5.1 merge

mysql-test/r/func_str.result

@@ -2628,4 +2628,22 @@ SELECT * FROM t1;
 a
 aaaaaaaaaaaaaa
 DROP TABLE t1;
+SELECT SUBSTRING('1', DAY(FROM_UNIXTIME(-1)));
+SUBSTRING('1', DAY(FROM_UNIXTIME(-1)))
+NULL
+SELECT LEFT('1', DAY(FROM_UNIXTIME(-1)));
+LEFT('1', DAY(FROM_UNIXTIME(-1)))
+NULL
+SELECT RIGHT('1', DAY(FROM_UNIXTIME(-1)));
+RIGHT('1', DAY(FROM_UNIXTIME(-1)))
+NULL
+SELECT REPEAT('1', DAY(FROM_UNIXTIME(-1)));
+REPEAT('1', DAY(FROM_UNIXTIME(-1)))
+NULL
+SELECT RPAD('hi', DAY(FROM_UNIXTIME(-1)),'?');
+RPAD('hi', DAY(FROM_UNIXTIME(-1)),'?')
+NULL
+SELECT LPAD('hi', DAY(FROM_UNIXTIME(-1)),'?');
+LPAD('hi', DAY(FROM_UNIXTIME(-1)),'?')
+NULL
 End of 5.1 tests

mysql-test/r/group_min_max.result

@@ -2780,6 +2780,13 @@ ORDER BY min_a;
 min_a
 NULL
 DROP TABLE t1;
+create table t1 (a int, b varchar(1), key(b,a)) engine=myisam;
+insert t1 values (1,'a'),(2,'b'),(3,'c'),(4,'d'),(5,'e'),(6,'f'),(7,'g'),(8,'h'),(null,'i');
+select min(a), b from t1 where a=7 or b='z' group by b;
+min(a)	b
+7	g
+flush tables;
+drop table t1;
 #
 # LP BUG#888456 Wrong result with DISTINCT , ANY , subquery_cache=off , NOT NULL
 #

mysql-test/t/func_str.test

@@ -1380,4 +1380,15 @@ LOAD DATA INFILE 'bug58165.txt' INTO TABLE t1;
 SELECT * FROM t1;
 DROP TABLE t1;
 
+#
+# MDEV-759 lp:998340 - Valgrind complains on simple selects containing expression DAY(FROM_UNIXTIME(-1))
+#
+SELECT SUBSTRING('1', DAY(FROM_UNIXTIME(-1)));
+SELECT LEFT('1', DAY(FROM_UNIXTIME(-1)));
+SELECT RIGHT('1', DAY(FROM_UNIXTIME(-1)));
+SELECT REPEAT('1', DAY(FROM_UNIXTIME(-1)));
+SELECT RPAD('hi', DAY(FROM_UNIXTIME(-1)),'?');
+SELECT LPAD('hi', DAY(FROM_UNIXTIME(-1)),'?');
+
+
 --echo End of 5.1 tests

mysql-test/t/group_min_max.test

@@ -1099,6 +1099,15 @@ ORDER BY min_a;
 
 DROP TABLE t1;
 
+#
+# MDEV-729 lp:998028 - Server crashes on normal shutdown in closefrm after executing a query from MyISAM table
+#
+create table t1 (a int, b varchar(1), key(b,a)) engine=myisam;
+insert t1 values (1,'a'),(2,'b'),(3,'c'),(4,'d'),(5,'e'),(6,'f'),(7,'g'),(8,'h'),(null,'i');
+select min(a), b from t1 where a=7 or b='z' group by b;
+flush tables;
+drop table t1;
+
 --echo #
 --echo # LP BUG#888456 Wrong result with DISTINCT , ANY , subquery_cache=off , NOT NULL
 --echo #

