few small MySQL bugs/issues that impact the engines, as discussed in the SE summit

* remove handler::index_read_last()
* create handler::keyread_read_time() (was get_index_only_read_time() in opt_range.cc)
* ha_show_status() allows engine's show_status() to fail
* remove HTON_FLUSH_AFTER_RENAME
* fix key_cmp_if_same() to work for floats and doubles
* set table->status in the server, don't force engines to do it
* increment status vars in the server, don't force engines to do it

mysql-test/r/status_user.result:
  correct test results - innodb was wrongly counting internal
  index searches as handler_read_* calls.
sql/ha_partition.cc:
  compensate for handler incrementing status counters -
  we want to count only calls to underlying engines
sql/handler.h:
  inline methods moved to sql_class.h
sql/key.cc:
  simplify the check
sql/opt_range.cc:
  move get_index_only_read_time to the handler class
sql/sp.cc:
  don't use a key that's stored in the record buffer -
  the engine can overwrite the buffer with anything, destroying the key
sql/sql_class.h:
  inline handler methods that need to see THD and TABLE definitions
sql/sql_select.cc:
  no ha_index_read_last_map anymore
sql/sql_table.cc:
  remove HTON_FLUSH_AFTER_RENAME
sql/table.cc:
  set HA_CAN_MEMCMP as appropriate
sql/tztime.cc:
  don't use a key that's stored in the record buffer -
  the engine can overwrite the buffer with anything, destroying the key
storage/myisam/ha_myisam.cc:
  engines don't need to update table->status or use ha_statistic_increment anymore
storage/myisam/ha_myisam.h:
  index_read_last_map is no more

1 files changed, 0 insertions, 21 deletions

diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index a36775fdd20..624aab93e33 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -7668,27 +7668,6 @@ view_err:
   if (write_bin_log(thd, TRUE, thd->query(), thd->query_length()))
     DBUG_RETURN(TRUE);
 
-  if (ha_check_storage_engine_flag(old_db_type, HTON_FLUSH_AFTER_RENAME))
-  {
-    /*
-      For the alter table to be properly flushed to the logs, we
-      have to open the new table.  If not, we get a problem on server
-      shutdown. But we do not need to attach MERGE children.
-    */
-    char path[FN_REFLEN];
-    TABLE *t_table;
-    build_table_filename(path + 1, sizeof(path) - 1, new_db, table_name, "", 0);
-    t_table= open_temporary_table(thd, path, new_db, tmp_name, 0);
-    if (t_table)
-    {
-      intern_close_table(t_table);
-      my_free(t_table, MYF(0));
-    }
-    else
-      sql_print_warning("Could not open table %s.%s after rename\n",
-                        new_db,table_name);
-    ha_flush_logs(old_db_type);
-  }
   table_list->table=0;				// For query cache
   query_cache_invalidate3(thd, table_list, 0);