item->type() == Item::CACHE_ITEM)
   {
-    /* it's our Item_cache_int, as created below */
-    value= item->val_int();
+    /* it's our Item_cache_temporal, as created below */
+    DBUG_ASSERT(is_temporal_type(((Item_cache *) item)->field_type()));
+    value= ((Item_cache_temporal*) item)->val_temporal_packed();
   }
   else
   {

sql/item_func.cc

@@ -798,6 +798,8 @@ void Item_num_op::find_num_type(void)
     cached_result_type= DECIMAL_RESULT;
     result_precision();
     fix_decimals();
+    if ((r0 == TIME_RESULT || r1 == TIME_RESULT) && decimals == 0)
+      cached_result_type= INT_RESULT;
   }
   else
   {

sql/item_sum.cc

@@ -687,7 +687,7 @@ Item_sum_hybrid::fix_fields(THD *thd, Item **ref)
 
 void Item_sum_hybrid::setup_hybrid(Item *item, Item *value_arg)
 {
-  if (!(value= Item_cache::get_cache(item)))
+  if (!(value= Item_cache::get_cache(item, item->cmp_type())))
     return;
   value->setup(item);
   value->store(value_arg);

sql/item_timefunc.cc

@@ -1362,27 +1362,6 @@ String *Item_temporal_func::val_str(String *str)
 }
 
 
-longlong Item_temporal_func::val_int()
-{
-  DBUG_ASSERT(fixed == 1);
-  MYSQL_TIME ltime;
-  if (get_date(&ltime, 0))
-    return 0;
-  longlong v= TIME_to_ulonglong(&ltime);
-  return ltime.neg ? -v : v;
-}
-
-
-double Item_temporal_func::val_real()
-{
-  DBUG_ASSERT(fixed == 1);
-  MYSQL_TIME ltime;
-  if (get_date(&ltime, 0))
-    return 0;
-  return TIME_to_double(&ltime);
-}
-
-
 bool Item_func_from_days::get_date(MYSQL_TIME *ltime, uint fuzzy_date)
 {
   longlong value=args[0]->val_int();

sql/item_timefunc.h

@@ -448,8 +448,8 @@ public:
   enum Item_result result_type () const { return STRING_RESULT; }
   enum_field_types field_type() const { return MYSQL_TYPE_DATETIME; }
   String *val_str(String *str);
-  longlong val_int();
-  double val_real();
+  longlong val_int() { return val_int_from_date(); }
+  double val_real() { return val_real_from_date(); }
   bool get_date(MYSQL_TIME *res, uint fuzzy_date) { DBUG_ASSERT(0); return 1; }
   my_decimal *val_decimal(my_decimal *decimal_value)
   { return  val_decimal_from_date(decimal_value); }