A fix (bug #8489: Strange auto_increment behaviour with HEAP table).

heap/hp_create.c:
  A fix (bug #8489: Strange auto_increment behaviour with HEAP table).
  Handle autoincrement keys MyISAM-way.
include/heap.h:
  A fix (bug #8489: Strange auto_increment behaviour with HEAP table).
  Handle autoincrement keys MyISAM-way.
sql/ha_heap.cc:
  A fix (bug #8489: Strange auto_increment behaviour with HEAP table).
  Handle autoincrement keys MyISAM-way.

1 files changed, 8 insertions, 4 deletions

diff --git a/sql/ha_heap.cc b/sql/ha_heap.cc
index 3c2249ce281..c483ab8fffa 100644
--- a/sql/ha_heap.cc
+++ b/sql/ha_heap.cc
@@ -446,6 +446,7 @@ int ha_heap::create(const char *name, TABLE *table_arg,
   HA_KEYSEG *seg;
   char buff[FN_REFLEN];
   int error;
+  bool found_real_auto_increment= 0;
 
   for (key= parts= 0; key < table_arg->keys; key++)
     parts+= table_arg->key_info[key].key_parts;
@@ -506,17 +507,20 @@ int ha_heap::create(const char *name, TABLE *table_arg,
 	seg->null_bit= 0;
 	seg->null_pos= 0;
       }
+      // We have to store field->key_type() as seg->type can differ from it
       if (field->flags & AUTO_INCREMENT_FLAG)
-      {
-	auto_key= key + 1;
 	auto_key_type= field->key_type();
-      }
     }
   }
+  if (table_arg->found_next_number_field)
+  {
+    keydef[table_arg->next_number_index].flag|= HA_AUTO_KEY;
+    found_real_auto_increment= table_arg->next_number_key_offset == 0;
+  }
   mem_per_row+= MY_ALIGN(table_arg->reclength + 1, sizeof(char*));
   HP_CREATE_INFO hp_create_info;
-  hp_create_info.auto_key= auto_key;
   hp_create_info.auto_key_type= auto_key_type;
+  hp_create_info.with_auto_increment= found_real_auto_increment;
   hp_create_info.auto_increment= (create_info->auto_increment_value ?
 				  create_info->auto_increment_value - 1 : 0);
   hp_create_info.max_table_size=current_thd->variables.max_heap_table_size;