Auto-merge from upstream 5.1-bugteam

4 files changed, 9 insertions, 8 deletions

diff --git a/sql/ha_partition.cc b/sql/ha_partition.cc
index 9617b9941bc..0e36a868b3e 100644
--- a/sql/ha_partition.cc
+++ b/sql/ha_partition.cc
@@ -4815,7 +4815,7 @@ int ha_partition::info(uint flag)
     /*
       Calculates statistical variables
       records:           Estimate of number records in table
-      We report sum (always at least 2)
+      We report sum (always at least 2 if not empty)
       deleted:           Estimate of number holes in the table due to
       deletes
       We report sum
@@ -4854,13 +4854,13 @@ int ha_partition::info(uint flag)
           stats.check_time= file->stats.check_time;
       }
     } while (*(++file_array));
-    if (stats.records < 2 &&
+    if (stats.records && stats.records < 2 &&
         !(m_file[0]->ha_table_flags() & HA_STATS_RECORDS_IS_EXACT))
       stats.records= 2;
     if (stats.records > 0)
       stats.mean_rec_length= (ulong) (stats.data_file_length / stats.records);
     else
-      stats.mean_rec_length= 1; //? What should we set here 
+      stats.mean_rec_length= 0;
   }
   if (flag & HA_STATUS_CONST)
   {
diff --git a/sql/mysqld.cc b/sql/mysqld.cc
index 022dbdbe7e3..1e9d942b1dd 100644
--- a/sql/mysqld.cc
+++ b/sql/mysqld.cc
@@ -230,7 +230,7 @@ extern "C" sig_handler handle_segfault(int sig);
 #if defined(__linux__)
 #define ENABLE_TEMP_POOL 1
 #else
-#define ENABLE_TEMP_TOOL 0
+#define ENABLE_TEMP_POOL 0
 #endif
 
 /* Constants */
diff --git a/sql/set_var.cc b/sql/set_var.cc
index c8b3f068b30..07e1528d483 100644
--- a/sql/set_var.cc
+++ b/sql/set_var.cc
@@ -1527,14 +1527,14 @@ bool sys_var_thd_ulong::update(THD *thd, set_var *var)
   ulonglong tmp= var->save_result.ulonglong_value;
 
   /* Don't use bigger value than given with --maximum-variable-name=.. */
-  if ((ulong) tmp > max_system_variables.*offset)
+  if (tmp > max_system_variables.*offset)
   {
     throw_bounds_warning(thd, TRUE, TRUE, name, (longlong) tmp);
     tmp= max_system_variables.*offset;
   }
 
   if (option_limits)
-    tmp= (ulong) fix_unsigned(thd, tmp, option_limits);
+    tmp= fix_unsigned(thd, tmp, option_limits);
 #if SIZEOF_LONG < SIZEOF_LONG_LONG
   else if (tmp > ULONG_MAX)
   {
@@ -1543,6 +1543,7 @@ bool sys_var_thd_ulong::update(THD *thd, set_var *var)
   }
 #endif
 
+  DBUG_ASSERT(tmp <= ULONG_MAX);
   if (var->type == OPT_GLOBAL)
     global_system_variables.*offset= (ulong) tmp;
   else
diff --git a/sql/sql_partition.cc b/sql/sql_partition.cc
index e96d9c11a84..ad24aa3c283 100644
--- a/sql/sql_partition.cc
+++ b/sql/sql_partition.cc
@@ -6760,7 +6760,7 @@ int get_part_iter_for_interval_via_mapping(partition_info *part_info,
     store_key_image_to_rec(field, max_value, field_len);
     bool include_endp= !test(flags & NEAR_MAX);
     part_iter->part_nums.end= get_endpoint(part_info, 0, include_endp);
-    if (part_iter->part_nums.start == part_iter->part_nums.end &&
+    if (part_iter->part_nums.start >= part_iter->part_nums.end &&
         !part_iter->ret_null_part)
       return 0; /* No partitions */
   }
@@ -6938,7 +6938,7 @@ int get_part_iter_for_interval_via_walking(partition_info *part_info,
 
 uint32 get_next_partition_id_range(PARTITION_ITERATOR* part_iter)
 {
-  if (part_iter->part_nums.cur == part_iter->part_nums.end)
+  if (part_iter->part_nums.cur >= part_iter->part_nums.end)
   {
     part_iter->part_nums.cur= part_iter->part_nums.start;
     return NOT_A_PARTITION_ID;