sql/item_strfunc.cc

@@ -1167,7 +1167,7 @@ void Item_str_func::left_right_max_length()
   if (args[1]->const_item())
   {
     int length=(int) args[1]->val_int()*collation.collation->mbmaxlen;
-    if (length <= 0)
+    if (args[1]->null_value || length <= 0)
       max_length=0;
     else
       set_if_smaller(max_length,(uint) length);
@@ -1270,7 +1270,9 @@ void Item_func_substr::fix_length_and_dec()
   if (args[1]->const_item())
   {
     int32 start= (int32) args[1]->val_int();
-    if (start < 0)
+    if (args[1]->null_value)
+      max_length= 0;
+    else if (start < 0)
       max_length= ((uint)(-start) > max_length) ? 0 : (uint)(-start);
     else
       max_length-= min((uint)(start - 1), max_length);
@@ -1278,7 +1280,7 @@ void Item_func_substr::fix_length_and_dec()
   if (arg_count == 3 && args[2]->const_item())
   {
     int32 length= (int32) args[2]->val_int();
-    if (length <= 0)
+    if (args[2]->null_value || length <= 0)
       max_length=0; /* purecov: inspected */
     else
       set_if_smaller(max_length,(uint) length);
@@ -2411,7 +2413,9 @@ void Item_func_repeat::fix_length_and_dec()
 
     /* Assumes that the maximum length of a String is < INT_MAX32. */
     /* Set here so that rest of code sees out-of-bound value as such. */
-    if (count > INT_MAX32)
+    if (args[1]->null_value)
+      count= 0;
+    else if (count > INT_MAX32)
       count= INT_MAX32;
 
     ulonglong max_result_length= (ulonglong) args[0]->max_length * count;
@@ -2499,7 +2503,9 @@ void Item_func_rpad::fix_length_and_dec()
 
       /* Assumes that the maximum length of a String is < INT_MAX32. */
       /* Set here so that rest of code sees out-of-bound value as such. */
-      if (temp > INT_MAX32)
+      if (args[1]->null_value)
+        temp= 0;
+      else if (temp > INT_MAX32)
 	temp = INT_MAX32;
 
       length= temp * collation.collation->mbmaxlen;
@@ -2616,7 +2622,9 @@ void Item_func_lpad::fix_length_and_dec()
 
       /* Assumes that the maximum length of a String is < INT_MAX32. */
       /* Set here so that rest of code sees out-of-bound value as such. */
-      if (temp > INT_MAX32)
+      if (args[1]->null_value)
+        temp= 0;
+      else if (temp > INT_MAX32)
         temp= INT_MAX32;
 
       length= temp * collation.collation->mbmaxlen;

sql/opt_range.cc

@@ -10826,9 +10826,10 @@ int QUICK_GROUP_MIN_MAX_SELECT::next_min()
     */
     if (min_max_arg_part && min_max_arg_part->field->is_null())
     {
+      uchar *tmp_key_buff= (uchar*)my_alloca(max_used_key_length);
       /* Find the first subsequent record without NULL in the MIN/MAX field. */
-      key_copy(tmp_record, record, index_info, max_used_key_length);
+      key_copy(tmp_key_buff, record, index_info, max_used_key_length);
-      result= file->ha_index_read_map(record, tmp_record,
+      result= file->ha_index_read_map(record, tmp_key_buff,
                                       make_keypart_map(real_key_parts),
                                       HA_READ_AFTER_KEY);
       /*
@@ -10844,10 +10845,11 @@ int QUICK_GROUP_MIN_MAX_SELECT::next_min()
       if (!result)
       {
         if (key_cmp(index_info->key_part, group_prefix, real_prefix_len))
-          key_restore(record, tmp_record, index_info, 0);
+          key_restore(record, tmp_key_buff, index_info, 0);
       }
       else if (result == HA_ERR_KEY_NOT_FOUND || result == HA_ERR_END_OF_FILE)
         result= 0; /* There is a result in any case. */
+      my_afree(tmp_key_buff);
     }
   }